diff --git a/arduino.c b/arduino.c
index 0f1fcdf5..fa7e41e7 100644
--- a/arduino.c
+++ b/arduino.c
@@ -46,7 +46,7 @@ static int arduino_read_sig_bytes(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m)
   /* Signature byte reads are always 3 bytes. */
 
   if (m->size < 3) {
-    fprintf(stderr, "%s: memsize too small for sig byte read", progname);
+    avrdude_message("%s: memsize too small for sig byte read", progname);
     return -1;
   }
 
@@ -58,21 +58,19 @@ static int arduino_read_sig_bytes(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m)
   if (serial_recv(&pgm->fd, buf, 5) < 0)
     return -1;
   if (buf[0] == Resp_STK_NOSYNC) {
-    fprintf(stderr, "%s: stk500_cmd(): programmer is out of sync\n",
+    avrdude_message("%s: stk500_cmd(): programmer is out of sync\n",
 			progname);
 	return -1;
   } else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-			"\n%s: arduino_read_sig_bytes(): (a) protocol error, "
-			"expect=0x%02x, resp=0x%02x\n",
-			progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("\n%s: arduino_read_sig_bytes(): (a) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
 	return -2;
   }
   if (buf[4] != Resp_STK_OK) {
-    fprintf(stderr,
-			"\n%s: arduino_read_sig_bytes(): (a) protocol error, "
-			"expect=0x%02x, resp=0x%02x\n",
-			progname, Resp_STK_OK, buf[4]);
+    avrdude_message("\n%s: arduino_read_sig_bytes(): (a) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_OK, buf[4]);
     return -3;
   }
 
diff --git a/avr.c b/avr.c
index 9e3598f7..13330196 100644
--- a/avr.c
+++ b/avr.c
@@ -65,7 +65,7 @@ int avr_tpi_chip_erase(PROGRAMMER * pgm, AVRPART * p)
     /* Set Pointer Register */
     mem = avr_locate_mem(p, "flash");
     if (mem == NULL) {
-      fprintf(stderr, "No flash memory to erase for part %s\n",
+      avrdude_message("No flash memory to erase for part %s\n",
           p->desc);
       return -1;
     }
@@ -97,7 +97,7 @@ int avr_tpi_chip_erase(PROGRAMMER * pgm, AVRPART * p)
 
     return 0;
   } else {
-		fprintf(stderr, "%s called for a part that has no TPI\n", __func__);
+		avrdude_message("%s called for a part that has no TPI\n", __func__);
 		return -1;
 	}
 }
@@ -122,7 +122,7 @@ int avr_tpi_program_enable(PROGRAMMER * pgm, AVRPART * p, unsigned char guard_ti
     cmd[0] = (TPI_CMD_SLDCS | TPI_REG_TPIIR);
 		err = pgm->cmd_tpi(pgm, cmd, 1, &response, sizeof(response));
     if (err || response != TPI_IDENT_CODE) {
-      fprintf(stderr, "TPIIR not correct\n");
+      avrdude_message("TPIIR not correct\n");
       return -1;
     }
 
@@ -142,12 +142,12 @@ int avr_tpi_program_enable(PROGRAMMER * pgm, AVRPART * p, unsigned char guard_ti
 			return 0;
 		}
 
-		fprintf(stderr, "Error enabling TPI external programming mode:");
-		fprintf(stderr, "Target does not reply\n");
+		avrdude_message("Error enabling TPI external programming mode:");
+		avrdude_message("Target does not reply\n");
 		return -1;
 
 	} else {
-		fprintf(stderr, "%s called for a part that has no TPI\n", __func__);
+		avrdude_message("%s called for a part that has no TPI\n", __func__);
 		return -1;
 	}
 }
@@ -192,10 +192,9 @@ int avr_read_byte_default(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   OPCODE * readop, * lext;
 
   if (pgm->cmd == NULL) {
-    fprintf(stderr,
-	    "%s: Error: %s programmer uses avr_read_byte_default() but does not\n"
-	    "provide a cmd() method.\n",
-	    progname, pgm->type);
+    avrdude_message("%s: Error: %s programmer uses avr_read_byte_default() but does not\n"
+                    "provide a cmd() method.\n",
+                    progname, pgm->type);
     return -1;
   }
 
@@ -204,7 +203,7 @@ int avr_read_byte_default(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 
   if (p->flags & AVRPART_HAS_TPI) {
     if (pgm->cmd_tpi == NULL) {
-      fprintf(stderr, "%s: Error: %s programmer does not support TPI\n",
+      avrdude_message("%s: Error: %s programmer does not support TPI\n",
           progname, pgm->type);
       return -1;
     }
@@ -239,9 +238,8 @@ int avr_read_byte_default(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 
   if (readop == NULL) {
 #if DEBUG
-    fprintf(stderr, 
-            "avr_read_byte(): operation not supported on memory type \"%s\"\n",
-            mem->desc);
+    avrdude_message("avr_read_byte(): operation not supported on memory type \"%s\"\n",
+                    mem->desc);
 #endif
     return -1;
   }
@@ -325,7 +323,7 @@ int avr_read(PROGRAMMER * pgm, AVRPART * p, char * memtype,
   if (v != NULL)
       vmem = avr_locate_mem(v, memtype);
   if (mem == NULL) {
-    fprintf(stderr, "No \"%s\" memory for part %s\n",
+    avrdude_message("No \"%s\" memory for part %s\n",
             memtype, p->desc);
     return -1;
   }
@@ -358,7 +356,7 @@ int avr_read(PROGRAMMER * pgm, AVRPART * p, char * memtype,
         rc = pgm->cmd_tpi(pgm, cmd, 1, mem->buf + i, 1);
         lastaddr++;
         if (rc == -1) {
-          fprintf(stderr, "avr_read(): error reading address 0x%04lx\n", i);
+          avrdude_message("avr_read(): error reading address 0x%04lx\n", i);
           return -1;
         }
       }
@@ -415,9 +413,8 @@ int avr_read(PROGRAMMER * pgm, AVRPART * p, char * memtype,
           /* paged load failed, fall back to byte-at-a-time read below */
           failure = 1;
       } else if (verbose >= 3) {
-        fprintf(stderr,
-                "%s: avr_read(): skipping page %u: no interesting data\n",
-                progname, pageaddr / mem->page_size);
+        avrdude_message("%s: avr_read(): skipping page %u: no interesting data\n",
+                        progname, pageaddr / mem->page_size);
       }
       nread++;
       report_progress(nread, npages, NULL);
@@ -446,11 +443,10 @@ int avr_read(PROGRAMMER * pgm, AVRPART * p, char * memtype,
     {
       rc = pgm->read_byte(pgm, p, mem, i, mem->buf + i);
       if (rc != 0) {
-	fprintf(stderr, "avr_read(): error reading address 0x%04lx\n", i);
-	if (rc == -1) 
-	  fprintf(stderr, 
-		  "    read operation not supported for memory \"%s\"\n",
-		  memtype);
+	avrdude_message("avr_read(): error reading address 0x%04lx\n", i);
+	if (rc == -1)
+	  avrdude_message("    read operation not supported for memory \"%s\"\n",
+                          memtype);
 	return -2;
       }
     }
@@ -478,18 +474,16 @@ int avr_write_page(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   OPCODE * wp, * lext;
 
   if (pgm->cmd == NULL) {
-    fprintf(stderr,
-	    "%s: Error: %s programmer uses avr_write_page() but does not\n"
-	    "provide a cmd() method.\n",
-	    progname, pgm->type);
+    avrdude_message("%s: Error: %s programmer uses avr_write_page() but does not\n"
+                    "provide a cmd() method.\n",
+                    progname, pgm->type);
     return -1;
   }
 
   wp = mem->op[AVR_OP_WRITEPAGE];
   if (wp == NULL) {
-    fprintf(stderr, 
-            "avr_write_page(): memory \"%s\" not configured for page writes\n",
-            mem->desc);
+    avrdude_message("avr_write_page(): memory \"%s\" not configured for page writes\n",
+                    mem->desc);
     return -1;
   }
 
@@ -550,25 +544,24 @@ int avr_write_byte_default(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   struct timeval tv;
 
   if (pgm->cmd == NULL) {
-    fprintf(stderr,
-	    "%s: Error: %s programmer uses avr_write_byte_default() but does not\n"
-	    "provide a cmd() method.\n",
-	    progname, pgm->type);
+    avrdude_message("%s: Error: %s programmer uses avr_write_byte_default() but does not\n"
+                    "provide a cmd() method.\n",
+                    progname, pgm->type);
     return -1;
   }
 
   if (p->flags & AVRPART_HAS_TPI) {
     if (pgm->cmd_tpi == NULL) {
-      fprintf(stderr, "%s: Error: %s programmer does not support TPI\n",
+      avrdude_message("%s: Error: %s programmer does not support TPI\n",
           progname, pgm->type);
       return -1;
     }
 
     if (strcmp(mem->desc, "flash") == 0) {
-      fprintf(stderr, "Writing a byte to flash is not supported for %s\n", p->desc);
+      avrdude_message("Writing a byte to flash is not supported for %s\n", p->desc);
       return -1;
     } else if ((mem->offset + addr) & 1) {
-      fprintf(stderr, "Writing a byte to an odd location is not supported for %s\n", p->desc);
+      avrdude_message("Writing a byte to an odd location is not supported for %s\n", p->desc);
       return -1;
     }
 
@@ -656,9 +649,8 @@ int avr_write_byte_default(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 
   if (writeop == NULL) {
 #if DEBUG
-    fprintf(stderr, 
-            "avr_write_byte(): write not supported for memory type \"%s\"\n",
-            mem->desc);
+    avrdude_message("avr_write_byte(): write not supported for memory type \"%s\"\n",
+                    mem->desc);
 #endif
     return -1;
   }
@@ -750,27 +742,24 @@ int avr_write_byte_default(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
        * device if the data read back does not match what we wrote.
        */
       pgm->pgm_led(pgm, OFF);
-      fprintf(stderr,
-              "%s: this device must be powered off and back on to continue\n",
-              progname);
+      avrdude_message("%s: this device must be powered off and back on to continue\n",
+                      progname);
       if (pgm->pinno[PPI_AVR_VCC]) {
-        fprintf(stderr, "%s: attempting to do this now ...\n", progname);
+        avrdude_message("%s: attempting to do this now ...\n", progname);
         pgm->powerdown(pgm);
         usleep(250000);
         rc = pgm->initialize(pgm, p);
         if (rc < 0) {
-          fprintf(stderr, "%s: initialization failed, rc=%d\n", progname, rc);
-          fprintf(stderr, 
-                  "%s: can't re-initialize device after programming the "
-                  "%s bits\n", progname, mem->desc);
-          fprintf(stderr,
-                  "%s: you must manually power-down the device and restart\n"
-                  "%s:   %s to continue.\n",
-                  progname, progname, progname);
+          avrdude_message("%s: initialization failed, rc=%d\n", progname, rc);
+          avrdude_message("%s: can't re-initialize device after programming the "
+                          "%s bits\n", progname, mem->desc);
+          avrdude_message("%s: you must manually power-down the device and restart\n"
+                          "%s:   %s to continue.\n",
+                          progname, progname, progname);
           return -3;
         }
         
-        fprintf(stderr, "%s: device was successfully re-initialized\n",
+        avrdude_message("%s: device was successfully re-initialized\n",
                 progname);
         return 0;
       }
@@ -852,7 +841,7 @@ int avr_write(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
 
   m = avr_locate_mem(p, memtype);
   if (m == NULL) {
-    fprintf(stderr, "No \"%s\" memory for part %s\n",
+    avrdude_message("No \"%s\" memory for part %s\n",
             memtype, p->desc);
     return -1;
   }
@@ -866,12 +855,11 @@ int avr_write(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
     wsize = size;
   }
   else if (size > wsize) {
-    fprintf(stderr, 
-            "%s: WARNING: %d bytes requested, but memory region is only %d"
-            "bytes\n"
-            "%sOnly %d bytes will actually be written\n",
-            progname, size, wsize,
-            progbuf, wsize);
+    avrdude_message("%s: WARNING: %d bytes requested, but memory region is only %d"
+                    "bytes\n"
+                    "%sOnly %d bytes will actually be written\n",
+                    progname, size, wsize,
+                    progbuf, wsize);
   }
 
 
@@ -958,9 +946,8 @@ int avr_write(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
           /* paged write failed, fall back to byte-at-a-time write below */
           failure = 1;
       } else if (verbose >= 3) {
-        fprintf(stderr,
-                "%s: avr_write(): skipping page %u: no interesting data\n",
-                progname, pageaddr / m->page_size);
+        avrdude_message("%s: avr_write(): skipping page %u: no interesting data\n",
+                        progname, pageaddr / m->page_size);
       }
       nwritten++;
       report_progress(nwritten, npages, NULL);
@@ -1019,8 +1006,8 @@ int avr_write(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
     if (do_write) {
       rc = avr_write_byte(pgm, p, m, i, data);
       if (rc) {
-        fprintf(stderr, " ***failed;  ");
-        fprintf(stderr, "\n");
+        avrdude_message(" ***failed;  ");
+        avrdude_message("\n");
         pgm->err_led(pgm, ON);
         werror = 1;
       }
@@ -1033,19 +1020,18 @@ int avr_write(PROGRAMMER * pgm, AVRPART * p, char * memtype, int size,
     if (flush_page) {
       rc = avr_write_page(pgm, p, m, i);
       if (rc) {
-        fprintf(stderr,
-                " *** page %d (addresses 0x%04x - 0x%04x) failed "
-                "to write\n",
-                i % m->page_size, 
-                i - m->page_size + 1, i);
-        fprintf(stderr, "\n");
+        avrdude_message(" *** page %d (addresses 0x%04x - 0x%04x) failed "
+                        "to write\n",
+                        i % m->page_size,
+                        i - m->page_size + 1, i);
+        avrdude_message("\n");
         pgm->err_led(pgm, ON);
           werror = 1;
       }
     }
 
     if (werror) {
-      /* 
+      /*
        * make sure the error led stay on if there was a previous write
        * error, otherwise it gets cleared in avr_write_byte()
        */
@@ -1068,9 +1054,8 @@ int avr_signature(PROGRAMMER * pgm, AVRPART * p)
   report_progress (0,1,"Reading");
   rc = avr_read(pgm, p, "signature", 0);
   if (rc < 0) {
-    fprintf(stderr,
-            "%s: error reading signature data for part \"%s\", rc=%d\n",
-            progname, p->desc, rc);
+    avrdude_message("%s: error reading signature data for part \"%s\", rc=%d\n",
+                    progname, p->desc, rc);
     return -1;
   }
   report_progress (1,1,NULL);
@@ -1095,17 +1080,15 @@ int avr_verify(AVRPART * p, AVRPART * v, char * memtype, int size)
 
   a = avr_locate_mem(p, memtype);
   if (a == NULL) {
-    fprintf(stderr, 
-            "avr_verify(): memory type \"%s\" not defined for part %s\n",
-            memtype, p->desc);
+    avrdude_message("avr_verify(): memory type \"%s\" not defined for part %s\n",
+                    memtype, p->desc);
     return -1;
   }
 
   b = avr_locate_mem(v, memtype);
   if (b == NULL) {
-    fprintf(stderr, 
-            "avr_verify(): memory type \"%s\" not defined for part %s\n",
-            memtype, v->desc);
+    avrdude_message("avr_verify(): memory type \"%s\" not defined for part %s\n",
+                    memtype, v->desc);
     return -1;
   }
 
@@ -1114,24 +1097,22 @@ int avr_verify(AVRPART * p, AVRPART * v, char * memtype, int size)
   vsize = a->size;
 
   if (vsize < size) {
-    fprintf(stderr, 
-            "%s: WARNING: requested verification for %d bytes\n"
-            "%s%s memory region only contains %d bytes\n"
-            "%sOnly %d bytes will be verified.\n",
-            progname, size,
-            progbuf, memtype, vsize,
-            progbuf, vsize);
+    avrdude_message("%s: WARNING: requested verification for %d bytes\n"
+                    "%s%s memory region only contains %d bytes\n"
+                    "%sOnly %d bytes will be verified.\n",
+                    progname, size,
+                    progbuf, memtype, vsize,
+                    progbuf, vsize);
     size = vsize;
   }
 
   for (i=0; i<size; i++) {
     if ((b->tags[i] & TAG_ALLOCATED) != 0 &&
         buf1[i] != buf2[i]) {
-      fprintf(stderr, 
-              "%s: verification error, first mismatch at byte 0x%04x\n"
-              "%s0x%02x != 0x%02x\n",
-              progname, i, 
-              progbuf, buf1[i], buf2[i]);
+      avrdude_message("%s: verification error, first mismatch at byte 0x%04x\n"
+                      "%s0x%02x != 0x%02x\n",
+                      progname, i,
+                      progbuf, buf1[i], buf2[i]);
       return -1;
     }
   }
@@ -1156,7 +1137,7 @@ int avr_get_cycle_count(PROGRAMMER * pgm, AVRPART * p, int * cycles)
   for (i=4; i>0; i--) {
     rc = pgm->read_byte(pgm, p, a, a->size-i, &v1);
   if (rc < 0) {
-    fprintf(stderr, "%s: WARNING: can't read memory for cycle count, rc=%d\n",
+    avrdude_message("%s: WARNING: can't read memory for cycle count, rc=%d\n",
             progname, rc);
     return -1;
   }
@@ -1197,7 +1178,7 @@ int avr_put_cycle_count(PROGRAMMER * pgm, AVRPART * p, int cycles)
 
     rc = avr_write_byte(pgm, p, a, a->size-i, v1);
     if (rc < 0) {
-      fprintf(stderr, "%s: WARNING: can't write memory for cycle count, rc=%d\n",
+      avrdude_message("%s: WARNING: can't write memory for cycle count, rc=%d\n",
               progname, rc);
       return -1;
     }
diff --git a/avr910.c b/avr910.c
index be725360..2f721274 100644
--- a/avr910.c
+++ b/avr910.c
@@ -59,9 +59,8 @@ struct pdata
 static void avr910_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: avr910_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: avr910_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -86,9 +85,8 @@ static int avr910_recv(PROGRAMMER * pgm, char * buf, size_t len)
 
   rv = serial_recv(&pgm->fd, (unsigned char *)buf, len);
   if (rv < 0) {
-    fprintf(stderr,
-	    "%s: avr910_recv(): programmer is not responding\n",
-	    progname);
+    avrdude_message("%s: avr910_recv(): programmer is not responding\n",
+                    progname);
     return 1;
   }
   return 0;
@@ -107,7 +105,7 @@ static int avr910_vfy_cmd_sent(PROGRAMMER * pgm, char * errmsg)
 
   avr910_recv(pgm, &c, 1);
   if (c != '\r') {
-    fprintf(stderr, "%s: error: programmer did not respond to command: %s\n",
+    avrdude_message("%s: error: programmer did not respond to command: %s\n",
             progname, errmsg);
     return 1;
   }
@@ -189,16 +187,16 @@ static int avr910_initialize(PROGRAMMER * pgm, AVRPART * p)
   avr910_send(pgm, "p", 1);
   avr910_recv(pgm, &type, 1);
 
-  fprintf(stderr, "Found programmer: Id = \"%s\"; type = %c\n", id, type);
-  fprintf(stderr, "    Software Version = %c.%c; ", sw[0], sw[1]);
-  fprintf(stderr, "Hardware Version = %c.%c\n", hw[0], hw[1]);
+  avrdude_message("Found programmer: Id = \"%s\"; type = %c\n", id, type);
+  avrdude_message("    Software Version = %c.%c; ", sw[0], sw[1]);
+  avrdude_message("Hardware Version = %c.%c\n", hw[0], hw[1]);
 
   /* See if programmer supports autoincrement of address. */
 
   avr910_send(pgm, "a", 1);
   avr910_recv(pgm, &PDATA(pgm)->has_auto_incr_addr, 1);
   if (PDATA(pgm)->has_auto_incr_addr == 'Y')
-      fprintf(stderr, "Programmer supports auto addr increment.\n");
+      avrdude_message("Programmer supports auto addr increment.\n");
 
   /* Check support for buffered memory access, ignore if not available */
 
@@ -210,10 +208,9 @@ static int avr910_initialize(PROGRAMMER * pgm, AVRPART * p)
       PDATA(pgm)->buffersize = (unsigned int)(unsigned char)c<<8;
       avr910_recv(pgm, &c, 1);
       PDATA(pgm)->buffersize += (unsigned int)(unsigned char)c;
-      fprintf(stderr,
-	      "Programmer supports buffered memory access with "
-	      "buffersize = %u bytes.\n",
-	      PDATA(pgm)->buffersize);
+      avrdude_message("Programmer supports buffered memory access with "
+                      "buffersize = %u bytes.\n",
+                      PDATA(pgm)->buffersize);
       PDATA(pgm)->use_blockmode = 1;
     } else {
       PDATA(pgm)->use_blockmode = 0;
@@ -229,7 +226,7 @@ static int avr910_initialize(PROGRAMMER * pgm, AVRPART * p)
     /* Get list of devices that the programmer supports. */
 
     avr910_send(pgm, "t", 1);
-    fprintf(stderr, "\nProgrammer supports the following devices:\n");
+    avrdude_message("\nProgrammer supports the following devices:\n");
     devtype_1st = 0;
     while (1) {
       avr910_recv(pgm, &c, 1);
@@ -239,19 +236,18 @@ static int avr910_initialize(PROGRAMMER * pgm, AVRPART * p)
 	break;
       part = locate_part_by_avr910_devcode(part_list, c);
 
-      fprintf(stderr, "    Device code: 0x%02x = %s\n", c, part ?  part->desc : "(unknown)");
+      avrdude_message("    Device code: 0x%02x = %s\n", c, part ?  part->desc : "(unknown)");
 
       /* FIXME: Need to lookup devcode and report the device. */
 
       if (p->avr910_devcode == c)
 	dev_supported = 1;
     };
-    fprintf(stderr,"\n");
+    avrdude_message("\n");
 
     if (!dev_supported) {
-      fprintf(stderr,
-	      "%s: %s: selected device is not supported by programmer: %s\n",
-	      progname, ovsigck? "warning": "error", p->id);
+      avrdude_message("%s: %s: selected device is not supported by programmer: %s\n",
+                      progname, ovsigck? "warning": "error", p->id);
       if (!ovsigck)
 	return -1;
     }
@@ -271,9 +267,8 @@ static int avr910_initialize(PROGRAMMER * pgm, AVRPART * p)
   avr910_vfy_cmd_sent(pgm, "select device");
 
   if (verbose)
-    fprintf(stderr,
-	    "%s: avr910_devcode selected: 0x%02x\n",
-	    progname, (unsigned)buf[1]);
+    avrdude_message("%s: avr910_devcode selected: 0x%02x\n",
+                    progname, (unsigned)buf[1]);
 
   avr910_enter_prog_mode(pgm);
 
@@ -339,16 +334,14 @@ static int avr910_parseextparms(PROGRAMMER * pgm, LISTID extparms)
       int devcode;
       if (sscanf(extended_param, "devcode=%i", &devcode) != 1 ||
 	  devcode <= 0 || devcode > 255) {
-        fprintf(stderr,
-                "%s: avr910_parseextparms(): invalid devcode '%s'\n",
-                progname, extended_param);
+        avrdude_message("%s: avr910_parseextparms(): invalid devcode '%s'\n",
+                        progname, extended_param);
         rv = -1;
         continue;
       }
       if (verbose >= 2) {
-        fprintf(stderr,
-                "%s: avr910_parseextparms(): devcode overwritten as 0x%02x\n",
-                progname, devcode);
+        avrdude_message("%s: avr910_parseextparms(): devcode overwritten as 0x%02x\n",
+                        progname, devcode);
       }
       PDATA(pgm)->devcode = devcode;
 
@@ -356,18 +349,16 @@ static int avr910_parseextparms(PROGRAMMER * pgm, LISTID extparms)
     }
     if (strncmp(extended_param, "no_blockmode", strlen("no_blockmode")) == 0) {
       if (verbose >= 2) {
-        fprintf(stderr,
-                "%s: avr910_parseextparms(-x): no testing for Blockmode\n",
-                progname);
+        avrdude_message("%s: avr910_parseextparms(-x): no testing for Blockmode\n",
+                        progname);
       }
       PDATA(pgm)->test_blockmode = 0;
 
       continue;
     }
 
-    fprintf(stderr,
-            "%s: avr910_parseextparms(): invalid extended parameter '%s'\n",
-            progname, extended_param);
+    avrdude_message("%s: avr910_parseextparms(): invalid extended parameter '%s'\n",
+                    progname, extended_param);
     rv = -1;
   }
 
@@ -739,7 +730,7 @@ static int avr910_read_sig_bytes(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m)
   unsigned char tmp;
 
   if (m->size < 3) {
-    fprintf(stderr, "%s: memsize too small for sig byte read", progname);
+    avrdude_message("%s: memsize too small for sig byte read", progname);
     return -1;
   }
 
diff --git a/avrdude.h b/avrdude.h
index ede4aea5..a5a8364a 100644
--- a/avrdude.h
+++ b/avrdude.h
@@ -28,6 +28,8 @@ extern int ovsigck;		/* override signature check (-F) */
 extern int verbose;		/* verbosity level (-v, -vv, ...) */
 extern int quell_progress;	/* quiteness level (-q, -qq) */
 
+int avrdude_message(const char *format, ...);
+
 #if defined(WIN32NATIVE)
 
 #include "ac_cfg.h"
diff --git a/avrftdi.c b/avrftdi.c
index ed319361..8b22ffdc 100644
--- a/avrftdi.c
+++ b/avrftdi.c
@@ -54,9 +54,8 @@
 
 static int avrftdi_noftdi_open (struct programmer_t *pgm, char * name)
 {
-	fprintf(stderr,
-		"%s: Error: no libftdi or libusb support. Install libftdi1/libusb-1.0 or libftdi/libusb and run configure/make again.\n",
-		progname);
+	avrdude_message("%s: Error: no libftdi or libusb support. Install libftdi1/libusb-1.0 or libftdi/libusb and run configure/make again.\n",
+                        progname);
 
 	return -1;
 }
@@ -145,17 +144,17 @@ void avrftdi_log(int level, const char * func, int line,
 		if(!skip_prefix)
 		{
 			switch(level) {
-				case ERR: fprintf(stderr, "E "); break;
-				case WARN:  fprintf(stderr, "W "); break;
-				case INFO:  fprintf(stderr, "I "); break;
-				case DEBUG: fprintf(stderr, "D "); break;
-				case TRACE: fprintf(stderr, "T "); break;
-				default: fprintf(stderr, "  ");
+				case ERR: avrdude_message("E "); break;
+				case WARN:  avrdude_message("W "); break;
+				case INFO:  avrdude_message("I "); break;
+				case DEBUG: avrdude_message("D "); break;
+				case TRACE: avrdude_message("T "); break;
+				default: avrdude_message("  ");
 			}
-			fprintf(stderr, "%s(%d): ", func, line);
+			avrdude_message("%s(%d): ", func, line);
 		}
 		va_start(ap, fmt);
-		vfprintf(stderr, fmt, ap);
+		vavrdude_message(fmt, ap);
 		va_end(ap);
 	}
 
@@ -175,16 +174,16 @@ static void buf_dump(const unsigned char *buf, int len, char *desc,
 		     int offset, int width)
 {
 	int i;
-	fprintf(stderr, "%s begin:\n", desc);
+	avrdude_message("%s begin:\n", desc);
 	for (i = 0; i < offset; i++)
-		fprintf(stderr, "%02x ", buf[i]);
-	fprintf(stderr, "\n");
+		avrdude_message("%02x ", buf[i]);
+	avrdude_message("\n");
 	for (i++; i <= len; i++) {
-		fprintf(stderr, "%02x ", buf[i-1]);
+		avrdude_message("%02x ", buf[i-1]);
 		if((i-offset) != 0 && (i-offset)%width == 0)
-		    fprintf(stderr, "\n");
+		    avrdude_message("\n");
 	}
-	fprintf(stderr, "%s end\n", desc);
+	avrdude_message("%s end\n", desc);
 }
 
 /*
@@ -357,7 +356,7 @@ static int avrftdi_transmit_bb(PROGRAMMER * pgm, unsigned char mode, const unsig
 	size_t max_size = MIN(pdata->ftdic->max_packet_size,pdata->tx_buffer_size);
 	// select block size so that resulting commands does not exceed max_size if possible
 	blocksize = MAX(1,(max_size-7)/((8*2*6)+(8*1*2)));
-	//fprintf(stderr,"blocksize %d \n",blocksize);
+	//avrdude_message("blocksize %d \n",blocksize);
 
 	while(remaining)
 	{
@@ -673,9 +672,8 @@ static int avrftdi_open(PROGRAMMER * pgm, char *port)
 	if (usbpid) {
 		pid = *(int *)(ldata(usbpid));
 		if (lnext(usbpid))
-			fprintf(stderr,
-				"%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
-				progname, pid);
+			avrdude_message("%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
+                                        progname, pid);
 	} else
 		pid = USB_DEVICE_FT2232;
 
diff --git a/avrftdi_private.h b/avrftdi_private.h
index fbd04cec..aa74315e 100644
--- a/avrftdi_private.h
+++ b/avrftdi_private.h
@@ -43,7 +43,7 @@ enum { ERR, WARN, INFO, DEBUG, TRACE };
 	do {                                                              \
 		if ((x))                                                        \
 		{                                                               \
-			fprintf(stderr, "%s:%d %s() %s: %s (%d)\n\t%s\n",             \
+			avrdude_message("%s:%d %s() %s: %s (%d)\n\t%s\n",             \
 					__FILE__, __LINE__, __FUNCTION__,                         \
 					#x, strerror(errno), errno, ftdi_get_error_string(ftdi)); \
 			return -1;                                                    \
@@ -54,7 +54,7 @@ enum { ERR, WARN, INFO, DEBUG, TRACE };
 	do {                                                              \
 		if ((x))                                                        \
 		{                                                               \
-			fprintf(stderr, "%s:%d %s() %s: %s (%d)\n\t%s\n",             \
+			avrdude_message("%s:%d %s() %s: %s (%d)\n\t%s\n",             \
 					__FILE__, __LINE__, __FUNCTION__,                         \
 	 			 #x, strerror(errno), errno, ftdi_get_error_string(ftdi));  \
 		}                                                               \
diff --git a/avrpart.c b/avrpart.c
index af17429e..61463e90 100644
--- a/avrpart.c
+++ b/avrpart.c
@@ -37,7 +37,7 @@ OPCODE * avr_new_opcode(void)
 
   m = (OPCODE *)malloc(sizeof(*m));
   if (m == NULL) {
-    fprintf(stderr, "avr_new_opcode(): out of memory\n");
+    avrdude_message("avr_new_opcode(): out of memory\n");
     exit(1);
   }
 
@@ -57,7 +57,7 @@ static OPCODE * avr_dup_opcode(OPCODE * op)
 
   m = (OPCODE *)malloc(sizeof(*m));
   if (m == NULL) {
-    fprintf(stderr, "avr_dup_opcode(): out of memory\n");
+    avrdude_message("avr_dup_opcode(): out of memory\n");
     exit(1);
   }
 
@@ -250,7 +250,7 @@ AVRMEM * avr_new_memtype(void)
 
   m = (AVRMEM *)malloc(sizeof(*m));
   if (m == NULL) {
-    fprintf(stderr, "avr_new_memtype(): out of memory\n");
+    avrdude_message("avr_new_memtype(): out of memory\n");
     exit(1);
   }
 
@@ -273,13 +273,13 @@ int avr_initmem(AVRPART * p)
     m = ldata(ln);
     m->buf = (unsigned char *) malloc(m->size);
     if (m->buf == NULL) {
-      fprintf(stderr, "%s: can't alloc buffer for %s size of %d bytes\n",
+      avrdude_message("%s: can't alloc buffer for %s size of %d bytes\n",
               progname, m->desc, m->size);
       return -1;
     }
     m->tags = (unsigned char *) malloc(m->size);
     if (m->tags == NULL) {
-      fprintf(stderr, "%s: can't alloc buffer for %s size of %d bytes\n",
+      avrdude_message("%s: can't alloc buffer for %s size of %d bytes\n",
               progname, m->desc, m->size);
       return -1;
     }
@@ -301,9 +301,8 @@ AVRMEM * avr_dup_mem(AVRMEM * m)
   if (m->buf != NULL) {
     n->buf = (unsigned char *)malloc(n->size);
     if (n->buf == NULL) {
-      fprintf(stderr,
-              "avr_dup_mem(): out of memory (memsize=%d)\n",
-              n->size);
+      avrdude_message("avr_dup_mem(): out of memory (memsize=%d)\n",
+                      n->size);
       exit(1);
     }
     memcpy(n->buf, m->buf, n->size);
@@ -312,9 +311,8 @@ AVRMEM * avr_dup_mem(AVRMEM * m)
   if (m->tags != NULL) {
     n->tags = (unsigned char *)malloc(n->size);
     if (n->tags == NULL) {
-      fprintf(stderr,
-              "avr_dup_mem(): out of memory (memsize=%d)\n",
-              n->size);
+      avrdude_message("avr_dup_mem(): out of memory (memsize=%d)\n",
+                      n->size);
       exit(1);
     }
     memcpy(n->tags, m->tags, n->size);
@@ -407,11 +405,10 @@ void avr_mem_display(const char * prefix, FILE * f, AVRMEM * m, int type,
             m->readback[0],
             m->readback[1]);
     if (verbose > 4) {
-      fprintf(stderr,
-              "%s  Memory Ops:\n"
-              "%s    Oeration     Inst Bit  Bit Type  Bitno  Value\n"
-              "%s    -----------  --------  --------  -----  -----\n",
-              prefix, prefix, prefix);
+      avrdude_message("%s  Memory Ops:\n"
+                      "%s    Oeration     Inst Bit  Bit Type  Bitno  Value\n"
+                      "%s    -----------  --------  --------  -----  -----\n",
+                      prefix, prefix, prefix);
       for (i=0; i<AVR_OP_MAX; i++) {
         if (m->op[i]) {
           for (j=31; j>=0; j--) {
@@ -445,7 +442,7 @@ AVRPART * avr_new_part(void)
 
   p = (AVRPART *)malloc(sizeof(AVRPART));
   if (p == NULL) {
-    fprintf(stderr, "new_part(): out of memory\n");
+    avrdude_message("new_part(): out of memory\n");
     exit(1);
   }
 
diff --git a/bitbang.c b/bitbang.c
index d059702c..29561144 100644
--- a/bitbang.c
+++ b/bitbang.c
@@ -75,9 +75,8 @@ static void bitbang_calibrate_delay(void)
   {
     has_perfcount = 1;
     if (verbose >= 2)
-      fprintf(stderr,
-              "%s: Using performance counter for bitbang delays\n",
-              progname);
+      avrdude_message("%s: Using performance counter for bitbang delays\n",
+                      progname);
   }
   else
   {
@@ -91,9 +90,8 @@ static void bitbang_calibrate_delay(void)
      * comparable hardware.
      */
     if (verbose >= 2)
-      fprintf(stderr,
-      "%s: Using guessed per-microsecond delay count for bitbang delays\n",
-              progname);
+      avrdude_message("%s: Using guessed per-microsecond delay count for bitbang delays\n",
+                      progname);
     delay_decrement = 100;
   }
 #else  /* !WIN32NATIVE */
@@ -101,9 +99,8 @@ static void bitbang_calibrate_delay(void)
   volatile int i;
 
   if (verbose >= 2)
-    fprintf(stderr,
-	    "%s: Calibrating delay loop...",
-	    progname);
+    avrdude_message("%s: Calibrating delay loop...",
+                    progname);
   i = 0;
   done = 0;
   saved_alarmhandler = signal(SIGALRM, alarmhandler);
@@ -130,9 +127,8 @@ static void bitbang_calibrate_delay(void)
    */
   delay_decrement = -i / 100000;
   if (verbose >= 2)
-    fprintf(stderr,
-	    " calibrated to %d cycles per us\n",
-	    delay_decrement);
+    avrdude_message(" calibrated to %d cycles per us\n",
+                    delay_decrement);
 #endif /* WIN32NATIVE */
 }
 
@@ -271,7 +267,7 @@ int bitbang_tpi_rx(PROGRAMMER * pgm)
       break;
   }
   if (b != 0) {
-    fprintf(stderr, "bitbang_tpi_rx: start bit not received correctly\n");
+    avrdude_message("bitbang_tpi_rx: start bit not received correctly\n");
     return -1;
   }
 
@@ -286,7 +282,7 @@ int bitbang_tpi_rx(PROGRAMMER * pgm)
 
   /* parity bit */
   if (bitbang_tpi_clk(pgm) != parity) {
-    fprintf(stderr, "bitbang_tpi_rx: parity bit is wrong\n");
+    avrdude_message("bitbang_tpi_rx: parity bit is wrong\n");
     return -1;
   }
 
@@ -295,7 +291,7 @@ int bitbang_tpi_rx(PROGRAMMER * pgm)
   b &= bitbang_tpi_clk(pgm);
   b &= bitbang_tpi_clk(pgm);
   if (b != 1) {
-    fprintf(stderr, "bitbang_tpi_rx: stop bits not received correctly\n");
+    avrdude_message("bitbang_tpi_rx: stop bits not received correctly\n");
     return -1;
   }
   
@@ -342,15 +338,15 @@ int bitbang_cmd(PROGRAMMER * pgm, const unsigned char *cmd,
 
     if(verbose >= 2)
 	{
-        fprintf(stderr, "bitbang_cmd(): [ ");
+        avrdude_message("bitbang_cmd(): [ ");
         for(i = 0; i < 4; i++)
-            fprintf(stderr, "%02X ", cmd[i]);
-        fprintf(stderr, "] [ ");
+            avrdude_message("%02X ", cmd[i]);
+        avrdude_message("] [ ");
         for(i = 0; i < 4; i++)
 		{
-            fprintf(stderr, "%02X ", res[i]);
+            avrdude_message("%02X ", res[i]);
 		}
-        fprintf(stderr, "]\n");
+        avrdude_message("]\n");
 	}
 
   return 0;
@@ -377,15 +373,15 @@ int bitbang_cmd_tpi(PROGRAMMER * pgm, const unsigned char *cmd,
 
   if(verbose >= 2)
   {
-    fprintf(stderr, "bitbang_cmd_tpi(): [ ");
+    avrdude_message("bitbang_cmd_tpi(): [ ");
     for(i = 0; i < cmd_len; i++)
-      fprintf(stderr, "%02X ", cmd[i]);
-    fprintf(stderr, "] [ ");
+      avrdude_message("%02X ", cmd[i]);
+    avrdude_message("] [ ");
     for(i = 0; i < res_len; i++)
     {
-      fprintf(stderr, "%02X ", res[i]);
+      avrdude_message("%02X ", res[i]);
     }
-    fprintf(stderr, "]\n");
+    avrdude_message("]\n");
   }
 
   pgm->pgm_led(pgm, OFF);
@@ -413,15 +409,15 @@ int bitbang_spi(PROGRAMMER * pgm, const unsigned char *cmd,
 
   if(verbose >= 2)
 	{
-        fprintf(stderr, "bitbang_cmd(): [ ");
+        avrdude_message("bitbang_cmd(): [ ");
         for(i = 0; i < count; i++)
-            fprintf(stderr, "%02X ", cmd[i]);
-        fprintf(stderr, "] [ ");
+            avrdude_message("%02X ", cmd[i]);
+        avrdude_message("] [ ");
         for(i = 0; i < count; i++)
 		{
-            fprintf(stderr, "%02X ", res[i]);
+            avrdude_message("%02X ", res[i]);
 		}
-        fprintf(stderr, "]\n");
+        avrdude_message("]\n");
 	}
 
   return 0;
@@ -449,7 +445,7 @@ int bitbang_chip_erase(PROGRAMMER * pgm, AVRPART * p)
     /* Set Pointer Register */
     mem = avr_locate_mem(p, "flash");
     if (mem == NULL) {
-      fprintf(stderr, "No flash memory to erase for part %s\n",
+      avrdude_message("No flash memory to erase for part %s\n",
           p->desc);
       return -1;
     }
@@ -470,7 +466,7 @@ int bitbang_chip_erase(PROGRAMMER * pgm, AVRPART * p)
   }
 
   if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
-    fprintf(stderr, "chip erase instruction not defined for part \"%s\"\n",
+    avrdude_message("chip erase instruction not defined for part \"%s\"\n",
             p->desc);
     return -1;
   }
@@ -511,7 +507,7 @@ int bitbang_program_enable(PROGRAMMER * pgm, AVRPART * p)
   }
 
   if (p->op[AVR_OP_PGM_ENABLE] == NULL) {
-    fprintf(stderr, "program enable instruction not defined for part \"%s\"\n",
+    avrdude_message("program enable instruction not defined for part \"%s\"\n",
             p->desc);
     return -1;
   }
@@ -544,7 +540,7 @@ int bitbang_initialize(PROGRAMMER * pgm, AVRPART * p)
   if (p->flags & AVRPART_HAS_TPI) {
     /* make sure cmd_tpi() is defined */
     if (pgm->cmd_tpi == NULL) {
-      fprintf(stderr, "%s: Error: %s programmer does not support TPI\n",
+      avrdude_message("%s: Error: %s programmer does not support TPI\n",
           progname, pgm->type);
       return -1;
     }
@@ -554,21 +550,21 @@ int bitbang_initialize(PROGRAMMER * pgm, AVRPART * p)
 	usleep(1000);
 
     if (verbose >= 2)
-      fprintf(stderr, "doing MOSI-MISO link check\n");
+      avrdude_message("doing MOSI-MISO link check\n");
 
     pgm->setpin(pgm, PIN_AVR_MOSI, 0);
     if (pgm->getpin(pgm, PIN_AVR_MISO) != 0) {
-      fprintf(stderr, "MOSI->MISO 0 failed\n");
+      avrdude_message("MOSI->MISO 0 failed\n");
       return -1;
     }
     pgm->setpin(pgm, PIN_AVR_MOSI, 1);
     if (pgm->getpin(pgm, PIN_AVR_MISO) != 1) {
-      fprintf(stderr, "MOSI->MISO 1 failed\n");
+      avrdude_message("MOSI->MISO 1 failed\n");
       return -1;
     }
 
     if (verbose >= 2)
-      fprintf(stderr, "MOSI-MISO link present\n");
+      avrdude_message("MOSI-MISO link present\n");
   }
 
   pgm->setpin(pgm, PIN_AVR_SCK, 0);
@@ -589,7 +585,7 @@ int bitbang_initialize(PROGRAMMER * pgm, AVRPART * p)
     bitbang_tpi_tx(pgm, TPI_CMD_SLDCS | TPI_REG_TPIIR);
     rc = bitbang_tpi_rx(pgm);
     if (rc != 0x80) {
-      fprintf(stderr, "TPIIR not correct\n");
+      avrdude_message("TPIIR not correct\n");
       return -1;
     }
   } else {
@@ -623,7 +619,7 @@ int bitbang_initialize(PROGRAMMER * pgm, AVRPART * p)
      * can't sync with the device, maybe it's not attached?
      */
     if (rc) {
-      fprintf(stderr, "%s: AVR device not responding\n", progname);
+      avrdude_message("%s: AVR device not responding\n", progname);
       return -1;
     }
   }
@@ -634,7 +630,7 @@ int bitbang_initialize(PROGRAMMER * pgm, AVRPART * p)
 static int verify_pin_assigned(PROGRAMMER * pgm, int pin, char * desc)
 {
   if (pgm->pinno[pin] == 0) {
-    fprintf(stderr, "%s: error: no pin has been assigned for %s\n",
+    avrdude_message("%s: error: no pin has been assigned for %s\n",
             progname, desc);
     return -1;
   }
@@ -658,7 +654,7 @@ int bitbang_check_prerequisites(PROGRAMMER *pgm)
     return -1;
 
   if (pgm->cmd == NULL) {
-    fprintf(stderr, "%s: error: no cmd() method defined for bitbang programmer\n",
+    avrdude_message("%s: error: no cmd() method defined for bitbang programmer\n",
             progname);
     return -1;
   }
diff --git a/buspirate.c b/buspirate.c
index a65cf334..bfdd1e32 100644
--- a/buspirate.c
+++ b/buspirate.c
@@ -98,15 +98,15 @@ static void dump_mem(char *buf, size_t len)
 
 	for (i = 0; i<len; i++) {
 		if (i % 8 == 0)
-			fprintf(stderr, "\t");
-		fprintf(stderr, "0x%02x ", (unsigned)buf[i] & 0xFF);
+			avrdude_message("\t");
+		avrdude_message("0x%02x ", (unsigned)buf[i] & 0xFF);
 		if (i % 8 == 3)
-			fprintf(stderr, "  ");
+			avrdude_message("  ");
 		else if (i % 8 == 7)
-			fprintf(stderr, "\n");
+			avrdude_message("\n");
 	}
 	if (i % 8 != 7)
-		fprintf(stderr, "\n");
+		avrdude_message("\n");
 }
 
 static int buspirate_send_bin(struct programmer_t *pgm, char *data, size_t len)
@@ -114,7 +114,7 @@ static int buspirate_send_bin(struct programmer_t *pgm, char *data, size_t len)
 	int rc;
 
 	if (verbose > 1) {
-		fprintf(stderr, "%s: buspirate_send_bin():\n", progname);
+		avrdude_message("%s: buspirate_send_bin():\n", progname);
 		dump_mem(data, len);
 	}
 
@@ -131,7 +131,7 @@ static int buspirate_recv_bin(struct programmer_t *pgm, char *buf, size_t len)
 	if (rc < 0)
 		return EOF;
 	if (verbose > 1) {
-		fprintf(stderr, "%s: buspirate_recv_bin():\n", progname);
+		avrdude_message("%s: buspirate_recv_bin():\n", progname);
 		dump_mem(buf, len);
 	}
 
@@ -144,7 +144,7 @@ static int buspirate_expect_bin(struct programmer_t *pgm,
 {
 	char *recv_buf = alloca(expect_len);
 	if (!pgm->flag & BP_FLAG_IN_BINMODE) {
-		fprintf(stderr, "BusPirate: Internal error: buspirate_send_bin() called from ascii mode");
+		avrdude_message("BusPirate: Internal error: buspirate_send_bin() called from ascii mode");
 		return -1;
 	}
 
@@ -169,7 +169,7 @@ static int buspirate_getc(struct programmer_t *pgm)
 	unsigned char ch = 0;
 
 	if (pgm->flag & BP_FLAG_IN_BINMODE) {
-		fprintf(stderr, "BusPirate: Internal error: buspirate_getc() called from binmode");
+		avrdude_message("BusPirate: Internal error: buspirate_getc() called from binmode");
 		return EOF;
 	}
 
@@ -208,7 +208,7 @@ static char *buspirate_readline_noexit(struct programmer_t *pgm, char *buf, size
 	}
 	serial_recv_timeout = orig_serial_recv_timeout;
 	if (verbose)
-		fprintf(stderr, "%s: buspirate_readline(): %s%s",
+		avrdude_message("%s: buspirate_readline(): %s%s",
 			progname, buf,
 			buf[strlen(buf) - 1] == '\n' ? "" : "\n");
 	if (! buf[0])
@@ -223,9 +223,8 @@ static char *buspirate_readline(struct programmer_t *pgm, char *buf, size_t len)
 
 	ret = buspirate_readline_noexit(pgm, buf, len);
 	if (! ret) {
-		fprintf(stderr,
-			"%s: buspirate_readline(): programmer is not responding\n",
-			progname);
+		avrdude_message("%s: buspirate_readline(): programmer is not responding\n",
+                                progname);
 		return NULL;
 	}
 	return ret;
@@ -235,10 +234,10 @@ static int buspirate_send(struct programmer_t *pgm, char *str)
 	int rc;
 
 	if (verbose)
-		fprintf(stderr, "%s: buspirate_send(): %s", progname, str);
+		avrdude_message("%s: buspirate_send(): %s", progname, str);
 
 	if (pgm->flag & BP_FLAG_IN_BINMODE) {
-		fprintf(stderr, "BusPirate: Internal error: buspirate_send() called from binmode");
+		avrdude_message("BusPirate: Internal error: buspirate_send() called from binmode");
 		return -1;
 	}
 
@@ -311,8 +310,8 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 		}
 		if (sscanf(extended_param, "spifreq=%d", &spifreq) == 1) {
 			if (spifreq & (~0x07)) {
-				fprintf(stderr, "BusPirate: spifreq must be between 0 and 7.\n");
-				fprintf(stderr, "BusPirate: see BusPirate manual for details.\n");
+				avrdude_message("BusPirate: spifreq must be between 0 and 7.\n");
+				avrdude_message("BusPirate: see BusPirate manual for details.\n");
 				return -1;
 			}
 			pgm->flag = (pgm->flag & ~BP_FLAG_XPARM_RAWFREQ) |
@@ -324,7 +323,7 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 		unsigned rawfreq;
 		if (sscanf(extended_param, "rawfreq=%u", &rawfreq) == 1) {
 			if (rawfreq >= 4) {
-				fprintf(stderr, "BusPirate: rawfreq must be "
+				avrdude_message("BusPirate: rawfreq must be "
 					"between 0 and 3.\n");
 				return -1;
 			}
@@ -337,8 +336,8 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 		if (sscanf(extended_param, "cpufreq=%d", &cpufreq) == 1) {
 			/* lower limit comes from 'cpufreq > 4 * spifreq', spifreq in ascii mode is 30kHz. */
 			if (cpufreq < 125 || cpufreq > 4000) {
-				fprintf(stderr, "BusPirate: cpufreq must be between 125 and 4000 kHz.\n");
-				fprintf(stderr, "BusPirate: see BusPirate manual for details.\n");
+				avrdude_message("BusPirate: cpufreq must be between 125 and 4000 kHz.\n");
+				avrdude_message("BusPirate: see BusPirate manual for details.\n");
 				return -1;
 			}
 			PDATA(pgm)->cpufreq = cpufreq;
@@ -357,7 +356,7 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 				else if (strcasecmp(resetpin, "aux2") == 0)
 					PDATA(pgm)->reset |= BP_RESET_AUX2;
 				else {
-					fprintf(stderr, "BusPirate: reset must be either CS or AUX.\n");
+					avrdude_message("BusPirate: reset must be either CS or AUX.\n");
 					return -1;
 				}
 			}
@@ -376,7 +375,7 @@ buspirate_parseextparms(struct programmer_t *pgm, LISTID extparms)
 		}
 		if (sscanf(extended_param, "serial_recv_timeout=%d", &serial_recv_timeout) == 1) {
 			if (serial_recv_timeout < 1) {
-				fprintf(stderr, "BusPirate: serial_recv_timeout must be greater 0.\n");
+				avrdude_message("BusPirate: serial_recv_timeout must be greater 0.\n");
 				return -1;
 			}
 			PDATA(pgm)->serial_recv_timeout = serial_recv_timeout;
@@ -395,18 +394,18 @@ buspirate_verifyconfig(struct programmer_t *pgm)
 		PDATA(pgm)->reset |= BP_RESET_CS;
 
 	if ((PDATA(pgm)->reset != BP_RESET_CS) && buspirate_uses_ascii(pgm)) {
-		fprintf(stderr, "BusPirate: RESET pin other than CS is not supported in ASCII mode\n");
+		avrdude_message("BusPirate: RESET pin other than CS is not supported in ASCII mode\n");
 		return -1;
 	}
 
 	if (( (pgm->flag & BP_FLAG_XPARM_SPIFREQ) ||
 	(pgm->flag & BP_FLAG_XPARM_RAWFREQ) ) && buspirate_uses_ascii(pgm)) {
-		fprintf(stderr, "BusPirate: SPI speed selection is not supported in ASCII mode\n");
+		avrdude_message("BusPirate: SPI speed selection is not supported in ASCII mode\n");
 		return -1;
 	}
 
 	if ((pgm->flag & BP_FLAG_XPARM_CPUFREQ) && !buspirate_uses_ascii(pgm)) {
-		fprintf(stderr, "BusPirate: Setting cpufreq is only supported in ASCII mode\n");
+		avrdude_message("BusPirate: Setting cpufreq is only supported in ASCII mode\n");
 		return -1;
 	}
 
@@ -465,12 +464,12 @@ static void buspirate_reset_from_binmode(struct programmer_t *pgm)
 	}
 
 	if (pgm->flag & BP_FLAG_IN_BINMODE) {
-		fprintf(stderr, "BusPirate reset failed. You may need to powercycle it.\n");
+		avrdude_message("BusPirate reset failed. You may need to powercycle it.\n");
 		return;
 	}
 
 	if (verbose)
-		fprintf(stderr, "BusPirate is back in the text mode\n");
+		avrdude_message("BusPirate is back in the text mode\n");
 }
 
 static int buspirate_start_mode_bin(struct programmer_t *pgm)
@@ -515,12 +514,12 @@ static int buspirate_start_mode_bin(struct programmer_t *pgm)
 	memset(buf, 0, sizeof(buf));
 	buspirate_recv_bin(pgm, buf, 5);
 	if (sscanf(buf, "BBIO%d", &PDATA(pgm)->binmode_version) != 1) {
-		fprintf(stderr, "Binary mode not confirmed: '%s'\n", buf);
+		avrdude_message("Binary mode not confirmed: '%s'\n", buf);
 		buspirate_reset_from_binmode(pgm);
 		return -1;
 	}
 	if (verbose)
-		fprintf(stderr, "BusPirate binmode version: %d\n",
+		avrdude_message("BusPirate binmode version: %d\n",
 			PDATA(pgm)->binmode_version);
 
 	pgm->flag |= BP_FLAG_IN_BINMODE;
@@ -532,18 +531,18 @@ static int buspirate_start_mode_bin(struct programmer_t *pgm)
 	buspirate_recv_bin(pgm, buf, 4);
 	if (sscanf(buf, submode->entered_format,
 	&PDATA(pgm)->submode_version) != 1) {
-		fprintf(stderr, "%s mode not confirmed: '%s'\n",
+		avrdude_message("%s mode not confirmed: '%s'\n",
 			submode->name, buf);
 		buspirate_reset_from_binmode(pgm);
 		return -1;
 	}
 	if (verbose)
-		fprintf(stderr, "BusPirate %s version: %d\n",
+		avrdude_message("BusPirate %s version: %d\n",
 			submode->name, PDATA(pgm)->submode_version);
 
 	if (pgm->flag & BP_FLAG_NOPAGEDWRITE) {
 		if (verbose)
-			fprintf(stderr, "%s: Paged flash write disabled.\n", progname);
+			avrdude_message("%s: Paged flash write disabled.\n", progname);
 		pgm->paged_write = NULL;
 	} else {
 		/* Check for write-then-read without !CS/CS and disable paged_write if absent: */
@@ -561,13 +560,13 @@ static int buspirate_start_mode_bin(struct programmer_t *pgm)
 			buspirate_send_bin(pgm, buf, 1);
 
 			if (verbose)
-				fprintf(stderr, "%s: Disabling paged flash write. (Need BusPirate firmware >=v5.10.)\n", progname);
+				avrdude_message("%s: Disabling paged flash write. (Need BusPirate firmware >=v5.10.)\n", progname);
 
 			/* Flush serial buffer: */
 			serial_drain(&pgm->fd, 0);
 		} else {
 			if (verbose)
-				fprintf(stderr, "%s: Paged flash write enabled.\n", progname);
+				avrdude_message("%s: Paged flash write enabled.\n", progname);
 		}
 	}
 
@@ -589,7 +588,7 @@ static int buspirate_start_mode_bin(struct programmer_t *pgm)
 	/* AVR Extended Commands - test for existence */
 	if (pgm->flag & BP_FLAG_NOPAGEDREAD) {
 		if (verbose)
-			fprintf(stderr, "%s: Paged flash read disabled.\n", progname);
+			avrdude_message("%s: Paged flash read disabled.\n", progname);
 		pgm->paged_load = NULL;
 	} else {
 		int rv = buspirate_expect_bin_byte(pgm, 0x06, 0x01);
@@ -600,12 +599,12 @@ static int buspirate_start_mode_bin(struct programmer_t *pgm)
 			buspirate_send_bin(pgm, buf, 1);
 			buspirate_recv_bin(pgm, buf, 3);
 			ver = buf[1] << 8 | buf[2];
-			if (verbose) fprintf(stderr, "AVR Extended Commands version %d\n", ver);
+			if (verbose) avrdude_message("AVR Extended Commands version %d\n", ver);
 		} else {
-			if (verbose) fprintf(stderr, "AVR Extended Commands not found.\n");
+			if (verbose) avrdude_message("AVR Extended Commands not found.\n");
 			pgm->flag |= BP_FLAG_NOPAGEDREAD;
 			pgm->paged_load = NULL;
-		}		
+		}
 	}
 
 	return 0;
@@ -628,10 +627,9 @@ static int buspirate_start_spi_mode_ascii(struct programmer_t *pgm)
 			break;
 	}
 	if (spi_cmd == -1) {
-		fprintf(stderr,
-				"%s: SPI mode number not found. Does your BusPirate support SPI?\n",
+		avrdude_message("%s: SPI mode number not found. Does your BusPirate support SPI?\n",
 				progname);
-		fprintf(stderr, "%s: Try powercycling your BusPirate and try again.\n",
+		avrdude_message("%s: Try powercycling your BusPirate and try again.\n",
 				progname);
 		return -1;
 	}
@@ -649,7 +647,7 @@ static int buspirate_start_spi_mode_ascii(struct programmer_t *pgm)
 		}
 		if (buspirate_is_prompt(rcvd)) {
 			if (strncmp(rcvd, "SPI>", 4) == 0) {
-				if (verbose) fprintf(stderr, "BusPirate is now configured for SPI\n");
+				if (verbose) avrdude_message("BusPirate is now configured for SPI\n");
 				break;
 			}
 			/* Not yet 'SPI>' prompt */
@@ -676,7 +674,7 @@ static void buspirate_enable(struct programmer_t *pgm)
 
 	/* Attempt to start binary SPI mode unless explicitly told otherwise: */
 	if (!buspirate_uses_ascii(pgm)) {
-		fprintf(stderr, "Attempting to initiate BusPirate binary mode...\n");
+		avrdude_message("Attempting to initiate BusPirate binary mode...\n");
 
 		/* Send two CRs to ensure we're not in a sub-menu of the UI if we're in ASCII mode: */
 		buspirate_send_bin(pgm, "\n\n", 2);
@@ -688,23 +686,23 @@ static void buspirate_enable(struct programmer_t *pgm)
 		if (buspirate_start_mode_bin(pgm) >= 0)
 			return;
 		else
-			fprintf(stderr, "%s: Failed to start binary mode, falling back to ASCII...\n", progname);
+			avrdude_message("%s: Failed to start binary mode, falling back to ASCII...\n", progname);
 	}
 
-	fprintf(stderr, "Attempting to initiate BusPirate ASCII mode...\n");
+	avrdude_message("Attempting to initiate BusPirate ASCII mode...\n");
 
 	/* Call buspirate_send_bin() instead of buspirate_send() 
 	 * because we don't know if BP is in text or bin mode */
 	rc = buspirate_send_bin(pgm, reset_str, strlen(reset_str));
 	if (rc) {
-		fprintf(stderr, "BusPirate is not responding. Serial port error: %d\n", rc);
+		avrdude_message("BusPirate is not responding. Serial port error: %d\n", rc);
 		return;
 	}
 
 	while(1) {
 		rcvd = buspirate_readline_noexit(pgm, NULL, 0);
 		if (! rcvd) {
-			fprintf(stderr, "%s: Fatal: Programmer is not responding.\n", progname);
+			avrdude_message("%s: Fatal: Programmer is not responding.\n", progname);
 			return;
 		}
 		if (strncmp(rcvd, "Are you sure?", 13) == 0) {
@@ -719,13 +717,13 @@ static void buspirate_enable(struct programmer_t *pgm)
 			break;
 		}
 		if (print_banner)
-			fprintf(stderr, "**  %s", rcvd);
+			avrdude_message("**  %s", rcvd);
 	}
 
 	if (!(pgm->flag & BP_FLAG_IN_BINMODE)) {
-		fprintf(stderr, "BusPirate: using ASCII mode\n");
+		avrdude_message("BusPirate: using ASCII mode\n");
 		if (buspirate_start_spi_mode_ascii(pgm) < 0) {
-			fprintf(stderr, "%s: Failed to start ascii SPI mode\n", progname);
+			avrdude_message("%s: Failed to start ascii SPI mode\n", progname);
 			return;
 		}
 	}
@@ -766,15 +764,15 @@ static void buspirate_powerup(struct programmer_t *pgm)
 					}
 				}
 				if(!ok) {
-					fprintf(stderr, "%s: warning: did not get a response to start PWM command.\n", progname);
+					avrdude_message("%s: warning: did not get a response to start PWM command.\n", progname);
 				}
 			}
 			return;
 		}
 	}
 
-	fprintf(stderr, "%s: warning: did not get a response to PowerUp command.\n", progname);
-	fprintf(stderr, "%s: warning: Trying to continue anyway...\n", progname);
+	avrdude_message("%s: warning: did not get a response to PowerUp command.\n", progname);
+	avrdude_message("%s: warning: Trying to continue anyway...\n", progname);
 }
 
 static void buspirate_powerdown(struct programmer_t *pgm)
@@ -787,14 +785,14 @@ static void buspirate_powerdown(struct programmer_t *pgm)
 	} else {
 		if (pgm->flag & BP_FLAG_XPARM_CPUFREQ) {
 			if (!buspirate_expect(pgm, "g\n", "PWM disabled", 1)) {
-				fprintf(stderr, "%s: warning: did not get a response to stop PWM command.\n", progname);
+				avrdude_message("%s: warning: did not get a response to stop PWM command.\n", progname);
 			}
 		}
 		if (buspirate_expect(pgm, "w\n", "Power supplies OFF", 1))
 			return;
 	}
 
-	fprintf(stderr, "%s: warning: did not get a response to PowerDown command.\n", progname);
+	avrdude_message("%s: warning: did not get a response to PowerDown command.\n", progname);
 }
 
 static int buspirate_cmd_bin(struct programmer_t *pgm,
@@ -837,7 +835,7 @@ static int buspirate_cmd_ascii(struct programmer_t *pgm,
 	}
 
 	if (i != 4) {
-		fprintf(stderr, "%s: error: SPI has not read 4 bytes back\n", progname);
+		avrdude_message("%s: error: SPI has not read 4 bytes back\n", progname);
 		return -1;
 	}
 
@@ -871,17 +869,17 @@ static int buspirate_paged_load(
 	unsigned char buf[275];
 	unsigned int addr = 0;
 
-	if (verbose > 1) fprintf(stderr, "BusPirate: buspirate_paged_load(..,%s,%d,%d,%d)\n",m->desc,m->page_size,address,n_bytes);
+	if (verbose > 1) avrdude_message("BusPirate: buspirate_paged_load(..,%s,%d,%d,%d)\n",m->desc,m->page_size,address,n_bytes);
 
 	// This should never happen, but still...
 	if (pgm->flag & BP_FLAG_NOPAGEDREAD) {
-		fprintf(stderr, "BusPirate: buspirate_paged_load() called while in nopagedread mode!\n");
+		avrdude_message("BusPirate: buspirate_paged_load() called while in nopagedread mode!\n");
 		return -1;
 	}
 
 	// determine what type of memory to read, only flash is supported
 	if (strcmp(m->desc, "flash") != 0) {
-		return -1;	
+		return -1;      
 	}
 
 	// send command to read data
@@ -904,11 +902,11 @@ static int buspirate_paged_load(
 	buspirate_recv_bin(pgm, buf, 1);
 
 	if (buf[0] != 0x01) {
-		fprintf(stderr, "BusPirate: Paged Read command returned zero.\n");
+		avrdude_message("BusPirate: Paged Read command returned zero.\n");
 		return -1;
 	}
 
-	for (addr = 0; addr < n_bytes; addr++) {	
+	for (addr = 0; addr < n_bytes; addr++) {        
 		buspirate_recv_bin(pgm, &m->buf[addr+address], 1);
 	}
 
@@ -951,15 +949,13 @@ static int buspirate_paged_write(struct programmer_t *pgm,
 
 	/* pre-check opcodes */
 	if (m->op[AVR_OP_LOADPAGE_LO] == NULL) {
-		fprintf(stderr,
-			"%s failure: %s command not defined for %s\n",
-			progname, "AVR_OP_LOADPAGE_LO", p->desc);
+		avrdude_message("%s failure: %s command not defined for %s\n",
+                                progname, "AVR_OP_LOADPAGE_LO", p->desc);
 		return -1;
 	}
 	if (m->op[AVR_OP_LOADPAGE_HI] == NULL) {
-		fprintf(stderr,
-			"%s failure: %s command not defined for %s\n",
-			progname, "AVR_OP_LOADPAGE_HI", p->desc);
+		avrdude_message("%s failure: %s command not defined for %s\n",
+                                progname, "AVR_OP_LOADPAGE_HI", p->desc);
 		return -1;
 	}
 
@@ -1019,7 +1015,7 @@ static int buspirate_paged_write(struct programmer_t *pgm,
 
 		/* Check for write failure: */
 		if ((buspirate_recv_bin(pgm, &recv_byte, 1) == EOF) || (recv_byte != 0x01)) {
-			fprintf(stderr, "BusPirate: Fatal error: Write Then Read did not succeed.\n");
+			avrdude_message("BusPirate: Fatal error: Write Then Read did not succeed.\n");
 			pgm->pgm_led(pgm, OFF);
 			pgm->err_led(pgm, ON);
 			return -1;
@@ -1050,9 +1046,8 @@ static int buspirate_program_enable(struct programmer_t *pgm, AVRPART * p)
 		buspirate_expect(pgm, "{\n", "CS ENABLED", 1);
 
 	if (p->op[AVR_OP_PGM_ENABLE] == NULL) {
-		fprintf(stderr,
-			"program enable instruction not defined for part \"%s\"\n",
-			p->desc);
+		avrdude_message("program enable instruction not defined for part \"%s\"\n",
+                                p->desc);
 		return -1;
 	}
 
@@ -1072,9 +1067,8 @@ static int buspirate_chip_erase(struct programmer_t *pgm, AVRPART * p)
 	unsigned char res[4];
 
 	if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
-		fprintf(stderr,
-			"chip erase instruction not defined for part \"%s\"\n",
-			p->desc);
+		avrdude_message("chip erase instruction not defined for part \"%s\"\n",
+                                p->desc);
 		return -1;
 	}
 
@@ -1097,7 +1091,7 @@ static void buspirate_setup(struct programmer_t *pgm)
 {
 	/* Allocate private data */
 	if ((pgm->cookie = calloc(1, sizeof(struct pdata))) == 0) {
-		fprintf(stderr, "%s: buspirate_initpgm(): Out of memory allocating private data\n",
+		avrdude_message("%s: buspirate_initpgm(): Out of memory allocating private data\n",
 			progname);
 		exit(1);
 	}
@@ -1151,7 +1145,7 @@ static void buspirate_bb_enable(struct programmer_t *pgm)
 	if (bitbang_check_prerequisites(pgm) < 0)
 	    return;             /* XXX should treat as error */
 
-	fprintf(stderr, "Attempting to initiate BusPirate bitbang binary mode...\n");
+	avrdude_message("Attempting to initiate BusPirate bitbang binary mode...\n");
 
 	/* Send two CRs to ensure we're not in a sub-menu of the UI if we're in ASCII mode: */
 	buspirate_send_bin(pgm, "\n\n", 2);
@@ -1166,11 +1160,11 @@ static void buspirate_bb_enable(struct programmer_t *pgm)
 	memset(buf, 0, sizeof(buf));
 	buspirate_recv_bin(pgm, buf, 5);
 	if (sscanf(buf, "BBIO%d", &PDATA(pgm)->binmode_version) != 1) {
-		fprintf(stderr, "Binary mode not confirmed: '%s'\n", buf);
+		avrdude_message("Binary mode not confirmed: '%s'\n", buf);
 		buspirate_reset_from_binmode(pgm);
 		return;
 	}
-	fprintf(stderr, "BusPirate binmode version: %d\n",
+	avrdude_message("BusPirate binmode version: %d\n",
 		PDATA(pgm)->binmode_version);
 
 	pgm->flag |= BP_FLAG_IN_BINMODE;
diff --git a/butterfly.c b/butterfly.c
index 3d4d6d37..9217efcb 100644
--- a/butterfly.c
+++ b/butterfly.c
@@ -64,9 +64,8 @@ struct pdata
 static void butterfly_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: butterfly_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: butterfly_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -89,9 +88,8 @@ static int butterfly_recv(PROGRAMMER * pgm, char * buf, size_t len)
 
   rv = serial_recv(&pgm->fd, (unsigned char *)buf, len);
   if (rv < 0) {
-    fprintf(stderr,
-	    "%s: butterfly_recv(): programmer is not responding\n",
-	    progname);
+    avrdude_message("%s: butterfly_recv(): programmer is not responding\n",
+                    progname);
     return -1;
   }
   return 0;
@@ -110,7 +108,7 @@ static int butterfly_vfy_cmd_sent(PROGRAMMER * pgm, char * errmsg)
 
   butterfly_recv(pgm, &c, 1);
   if (c != '\r') {
-    fprintf(stderr, "%s: error: programmer did not respond to command: %s\n",
+    avrdude_message("%s: error: programmer did not respond to command: %s\n",
             progname, errmsg);
     return -1;
   }
@@ -225,7 +223,7 @@ static int butterfly_initialize(PROGRAMMER * pgm, AVRPART * p)
    * Send some ESC to activate butterfly bootloader.  This is not needed
    * for plain avr109 bootloaders but does not harm there either.
    */
-  fprintf(stderr, "Connecting to programmer: ");
+  avrdude_message("Connecting to programmer: ");
   if (pgm->flag & IS_BUTTERFLY_MK)
     {
       char mk_reset_cmd[6] = {"#aR@S\r"};
@@ -247,9 +245,9 @@ static int butterfly_initialize(PROGRAMMER * pgm, AVRPART * p)
 	} while (mk_timeout++ < 10);
 
       butterfly_recv(pgm, &c, 1);
-      if ( c != 'M' && c != '?') 
-        { 
-          fprintf(stderr, "\nConnection FAILED.");
+      if ( c != 'M' && c != '?')
+        {
+          avrdude_message("\nConnection FAILED.");
           return -1;
         }
       else
@@ -296,12 +294,12 @@ static int butterfly_initialize(PROGRAMMER * pgm, AVRPART * p)
   butterfly_send(pgm, "p", 1);
   butterfly_recv(pgm, &type, 1);
 
-  fprintf(stderr, "Found programmer: Id = \"%s\"; type = %c\n", id, type);
-  fprintf(stderr, "    Software Version = %c.%c; ", sw[0], sw[1]);
+  avrdude_message("Found programmer: Id = \"%s\"; type = %c\n", id, type);
+  avrdude_message("    Software Version = %c.%c; ", sw[0], sw[1]);
   if (hw[0]=='?') {
-    fprintf(stderr, "No Hardware Version given.\n");
+    avrdude_message("No Hardware Version given.\n");
   } else {
-    fprintf(stderr, "Hardware Version = %c.%c\n", hw[0], hw[1]);
+    avrdude_message("Hardware Version = %c.%c\n", hw[0], hw[1]);
   };
 
   /* See if programmer supports autoincrement of address. */
@@ -309,30 +307,28 @@ static int butterfly_initialize(PROGRAMMER * pgm, AVRPART * p)
   butterfly_send(pgm, "a", 1);
   butterfly_recv(pgm, &PDATA(pgm)->has_auto_incr_addr, 1);
   if (PDATA(pgm)->has_auto_incr_addr == 'Y')
-      fprintf(stderr, "Programmer supports auto addr increment.\n");
+      avrdude_message("Programmer supports auto addr increment.\n");
 
   /* Check support for buffered memory access, abort if not available */
 
   butterfly_send(pgm, "b", 1);
   butterfly_recv(pgm, &c, 1);
   if (c != 'Y') {
-    fprintf(stderr,
-            "%s: error: buffered memory access not supported. Maybe it isn't\n"\
-            "a butterfly/AVR109 but a AVR910 device?\n", progname);
+    avrdude_message("%s: error: buffered memory access not supported. Maybe it isn't\n"\
+                    "a butterfly/AVR109 but a AVR910 device?\n", progname);
     return -1;
   };
   butterfly_recv(pgm, &c, 1);
   PDATA(pgm)->buffersize = (unsigned int)(unsigned char)c<<8;
   butterfly_recv(pgm, &c, 1);
   PDATA(pgm)->buffersize += (unsigned int)(unsigned char)c;
-  fprintf(stderr,
-    "Programmer supports buffered memory access with buffersize=%i bytes.\n",
-     PDATA(pgm)->buffersize);
+  avrdude_message("Programmer supports buffered memory access with buffersize=%i bytes.\n",
+                  PDATA(pgm)->buffersize);
 
   /* Get list of devices that the programmer supports. */
 
   butterfly_send(pgm, "t", 1);
-  fprintf(stderr, "\nProgrammer supports the following devices:\n");
+  avrdude_message("\nProgrammer supports the following devices:\n");
   devtype_1st = 0;
   while (1) {
     butterfly_recv(pgm, &c, 1);
@@ -341,9 +337,9 @@ static int butterfly_initialize(PROGRAMMER * pgm, AVRPART * p)
 
     if (c == 0)
       break;
-    fprintf(stderr, "    Device code: 0x%02x\n", (unsigned int)(unsigned char)c);
+    avrdude_message("    Device code: 0x%02x\n", (unsigned int)(unsigned char)c);
   };
-  fprintf(stderr,"\n");
+  avrdude_message("\n");
 
   /* Tell the programmer which part we selected.
      According to the AVR109 code, this is ignored by the bootloader.  As
@@ -361,9 +357,8 @@ static int butterfly_initialize(PROGRAMMER * pgm, AVRPART * p)
       return -1;
 
   if (verbose)
-    fprintf(stderr,
-	    "%s: devcode selected: 0x%02x\n",
-	    progname, (unsigned)buf[1]);
+    avrdude_message("%s: devcode selected: 0x%02x\n",
+                    progname, (unsigned)buf[1]);
 
   butterfly_enter_prog_mode(pgm);
   butterfly_drain(pgm, 0);
@@ -556,9 +551,8 @@ static int butterfly_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m, unsig
     return -1;            /* not supported */
   if (strcmp(m->desc, "eeprom") == 0)
     return 0;             /* nothing to do */
-  fprintf(stderr,
-          "%s: butterfly_page_erase() called on memory type \"%s\"\n",
-          progname, m->desc);
+  avrdude_message("%s: butterfly_page_erase() called on memory type \"%s\"\n",
+                  progname, m->desc);
   return -1;
 }
 
@@ -608,7 +602,7 @@ static int butterfly_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   int use_ext_addr = m->op[AVR_OP_LOAD_EXT_ADDR] != NULL;
   unsigned int wr_size = 2;
 
-  if (strcmp(m->desc, "flash") && strcmp(m->desc, "eeprom")) 
+  if (strcmp(m->desc, "flash") && strcmp(m->desc, "eeprom"))
     return -2;
 
   if (m->desc[0] == 'e')
@@ -663,7 +657,7 @@ static int butterfly_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   int use_ext_addr = m->op[AVR_OP_LOAD_EXT_ADDR] != NULL;
 
   /* check parameter syntax: only "flash" or "eeprom" is allowed */
-  if (strcmp(m->desc, "flash") && strcmp(m->desc, "eeprom")) 
+  if (strcmp(m->desc, "flash") && strcmp(m->desc, "eeprom"))
     return -2;
 
   if (m->desc[0] == 'e')
@@ -704,7 +698,7 @@ static int butterfly_read_sig_bytes(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m)
   unsigned char tmp;
 
   if (m->size < 3) {
-    fprintf(stderr, "%s: memsize too small for sig byte read", progname);
+    avrdude_message("%s: memsize too small for sig byte read", progname);
     return -1;
   }
 
diff --git a/config.c b/config.c
index 961eab1d..193c0b02 100644
--- a/config.c
+++ b/config.c
@@ -93,7 +93,7 @@ TOKEN * new_token(int primary)
 
   tkn = (TOKEN *)malloc(sizeof(TOKEN));
   if (tkn == NULL) {
-    fprintf(stderr, "new_token(): out of memory\n");
+    avrdude_message("new_token(): out of memory\n");
     exit(1);
   }
 
@@ -145,7 +145,7 @@ TOKEN * number(char * text)
   tkn->value.number = atoi(text);
 
 #if DEBUG
-  fprintf(stderr, "NUMBER(%d)\n", tkn->value.number);
+  avrdude_message("NUMBER(%d)\n", tkn->value.number);
 #endif
 
   return tkn;
@@ -160,7 +160,7 @@ TOKEN * number_real(char * text)
   tkn->value.number_real = atof(text);
 
 #if DEBUG
-  fprintf(stderr, "NUMBER(%g)\n", tkn->value.number_real);
+  avrdude_message("NUMBER(%g)\n", tkn->value.number_real);
 #endif
 
   return tkn;
@@ -175,12 +175,12 @@ TOKEN * hexnumber(char * text)
   tkn->value.type   = V_NUM;
   tkn->value.number = strtoul(text, &e, 16);
   if ((e == text) || (*e != 0)) {
-    fprintf(stderr, "error at %s:%d: can't scan hex number \"%s\"\n",
+    avrdude_message("error at %s:%d: can't scan hex number \"%s\"\n",
             infile, lineno, text);
   }
   
 #if DEBUG
-  fprintf(stderr, "HEXNUMBER(%g)\n", tkn->value.number);
+  avrdude_message("HEXNUMBER(%g)\n", tkn->value.number);
 #endif
 
   return tkn;
@@ -199,13 +199,13 @@ TOKEN * string(char * text)
   tkn->value.type   = V_STR;
   tkn->value.string = (char *) malloc(len+1);
   if (tkn->value.string == NULL) {
-    fprintf(stderr, "id(): out of memory\n");
+    avrdude_message("id(): out of memory\n");
     exit(1);
   }
   strcpy(tkn->value.string, text);
 
 #if DEBUG
-  fprintf(stderr, "STRING(%s)\n", tkn->value.string);
+  avrdude_message("STRING(%s)\n", tkn->value.string);
 #endif
 
   return tkn;
@@ -227,33 +227,33 @@ void print_token(TOKEN * tkn)
   if (!tkn)
     return;
 
-  fprintf(stderr, "token = %d = ", tkn->primary);
+  avrdude_message("token = %d = ", tkn->primary);
   switch (tkn->value.type) {
     case V_NUM:
-      fprintf(stderr, "NUMBER, value=%d", tkn->value.number);
+      avrdude_message("NUMBER, value=%d", tkn->value.number);
       break;
 
     case V_NUM_REAL:
-      fprintf(stderr, "NUMBER, value=%g", tkn->value.number_real);
+      avrdude_message("NUMBER, value=%g", tkn->value.number_real);
       break;
 
     case V_STR:
-      fprintf(stderr, "STRING, value=%s", tkn->value.string);
+      avrdude_message("STRING, value=%s", tkn->value.string);
       break;
 
     default:
-      fprintf(stderr, "<other>");
+      avrdude_message("<other>");
       break;
   }
 
-  fprintf(stderr, "\n");
+  avrdude_message("\n");
 }
 
 
 void pyytext(void)
 {
 #if DEBUG
-  fprintf(stderr, "TOKEN: \"%s\"\n", yytext);
+  avrdude_message("TOKEN: \"%s\"\n", yytext);
 #endif
 }
 
@@ -264,7 +264,7 @@ char * dup_string(const char * str)
 
   s = strdup(str);
   if (s == NULL) {
-    fprintf(stderr, "dup_string(): out of memory\n");
+    avrdude_message("dup_string(): out of memory\n");
     exit(1);
   }
 
@@ -282,7 +282,7 @@ int read_config(const char * file)
 
   f = fopen(file, "r");
   if (f == NULL) {
-    fprintf(stderr, "%s: can't open config file \"%s\": %s\n",
+    avrdude_message("%s: can't open config file \"%s\": %s\n",
             progname, file, strerror(errno));
     return -1;
   }
diff --git a/config_gram.y b/config_gram.y
index 44f33716..900676e3 100644
--- a/config_gram.y
+++ b/config_gram.y
@@ -276,20 +276,19 @@ prog_def :
       PROGRAMMER * existing_prog;
       char * id;
       if (lsize(current_prog->id) == 0) {
-        fprintf(stderr,
-                "%s: error at %s:%d: required parameter id not specified\n",
+        avrdude_message("%s: error at %s:%d: required parameter id not specified\n",
                 progname, infile, lineno);
         exit(1);
       }
       if (current_prog->initpgm == NULL) {
-        fprintf(stderr, "%s: error at %s:%d: programmer type not specified\n",
+        avrdude_message("%s: error at %s:%d: programmer type not specified\n",
                 progname, infile, lineno);
         exit(1);
       }
       id = ldata(lfirst(current_prog->id));
       existing_prog = locate_programmer(programmers, id);
       if (existing_prog) {
-        fprintf(stderr, "%s: warning at %s:%d: programmer %s overwrites "
+        avrdude_message("%s: warning at %s:%d: programmer %s overwrites "
                 "previous definition %s:%d.\n",
                 progname, infile, current_prog->lineno,
                 id, existing_prog->config_file, existing_prog->lineno);
@@ -315,8 +314,7 @@ prog_decl :
     {
       struct programmer_t * pgm = locate_programmer(programmers, $3->value.string);
       if (pgm == NULL) {
-        fprintf(stderr,
-                "%s: error at %s:%d: parent programmer %s not found\n",
+        avrdude_message("%s: error at %s:%d: parent programmer %s not found\n",
                 progname, infile, lineno, $3->value.string);
         exit(1);
       }
@@ -336,8 +334,7 @@ part_def :
       AVRPART * existing_part;
 
       if (current_part->id[0] == 0) {
-        fprintf(stderr,
-                "%s: error at %s:%d: required parameter id not specified\n",
+        avrdude_message("%s: error at %s:%d: required parameter id not specified\n",
                 progname, infile, lineno);
         exit(1);
       }
@@ -351,22 +348,19 @@ part_def :
         m = ldata(ln);
         if (m->paged) {
           if (m->page_size == 0) {
-            fprintf(stderr, 
-                    "%s: error at %s:%d: must specify page_size for paged "
+            avrdude_message("%s: error at %s:%d: must specify page_size for paged "
                     "memory\n",
                     progname, infile, lineno);
             exit(1);
           }
           if (m->num_pages == 0) {
-            fprintf(stderr, 
-                    "%s: error at %s:%d: must specify num_pages for paged "
+            avrdude_message("%s: error at %s:%d: must specify num_pages for paged "
                     "memory\n",
                     progname, infile, lineno);
             exit(1);
           }
           if (m->size != m->page_size * m->num_pages) {
-            fprintf(stderr, 
-                    "%s: error at %s:%d: page size (%u) * num_pages (%u) = "
+            avrdude_message("%s: error at %s:%d: page size (%u) * num_pages (%u) = "
                     "%u does not match memory size (%u)\n",
                     progname, infile, lineno,
                     m->page_size, 
@@ -381,7 +375,7 @@ part_def :
 
       existing_part = locate_part(part_list, current_part->id);
       if (existing_part) {
-        fprintf(stderr, "%s: warning at %s:%d: part %s overwrites "
+        avrdude_message("%s: warning at %s:%d: part %s overwrites "
                 "previous definition %s:%d.\n",
                 progname, infile, current_part->lineno, current_part->id,
                 existing_part->config_file, existing_part->lineno);
@@ -404,8 +398,7 @@ part_decl :
     {
       AVRPART * parent_part = locate_part(part_list, $3->value.string);
       if (parent_part == NULL) {
-        fprintf(stderr, 
-              "%s: error at %s:%d: can't find parent part",
+        avrdude_message("%s: error at %s:%d: can't find parent part",
               progname, infile, lineno);
         exit(1);
       }
@@ -474,8 +467,7 @@ prog_parm_type_id:
   TKN_STRING        {
   const struct programmer_type_t * pgm_type = locate_programmer_type($1->value.string);
     if (pgm_type == NULL) {
-        fprintf(stderr,
-                "%s: error at %s:%d: programmer type %s not found\n",
+        avrdude_message("%s: error at %s:%d: programmer type %s not found\n",
                 progname, infile, lineno, $1->value.string);
         exit(1);
     }
@@ -484,8 +476,7 @@ prog_parm_type_id:
 }
   | error
 {
-        fprintf(stderr,
-                "%s: error at %s:%d: programmer type must be written as \"id_type\"\n",
+        avrdude_message("%s: error at %s:%d: programmer type must be written as \"id_type\"\n",
                 progname, infile, lineno);
         exit(1);
 }
@@ -657,8 +648,7 @@ part_parm :
 
   K_DEVICECODE TKN_EQUAL TKN_NUMBER {
     {
-      fprintf(stderr, 
-              "%s: error at %s:%d: devicecode is deprecated, use "
+      avrdude_message("%s: error at %s:%d: devicecode is deprecated, use "
               "stk500_devcode instead\n",
               progname, infile, lineno);
       exit(1);
@@ -723,8 +713,7 @@ part_parm :
       }
       if (!ok)
 	{
-	  fprintf(stderr,
-                  "%s: Warning: line %d of %s: "
+	  avrdude_message("%s: Warning: line %d of %s: "
 		  "too many bytes in control stack\n",
                   progname, lineno, infile);
         }
@@ -757,8 +746,7 @@ part_parm :
       }
       if (!ok)
 	{
-	  fprintf(stderr,
-                  "%s: Warning: line %d of %s: "
+	  avrdude_message("%s: Warning: line %d of %s: "
 		  "too many bytes in control stack\n",
                   progname, lineno, infile);
         }
@@ -790,8 +778,7 @@ part_parm :
       }
       if (!ok)
 	{
-	  fprintf(stderr,
-                  "%s: Warning: line %d of %s: "
+	  avrdude_message("%s: Warning: line %d of %s: "
 		  "too many bytes in flash instructions\n",
                   progname, lineno, infile);
         }
@@ -823,8 +810,7 @@ part_parm :
       }
       if (!ok)
 	{
-	  fprintf(stderr,
-                  "%s: Warning: line %d of %s: "
+	  avrdude_message("%s: Warning: line %d of %s: "
 		  "too many bytes in EEPROM instructions\n",
                   progname, lineno, infile);
         }
@@ -1230,8 +1216,7 @@ part_parm :
       op = avr_new_opcode();
       parse_cmdbits(op);
       if (current_part->op[opnum] != NULL) {
-        /*fprintf(stderr,
-              "%s: warning at %s:%d: operation redefined\n",
+        /*avrdude_message("%s: warning at %s:%d: operation redefined\n",
               progname, infile, lineno);*/
         avr_free_opcode(current_part->op[opnum]);
       }
@@ -1357,8 +1342,7 @@ mem_spec :
       op = avr_new_opcode();
       parse_cmdbits(op);
       if (current_mem->op[opnum] != NULL) {
-        /*fprintf(stderr,
-              "%s: warning at %s:%d: operation redefined\n",
+        /*avrdude_message("%s: warning at %s:%d: operation redefined\n",
               progname, infile, lineno);*/
         avr_free_opcode(current_mem->op[opnum]);
       }
@@ -1394,8 +1378,7 @@ static int assign_pin(int pinno, TOKEN * v, int invert)
   free_token(v);
 
   if ((value < PIN_MIN) || (value > PIN_MAX)) {
-    fprintf(stderr, 
-            "%s: error at line %d of %s: pin must be in the "
+    avrdude_message("%s: error at line %d of %s: pin must be in the "
             "range %d-%d\n",
             progname, lineno, infile, PIN_MIN, PIN_MAX);
     exit(1);
@@ -1416,8 +1399,7 @@ static int assign_pin_list(int invert)
     t = lrmv_n(number_list, 1);
     pin = t->value.number;
     if ((pin < PIN_MIN) || (pin > PIN_MAX)) {
-      fprintf(stderr, 
-            "%s: error at line %d of %s: pin must be in the "
+      avrdude_message("%s: error at line %d of %s: pin must be in the "
             "range %d-%d\n",
             progname, lineno, infile, PIN_MIN, PIN_MAX);
       exit(1);
@@ -1446,8 +1428,7 @@ static int which_opcode(TOKEN * opcode)
     case K_CHIP_ERASE  : return AVR_OP_CHIP_ERASE; break;
     case K_PGM_ENABLE  : return AVR_OP_PGM_ENABLE; break;
     default :
-      fprintf(stderr, 
-              "%s: error at %s:%d: invalid opcode\n",
+      avrdude_message("%s: error at %s:%d: invalid opcode\n",
               progname, infile, lineno);
       exit(1);
       break;
@@ -1475,8 +1456,7 @@ static int parse_cmdbits(OPCODE * op)
 
       bitno--;
       if (bitno < 0) {
-        fprintf(stderr, 
-                "%s: error at %s:%d: too many opcode bits for instruction\n",
+        avrdude_message("%s: error at %s:%d: too many opcode bits for instruction\n",
                 progname, infile, lineno);
         exit(1);
       }
@@ -1484,8 +1464,7 @@ static int parse_cmdbits(OPCODE * op)
       len = strlen(s);
 
       if (len == 0) {
-        fprintf(stderr, 
-                "%s: error at %s:%d: invalid bit specifier \"\"\n",
+        avrdude_message("%s: error at %s:%d: invalid bit specifier \"\"\n",
                 progname, infile, lineno);
         exit(1);
       }
@@ -1525,8 +1504,7 @@ static int parse_cmdbits(OPCODE * op)
             op->bit[bitno].bitno = bitno % 8;
             break;
           default :
-            fprintf(stderr, 
-                    "%s: error at %s:%d: invalid bit specifier '%c'\n",
+            avrdude_message("%s: error at %s:%d: invalid bit specifier '%c'\n",
                     progname, infile, lineno, ch);
             exit(1);
             break;
@@ -1537,8 +1515,7 @@ static int parse_cmdbits(OPCODE * op)
           q = &s[1];
           op->bit[bitno].bitno = strtol(q, &e, 0);
           if ((e == q)||(*e != 0)) {
-            fprintf(stderr, 
-                    "%s: error at %s:%d: can't parse bit number from \"%s\"\n",
+            avrdude_message("%s: error at %s:%d: can't parse bit number from \"%s\"\n",
                     progname, infile, lineno, q);
             exit(1);
           }
@@ -1546,8 +1523,7 @@ static int parse_cmdbits(OPCODE * op)
           op->bit[bitno].value = 0;
         }
         else {
-          fprintf(stderr, 
-                  "%s: error at %s:%d: invalid bit specifier \"%s\"\n",
+          avrdude_message("%s: error at %s:%d: invalid bit specifier \"%s\"\n",
                   progname, infile, lineno, s);
           exit(1);
         }
diff --git a/dfu.c b/dfu.c
index 75632f65..04ac6a28 100644
--- a/dfu.c
+++ b/dfu.c
@@ -37,7 +37,7 @@
 #ifndef HAVE_LIBUSB
 
 struct dfu_dev *dfu_open(char *port_name) {
-  fprintf(stderr, "%s: Error: No USB support in this compile of avrdude\n",
+  avrdude_message("%s: Error: No USB support in this compile of avrdude\n",
     progname);
   return NULL;
 }
@@ -110,7 +110,7 @@ struct dfu_dev * dfu_open(char *port_spec)
    */
 
   if (strncmp(port_spec, "usb", 3) != 0) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "Invalid port specification \"%s\" for USB device\n",
       progname, port_spec);
     return NULL;
@@ -119,7 +119,7 @@ struct dfu_dev * dfu_open(char *port_spec)
   if(':' == port_spec[3]) {
       bus_name = strdup(port_spec + 3 + 1);
       if (bus_name == NULL) {
-        fprintf(stderr, "%s: Out of memory in strdup\n", progname);
+        avrdude_message("%s: Out of memory in strdup\n", progname);
         return NULL;
       }
 
@@ -136,7 +136,7 @@ struct dfu_dev * dfu_open(char *port_spec)
 
   if (dfu == NULL)
   {
-    fprintf(stderr, "%s: out of memory\n", progname);
+    avrdude_message("%s: out of memory\n", progname);
     return 0;
   }
 
@@ -169,7 +169,7 @@ int dfu_init(struct dfu_dev *dfu, unsigned short vid, unsigned short pid)
    */
 
   if (pid == 0 && dfu->dev_name == NULL) {
-    fprintf(stderr, "%s: Error: No DFU support for part; "
+    avrdude_message("%s: Error: No DFU support for part; "
       "specify PID in config or USB address (via -P) to override.\n",
       progname);
     return -1;
@@ -206,20 +206,19 @@ int dfu_init(struct dfu_dev *dfu, unsigned short vid, unsigned short pid)
      * why the match failed, and if we came across another DFU-capable part.
      */
 
-    fprintf(stderr, "%s: Error: No matching USB device found\n", progname);
+    avrdude_message("%s: Error: No matching USB device found\n", progname);
     return -1;
   }
 
   if(verbose)
-    fprintf(stderr,
-      "%s: Found VID=0x%04x PID=0x%04x at %s:%s\n",
-      progname, found->descriptor.idVendor, found->descriptor.idProduct,
-      found->bus->dirname, found->filename);
+    avrdude_message("%s: Found VID=0x%04x PID=0x%04x at %s:%s\n",
+                    progname, found->descriptor.idVendor, found->descriptor.idProduct,
+                    found->bus->dirname, found->filename);
 
   dfu->dev_handle = usb_open(found);
 
   if (dfu->dev_handle == NULL) {
-    fprintf(stderr, "%s: Error: USB device at %s:%s: %s\n",
+    avrdude_message("%s: Error: USB device at %s:%s: %s\n",
       progname, found->bus->dirname, found->filename, usb_strerror());
     return -1;
   }
@@ -271,7 +270,7 @@ int dfu_getstatus(struct dfu_dev *dfu, struct dfu_status *status)
   int result;
 
   if (verbose > 3)
-    fprintf(stderr, "%s: dfu_getstatus(): issuing control IN message\n",
+    avrdude_message("%s: dfu_getstatus(): issuing control IN message\n",
             progname);
 
   result = usb_control_msg(dfu->dev_handle,
@@ -279,31 +278,30 @@ int dfu_getstatus(struct dfu_dev *dfu, struct dfu_status *status)
     (char*) status, sizeof(struct dfu_status), dfu->timeout);
 
   if (result < 0) {
-    fprintf(stderr, "%s: Error: Failed to get DFU status: %s\n",
+    avrdude_message("%s: Error: Failed to get DFU status: %s\n",
       progname, usb_strerror());
     return -1;
   }
 
   if (result < sizeof(struct dfu_status)) {
-    fprintf(stderr, "%s: Error: Failed to get DFU status: %s\n",
+    avrdude_message("%s: Error: Failed to get DFU status: %s\n",
       progname, "short read");
     return -1;
   }
 
   if (result > sizeof(struct dfu_status)) {
-    fprintf(stderr, "%s: Error: Oversize read (should not happen); "
+    avrdude_message("%s: Error: Oversize read (should not happen); "
       "exiting\n", progname);
     exit(1);
   }
 
   if (verbose > 3)
-    fprintf(stderr,
-            "%s: dfu_getstatus(): bStatus 0x%02x, bwPollTimeout %d, bState 0x%02x, iString %d\n",
-            progname,
-            status->bStatus,
-            status->bwPollTimeout[0] | (status->bwPollTimeout[1] << 8) | (status->bwPollTimeout[2] << 16),
-            status->bState,
-            status->iString);
+    avrdude_message("%s: dfu_getstatus(): bStatus 0x%02x, bwPollTimeout %d, bState 0x%02x, iString %d\n",
+                    progname,
+                    status->bStatus,
+                    status->bwPollTimeout[0] | (status->bwPollTimeout[1] << 8) | (status->bwPollTimeout[2] << 16),
+                    status->bState,
+                    status->iString);
 
   return 0;
 }
@@ -313,7 +311,7 @@ int dfu_clrstatus(struct dfu_dev *dfu)
   int result;
 
   if (verbose > 3)
-    fprintf(stderr, "%s: dfu_clrstatus(): issuing control OUT message\n",
+    avrdude_message("%s: dfu_clrstatus(): issuing control OUT message\n",
             progname);
 
   result = usb_control_msg(dfu->dev_handle,
@@ -321,7 +319,7 @@ int dfu_clrstatus(struct dfu_dev *dfu)
     NULL, 0, dfu->timeout);
 
   if (result < 0) {
-    fprintf(stderr, "%s: Error: Failed to clear DFU status: %s\n",
+    avrdude_message("%s: Error: Failed to clear DFU status: %s\n",
       progname, usb_strerror());
     return -1;
   }
@@ -334,7 +332,7 @@ int dfu_abort(struct dfu_dev *dfu)
   int result;
 
   if (verbose > 3)
-    fprintf(stderr, "%s: dfu_abort(): issuing control OUT message\n",
+    avrdude_message("%s: dfu_abort(): issuing control OUT message\n",
             progname);
 
   result = usb_control_msg(dfu->dev_handle,
@@ -342,7 +340,7 @@ int dfu_abort(struct dfu_dev *dfu)
     NULL, 0, dfu->timeout);
 
   if (result < 0) {
-    fprintf(stderr, "%s: Error: Failed to reset DFU state: %s\n",
+    avrdude_message("%s: Error: Failed to reset DFU state: %s\n",
       progname, usb_strerror());
     return -1;
   }
@@ -356,28 +354,27 @@ int dfu_dnload(struct dfu_dev *dfu, void *ptr, int size)
   int result;
 
   if (verbose > 3)
-    fprintf(stderr,
-            "%s: dfu_dnload(): issuing control OUT message, wIndex = %d, ptr = %p, size = %d\n",
-            progname, wIndex, ptr, size);
+    avrdude_message("%s: dfu_dnload(): issuing control OUT message, wIndex = %d, ptr = %p, size = %d\n",
+                    progname, wIndex, ptr, size);
 
   result = usb_control_msg(dfu->dev_handle,
     USB_TYPE_CLASS | USB_RECIP_INTERFACE, DFU_DNLOAD, wIndex++, 0,
     ptr, size, dfu->timeout);
 
   if (result < 0) {
-    fprintf(stderr, "%s: Error: DFU_DNLOAD failed: %s\n",
+    avrdude_message("%s: Error: DFU_DNLOAD failed: %s\n",
       progname, usb_strerror());
     return -1;
   }
 
   if (result < size) {
-    fprintf(stderr, "%s: Error: DFU_DNLOAD failed: %s\n",
+    avrdude_message("%s: Error: DFU_DNLOAD failed: %s\n",
       progname, "short write");
     return -1;
   }
 
   if (result > size) {
-    fprintf(stderr, "%s: Error: Oversize write (should not happen); " \
+    avrdude_message("%s: Error: Oversize write (should not happen); " \
       "exiting\n", progname);
     exit(1);
   }
@@ -390,28 +387,27 @@ int dfu_upload(struct dfu_dev *dfu, void *ptr, int size)
   int result;
 
   if (verbose > 3)
-    fprintf(stderr,
-            "%s: dfu_upload(): issuing control IN message, wIndex = %d, ptr = %p, size = %d\n",
-            progname, wIndex, ptr, size);
+    avrdude_message("%s: dfu_upload(): issuing control IN message, wIndex = %d, ptr = %p, size = %d\n",
+                    progname, wIndex, ptr, size);
 
   result = usb_control_msg(dfu->dev_handle,
     0x80 | USB_TYPE_CLASS | USB_RECIP_INTERFACE, DFU_UPLOAD, wIndex++, 0,
     ptr, size, dfu->timeout);
 
   if (result < 0) {
-    fprintf(stderr, "%s: Error: DFU_UPLOAD failed: %s\n",
+    avrdude_message("%s: Error: DFU_UPLOAD failed: %s\n",
       progname, usb_strerror());
     return -1;
   }
 
   if (result < size) {
-    fprintf(stderr, "%s: Error: DFU_UPLOAD failed: %s\n",
+    avrdude_message("%s: Error: DFU_UPLOAD failed: %s\n",
       progname, "short read");
     return -1;
   }
 
   if (result > size) {
-    fprintf(stderr, "%s: Error: Oversize read (should not happen); "
+    avrdude_message("%s: Error: Oversize read (should not happen); "
       "exiting\n", progname);
     exit(1);
   }
@@ -422,26 +418,26 @@ int dfu_upload(struct dfu_dev *dfu, void *ptr, int size)
 void dfu_show_info(struct dfu_dev *dfu)
 {
   if (dfu->manf_str != NULL)
-    fprintf(stderr, "    USB Vendor          : %s (0x%04hX)\n",
+    avrdude_message("    USB Vendor          : %s (0x%04hX)\n",
       dfu->manf_str, (unsigned short) dfu->dev_desc.idVendor);
   else
-    fprintf(stderr, "    USB Vendor          : 0x%04hX\n",
+    avrdude_message("    USB Vendor          : 0x%04hX\n",
       (unsigned short) dfu->dev_desc.idVendor);
 
   if (dfu->prod_str != NULL)
-    fprintf(stderr, "    USB Product         : %s (0x%04hX)\n",
+    avrdude_message("    USB Product         : %s (0x%04hX)\n",
       dfu->prod_str, (unsigned short) dfu->dev_desc.idProduct);
   else
-    fprintf(stderr, "    USB Product         : 0x%04hX\n",
+    avrdude_message("    USB Product         : 0x%04hX\n",
       (unsigned short) dfu->dev_desc.idProduct);
 
-  fprintf(stderr, "    USB Release         : %hu.%hu.%hu\n",
+  avrdude_message("    USB Release         : %hu.%hu.%hu\n",
     ((unsigned short) dfu->dev_desc.bcdDevice >> 8) & 0xFF,
     ((unsigned short) dfu->dev_desc.bcdDevice >> 4) & 0xF,
     ((unsigned short) dfu->dev_desc.bcdDevice >> 0) & 0xF);
 
   if (dfu->serno_str != NULL)
-    fprintf(stderr, "    USB Serial No       : %s\n", dfu->serno_str);
+    avrdude_message("    USB Serial No       : %s\n", dfu->serno_str);
 }
 
 /* INTERNAL FUNCTION DEFINITIONS
@@ -458,7 +454,7 @@ char * get_usb_string(usb_dev_handle * dev_handle, int index) {
   result = usb_get_string_simple(dev_handle, index, buffer, sizeof(buffer)-1);
 
   if (result < 0) {
-    fprintf( stderr, "%s: Warning: Failed to read USB device string %d: %s\n",
+    avrdude_message("%s: Warning: Failed to read USB device string %d: %s\n",
       progname, index, usb_strerror());
     return NULL;
   }
@@ -466,7 +462,7 @@ char * get_usb_string(usb_dev_handle * dev_handle, int index) {
   str = malloc(result+1);
 
   if (str == NULL) {
-    fprintf(stderr, "%s: Out of memory allocating a string\n", progname);
+    avrdude_message("%s: Out of memory allocating a string\n", progname);
     return 0;
   }
 
diff --git a/fileio.c b/fileio.c
index 85d7f55c..bdf99134 100644
--- a/fileio.c
+++ b/fileio.c
@@ -126,7 +126,7 @@ static int b2ihex(unsigned char * inbuf, int bufsize,
   unsigned char cksum;
 
   if (recsize > 255) {
-    fprintf(stderr, "%s: recsize=%d, must be < 256\n",
+    avrdude_message("%s: recsize=%d, must be < 256\n",
               progname, recsize);
     return -1;
   }
@@ -306,14 +306,14 @@ static int ihex2b(char * infile, FILE * inf,
       continue;
     rc = ihex_readrec(&ihex, buffer);
     if (rc < 0) {
-      fprintf(stderr, "%s: invalid record at line %d of \"%s\"\n",
+      avrdude_message("%s: invalid record at line %d of \"%s\"\n",
               progname, lineno, infile);
       return -1;
     }
     else if (rc != ihex.cksum) {
-      fprintf(stderr, "%s: ERROR: checksum mismatch at line %d of \"%s\"\n",
+      avrdude_message("%s: ERROR: checksum mismatch at line %d of \"%s\"\n",
               progname, lineno, infile);
-      fprintf(stderr, "%s: checksum=0x%02x, computed checksum=0x%02x\n",
+      avrdude_message("%s: checksum=0x%02x, computed checksum=0x%02x\n",
               progname, ihex.cksum, rc);
       return -1;
     }
@@ -321,16 +321,14 @@ static int ihex2b(char * infile, FILE * inf,
     switch (ihex.rectyp) {
       case 0: /* data record */
         if (fileoffset != 0 && baseaddr < fileoffset) {
-          fprintf(stderr, 
-                  "%s: ERROR: address 0x%04x out of range (below fileoffset 0x%x) at line %d of %s\n",
-                  progname, baseaddr, fileoffset, lineno, infile);
+          avrdude_message("%s: ERROR: address 0x%04x out of range (below fileoffset 0x%x) at line %d of %s\n",
+                          progname, baseaddr, fileoffset, lineno, infile);
           return -1;
         }
         nextaddr = ihex.loadofs + baseaddr - fileoffset;
         if (nextaddr + ihex.reclen > bufsize) {
-          fprintf(stderr, 
-                  "%s: ERROR: address 0x%04x out of range at line %d of %s\n",
-                  progname, nextaddr+ihex.reclen, lineno, infile);
+          avrdude_message("%s: ERROR: address 0x%04x out of range at line %d of %s\n",
+                          progname, nextaddr+ihex.reclen, lineno, infile);
           return -1;
         }
         for (i=0; i<ihex.reclen; i++) {
@@ -362,10 +360,9 @@ static int ihex2b(char * infile, FILE * inf,
         break;
 
       default:
-        fprintf(stderr, 
-                "%s: don't know how to deal with rectype=%d " 
-                "at line %d of %s\n",
-                progname, ihex.rectyp, lineno, infile);
+        avrdude_message("%s: don't know how to deal with rectype=%d "
+                        "at line %d of %s\n",
+                        progname, ihex.rectyp, lineno, infile);
         return -1;
         break;
     }
@@ -373,18 +370,16 @@ static int ihex2b(char * infile, FILE * inf,
   } /* while */
 
   if (maxaddr == 0) {
-    fprintf(stderr, 
-	    "%s: ERROR: No valid record found in Intel Hex "
-	    "file \"%s\"\n",
-	    progname, infile);
+    avrdude_message("%s: ERROR: No valid record found in Intel Hex "
+                    "file \"%s\"\n",
+                    progname, infile);
 
     return -1;
   }
   else {
-    fprintf(stderr, 
-	    "%s: WARNING: no end of file record found for Intel Hex "
-	    "file \"%s\"\n",
-	    progname, infile);
+    avrdude_message("%s: WARNING: no end of file record found for Intel Hex "
+                    "file \"%s\"\n",
+                    progname, infile);
 
     return maxaddr;
   }
@@ -403,7 +398,7 @@ static int b2srec(unsigned char * inbuf, int bufsize,
   char * tmpl=0;
 
   if (recsize > 255) {
-    fprintf(stderr, "%s: ERROR: recsize=%d, must be < 256\n",
+    avrdude_message("%s: ERROR: recsize=%d, must be < 256\n",
             progname, recsize);
     return -1;
   }
@@ -436,12 +431,12 @@ static int b2srec(unsigned char * inbuf, int bufsize,
         tmpl="S3%02X%08X";
       }
       else {
-        fprintf(stderr, "%s: ERROR: address=%d, out of range\n",
+        avrdude_message("%s: ERROR: address=%d, out of range\n",
                 progname, nextaddr);
         return -1;
       }
 
-      fprintf(outf, tmpl, n + addr_width + 1, nextaddr);		
+      fprintf(outf, tmpl, n + addr_width + 1, nextaddr);
 
       cksum += n + addr_width + 1;
 
@@ -601,19 +596,19 @@ static int srec2b(char * infile, FILE * inf,
     rc = srec_readrec(&srec, buffer);
 
     if (rc < 0) {
-      fprintf(stderr, "%s: ERROR: invalid record at line %d of \"%s\"\n",
+      avrdude_message("%s: ERROR: invalid record at line %d of \"%s\"\n",
               progname, lineno, infile);
       return -1;
     }
     else if (rc != srec.cksum) {
-      fprintf(stderr, "%s: ERROR: checksum mismatch at line %d of \"%s\"\n",
+      avrdude_message("%s: ERROR: checksum mismatch at line %d of \"%s\"\n",
               progname, lineno, infile);
-      fprintf(stderr, "%s: checksum=0x%02x, computed checksum=0x%02x\n",
+      avrdude_message("%s: checksum=0x%02x, computed checksum=0x%02x\n",
               progname, srec.cksum, rc);
       return -1;
     }
 
-    datarec=0;	
+    datarec=0; 
     switch (srec.rectyp) {
       case 0x30: /* S0 - header record*/
         /* skip */
@@ -635,18 +630,16 @@ static int srec2b(char * infile, FILE * inf,
         break;
 
       case 0x34: /* S4 - symbol record (LSI extension) */
-        fprintf(stderr, 
-                "%s: ERROR: not supported record at line %d of %s\n",
-                progname, lineno, infile);
+        avrdude_message("%s: ERROR: not supported record at line %d of %s\n",
+                        progname, lineno, infile);
         return -1;
 
       case 0x35: /* S5 - count of S1,S2 and S3 records previously tx'd */
         if (srec.loadofs != reccount){
-          fprintf(stderr, 
-                  "%s: ERROR: count of transmitted data records mismatch "
-                  "at line %d of \"%s\"\n",
-                  progname, lineno, infile);
-          fprintf(stderr, "%s: transmitted data records= %d, expected "
+          avrdude_message("%s: ERROR: count of transmitted data records mismatch "
+                          "at line %d of \"%s\"\n",
+                          progname, lineno, infile);
+          avrdude_message("%s: transmitted data records= %d, expected "
                   "value= %d\n",
                   progname, reccount, srec.loadofs);
           return -1;
@@ -659,24 +652,23 @@ static int srec2b(char * infile, FILE * inf,
         return maxaddr;
 
       default:
-        fprintf(stderr, 
-                "%s: ERROR: don't know how to deal with rectype S%d " 
-                "at line %d of %s\n",
-                progname, srec.rectyp, lineno, infile);
+        avrdude_message("%s: ERROR: don't know how to deal with rectype S%d "
+                        "at line %d of %s\n",
+                        progname, srec.rectyp, lineno, infile);
         return -1;
     }
 
     if (datarec == 1) {
       nextaddr = srec.loadofs;
       if (nextaddr < fileoffset) {
-        fprintf(stderr, msg, progname, nextaddr,
+        avrdude_message(msg, progname, nextaddr,
                 "(below fileoffset) ",
                 lineno, infile);
         return -1;
       }
       nextaddr -= fileoffset;
       if (nextaddr + srec.reclen > bufsize) {
-        fprintf(stderr, msg, progname, nextaddr+srec.reclen, "",
+        avrdude_message(msg, progname, nextaddr+srec.reclen, "",
                 lineno, infile);
         return -1;
       }
@@ -686,15 +678,14 @@ static int srec2b(char * infile, FILE * inf,
       }
       if (nextaddr+srec.reclen > maxaddr)
         maxaddr = nextaddr+srec.reclen;
-      reccount++;	
+      reccount++;      
     }
 
-  } 
+  }
 
-  fprintf(stderr, 
-          "%s: WARNING: no end of file record found for Motorola S-Records "
-          "file \"%s\"\n",
-          progname, infile);
+  avrdude_message("%s: WARNING: no end of file record found for Motorola S-Records "
+                  "file \"%s\"\n",
+                  progname, infile);
 
   return maxaddr;
 }
@@ -737,9 +728,8 @@ static Elf_Scn *elf_get_scn(Elf *e, Elf32_Phdr *ph, Elf32_Shdr **shptr)
     Elf32_Shdr *sh;
     size_t ndx = elf_ndxscn(s);
     if ((sh = elf32_getshdr(s)) == NULL) {
-      fprintf(stderr,
-              "%s: ERROR: Error reading section #%u header: %s\n",
-              progname, (unsigned int)ndx, elf_errmsg(-1));
+      avrdude_message("%s: ERROR: Error reading section #%u header: %s\n",
+                      progname, (unsigned int)ndx, elf_errmsg(-1));
       continue;
     }
     if ((sh->sh_flags & SHF_ALLOC) == 0 ||
@@ -756,10 +746,9 @@ static Elf_Scn *elf_get_scn(Elf *e, Elf32_Phdr *ph, Elf32_Shdr **shptr)
     }
   }
 
-  fprintf(stderr,
-          "%s: ERROR: Cannot find a matching section for "
-          "program header entry @p_vaddr 0x%x\n",
-          progname, ph->p_vaddr);
+  avrdude_message("%s: ERROR: Cannot find a matching section for "
+                  "program header entry @p_vaddr 0x%x\n",
+                  progname, ph->p_vaddr);
   return NULL;
 }
 
@@ -830,9 +819,8 @@ static int elf2b(char * infile, FILE * inf,
   unsigned int low, high, foff;
 
   if (elf_mem_limits(mem, p, &low, &high, &foff) != 0) {
-    fprintf(stderr,
-            "%s: ERROR: Cannot handle \"%s\" memory region from ELF file\n",
-            progname, mem->desc);
+    avrdude_message("%s: ERROR: Cannot handle \"%s\" memory region from ELF file\n",
+                    progname, mem->desc);
     return -1;
   }
 
@@ -849,10 +837,9 @@ static int elf2b(char * infile, FILE * inf,
        strcmp(mem->desc, "apptable") == 0)) {
     AVRMEM *flashmem = avr_locate_mem(p, "flash");
     if (flashmem == NULL) {
-      fprintf(stderr,
-              "%s: ERROR: No \"flash\" memory region found, "
-              "cannot compute bounds of \"%s\" sub-region.\n",
-              progname, mem->desc);
+      avrdude_message("%s: ERROR: No \"flash\" memory region found, "
+                      "cannot compute bounds of \"%s\" sub-region.\n",
+                      progname, mem->desc);
       return -1;
     }
     /* The config file offsets are PDI offsets, rebase to 0. */
@@ -861,21 +848,18 @@ static int elf2b(char * infile, FILE * inf,
   }
 
   if (elf_version(EV_CURRENT) == EV_NONE) {
-    fprintf(stderr,
-            "%s: ERROR: ELF library initialization failed: %s\n",
-            progname, elf_errmsg(-1));
+    avrdude_message("%s: ERROR: ELF library initialization failed: %s\n",
+                    progname, elf_errmsg(-1));
     return -1;
   }
   if ((e = elf_begin(fileno(inf), ELF_C_READ, NULL)) == NULL) {
-    fprintf(stderr,
-            "%s: ERROR: Cannot open \"%s\" as an ELF file: %s\n",
-            progname, infile, elf_errmsg(-1));
+    avrdude_message("%s: ERROR: Cannot open \"%s\" as an ELF file: %s\n",
+                    progname, infile, elf_errmsg(-1));
     return -1;
   }
   if (elf_kind(e) != ELF_K_ELF) {
-    fprintf(stderr,
-            "%s: ERROR: Cannot use \"%s\" as an ELF input file\n",
-            progname, infile);
+    avrdude_message("%s: ERROR: Cannot use \"%s\" as an ELF input file\n",
+                    progname, infile);
     goto done;
   }
 
@@ -883,9 +867,8 @@ static int elf2b(char * infile, FILE * inf,
   const char *id = elf_getident(e, &isize);
 
   if (id == NULL) {
-    fprintf(stderr,
-            "%s: ERROR: Error reading ident area of \"%s\": %s\n",
-            progname, infile, elf_errmsg(-1));
+    avrdude_message("%s: ERROR: Error reading ident area of \"%s\": %s\n",
+                    progname, infile, elf_errmsg(-1));
     goto done;
   }
 
@@ -900,25 +883,22 @@ static int elf2b(char * infile, FILE * inf,
   }
   if (id[EI_CLASS] != ELFCLASS32 ||
       id[EI_DATA] != endianess) {
-    fprintf(stderr,
-            "%s: ERROR: ELF file \"%s\" is not a "
-            "32-bit, %s-endian file that was expected\n",
-            progname, infile, endianname);
+    avrdude_message("%s: ERROR: ELF file \"%s\" is not a "
+                    "32-bit, %s-endian file that was expected\n",
+                    progname, infile, endianname);
     goto done;
   }
 
   Elf32_Ehdr *eh;
   if ((eh = elf32_getehdr(e)) == NULL) {
-    fprintf(stderr,
-            "%s: ERROR: Error reading ehdr of \"%s\": %s\n",
-            progname, infile, elf_errmsg(-1));
+    avrdude_message("%s: ERROR: Error reading ehdr of \"%s\": %s\n",
+                    progname, infile, elf_errmsg(-1));
     goto done;
   }
 
   if (eh->e_type != ET_EXEC) {
-    fprintf(stderr,
-            "%s: ERROR: ELF file \"%s\" is not an executable file\n",
-            progname, infile);
+    avrdude_message("%s: ERROR: ELF file \"%s\" is not an executable file\n",
+                    progname, infile);
     goto done;
   }
 
@@ -932,32 +912,28 @@ static int elf2b(char * infile, FILE * inf,
     mname = "AVR";
   }
   if (eh->e_machine != machine) {
-    fprintf(stderr,
-            "%s: ERROR: ELF file \"%s\" is not for machine %s\n",
-            progname, infile, mname);
+    avrdude_message("%s: ERROR: ELF file \"%s\" is not for machine %s\n",
+                    progname, infile, mname);
     goto done;
   }
   if (eh->e_phnum == 0xffff /* PN_XNUM */) {
-    fprintf(stderr,
-            "%s: ERROR: ELF file \"%s\" uses extended "
-            "program header numbers which are not expected\n",
-            progname, infile);
+    avrdude_message("%s: ERROR: ELF file \"%s\" uses extended "
+                    "program header numbers which are not expected\n",
+                    progname, infile);
     goto done;
   }
 
   Elf32_Phdr *ph;
   if ((ph = elf32_getphdr(e)) == NULL) {
-    fprintf(stderr,
-            "%s: ERROR: Error reading program header table of \"%s\": %s\n",
-            progname, infile, elf_errmsg(-1));
+    avrdude_message("%s: ERROR: Error reading program header table of \"%s\": %s\n",
+                    progname, infile, elf_errmsg(-1));
     goto done;
   }
 
   size_t sndx;
   if (elf_getshdrstrndx(e, &sndx) != 0) {
-    fprintf(stderr,
-            "%s: ERROR: Error obtaining section name string table: %s\n",
-            progname, elf_errmsg(-1));
+    avrdude_message("%s: ERROR: Error obtaining section name string table: %s\n",
+                    progname, elf_errmsg(-1));
     sndx = 0;
   }
 
@@ -971,10 +947,9 @@ static int elf2b(char * infile, FILE * inf,
       continue;
 
     if (verbose >= 2) {
-      fprintf(stderr,
-              "%s: Considering PT_LOAD program header entry #%d:\n"
-              "    p_vaddr 0x%x, p_paddr 0x%x, p_filesz %d\n",
-              progname, i, ph[i].p_vaddr, ph[i].p_paddr, ph[i].p_filesz);
+      avrdude_message("%s: Considering PT_LOAD program header entry #%d:\n"
+                      "    p_vaddr 0x%x, p_paddr 0x%x, p_filesz %d\n",
+                      progname, i, ph[i].p_vaddr, ph[i].p_paddr, ph[i].p_filesz);
     }
 
     Elf32_Shdr *sh;
@@ -995,9 +970,8 @@ static int elf2b(char * infile, FILE * inf,
       lma = ph[i].p_paddr + sh->sh_offset - ph[i].p_offset;
 
       if (verbose >= 2) {
-        fprintf(stderr,
-                "%s: Found section \"%s\", LMA 0x%x, sh_size %u\n",
-                progname, sname, lma, sh->sh_size);
+        avrdude_message("%s: Found section \"%s\", LMA 0x%x, sh_size %u\n",
+                        progname, sname, lma, sh->sh_size);
       }
 
       if (lma >= low &&
@@ -1005,9 +979,8 @@ static int elf2b(char * infile, FILE * inf,
         /* OK */
       } else {
         if (verbose >= 2) {
-          fprintf(stderr,
-                  "    => skipping, inappropriate for \"%s\" memory region\n",
-                  mem->desc);
+          avrdude_message("    => skipping, inappropriate for \"%s\" memory region\n",
+                          mem->desc);
         }
         continue;
       }
@@ -1021,35 +994,30 @@ static int elf2b(char * infile, FILE * inf,
        */
       if (mem->size != 1 &&
           sh->sh_size > mem->size) {
-        fprintf(stderr,
-                "%s: ERROR: section \"%s\" does not fit into \"%s\" memory:\n"
-                "    0x%x + %u > %u\n",
-                progname, sname, mem->desc,
-                lma, sh->sh_size, mem->size);
+        avrdude_message("%s: ERROR: section \"%s\" does not fit into \"%s\" memory:\n"
+                        "    0x%x + %u > %u\n",
+                        progname, sname, mem->desc,
+                        lma, sh->sh_size, mem->size);
         continue;
       }
 
       Elf_Data *d = NULL;
       while ((d = elf_getdata(s, d)) != NULL) {
         if (verbose >= 2) {
-          fprintf(stderr,
-                  "    Data block: d_buf %p, d_off 0x%x, d_size %d\n",
-                  d->d_buf, (unsigned int)d->d_off, d->d_size);
+          avrdude_message("    Data block: d_buf %p, d_off 0x%x, d_size %d\n",
+                          d->d_buf, (unsigned int)d->d_off, d->d_size);
         }
         if (mem->size == 1) {
           if (d->d_off != 0) {
-            fprintf(stderr,
-                    "%s: ERROR: unexpected data block at offset != 0\n",
-                    progname);
+            avrdude_message("%s: ERROR: unexpected data block at offset != 0\n",
+                            progname);
           } else if (foff >= d->d_size) {
-            fprintf(stderr,
-                    "%s: ERROR: ELF file section does not contain byte at offset %d\n",
-                    progname, foff);
+            avrdude_message("%s: ERROR: ELF file section does not contain byte at offset %d\n",
+                            progname, foff);
           } else {
             if (verbose >= 2) {
-              fprintf(stderr,
-                      "    Extracting one byte from file offset %d\n",
-                      foff);
+              avrdude_message("    Extracting one byte from file offset %d\n",
+                              foff);
             }
             mem->buf[0] = ((unsigned char *)d->d_buf)[foff];
             mem->tags[0] = TAG_ALLOCATED;
@@ -1062,9 +1030,8 @@ static int elf2b(char * infile, FILE * inf,
           if ((int)(idx + d->d_size) > rv)
             rv = idx + d->d_size;
           if (verbose >= 3) {
-            fprintf(stderr,
-                    "    Writing %d bytes to mem offset 0x%x\n",
-                    d->d_size, idx);
+            avrdude_message("    Writing %d bytes to mem offset 0x%x\n",
+                            d->d_size, idx);
           }
           memcpy(mem->buf + idx, d->d_buf, d->d_size);
           memset(mem->tags + idx, TAG_ALLOCATED, d->d_size);
@@ -1134,16 +1101,15 @@ static int fileio_rbin(struct fioparms * fio,
       rc = fwrite(buf, 1, size, f);
       break;
     default:
-      fprintf(stderr, "%s: fileio: invalid operation=%d\n",
+      avrdude_message("%s: fileio: invalid operation=%d\n",
               progname, fio->op);
       return -1;
   }
 
   if (rc < 0 || (fio->op == FIO_WRITE && rc < size)) {
-    fprintf(stderr, 
-            "%s: %s error %s %s: %s; %s %d of the expected %d bytes\n", 
-            progname, fio->iodesc, fio->dir, filename, strerror(errno),
-            fio->rw, rc, size);
+    avrdude_message("%s: %s error %s %s: %s; %s %d of the expected %d bytes\n",
+                    progname, fio->iodesc, fio->dir, filename, strerror(errno),
+                    fio->rw, rc, size);
     return -1;
   }
 
@@ -1170,9 +1136,8 @@ static int fileio_imm(struct fioparms * fio,
 	    strtoul (p, &e, 0):
 	    strtoul (p + 2, &e, 2);
         if (*e != 0) {
-          fprintf(stderr,
-                  "%s: invalid byte value (%s) specified for immediate mode\n",
-                  progname, p);
+          avrdude_message("%s: invalid byte value (%s) specified for immediate mode\n",
+                          progname, p);
           return -1;
         }
         mem->buf[loc] = b;
@@ -1182,16 +1147,15 @@ static int fileio_imm(struct fioparms * fio,
       }
       break;
     default:
-      fprintf(stderr, "%s: fileio: invalid operation=%d\n",
+      avrdude_message("%s: fileio: invalid operation=%d\n",
               progname, fio->op);
       return -1;
   }
 
   if (rc < 0 || (fio->op == FIO_WRITE && rc < size)) {
-    fprintf(stderr, 
-            "%s: %s error %s %s: %s; %s %d of the expected %d bytes\n", 
-            progname, fio->iodesc, fio->dir, filename, strerror(errno),
-            fio->rw, rc, size);
+    avrdude_message("%s: %s error %s %s: %s; %s %d of the expected %d bytes\n",
+                    progname, fio->iodesc, fio->dir, filename, strerror(errno),
+                    fio->rw, rc, size);
     return -1;
   }
 
@@ -1219,7 +1183,7 @@ static int fileio_ihex(struct fioparms * fio,
       break;
 
     default:
-      fprintf(stderr, "%s: invalid Intex Hex file I/O operation=%d\n",
+      avrdude_message("%s: invalid Intex Hex file I/O operation=%d\n",
               progname, fio->op);
       return -1;
       break;
@@ -1249,7 +1213,7 @@ static int fileio_srec(struct fioparms * fio,
       break;
 
     default:
-      fprintf(stderr, "%s: ERROR: invalid Motorola S-Records file I/O "
+      avrdude_message("%s: ERROR: invalid Motorola S-Records file I/O "
               "operation=%d\n",
               progname, fio->op);
       return -1;
@@ -1269,7 +1233,7 @@ static int fileio_elf(struct fioparms * fio,
 
   switch (fio->op) {
     case FIO_WRITE:
-      fprintf(stderr, "%s: ERROR: write operation not (yet) "
+      avrdude_message("%s: ERROR: write operation not (yet) "
               "supported for ELF\n",
               progname);
       return -1;
@@ -1280,7 +1244,7 @@ static int fileio_elf(struct fioparms * fio,
       return rc;
 
     default:
-      fprintf(stderr, "%s: ERROR: invalid ELF file I/O "
+      avrdude_message("%s: ERROR: invalid ELF file I/O "
               "operation=%d\n",
               progname, fio->op);
       return -1;
@@ -1326,7 +1290,7 @@ static int fileio_num(struct fioparms * fio,
     case FIO_WRITE:
       break;
     default:
-      fprintf(stderr, "%s: fileio: invalid operation=%d\n",
+      avrdude_message("%s: fileio: invalid operation=%d\n",
               progname, fio->op);
       return -1;
   }
@@ -1356,7 +1320,7 @@ static int fileio_num(struct fioparms * fio,
   return 0;
 
  writeerr:
-  fprintf(stderr, "%s: error writing to %s: %s\n",
+  avrdude_message("%s: error writing to %s: %s\n",
 	  progname, filename, strerror(errno));
   return -1;
 }
@@ -1383,7 +1347,7 @@ int fileio_setparms(int op, struct fioparms * fp,
       break;
 
     default:
-      fprintf(stderr, "%s: invalid I/O operation %d\n",
+      avrdude_message("%s: invalid I/O operation %d\n",
               progname, op);
       return -1;
       break;
@@ -1422,7 +1386,7 @@ static int fmt_autodetect(char * fname)
   f = fopen(fname, "rb");
 #endif
   if (f == NULL) {
-    fprintf(stderr, "%s: error opening %s: %s\n",
+    avrdude_message("%s: error opening %s: %s\n",
             progname, fname, strerror(errno));
     return -1;
   }
@@ -1505,9 +1469,8 @@ int fileio(int op, char * filename, FILEFMT format,
 
   mem = avr_locate_mem(p, memtype);
   if (mem == NULL) {
-    fprintf(stderr, 
-            "fileio(): memory type \"%s\" not configured for device \"%s\"\n",
-            memtype, p->desc);
+    avrdude_message("fileio(): memory type \"%s\" not configured for device \"%s\"\n",
+                    memtype, p->desc);
     return -1;
   }
 
@@ -1544,23 +1507,21 @@ int fileio(int op, char * filename, FILEFMT format,
 
   if (format == FMT_AUTO) {
     if (using_stdio) {
-      fprintf(stderr, 
-              "%s: can't auto detect file format when using stdin/out.\n"
-              "%s  Please specify a file format and try again.\n", 
-              progname, progbuf);
+      avrdude_message("%s: can't auto detect file format when using stdin/out.\n"
+                      "%s  Please specify a file format and try again.\n",
+                      progname, progbuf);
       return -1;
     }
 
     format = fmt_autodetect(fname);
     if (format < 0) {
-      fprintf(stderr, 
-              "%s: can't determine file format for %s, specify explicitly\n",
-              progname, fname);
+      avrdude_message("%s: can't determine file format for %s, specify explicitly\n",
+                      progname, fname);
       return -1;
     }
 
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: %s file %s auto detected as %s\n", 
+      avrdude_message("%s: %s file %s auto detected as %s\n",
               progname, fio.iodesc, fname, fmtstr(format));
     }
   }
@@ -1584,7 +1545,7 @@ int fileio(int op, char * filename, FILEFMT format,
     if (!using_stdio) {
       f = fopen(fname, fio.mode);
       if (f == NULL) {
-        fprintf(stderr, "%s: can't open %s file %s: %s\n",
+        avrdude_message("%s: can't open %s file %s: %s\n",
                 progname, fio.iodesc, fname, strerror(errno));
         return -1;
       }
@@ -1608,10 +1569,9 @@ int fileio(int op, char * filename, FILEFMT format,
 #ifdef HAVE_LIBELF
       rc = fileio_elf(&fio, fname, f, mem, p, size);
 #else
-      fprintf(stderr,
-              "%s: can't handle ELF file %s, "
-              "ELF file support was not compiled in\n",
-              progname, fname);
+      avrdude_message("%s: can't handle ELF file %s, "
+                      "ELF file support was not compiled in\n",
+                      progname, fname);
       rc = -1;
 #endif
       break;
@@ -1628,7 +1588,7 @@ int fileio(int op, char * filename, FILEFMT format,
       break;
 
     default:
-      fprintf(stderr, "%s: invalid %s file format: %d\n",
+      avrdude_message("%s: invalid %s file format: %d\n",
               progname, fio.iodesc, format);
       return -1;
   }
diff --git a/flip1.c b/flip1.c
index 44155ca8..965e5ab1 100644
--- a/flip1.c
+++ b/flip1.c
@@ -239,18 +239,16 @@ int flip1_initialize(PROGRAMMER* pgm, AVRPART *part)
   if (usbpid) {
     pid = *(int *)(ldata(usbpid));
     if (lnext(usbpid))
-      fprintf(stderr,
-	      "%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
-	      progname, pid);
+      avrdude_message("%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
+                      progname, pid);
   } else {
     pid = part->usbpid;
   }
   if (!ovsigck && (part->flags & AVRPART_HAS_PDI)) {
-    fprintf(stderr,
-            "%s: \"flip1\" (FLIP protocol version 1) is for AT90USB* and ATmega*U* devices.\n"
-            "%s For Xmega devices, use \"flip2\".\n"
-            "%s (Use -F to bypass this check.)\n",
-            progname, progbuf, progbuf);
+    avrdude_message("%s: \"flip1\" (FLIP protocol version 1) is for AT90USB* and ATmega*U* devices.\n"
+                    "%s For Xmega devices, use \"flip2\".\n"
+                    "%s (Use -F to bypass this check.)\n",
+                    progname, progbuf, progbuf);
     return -1;
   }
 
@@ -262,31 +260,31 @@ int flip1_initialize(PROGRAMMER* pgm, AVRPART *part)
   /* Check if descriptor values are what we expect. */
 
   if (dfu->dev_desc.idVendor != vid)
-    fprintf( stderr, "%s: Warning: USB idVendor = 0x%04X (expected 0x%04X)\n",
+    avrdude_message("%s: Warning: USB idVendor = 0x%04X (expected 0x%04X)\n",
       progname, dfu->dev_desc.idVendor, vid);
 
   if (pid != 0 && dfu->dev_desc.idProduct != pid)
-    fprintf( stderr, "%s: Warning: USB idProduct = 0x%04X (expected 0x%04X)\n",
+    avrdude_message("%s: Warning: USB idProduct = 0x%04X (expected 0x%04X)\n",
       progname, dfu->dev_desc.idProduct, pid);
 
   if (dfu->dev_desc.bNumConfigurations != 1)
-    fprintf( stderr, "%s: Warning: USB bNumConfigurations = %d (expected 1)\n",
+    avrdude_message("%s: Warning: USB bNumConfigurations = %d (expected 1)\n",
       progname, (int) dfu->dev_desc.bNumConfigurations);
 
   if (dfu->conf_desc.bNumInterfaces != 1)
-    fprintf( stderr, "%s: Warning: USB bNumInterfaces = %d (expected 1)\n",
+    avrdude_message("%s: Warning: USB bNumInterfaces = %d (expected 1)\n",
       progname, (int) dfu->conf_desc.bNumInterfaces);
 
   if (dfu->dev_desc.bDeviceClass != 254)
-    fprintf( stderr, "%s: Warning: USB bDeviceClass = %d (expected 254)\n",
+    avrdude_message("%s: Warning: USB bDeviceClass = %d (expected 254)\n",
       progname, (int) dfu->dev_desc.bDeviceClass);
 
   if (dfu->dev_desc.bDeviceSubClass != 1)
-    fprintf( stderr, "%s: Warning: USB bDeviceSubClass = %d (expected 1)\n",
+    avrdude_message("%s: Warning: USB bDeviceSubClass = %d (expected 1)\n",
       progname, (int) dfu->dev_desc.bDeviceSubClass);
 
   if (dfu->dev_desc.bDeviceProtocol != 0)
-    fprintf( stderr, "%s: Warning: USB bDeviceProtocol = %d (expected 0)\n",
+    avrdude_message("%s: Warning: USB bDeviceProtocol = %d (expected 0)\n",
       progname, (int) dfu->dev_desc.bDeviceProtocol);
 
   /*
@@ -297,20 +295,20 @@ int flip1_initialize(PROGRAMMER* pgm, AVRPART *part)
    */
   if (0) {
   if (dfu->intf_desc.bInterfaceClass != 254)
-    fprintf( stderr, "%s: Warning: USB bInterfaceClass = %d (expected 254)\n",
+    avrdude_message("%s: Warning: USB bInterfaceClass = %d (expected 254)\n",
       progname, (int) dfu->intf_desc.bInterfaceClass);
 
   if (dfu->intf_desc.bInterfaceSubClass != 1)
-    fprintf( stderr, "%s: Warning: USB bInterfaceSubClass = %d (expected 1)\n",
+    avrdude_message("%s: Warning: USB bInterfaceSubClass = %d (expected 1)\n",
       progname, (int) dfu->intf_desc.bInterfaceSubClass);
 
   if (dfu->intf_desc.bInterfaceProtocol != 0)
-    fprintf( stderr, "%s: Warning: USB bInterfaceSubClass = %d (expected 0)\n",
+    avrdude_message("%s: Warning: USB bInterfaceSubClass = %d (expected 0)\n",
       progname, (int) dfu->intf_desc.bInterfaceProtocol);
   }
 
   if (dfu->dev_desc.bMaxPacketSize0 != 32)
-    fprintf( stderr, "%s: Warning: bMaxPacketSize0 (%d) != 32, things might go wrong\n",
+    avrdude_message("%s: Warning: bMaxPacketSize0 (%d) != 32, things might go wrong\n",
       progname, dfu->dev_desc.bMaxPacketSize0);
 
   if (verbose)
@@ -367,7 +365,7 @@ int flip1_chip_erase(PROGRAMMER* pgm, AVRPART *part)
   unsigned int default_timeout = FLIP1(pgm)->dfu->timeout;
 
   if (verbose > 1)
-    fprintf(stderr, "%s: flip_chip_erase()\n", progname);
+    avrdude_message("%s: flip_chip_erase()\n", progname);
 
   struct flip1_cmd cmd = {
     FLIP1_CMD_WRITE_COMMAND, { 0, 0xff }
@@ -382,7 +380,7 @@ int flip1_chip_erase(PROGRAMMER* pgm, AVRPART *part)
     return -1;
 
   if (status.bStatus != DFU_STATUS_OK) {
-    fprintf(stderr, "%s: failed to send chip erase command: %s\n",
+    avrdude_message("%s: failed to send chip erase command: %s\n",
             progname, flip1_status_str(&status));
     if (status.bState == STATE_dfuERROR)
       dfu_clrstatus(FLIP1(pgm)->dfu);
@@ -404,7 +402,7 @@ int flip1_read_byte(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
     if (flip1_read_sig_bytes(pgm, part, mem) < 0)
       return -1;
     if (addr > mem->size) {
-      fprintf(stderr, "%s: flip1_read_byte(signature): address %lu out of range\n",
+      avrdude_message("%s: flip1_read_byte(signature): address %lu out of range\n",
               progname, addr);
       return -1;
     }
@@ -415,10 +413,10 @@ int flip1_read_byte(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
   mem_unit = flip1_mem_unit(mem->desc);
 
   if (mem_unit == FLIP1_MEM_UNIT_UNKNOWN) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "\"%s\" memory not accessible using FLIP",
       progname, mem->desc);
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
     return -1;
   }
 
@@ -440,10 +438,10 @@ int flip1_write_byte(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
   mem_unit = flip1_mem_unit(mem->desc);
 
   if (mem_unit == FLIP1_MEM_UNIT_UNKNOWN) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "\"%s\" memory not accessible using FLIP",
       progname, mem->desc);
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
     return -1;
   }
 
@@ -461,10 +459,10 @@ int flip1_paged_load(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
   mem_unit = flip1_mem_unit(mem->desc);
 
   if (mem_unit == FLIP1_MEM_UNIT_UNKNOWN) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "\"%s\" memory not accessible using FLIP",
       progname, mem->desc);
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
     return -1;
   }
 
@@ -487,16 +485,16 @@ int flip1_paged_write(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
   mem_unit = flip1_mem_unit(mem->desc);
 
   if (mem_unit == FLIP1_MEM_UNIT_UNKNOWN) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "\"%s\" memory not accessible using FLIP",
       progname, mem->desc);
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
     return -1;
   }
 
   if (n_bytes > INT_MAX) {
     /* This should never happen, unless the int type is only 16 bits. */
-    fprintf(stderr, "%s: Error: Attempting to read more than %d bytes\n",
+    avrdude_message("%s: Error: Attempting to read more than %d bytes\n",
       progname, INT_MAX);
     exit(1);
   }
@@ -510,13 +508,13 @@ int flip1_paged_write(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
 int flip1_read_sig_bytes(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem)
 {
   if (verbose > 1)
-    fprintf(stderr, "%s: flip1_read_sig_bytes(): ", progname);
+    avrdude_message("%s: flip1_read_sig_bytes(): ", progname);
 
   if (FLIP1(pgm)->dfu == NULL)
     return -1;
 
   if (mem->size < sizeof(FLIP1(pgm)->part_sig)) {
-    fprintf(stderr, "%s: Error: Signature read must be at least %u bytes\n",
+    avrdude_message("%s: Error: Signature read must be at least %u bytes\n",
       progname, (unsigned int) sizeof(FLIP1(pgm)->part_sig));
     return -1;
   }
@@ -535,7 +533,7 @@ int flip1_read_sig_bytes(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem)
     };
 
     if (verbose > 1)
-      fprintf(stderr, "from device\n");
+      avrdude_message("from device\n");
 
     for (i = 0; i < 3; i++)
     {
@@ -552,7 +550,7 @@ int flip1_read_sig_bytes(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem)
 
       if (status.bStatus != DFU_STATUS_OK)
       {
-        fprintf(stderr, "%s: failed to send cmd for signature byte %d: %s\n",
+        avrdude_message("%s: failed to send cmd for signature byte %d: %s\n",
                 progname, i, flip1_status_str(&status));
         if (status.bState == STATE_dfuERROR)
           dfu_clrstatus(FLIP1(pgm)->dfu);
@@ -567,7 +565,7 @@ int flip1_read_sig_bytes(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem)
 
       if (status.bStatus != DFU_STATUS_OK)
       {
-        fprintf(stderr, "%s: failed to read signature byte %d: %s\n",
+        avrdude_message("%s: failed to read signature byte %d: %s\n",
                 progname, i, flip1_status_str(&status));
         if (status.bState == STATE_dfuERROR)
           dfu_clrstatus(FLIP1(pgm)->dfu);
@@ -578,7 +576,7 @@ int flip1_read_sig_bytes(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem)
   else
   {
     if (verbose > 1)
-      fprintf(stderr, "cached\n");
+      avrdude_message("cached\n");
   }
 
   memcpy(mem->buf, FLIP1(pgm)->part_sig, sizeof(FLIP1(pgm)->part_sig));
@@ -591,7 +589,7 @@ void flip1_setup(PROGRAMMER * pgm)
   pgm->cookie = calloc(1, sizeof(struct flip1));
 
   if (pgm->cookie == NULL) {
-    fprintf(stderr, "%s: Out of memory allocating private data structure\n",
+    avrdude_message("%s: Out of memory allocating private data structure\n",
             progname);
     exit(1);
   }
@@ -609,7 +607,7 @@ void flip1_teardown(PROGRAMMER * pgm)
 void flip1_show_info(struct flip1 *flip1)
 {
   dfu_show_info(flip1->dfu);
-  fprintf(stderr, "    USB max packet size : %hu\n",
+  avrdude_message("    USB max packet size : %hu\n",
     (unsigned short) flip1->dfu->dev_desc.bMaxPacketSize0);
 }
 
@@ -628,9 +626,8 @@ int flip1_read_memory(PROGRAMMER * pgm,
 
 
   if (verbose > 1)
-    fprintf(stderr,
-            "%s: flip_read_memory(%s, 0x%04x, %d)\n",
-            progname, flip1_mem_unit_str(mem_unit), addr, size);
+    avrdude_message("%s: flip_read_memory(%s, 0x%04x, %d)\n",
+                    progname, flip1_mem_unit_str(mem_unit), addr, size);
 
   /*
    * As this function is called once per page, no need to handle 64
@@ -660,7 +657,7 @@ int flip1_read_memory(PROGRAMMER * pgm,
 
   if (status.bStatus != DFU_STATUS_OK)
   {
-    fprintf(stderr, "%s: failed to read %u bytes of %s memory @%u: %s\n",
+    avrdude_message("%s: failed to read %u bytes of %s memory @%u: %s\n",
             progname, size, flip1_mem_unit_str(mem_unit), addr,
             flip1_status_str(&status));
     if (status.bState == STATE_dfuERROR)
@@ -674,8 +671,7 @@ int flip1_read_memory(PROGRAMMER * pgm,
   if (cmd_result < 0 && aux_result == 0 &&
       status.bStatus == DFU_STATUS_ERR_WRITE) {
     if (FLIP1(pgm)->security_mode_flag == 0)
-      fprintf(stderr,
-              "\n%s:\n"
+      avrdude_message("\n%s:\n"
               "%s***********************************************************************\n"
               "%sMaybe the device is in ``security mode´´, and needs a chip erase first?\n"
               "%s***********************************************************************\n"
@@ -689,7 +685,7 @@ int flip1_read_memory(PROGRAMMER * pgm,
 
   if (status.bStatus != DFU_STATUS_OK)
   {
-    fprintf(stderr, "%s: failed to read %u bytes of %s memory @%u: %s\n",
+    avrdude_message("%s: failed to read %u bytes of %s memory @%u: %s\n",
             progname, size, flip1_mem_unit_str(mem_unit), addr,
             flip1_status_str(&status));
     if (status.bState == STATE_dfuERROR)
@@ -724,16 +720,14 @@ int flip1_write_memory(struct dfu_dev *dfu,
   unsigned char *buf;
 
   if (verbose > 1)
-    fprintf(stderr,
-            "%s: flip_write_memory(%s, 0x%04x, %d)\n",
-            progname, flip1_mem_unit_str(mem_unit), addr, size);
+    avrdude_message("%s: flip_write_memory(%s, 0x%04x, %d)\n",
+                    progname, flip1_mem_unit_str(mem_unit), addr, size);
 
   if (size < 32) {
     /* presumably single-byte updates; must be padded to USB endpoint size */
     if ((addr + size - 1) / 32 != addr / 32) {
-      fprintf(stderr,
-              "%s: flip_write_memory(): begin (0x%x) and end (0x%x) not within same 32-byte block\n",
-              progname, addr, addr + size - 1);
+      avrdude_message("%s: flip_write_memory(): begin (0x%x) and end (0x%x) not within same 32-byte block\n",
+                      progname, addr, addr + size - 1);
       return -1;
     }
     write_size = 32;
@@ -744,7 +738,7 @@ int flip1_write_memory(struct dfu_dev *dfu,
   if ((buf = malloc(sizeof(struct flip1_cmd_header) +
                     write_size +
                     sizeof(struct flip1_prog_footer))) == 0) {
-    fprintf(stderr, "%s: Out of memory\n", progname);
+    avrdude_message("%s: Out of memory\n", progname);
     return -1;
   }
 
@@ -793,7 +787,7 @@ int flip1_write_memory(struct dfu_dev *dfu,
 
   if (status.bStatus != DFU_STATUS_OK)
   {
-    fprintf(stderr, "%s: failed to write %u bytes of %s memory @%u: %s\n",
+    avrdude_message("%s: failed to write %u bytes of %s memory @%u: %s\n",
             progname, size, flip1_mem_unit_str(mem_unit), addr,
             flip1_status_str(&status));
     if (status.bState == STATE_dfuERROR)
@@ -824,7 +818,7 @@ int flip1_set_mem_page(struct dfu_dev *dfu,
 
   if (status.bStatus != DFU_STATUS_OK)
   {
-    fprintf(stderr, "%s: failed to set memory page: %s\n",
+    avrdude_message("%s: failed to set memory page: %s\n",
             progname, flip1_status_str(&status));
     if (status.bState == STATE_dfuERROR)
       dfu_clrstatus(dfu);
diff --git a/flip2.c b/flip2.c
index 0e72c2b5..c2156e09 100644
--- a/flip2.c
+++ b/flip2.c
@@ -233,19 +233,17 @@ int flip2_initialize(PROGRAMMER* pgm, AVRPART *part)
   if (usbpid) {
     pid = *(int *)(ldata(usbpid));
     if (lnext(usbpid))
-      fprintf(stderr,
-	      "%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
-	      progname, pid);
+      avrdude_message("%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
+                      progname, pid);
   } else {
     pid = part->usbpid;
   }
 
   if (!ovsigck && !(part->flags & AVRPART_HAS_PDI)) {
-    fprintf(stderr,
-            "%s: \"flip2\" (FLIP protocol version 2) is for Xmega devices.\n"
-            "%s For AT90USB* or ATmega*U* devices, use \"flip1\".\n"
-            "%s (Use -F to bypass this check.)\n",
-            progname, progbuf, progbuf);
+    avrdude_message("%s: \"flip2\" (FLIP protocol version 2) is for Xmega devices.\n"
+                    "%s For AT90USB* or ATmega*U* devices, use \"flip1\".\n"
+                    "%s (Use -F to bypass this check.)\n",
+                    progname, progbuf, progbuf);
     return -1;
   }
 
@@ -257,43 +255,43 @@ int flip2_initialize(PROGRAMMER* pgm, AVRPART *part)
   /* Check if descriptor values are what we expect. */
 
   if (dfu->dev_desc.idVendor != vid)
-    fprintf( stderr, "%s: Warning: USB idVendor = 0x%04X (expected 0x%04X)\n",
+    avrdude_message("%s: Warning: USB idVendor = 0x%04X (expected 0x%04X)\n",
       progname, dfu->dev_desc.idVendor, vid);
 
   if (pid != 0 && dfu->dev_desc.idProduct != pid)
-    fprintf( stderr, "%s: Warning: USB idProduct = 0x%04X (expected 0x%04X)\n",
+    avrdude_message("%s: Warning: USB idProduct = 0x%04X (expected 0x%04X)\n",
       progname, dfu->dev_desc.idProduct, pid);
 
   if (dfu->dev_desc.bNumConfigurations != 1)
-    fprintf( stderr, "%s: Warning: USB bNumConfigurations = %d (expected 1)\n",
+    avrdude_message("%s: Warning: USB bNumConfigurations = %d (expected 1)\n",
       progname, (int) dfu->dev_desc.bNumConfigurations);
 
   if (dfu->conf_desc.bNumInterfaces != 1)
-    fprintf( stderr, "%s: Warning: USB bNumInterfaces = %d (expected 1)\n",
+    avrdude_message("%s: Warning: USB bNumInterfaces = %d (expected 1)\n",
       progname, (int) dfu->conf_desc.bNumInterfaces);
 
   if (dfu->dev_desc.bDeviceClass != 0)
-    fprintf( stderr, "%s: Warning: USB bDeviceClass = %d (expected 0)\n",
+    avrdude_message("%s: Warning: USB bDeviceClass = %d (expected 0)\n",
       progname, (int) dfu->dev_desc.bDeviceClass);
 
   if (dfu->dev_desc.bDeviceSubClass != 0)
-    fprintf( stderr, "%s: Warning: USB bDeviceSubClass = %d (expected 0)\n",
+    avrdude_message("%s: Warning: USB bDeviceSubClass = %d (expected 0)\n",
       progname, (int) dfu->dev_desc.bDeviceSubClass);
 
   if (dfu->dev_desc.bDeviceProtocol != 0)
-    fprintf( stderr, "%s: Warning: USB bDeviceProtocol = %d (expected 0)\n",
+    avrdude_message("%s: Warning: USB bDeviceProtocol = %d (expected 0)\n",
       progname, (int) dfu->dev_desc.bDeviceProtocol);
 
   if (dfu->intf_desc.bInterfaceClass != 0xFF)
-    fprintf( stderr, "%s: Warning: USB bInterfaceClass = %d (expected 255)\n",
+    avrdude_message("%s: Warning: USB bInterfaceClass = %d (expected 255)\n",
       progname, (int) dfu->intf_desc.bInterfaceClass);
 
   if (dfu->intf_desc.bInterfaceSubClass != 0)
-    fprintf( stderr, "%s: Warning: USB bInterfaceSubClass = %d (expected 0)\n",
+    avrdude_message("%s: Warning: USB bInterfaceSubClass = %d (expected 0)\n",
       progname, (int) dfu->intf_desc.bInterfaceSubClass);
 
   if (dfu->intf_desc.bInterfaceProtocol != 0)
-    fprintf( stderr, "%s: Warning: USB bInterfaceSubClass = %d (expected 0)\n",
+    avrdude_message("%s: Warning: USB bInterfaceSubClass = %d (expected 0)\n",
       progname, (int) dfu->intf_desc.bInterfaceProtocol);
 
   result = flip2_read_memory(FLIP2(pgm)->dfu,
@@ -359,7 +357,7 @@ int flip2_chip_erase(PROGRAMMER* pgm, AVRPART *part)
   int aux_result;
 
   if (verbose > 1)
-    fprintf(stderr, "%s: flip_chip_erase()\n", progname);
+    avrdude_message("%s: flip_chip_erase()\n", progname);
 
   struct flip2_cmd cmd = {
     FLIP2_CMD_GROUP_EXEC, FLIP2_CMD_CHIP_ERASE, { 0xFF, 0, 0, 0 }
@@ -378,7 +376,7 @@ int flip2_chip_erase(PROGRAMMER* pgm, AVRPART *part)
       {
         continue;
       } else
-        fprintf(stderr, "%s: Error: DFU status %s\n", progname,
+        avrdude_message("%s: Error: DFU status %s\n", progname,
           flip2_status_str(&status));
       dfu_clrstatus(FLIP2(pgm)->dfu);
     } else
@@ -399,12 +397,12 @@ int flip2_read_byte(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
   mem_unit = flip2_mem_unit(mem->desc);
 
   if (mem_unit == FLIP2_MEM_UNIT_UNKNOWN) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "\"%s\" memory not accessible using FLIP",
       progname, mem->desc);
     if (strcmp(mem->desc, "flash") == 0)
-      fprintf(stderr, " (did you mean \"application\"?)");
-    fprintf(stderr, "\n");
+      avrdude_message(" (did you mean \"application\"?)");
+    avrdude_message("\n");
     return -1;
   }
 
@@ -422,12 +420,12 @@ int flip2_write_byte(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
   mem_unit = flip2_mem_unit(mem->desc);
 
   if (mem_unit == FLIP2_MEM_UNIT_UNKNOWN) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "\"%s\" memory not accessible using FLIP",
       progname, mem->desc);
     if (strcmp(mem->desc, "flash") == 0)
-      fprintf(stderr, " (did you mean \"application\"?)");
-    fprintf(stderr, "\n");
+      avrdude_message(" (did you mean \"application\"?)");
+    avrdude_message("\n");
     return -1;
   }
 
@@ -446,18 +444,18 @@ int flip2_paged_load(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
   mem_unit = flip2_mem_unit(mem->desc);
 
   if (mem_unit == FLIP2_MEM_UNIT_UNKNOWN) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "\"%s\" memory not accessible using FLIP",
       progname, mem->desc);
     if (strcmp(mem->desc, "flash") == 0)
-      fprintf(stderr, " (did you mean \"application\"?)");
-    fprintf(stderr, "\n");
+      avrdude_message(" (did you mean \"application\"?)");
+    avrdude_message("\n");
     return -1;
   }
 
   if (n_bytes > INT_MAX) {
     /* This should never happen, unless the int type is only 16 bits. */
-    fprintf(stderr, "%s: Error: Attempting to read more than %d bytes\n",
+    avrdude_message("%s: Error: Attempting to read more than %d bytes\n",
       progname, INT_MAX);
     exit(1);
   }
@@ -480,18 +478,18 @@ int flip2_paged_write(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem,
   mem_unit = flip2_mem_unit(mem->desc);
 
   if (mem_unit == FLIP2_MEM_UNIT_UNKNOWN) {
-    fprintf(stderr, "%s: Error: "
+    avrdude_message("%s: Error: "
       "\"%s\" memory not accessible using FLIP",
       progname, mem->desc);
     if (strcmp(mem->desc, "flash") == 0)
-      fprintf(stderr, " (did you mean \"application\"?)");
-    fprintf(stderr, "\n");
+      avrdude_message(" (did you mean \"application\"?)");
+    avrdude_message("\n");
     return -1;
   }
 
   if (n_bytes > INT_MAX) {
     /* This should never happen, unless the int type is only 16 bits. */
-    fprintf(stderr, "%s: Error: Attempting to read more than %d bytes\n",
+    avrdude_message("%s: Error: Attempting to read more than %d bytes\n",
       progname, INT_MAX);
     exit(1);
   }
@@ -508,7 +506,7 @@ int flip2_read_sig_bytes(PROGRAMMER* pgm, AVRPART *part, AVRMEM *mem)
     return -1;
 
   if (mem->size < sizeof(FLIP2(pgm)->part_sig)) {
-    fprintf(stderr, "%s: Error: Signature read must be at least %u bytes\n",
+    avrdude_message("%s: Error: Signature read must be at least %u bytes\n",
       progname, (unsigned int) sizeof(FLIP2(pgm)->part_sig));
     return -1;
   }
@@ -522,7 +520,7 @@ void flip2_setup(PROGRAMMER * pgm)
   pgm->cookie = calloc(1, sizeof(struct flip2));
 
   if (pgm->cookie == NULL) {
-    fprintf(stderr, "%s: Out of memory allocating private data structure\n",
+    avrdude_message("%s: Out of memory allocating private data structure\n",
             progname);
     exit(1);
   }
@@ -541,24 +539,24 @@ void flip2_show_info(struct flip2 *flip2)
 {
   dfu_show_info(flip2->dfu);
 
-  fprintf(stderr, "    Part signature      : 0x%02X%02X%02X\n",
+  avrdude_message("    Part signature      : 0x%02X%02X%02X\n",
     (int) flip2->part_sig[0],
     (int) flip2->part_sig[1],
     (int) flip2->part_sig[2]);
 
   if (flip2->part_rev < 26)
-    fprintf(stderr, "    Part revision       : %c\n",
+    avrdude_message("    Part revision       : %c\n",
       (char) (flip2->part_rev + 'A'));
   else
-    fprintf(stderr, "    Part revision       : %c%c\n",
+    avrdude_message("    Part revision       : %c%c\n",
       (char) (flip2->part_rev / 26 - 1 + 'A'),
       (char) (flip2->part_rev % 26 + 'A'));
 
-  fprintf(stderr, "    Bootloader version  : 2.%hu.%hu\n",
+  avrdude_message("    Bootloader version  : 2.%hu.%hu\n",
     ((unsigned short) flip2->boot_ver >> 4) & 0xF,
     ((unsigned short) flip2->boot_ver >> 0) & 0xF);
 
-  fprintf(stderr, "    USB max packet size : %hu\n",
+  avrdude_message("    USB max packet size : %hu\n",
     (unsigned short) flip2->dfu->dev_desc.bMaxPacketSize0);
 }
 
@@ -572,18 +570,17 @@ int flip2_read_memory(struct dfu_dev *dfu,
   int result;
 
   if (verbose > 1)
-    fprintf(stderr,
-            "%s: flip_read_memory(%s, 0x%04x, %d)\n",
-            progname, flip2_mem_unit_str(mem_unit), addr, size);
+    avrdude_message("%s: flip_read_memory(%s, 0x%04x, %d)\n",
+                    progname, flip2_mem_unit_str(mem_unit), addr, size);
 
   result = flip2_set_mem_unit(dfu, mem_unit);
 
   if (result != 0) {
     if ((mem_name = flip2_mem_unit_str(mem_unit)) != NULL)
-      fprintf(stderr, "%s: Error: Failed to set memory unit 0x%02X (%s)\n",
+      avrdude_message("%s: Error: Failed to set memory unit 0x%02X (%s)\n",
         progname, (int) mem_unit, mem_name);
     else
-      fprintf(stderr, "%s: Error: Failed to set memory unit 0x%02X\n",
+      avrdude_message("%s: Error: Failed to set memory unit 0x%02X\n",
         progname, (int) mem_unit);
     return -1;
   }
@@ -592,7 +589,7 @@ int flip2_read_memory(struct dfu_dev *dfu,
   result = flip2_set_mem_page(dfu, page_addr);
 
   if (result != 0) {
-    fprintf(stderr, "%s: Error: Failed to set memory page 0x%04hX\n",
+    avrdude_message("%s: Error: Failed to set memory page 0x%04hX\n",
         progname, page_addr);
     return -1;
   }
@@ -604,7 +601,7 @@ int flip2_read_memory(struct dfu_dev *dfu,
     if (page_addr != prev_page_addr) {
       result = flip2_set_mem_page(dfu, page_addr);
       if (result != 0) {
-        fprintf(stderr, "%s: Error: Failed to set memory page 0x%04hX\n",
+        avrdude_message("%s: Error: Failed to set memory page 0x%04hX\n",
             progname, page_addr);
         return -1;
       }
@@ -614,7 +611,7 @@ int flip2_read_memory(struct dfu_dev *dfu,
     result = flip2_read_max1k(dfu, addr & 0xFFFF, ptr, read_size);
 
     if (result != 0) {
-      fprintf(stderr, "%s: Error: Failed to read 0x%04X bytes at 0x%04lX\n",
+      avrdude_message("%s: Error: Failed to read 0x%04X bytes at 0x%04lX\n",
           progname, read_size, (unsigned long) addr);
       return -1;
     }
@@ -637,18 +634,17 @@ int flip2_write_memory(struct dfu_dev *dfu,
   int result;
 
   if (verbose > 1)
-    fprintf(stderr,
-            "%s: flip_write_memory(%s, 0x%04x, %d)\n",
-            progname, flip2_mem_unit_str(mem_unit), addr, size);
+    avrdude_message("%s: flip_write_memory(%s, 0x%04x, %d)\n",
+                    progname, flip2_mem_unit_str(mem_unit), addr, size);
 
   result = flip2_set_mem_unit(dfu, mem_unit);
 
   if (result != 0) {
     if ((mem_name = flip2_mem_unit_str(mem_unit)) != NULL)
-      fprintf(stderr, "%s: Error: Failed to set memory unit 0x%02X (%s)\n",
+      avrdude_message("%s: Error: Failed to set memory unit 0x%02X (%s)\n",
         progname, (int) mem_unit, mem_name);
     else
-      fprintf(stderr, "%s: Error: Failed to set memory unit 0x%02X\n",
+      avrdude_message("%s: Error: Failed to set memory unit 0x%02X\n",
         progname, (int) mem_unit);
     return -1;
   }
@@ -657,7 +653,7 @@ int flip2_write_memory(struct dfu_dev *dfu,
   result = flip2_set_mem_page(dfu, page_addr);
 
   if (result != 0) {
-    fprintf(stderr, "%s: Error: Failed to set memory page 0x%04hX\n",
+    avrdude_message("%s: Error: Failed to set memory page 0x%04hX\n",
         progname, page_addr);
     return -1;
   }
@@ -669,7 +665,7 @@ int flip2_write_memory(struct dfu_dev *dfu,
     if (page_addr != prev_page_addr) {
       result = flip2_set_mem_page(dfu, page_addr);
       if (result != 0) {
-        fprintf(stderr, "%s: Error: Failed to set memory page 0x%04hX\n",
+        avrdude_message("%s: Error: Failed to set memory page 0x%04hX\n",
             progname, page_addr);
         return -1;
       }
@@ -679,7 +675,7 @@ int flip2_write_memory(struct dfu_dev *dfu,
     result = flip2_write_max1k(dfu, addr & 0xFFFF, ptr, write_size);
 
     if (result != 0) {
-      fprintf(stderr, "%s: Error: Failed to write 0x%04X bytes at 0x%04lX\n",
+      avrdude_message("%s: Error: Failed to write 0x%04X bytes at 0x%04lX\n",
           progname, write_size, (unsigned long) addr);
       return -1;
     }
@@ -716,10 +712,10 @@ int flip2_set_mem_unit(struct dfu_dev *dfu, enum flip2_mem_unit mem_unit)
     if (status.bStatus == ((FLIP2_STATUS_OUTOFRANGE >> 8) & 0xFF) &&
         status.bState == ((FLIP2_STATUS_OUTOFRANGE >> 0) & 0xFF))
     {
-      fprintf(stderr, "%s: Error: Unknown memory unit (0x%02x)\n",
+      avrdude_message("%s: Error: Unknown memory unit (0x%02x)\n",
         progname, (unsigned int) mem_unit);
     } else
-      fprintf(stderr, "%s: Error: DFU status %s\n", progname,
+      avrdude_message("%s: Error: DFU status %s\n", progname,
         flip2_status_str(&status));
     dfu_clrstatus(dfu);
   }
@@ -753,10 +749,10 @@ int flip2_set_mem_page(struct dfu_dev *dfu,
     if (status.bStatus == ((FLIP2_STATUS_OUTOFRANGE >> 8) & 0xFF) &&
         status.bState == ((FLIP2_STATUS_OUTOFRANGE >> 0) & 0xFF))
     {
-      fprintf(stderr, "%s: Error: Page address out of range (0x%04hx)\n",
+      avrdude_message("%s: Error: Page address out of range (0x%04hx)\n",
         progname, page_addr);
     } else
-      fprintf(stderr, "%s: Error: DFU status %s\n", progname,
+      avrdude_message("%s: Error: DFU status %s\n", progname,
         flip2_status_str(&status));
     dfu_clrstatus(dfu);
   }
@@ -798,10 +794,10 @@ flip2_read_max1k_status:
     if (status.bStatus == ((FLIP2_STATUS_OUTOFRANGE >> 8) & 0xFF) &&
         status.bState == ((FLIP2_STATUS_OUTOFRANGE >> 0) & 0xFF))
     {
-      fprintf(stderr, "%s: Error: Address out of range [0x%04hX,0x%04hX]\n",
+      avrdude_message("%s: Error: Address out of range [0x%04hX,0x%04hX]\n",
         progname, offset, offset+size-1);
     } else
-      fprintf(stderr, "%s: Error: DFU status %s\n", progname,
+      avrdude_message("%s: Error: DFU status %s\n", progname,
         flip2_status_str(&status));
     dfu_clrstatus(dfu);
   }
@@ -828,7 +824,7 @@ int flip2_write_max1k(struct dfu_dev *dfu,
   cmd.args[3] = ((offset+size-1) >> 0) & 0xFF;
 
   if (size > 0x400) {
-    fprintf(stderr, "%s: Error: Write block too large (%hu > 1024)\n",
+    avrdude_message("%s: Error: Write block too large (%hu > 1024)\n",
       progname, size);
     return -1;
   }
@@ -859,10 +855,10 @@ int flip2_write_max1k(struct dfu_dev *dfu,
     if (status.bStatus == ((FLIP2_STATUS_OUTOFRANGE >> 8) & 0xFF) &&
         status.bState == ((FLIP2_STATUS_OUTOFRANGE >> 0) & 0xFF))
     {
-      fprintf(stderr, "%s: Error: Address out of range [0x%04hX,0x%04hX]\n",
+      avrdude_message("%s: Error: Address out of range [0x%04hX,0x%04hX]\n",
         progname, offset, offset+size-1);
     } else
-      fprintf(stderr, "%s: Error: DFU status %s\n", progname,
+      avrdude_message("%s: Error: DFU status %s\n", progname,
         flip2_status_str(&status));
     dfu_clrstatus(dfu);
   }
diff --git a/ft245r.c b/ft245r.c
index 4874afc7..d99855a5 100644
--- a/ft245r.c
+++ b/ft245r.c
@@ -92,8 +92,7 @@
 #ifndef HAVE_PTHREAD_H
 
 static int ft245r_nopthread_open (struct programmer_t *pgm, char * name) {
-    fprintf(stderr,
-            "%s: error: no pthread support. Please compile again with pthread installed."
+    avrdude_message("%s: error: no pthread support. Please compile again with pthread installed."
 #if defined(_WIN32)
             " See http://sourceware.org/pthreads-win32/."
 #endif
@@ -111,9 +110,8 @@ void ft245r_initpgm(PROGRAMMER * pgm) {
 #elif defined(DO_NOT_BUILD_FT245R)
 
 static int ft245r_noftdi_open (struct programmer_t *pgm, char * name) {
-    fprintf(stderr,
-            "%s: error: no libftdi or libusb support. Install libftdi1/libusb-1.0 or libftdi/libusb and run configure/make again.\n",
-            progname);
+    avrdude_message("%s: error: no libftdi or libusb support. Install libftdi1/libusb-1.0 or libftdi/libusb and run configure/make again.\n",
+                    progname);
 
     return -1;
 }
@@ -170,7 +168,7 @@ static void add_to_buf (unsigned char c) {
     else                      nh = head + 1;
 
     if (nh == tail) {
-        fprintf (stderr, "buffer overflow. Cannot happen!\n");
+        avrdude_message("buffer overflow. Cannot happen!\n");
     }
     buffer[head] = c;
     head = nh;
@@ -240,7 +238,7 @@ static int ft245r_chip_erase(PROGRAMMER * pgm, AVRPART * p) {
     unsigned char res[4];
 
     if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
-        fprintf(stderr, "chip erase instruction not defined for part \"%s\"\n",
+        avrdude_message("chip erase instruction not defined for part \"%s\"\n",
                 p->desc);
         return -1;
     }
@@ -266,12 +264,12 @@ static int ft245r_set_bitclock(PROGRAMMER * pgm) {
     }
 
     if ((verbose>1) || FT245R_DEBUG) {
-        fprintf(stderr," ft245r:  spi bitclk %d -> ft baudrate %d\n",
+        avrdude_message(" ft245r:  spi bitclk %d -> ft baudrate %d\n",
                 rate / 2, rate);
     }
     r = ftdi_set_baudrate(handle, rate);
     if (r) {
-        fprintf(stderr, "Set baudrate (%d) failed with error '%s'.\n",
+        avrdude_message("Set baudrate (%d) failed with error '%s'.\n",
                 rate, ftdi_get_error_string (handle));
         return -1;
     }
@@ -378,8 +376,8 @@ static int ft245r_program_enable(PROGRAMMER * pgm, AVRPART * p) {
     int i;
 
     if (p->op[AVR_OP_PGM_ENABLE] == NULL) {
-        fprintf(stderr,
-                "%s: AVR_OP_PGM_ENABLE command not defined for %s\n", progname, p->desc);
+        avrdude_message("%s: AVR_OP_PGM_ENABLE command not defined for %s\n",
+                        progname, p->desc);
         fflush(stderr);
         return -1;
     }
@@ -392,8 +390,8 @@ static int ft245r_program_enable(PROGRAMMER * pgm, AVRPART * p) {
         if (res[p->pollindex-1] == p->pollvalue) return 0;
 
         if ((verbose>=1) || FT245R_DEBUG) {
-            fprintf(stderr,
-                    "%s: Program enable command not successful. Retrying.\n", progname);
+            avrdude_message("%s: Program enable command not successful. Retrying.\n",
+                            progname);
             fflush(stderr);
         }
         set_pin(pgm, PIN_AVR_RESET, ON);
@@ -406,8 +404,8 @@ static int ft245r_program_enable(PROGRAMMER * pgm, AVRPART * p) {
         }
     }
 
-    fprintf(stderr,
-            "%s: Device is not responding to program enable. Check connection.\n", progname);
+    avrdude_message("%s: Device is not responding to program enable. Check connection.\n",
+                    progname);
     fflush(stderr);
 
     return -1;
@@ -546,9 +544,8 @@ static int ft245r_open(PROGRAMMER * pgm, char * port) {
             }
         }
         if (devnum < 0) {
-            fprintf(stderr,
-                    "%s: invalid portname '%s': use 'ft[0-9]+'\n",
-                    progname,port);
+            avrdude_message("%s: invalid portname '%s': use 'ft[0-9]+'\n",
+                            progname,port);
             return -1;
         }
     } else {
@@ -562,8 +559,7 @@ static int ft245r_open(PROGRAMMER * pgm, char * port) {
     if (usbpid) {
       pid = *(int *)(ldata(usbpid));
       if (lnext(usbpid))
-	fprintf(stderr,
-		"%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
+	avrdude_message("%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
 		progname, pid);
     } else {
       pid = USB_DEVICE_FT245;
@@ -575,7 +571,7 @@ static int ft245r_open(PROGRAMMER * pgm, char * port) {
                                   pgm->usbsn[0]?pgm->usbsn:NULL,
                                   devnum);
     if (rv) {
-        fprintf (stderr, "can't open ftdi device %d. (%s)\n", devnum, ftdi_get_error_string(handle));
+        avrdude_message("can't open ftdi device %d. (%s)\n", devnum, ftdi_get_error_string(handle));
         goto cleanup_no_usb;
     }
 
@@ -605,9 +601,8 @@ static int ft245r_open(PROGRAMMER * pgm, char * port) {
 
     rv = ftdi_set_bitmode(handle, ft245r_ddr, BITMODE_SYNCBB); // set Synchronous BitBang
     if (rv) {
-        fprintf(stderr,
-                "%s: Synchronous BitBangMode is not supported (%s)\n",
-                progname, ftdi_get_error_string(handle));
+        avrdude_message("%s: Synchronous BitBangMode is not supported (%s)\n",
+                        progname, ftdi_get_error_string(handle));
         goto cleanup;
     }
 
@@ -660,7 +655,7 @@ static void ft245r_close(PROGRAMMER * pgm) {
 }
 
 static void ft245r_display(PROGRAMMER * pgm, const char * p) {
-    fprintf(stderr, "%sPin assignment  : 0..7 = DBUS0..7\n",p);/* , 8..11 = GPIO0..3\n",p);*/
+    avrdude_message("%sPin assignment  : 0..7 = DBUS0..7\n",p);/* , 8..11 = GPIO0..3\n",p);*/
     pgm_display_generic_mask(pgm, p, SHOW_ALL_PINS);
 }
 
@@ -713,7 +708,7 @@ static void put_request(int addr, int bytes, int n) {
     } else {
         p = malloc(sizeof(struct ft245r_request));
         if (!p) {
-            fprintf(stderr, "can't alloc memory\n");
+            avrdude_message("can't alloc memory\n");
             exit(1);
         }
     }
@@ -807,7 +802,7 @@ static int ft245r_paged_write_flash(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
         put_request(addr_save, buf_pos, 0);
         //ft245r_sync(pgm);
 #if 0
-        fprintf(stderr, "send addr 0x%04x bufsize %d [%02x %02x] page_write %d\n",
+        avrdude_message("send addr 0x%04x bufsize %d [%02x %02x] page_write %d\n",
                 addr_save,buf_pos,
                 extract_data_out(pgm, buf , (0*4 + 3) ),
                 extract_data_out(pgm, buf , (1*4 + 3) ),
diff --git a/jtag3.c b/jtag3.c
index f388dfa9..552b94aa 100644
--- a/jtag3.c
+++ b/jtag3.c
@@ -110,9 +110,8 @@ static unsigned int jtag3_memaddr(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m, uns
 void jtag3_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: jtag3_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: jtag3_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -170,7 +169,7 @@ static void jtag3_print_data(unsigned char *b, size_t s)
     return;
 
   for (i = 0; i < s; i++) {
-    fprintf(stderr, "0x%02x", b[i]);
+    avrdude_message("0x%02x", b[i]);
     if (i % 16 == 15)
       putc('\n', stderr);
     else
@@ -185,10 +184,10 @@ static void jtag3_prmsg(PROGRAMMER * pgm, unsigned char * data, size_t len)
   int i;
 
   if (verbose >= 4) {
-    fprintf(stderr, "Raw message:\n");
+    avrdude_message("Raw message:\n");
 
     for (i = 0; i < len; i++) {
-      fprintf(stderr, "%02x ", data[i]);
+      avrdude_message("%02x ", data[i]);
       if (i % 16 == 15)
 	putc('\n', stderr);
       else
@@ -200,34 +199,34 @@ static void jtag3_prmsg(PROGRAMMER * pgm, unsigned char * data, size_t len)
 
   switch (data[0]) {
     case SCOPE_INFO:
-      fprintf(stderr, "[info] ");
+      avrdude_message("[info] ");
       break;
 
     case SCOPE_GENERAL:
-      fprintf(stderr, "[general] ");
+      avrdude_message("[general] ");
       break;
 
     case SCOPE_AVR_ISP:
-      fprintf(stderr, "[AVRISP] ");
+      avrdude_message("[AVRISP] ");
       jtag3_print_data(data + 1, len - 1);
       return;
 
     case SCOPE_AVR:
-      fprintf(stderr, "[AVR] ");
+      avrdude_message("[AVR] ");
       break;
 
     default:
-      fprintf(stderr, "[scope 0x%02x] ", data[0]);
+      avrdude_message("[scope 0x%02x] ", data[0]);
       break;
   }
 
   switch (data[1]) {
     case RSP3_OK:
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
       break;
 
     case RSP3_FAILED:
-      fprintf(stderr, "FAILED");
+      avrdude_message("FAILED");
       if (len > 3)
       {
 	char reason[50];
@@ -266,26 +265,26 @@ static void jtag3_prmsg(PROGRAMMER * pgm, unsigned char * data, size_t len)
 	    strcpy(reason, "debugWIRE communication failed");
 	    break;
 	}
-	fprintf(stderr, ", reason: %s\n", reason);
+	avrdude_message(", reason: %s\n", reason);
       }
       else
       {
-	fprintf(stderr, ", unspecified reason\n");
+	avrdude_message(", unspecified reason\n");
       }
       break;
 
     case RSP3_DATA:
-      fprintf(stderr, "Data returned:\n");
+      avrdude_message("Data returned:\n");
       jtag3_print_data(data + 2, len - 2);
       break;
 
     case RSP3_INFO:
-      fprintf(stderr, "Info returned:\n");
+      avrdude_message("Info returned:\n");
       for (i = 2; i < len; i++) {
 	if (isprint(data[i]))
 	  putc(data[i], stderr);
 	else
-	  fprintf(stderr, "\\%03o", data[i]);
+	  avrdude_message("\\%03o", data[i]);
       }
       putc('\n', stderr);
       break;
@@ -293,18 +292,18 @@ static void jtag3_prmsg(PROGRAMMER * pgm, unsigned char * data, size_t len)
     case RSP3_PC:
       if (len < 7)
       {
-	fprintf(stderr, "PC reply too short\n");
+	avrdude_message("PC reply too short\n");
       }
       else
       {
 	unsigned long pc = (data[6] << 24) | (data[5] << 16)
 	  | (data[4] << 8) | data[3];
-	fprintf(stderr, "PC 0x%0lx\n", pc);
+	avrdude_message("PC 0x%0lx\n", pc);
       }
       break;
 
   default:
-    fprintf(stderr, "unknown message 0x%02x\n", data[1]);
+    avrdude_message("unknown message 0x%02x\n", data[1]);
   }
 }
 
@@ -313,10 +312,10 @@ static void jtag3_prevent(PROGRAMMER * pgm, unsigned char * data, size_t len)
   int i;
 
   if (verbose >= 4) {
-    fprintf(stderr, "Raw event:\n");
+    avrdude_message("Raw event:\n");
 
     for (i = 0; i < len; i++) {
-      fprintf(stderr, "%02x ", data[i]);
+      avrdude_message("%02x ", data[i]);
       if (i % 16 == 15)
 	putc('\n', stderr);
       else
@@ -326,47 +325,47 @@ static void jtag3_prevent(PROGRAMMER * pgm, unsigned char * data, size_t len)
       putc('\n', stderr);
   }
 
-  fprintf(stderr, "Event serial 0x%04x, ",
+  avrdude_message("Event serial 0x%04x, ",
 	  (data[3] << 8) | data[2]);
 
   switch (data[4]) {
     case SCOPE_INFO:
-      fprintf(stderr, "[info] ");
+      avrdude_message("[info] ");
       break;
 
     case SCOPE_GENERAL:
-      fprintf(stderr, "[general] ");
+      avrdude_message("[general] ");
       break;
 
     case SCOPE_AVR:
-      fprintf(stderr, "[AVR] ");
+      avrdude_message("[AVR] ");
       break;
 
     default:
-      fprintf(stderr, "[scope 0x%02x] ", data[0]);
+      avrdude_message("[scope 0x%02x] ", data[0]);
       break;
   }
 
   switch (data[5]) {
   case EVT3_BREAK:
-    fprintf(stderr, "BREAK");
+    avrdude_message("BREAK");
     if (len >= 11) {
-      fprintf(stderr, ", PC = 0x%lx, reason ", b4_to_u32(data + 6));
+      avrdude_message(", PC = 0x%lx, reason ", b4_to_u32(data + 6));
       switch (data[10]) {
       case 0x00:
-	fprintf(stderr, "unspecified");
+	avrdude_message("unspecified");
 	break;
       case 0x01:
-	fprintf(stderr, "program break");
+	avrdude_message("program break");
 	break;
       case 0x02:
-	fprintf(stderr, "data break PDSB");
+	avrdude_message("data break PDSB");
 	break;
       case 0x03:
-	fprintf(stderr, "data break PDMSB");
+	avrdude_message("data break PDMSB");
 	break;
       default:
-	fprintf(stderr, "unknown: 0x%02x", data[10]);
+	avrdude_message("unknown: 0x%02x", data[10]);
       }
       /* There are two more bytes of data which always appear to be
        * 0x01, 0x00.  Purpose unknown. */
@@ -375,24 +374,24 @@ static void jtag3_prevent(PROGRAMMER * pgm, unsigned char * data, size_t len)
 
   case EVT3_SLEEP:
     if (len >= 8 && data[7] == 0)
-      fprintf(stderr, "sleeping");
+      avrdude_message("sleeping");
     else if (len >= 8 && data[7] == 1)
-      fprintf(stderr, "wakeup");
+      avrdude_message("wakeup");
     else
-      fprintf(stderr, "unknown SLEEP event");
+      avrdude_message("unknown SLEEP event");
     break;
 
   case EVT3_POWER:
     if (len >= 8 && data[7] == 0)
-      fprintf(stderr, "power-down");
+      avrdude_message("power-down");
     else if (len >= 8 && data[7] == 1)
-      fprintf(stderr, "power-up");
+      avrdude_message("power-up");
     else
-      fprintf(stderr, "unknown POWER event");
+      avrdude_message("unknown POWER event");
     break;
 
   default:
-    fprintf(stderr, "UNKNOWN 0x%02x", data[5]);
+    avrdude_message("UNKNOWN 0x%02x", data[5]);
     break;
   }
   putc('\n', stderr);
@@ -408,12 +407,12 @@ int jtag3_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
     return jtag3_edbg_send(pgm, data, len);
 
   if (verbose >= 3)
-    fprintf(stderr, "\n%s: jtag3_send(): sending %lu bytes\n",
+    avrdude_message("\n%s: jtag3_send(): sending %lu bytes\n",
 	    progname, (unsigned long)len);
 
   if ((buf = malloc(len + 4)) == NULL)
     {
-      fprintf(stderr, "%s: jtag3_send(): out of memory",
+      avrdude_message("%s: jtag3_send(): out of memory",
 	      progname);
       return -1;
     }
@@ -424,9 +423,8 @@ int jtag3_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   memcpy(buf + 4, data, len);
 
   if (serial_send(&pgm->fd, buf, len + 4) != 0) {
-    fprintf(stderr,
-	    "%s: jtag3_send(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("%s: jtag3_send(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
 
@@ -448,14 +446,13 @@ static int jtag3_edbg_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
     }
 
   if (verbose >= 3)
-    fprintf(stderr, "\n%s: jtag3_edbg_send(): sending %lu bytes\n",
+    avrdude_message("\n%s: jtag3_edbg_send(): sending %lu bytes\n",
 	    progname, (unsigned long)len);
 
   if (len + 8 > USBDEV_MAX_XFER_3)
     {
-      fprintf(stderr,
-	      "%s: jtag3_edbg_send(): Fragmentation not (yet) implemented!\n",
-	      progname);
+      avrdude_message("%s: jtag3_edbg_send(): Fragmentation not (yet) implemented!\n",
+                      progname);
       return -1;
     }
   buf[0] = EDBG_VENDOR_AVR_CMD;
@@ -468,9 +465,8 @@ static int jtag3_edbg_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   memcpy(buf + 8, data, len);
 
   if (serial_send(&pgm->fd, buf, USBDEV_MAX_XFER_3) != 0) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_send(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("%s: jtag3_edbg_send(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
   rv = serial_recv(&pgm->fd, status, USBDEV_MAX_XFER_3);
@@ -478,17 +474,15 @@ static int jtag3_edbg_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   if (rv < 0) {
     /* timeout in receive */
     if (verbose > 1)
-      fprintf(stderr,
-	      "%s: jtag3_edbg_send(): Timeout receiving packet\n",
-	      progname);
+      avrdude_message("%s: jtag3_edbg_send(): Timeout receiving packet\n",
+                      progname);
     return -1;
   }
   if (status[0] != EDBG_VENDOR_AVR_CMD || status[1] != 0x01)
     {
       /* what to do in this case? */
-      fprintf(stderr,
-	      "%s: jtag3_edbg_send(): Unexpected response 0x%02x, 0x%02x\n",
-	      progname, status[0], status[1]);
+      avrdude_message("%s: jtag3_edbg_send(): Unexpected response 0x%02x, 0x%02x\n",
+                      progname, status[0], status[1]);
     }
 
   return 0;
@@ -504,7 +498,7 @@ static int jtag3_edbg_prepare(PROGRAMMER * pgm)
   int rv;
 
   if (verbose >= 3)
-    fprintf(stderr, "\n%s: jtag3_edbg_prepare()\n",
+    avrdude_message("\n%s: jtag3_edbg_prepare()\n",
 	    progname);
 
   if (verbose >= 4)
@@ -513,49 +507,42 @@ static int jtag3_edbg_prepare(PROGRAMMER * pgm)
   buf[0] = CMSISDAP_CMD_CONNECT;
   buf[1] = CMSISDAP_CONN_SWD;
   if (serial_send(&pgm->fd, buf, USBDEV_MAX_XFER_3) != 0) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_prepare(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("%s: jtag3_edbg_prepare(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
   rv = serial_recv(&pgm->fd, status, USBDEV_MAX_XFER_3);
   if (rv != USBDEV_MAX_XFER_3) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_prepare(): failed to read from serial port (%d)\n",
-	    progname, rv);
+    avrdude_message("%s: jtag3_edbg_prepare(): failed to read from serial port (%d)\n",
+                    progname, rv);
     return -1;
   }
   if (status[0] != CMSISDAP_CMD_CONNECT ||
       status[1] == 0)
-    fprintf(stderr,
-	    "%s: jtag3_edbg_prepare(): unexpected response 0x%02x, 0x%02x\n",
-	    progname, status[0], status[1]);
+    avrdude_message("%s: jtag3_edbg_prepare(): unexpected response 0x%02x, 0x%02x\n",
+                    progname, status[0], status[1]);
   if (verbose >= 2)
-    fprintf(stderr,
-	    "%s: jtag3_edbg_prepare(): connection status 0x%02x\n",
-	    progname, status[1]);
+    avrdude_message("%s: jtag3_edbg_prepare(): connection status 0x%02x\n",
+                    progname, status[1]);
 
   buf[0] = CMSISDAP_CMD_LED;
   buf[1] = CMSISDAP_LED_CONNECT;
   buf[2] = 1;
   if (serial_send(&pgm->fd, buf, USBDEV_MAX_XFER_3) != 0) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_prepare(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("%s: jtag3_edbg_prepare(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
   rv = serial_recv(&pgm->fd, status, USBDEV_MAX_XFER_3);
   if (rv != USBDEV_MAX_XFER_3) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_prepare(): failed to read from serial port (%d)\n",
-	    progname, rv);
+    avrdude_message("%s: jtag3_edbg_prepare(): failed to read from serial port (%d)\n",
+                    progname, rv);
     return -1;
   }
   if (status[0] != CMSISDAP_CMD_LED ||
       status[1] != 0)
-    fprintf(stderr,
-	    "%s: jtag3_edbg_prepare(): unexpected response 0x%02x, 0x%02x\n",
-	    progname, status[0], status[1]);
+    avrdude_message("%s: jtag3_edbg_prepare(): unexpected response 0x%02x, 0x%02x\n",
+                    progname, status[0], status[1]);
 
   return 0;
 }
@@ -571,7 +558,7 @@ static int jtag3_edbg_signoff(PROGRAMMER * pgm)
   int rv;
 
   if (verbose >= 3)
-    fprintf(stderr, "\n%s: jtag3_edbg_signoff()\n",
+    avrdude_message("\n%s: jtag3_edbg_signoff()\n",
 	    progname);
 
   if (verbose >= 4)
@@ -581,43 +568,37 @@ static int jtag3_edbg_signoff(PROGRAMMER * pgm)
   buf[1] = CMSISDAP_LED_CONNECT;
   buf[2] = 0;
   if (serial_send(&pgm->fd, buf, USBDEV_MAX_XFER_3) != 0) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_signoff(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("%s: jtag3_edbg_signoff(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
   rv = serial_recv(&pgm->fd, status, USBDEV_MAX_XFER_3);
   if (rv != USBDEV_MAX_XFER_3) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_signoff(): failed to read from serial port (%d)\n",
-	    progname, rv);
+    avrdude_message("%s: jtag3_edbg_signoff(): failed to read from serial port (%d)\n",
+                    progname, rv);
     return -1;
   }
   if (status[0] != CMSISDAP_CMD_LED ||
       status[1] != 0)
-    fprintf(stderr,
-	    "%s: jtag3_edbg_signoff(): unexpected response 0x%02x, 0x%02x\n",
-	    progname, status[0], status[1]);
+    avrdude_message("%s: jtag3_edbg_signoff(): unexpected response 0x%02x, 0x%02x\n",
+                    progname, status[0], status[1]);
 
   buf[0] = CMSISDAP_CMD_DISCONNECT;
   if (serial_send(&pgm->fd, buf, USBDEV_MAX_XFER_3) != 0) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_signoff(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("%s: jtag3_edbg_signoff(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
   rv = serial_recv(&pgm->fd, status, USBDEV_MAX_XFER_3);
   if (rv != USBDEV_MAX_XFER_3) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_signoff(): failed to read from serial port (%d)\n",
-	    progname, rv);
+    avrdude_message("%s: jtag3_edbg_signoff(): failed to read from serial port (%d)\n",
+                    progname, rv);
     return -1;
   }
   if (status[0] != CMSISDAP_CMD_DISCONNECT ||
       status[1] != 0)
-    fprintf(stderr,
-	    "%s: jtag3_edbg_signoff(): unexpected response 0x%02x, 0x%02x\n",
-	    progname, status[0], status[1]);
+    avrdude_message("%s: jtag3_edbg_signoff(): unexpected response 0x%02x, 0x%02x\n",
+                    progname, status[0], status[1]);
 
   return 0;
 }
@@ -645,10 +626,10 @@ static int jtag3_recv_frame(PROGRAMMER * pgm, unsigned char **msg) {
     return jtag3_edbg_recv_frame(pgm, msg);
 
   if (verbose >= 4)
-    fprintf(stderr, "%s: jtag3_recv():\n", progname);
+    avrdude_message("%s: jtag3_recv():\n", progname);
 
   if ((buf = malloc(pgm->fd.usb.max_xfer)) == NULL) {
-    fprintf(stderr, "%s: jtag3_recv(): out of memory\n",
+    avrdude_message("%s: jtag3_recv(): out of memory\n",
 	    progname);
     return -1;
   }
@@ -660,9 +641,8 @@ static int jtag3_recv_frame(PROGRAMMER * pgm, unsigned char **msg) {
   if (rv < 0) {
     /* timeout in receive */
     if (verbose > 1)
-      fprintf(stderr,
-	      "%s: jtag3_recv(): Timeout receiving packet\n",
-	      progname);
+      avrdude_message("%s: jtag3_recv(): Timeout receiving packet\n",
+                      progname);
     free(buf);
     return -1;
   }
@@ -677,10 +657,10 @@ static int jtag3_edbg_recv_frame(PROGRAMMER * pgm, unsigned char **msg) {
   unsigned char *buf = NULL;
 
   if (verbose >= 4)
-    fprintf(stderr, "%s: jtag3_edbg_recv():\n", progname);
+    avrdude_message("%s: jtag3_edbg_recv():\n", progname);
 
   if ((buf = malloc(USBDEV_MAX_XFER_3)) == NULL) {
-    fprintf(stderr, "%s: jtag3_edbg_recv(): out of memory\n",
+    avrdude_message("%s: jtag3_edbg_recv(): out of memory\n",
 	    progname);
     return -1;
   }
@@ -688,9 +668,8 @@ static int jtag3_edbg_recv_frame(PROGRAMMER * pgm, unsigned char **msg) {
   buf[0] = EDBG_VENDOR_AVR_RSP;
 
   if (serial_send(&pgm->fd, buf, USBDEV_MAX_XFER_3) != 0) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_recv(): error sending CMSIS-DAP vendor command\n",
-	    progname);
+    avrdude_message("%s: jtag3_edbg_recv(): error sending CMSIS-DAP vendor command\n",
+                    progname);
     return -1;
   }
 
@@ -699,26 +678,23 @@ static int jtag3_edbg_recv_frame(PROGRAMMER * pgm, unsigned char **msg) {
   if (rv < 0) {
     /* timeout in receive */
     if (verbose > 1)
-      fprintf(stderr,
-	      "%s: jtag3_edbg_recv(): Timeout receiving packet\n",
-	      progname);
+      avrdude_message("%s: jtag3_edbg_recv(): Timeout receiving packet\n",
+                      progname);
     free(buf);
     return -1;
   }
 
   if (buf[0] != EDBG_VENDOR_AVR_RSP ||
       buf[1] != ((1 << 4) | 1)) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_recv(): Unexpected response 0x%02x, 0x%02x\n",
-	    progname, buf[0], buf[1]);
+    avrdude_message("%s: jtag3_edbg_recv(): Unexpected response 0x%02x, 0x%02x\n",
+                    progname, buf[0], buf[1]);
     return -1;
   }
   /* calculate length from response; CMSIS-DAP response might be larger */
   len = (buf[2] << 8) | buf[3];
   if (len > rv + 4) {
-    fprintf(stderr,
-	    "%s: jtag3_edbg_recv(): Unexpected length value (%d > %d)\n",
-	    progname, len, rv + 4);
+    avrdude_message("%s: jtag3_edbg_recv(): Unexpected length value (%d > %d)\n",
+                    progname, len, rv + 4);
     len = rv + 4;
   }
   memmove(buf, buf + 4, len);
@@ -747,7 +723,7 @@ int jtag3_recv(PROGRAMMER * pgm, unsigned char **msg) {
     rv &= USB_RECV_LENGTH_MASK;
     r_seqno = ((*msg)[2] << 8) | (*msg)[1];
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtag3_recv(): "
+      avrdude_message("%s: jtag3_recv(): "
 	      "Got message seqno %d (command_sequence == %d)\n",
 	      progname, r_seqno, PDATA(pgm)->command_sequence);
     if (r_seqno == PDATA(pgm)->command_sequence) {
@@ -764,7 +740,7 @@ int jtag3_recv(PROGRAMMER * pgm, unsigned char **msg) {
       return rv;
     }
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtag3_recv(): "
+      avrdude_message("%s: jtag3_recv(): "
 	      "got wrong sequence number, %u != %u\n",
 	      progname, r_seqno, PDATA(pgm)->command_sequence);
 
@@ -779,7 +755,7 @@ int jtag3_recv(PROGRAMMER * pgm, unsigned char **msg) {
   unsigned char c;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: Sending %s command: ",
+    avrdude_message("%s: Sending %s command: ",
 	    progname, descr);
   jtag3_send(pgm, cmd, cmdlen);
 
@@ -787,21 +763,19 @@ int jtag3_recv(PROGRAMMER * pgm, unsigned char **msg) {
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: %s command: timeout/error communicating with programmer (status %d)\n",
-	    progname, descr, status);
+    avrdude_message("%s: %s command: timeout/error communicating with programmer (status %d)\n",
+                    progname, descr, status);
     return -1;
   } else if (verbose >= 3) {
     putc('\n', stderr);
     jtag3_prmsg(pgm, *resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", (*resp)[1], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", (*resp)[1], status);
 
   c = (*resp)[1];
   if ((c & RSP3_STATUS_MASK) != RSP3_OK) {
-    fprintf(stderr,
-	    "%s: bad response to %s command: 0x%02x\n",
-	    progname, descr, c);
+    avrdude_message("%s: bad response to %s command: 0x%02x\n",
+                    progname, descr, c);
     free(*resp);
     resp = 0;
     return -1;
@@ -816,7 +790,7 @@ int jtag3_getsync(PROGRAMMER * pgm, int mode) {
   unsigned char buf[3], *resp;
 
   if (verbose >= 3)
-    fprintf(stderr, "%s: jtag3_getsync()\n", progname);
+    avrdude_message("%s: jtag3_getsync()\n", progname);
 
   if (pgm->flag & PGM_FL_IS_EDBG) {
     if (jtag3_edbg_prepare(pgm) < 0)
@@ -862,7 +836,7 @@ static int jtag3_chip_erase(PROGRAMMER * pgm, AVRPART * p)
 static int jtag3_chip_erase_dw(PROGRAMMER * pgm, AVRPART * p)
 {
 
-  fprintf(stderr, "%s: Chip erase not supported in debugWire mode\n",
+  avrdude_message("%s: Chip erase not supported in debugWire mode\n",
 	  progname);
 
   return 0;
@@ -893,9 +867,8 @@ static int jtag3_program_enable(PROGRAMMER * pgm)
 
     /* XXX activate external reset here */
     if (verbose > 0)
-      fprintf(stderr,
-	      "%s: retrying with external reset applied\n",
-	      progname);
+      avrdude_message("%s: retrying with external reset applied\n",
+                      progname);
   }
 
   PDATA(pgm)->prog_enabled = 1;
@@ -967,13 +940,11 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
   if (jtag3_getparm(pgm, SCOPE_GENERAL, 0, PARM3_FW_MAJOR, parm, 2) < 0)
     return -1;
   if (pgm->fd.usb.max_xfer < USBDEV_MAX_XFER_3 && (pgm->flag & PGM_FL_IS_EDBG) == 0) {
-    fprintf(stderr,
-	    "%s: the JTAGICE3's firmware %d.%d is broken on USB 1.1 connections, sorry\n",
-	    progname, parm[0], parm[1]);
+    avrdude_message("%s: the JTAGICE3's firmware %d.%d is broken on USB 1.1 connections, sorry\n",
+                    progname, parm[0], parm[1]);
     if (ovsigck) {
-      fprintf(stderr,
-	      "%s: forced to continue by option -F; THIS PUTS THE DEVICE'S DATA INTEGRITY AT RISK!\n",
-	      progname);
+      avrdude_message("%s: forced to continue by option -F; THIS PUTS THE DEVICE'S DATA INTEGRITY AT RISK!\n",
+                      progname);
     } else {
       return -1;
     }
@@ -994,7 +965,7 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
   }
 
   if (conn == 0) {
-    fprintf(stderr, "%s: jtag3_initialize(): part %s has no %s interface\n",
+    avrdude_message("%s: jtag3_initialize(): part %s has no %s interface\n",
 	    progname, p->desc, ifname);
     return -1;
   }
@@ -1028,7 +999,7 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
   {
     unsigned int clock = 1E-3 / pgm->bitclock; /* kHz */
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtag3_initialize(): "
+      avrdude_message("%s: jtag3_initialize(): "
 	      "trying to set JTAG clock to %u kHz\n",
 	      progname, clock);
     parm[0] = clock & 0xff;
@@ -1040,7 +1011,7 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
   if (conn == PARM3_CONN_JTAG)
   {
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtag3_initialize(): "
+      avrdude_message("%s: jtag3_initialize(): "
 	      "trying to set JTAG daisy-chain info to %d,%d,%d,%d\n",
 	      progname,
 	      PDATA(pgm)->jtagchain[0], PDATA(pgm)->jtagchain[1],
@@ -1132,9 +1103,8 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
 	ocdrev = 4;
       else
 	ocdrev = 3;		/* many exceptions from that, actually */
-      fprintf(stderr,
-	      "%s: part definition for %s lacks \"ocdrev\"; guessing %d\n",
-	      progname, p->desc, ocdrev);
+      avrdude_message("%s: part definition for %s lacks \"ocdrev\"; guessing %d\n",
+                      progname, p->desc, ocdrev);
       md.ocd_revision = ocdrev;
     } else {
       md.ocd_revision = p->ocdrev;
@@ -1174,7 +1144,7 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
    */
   if (resp[1] == RSP3_DATA && status >= 7 && verbose >= 1)
     /* JTAG ID has been returned */
-    fprintf(stderr, "%s: JTAG ID returned: 0x%02x 0x%02x 0x%02x 0x%02x\n",
+    avrdude_message("%s: JTAG ID returned: 0x%02x 0x%02x 0x%02x 0x%02x\n",
 	    progname, resp[3], resp[4], resp[5], resp[6]);
 
   free(resp);
@@ -1188,9 +1158,8 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
     AVRMEM *bootmem = avr_locate_mem(p, "boot");
     AVRMEM *flashmem = avr_locate_mem(p, "flash");
     if (bootmem == NULL || flashmem == NULL) {
-      fprintf(stderr,
-	      "%s: jtagmk3_initialize(): Cannot locate \"flash\" and \"boot\" memories in description\n",
-	      progname);
+      avrdude_message("%s: jtagmk3_initialize(): Cannot locate \"flash\" and \"boot\" memories in description\n",
+                      progname);
     } else {
       PDATA(pgm)->boot_start = bootmem->offset - flashmem->offset;
     }
@@ -1199,12 +1168,12 @@ static int jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
   free(PDATA(pgm)->flash_pagecache);
   free(PDATA(pgm)->eeprom_pagecache);
   if ((PDATA(pgm)->flash_pagecache = malloc(PDATA(pgm)->flash_pagesize)) == NULL) {
-    fprintf(stderr, "%s: jtag3_initialize(): Out of memory\n",
+    avrdude_message("%s: jtag3_initialize(): Out of memory\n",
 	    progname);
     return -1;
   }
   if ((PDATA(pgm)->eeprom_pagecache = malloc(PDATA(pgm)->eeprom_pagesize)) == NULL) {
-    fprintf(stderr, "%s: jtag3_initialize(): Out of memory\n",
+    avrdude_message("%s: jtag3_initialize(): Out of memory\n",
 	    progname);
     free(PDATA(pgm)->flash_pagecache);
     return -1;
@@ -1248,18 +1217,16 @@ static int jtag3_parseextparms(PROGRAMMER * pgm, LISTID extparms)
       unsigned int ub, ua, bb, ba;
       if (sscanf(extended_param, "jtagchain=%u,%u,%u,%u", &ub, &ua, &bb, &ba)
           != 4) {
-        fprintf(stderr,
-                "%s: jtag3_parseextparms(): invalid JTAG chain '%s'\n",
-                progname, extended_param);
+        avrdude_message("%s: jtag3_parseextparms(): invalid JTAG chain '%s'\n",
+                        progname, extended_param);
         rv = -1;
         continue;
       }
       if (verbose >= 2) {
-        fprintf(stderr,
-                "%s: jtag3_parseextparms(): JTAG chain parsed as:\n"
-                "%s %u units before, %u units after, %u bits before, %u bits after\n",
-                progname,
-                progbuf, ub, ua, bb, ba);
+        avrdude_message("%s: jtag3_parseextparms(): JTAG chain parsed as:\n"
+                        "%s %u units before, %u units after, %u bits before, %u bits after\n",
+                        progname,
+                        progbuf, ub, ua, bb, ba);
       }
       PDATA(pgm)->jtagchain[0] = ub;
       PDATA(pgm)->jtagchain[1] = ua;
@@ -1269,9 +1236,8 @@ static int jtag3_parseextparms(PROGRAMMER * pgm, LISTID extparms)
       continue;
     }
 
-    fprintf(stderr,
-            "%s: jtag3_parseextparms(): invalid extended parameter '%s'\n",
-            progname, extended_param);
+    avrdude_message("%s: jtag3_parseextparms(): invalid extended parameter '%s'\n",
+                    progname, extended_param);
     rv = -1;
   }
 
@@ -1285,14 +1251,13 @@ int jtag3_open_common(PROGRAMMER * pgm, char * port)
   int rv = -1;
 
 #if !defined(HAVE_LIBUSB)
-  fprintf(stderr, "avrdude was compiled without usb support.\n");
+  avrdude_message("avrdude was compiled without usb support.\n");
   return -1;
 #endif
 
   if (strncmp(port, "usb", 3) != 0) {
-    fprintf(stderr,
-            "%s: jtag3_open_common(): JTAGICE3/EDBG port names must start with \"usb\"\n",
-            progname);
+    avrdude_message("%s: jtag3_open_common(): JTAGICE3/EDBG port names must start with \"usb\"\n",
+                    progname);
     return -1;
   }
 
@@ -1318,14 +1283,13 @@ int jtag3_open_common(PROGRAMMER * pgm, char * port)
     rv = serial_open(port, pinfo, &pgm->fd);
   }
   if (rv < 0) {
-    fprintf(stderr,
-            "%s: jtag3_open_common(): Did not find any device matching VID 0x%04x and PID list: ",
-            progname, (unsigned)pinfo.usbinfo.vid);
+    avrdude_message("%s: jtag3_open_common(): Did not find any device matching VID 0x%04x and PID list: ",
+                    progname, (unsigned)pinfo.usbinfo.vid);
     int notfirst = 0;
     for (usbpid = lfirst(pgm->usbpid); usbpid != NULL; usbpid = lnext(usbpid)) {
       if (notfirst)
-        fprintf(stderr, ", ");
-      fprintf(stderr, "0x%04x", (unsigned int)(*(int *)(ldata(usbpid))));
+        avrdude_message(", ");
+      avrdude_message("0x%04x", (unsigned int)(*(int *)(ldata(usbpid))));
       notfirst = 1;
     }
     fputc('\n', stderr);
@@ -1339,9 +1303,8 @@ int jtag3_open_common(PROGRAMMER * pgm, char * port)
        running on a CMSIS-DAP device, using EDBG protocol */
     pgm->flag |= PGM_FL_IS_EDBG;
     if (verbose)
-      fprintf(stderr,
-              "%s: Found CMSIS-DAP compliant device, using EDBG protocol\n",
-              progname);
+      avrdude_message("%s: Found CMSIS-DAP compliant device, using EDBG protocol\n",
+                      progname);
   }
 
   /*
@@ -1357,7 +1320,7 @@ int jtag3_open_common(PROGRAMMER * pgm, char * port)
 static int jtag3_open(PROGRAMMER * pgm, char * port)
 {
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_open()\n", progname);
+    avrdude_message("%s: jtag3_open()\n", progname);
 
   if (jtag3_open_common(pgm, port) < 0)
     return -1;
@@ -1371,7 +1334,7 @@ static int jtag3_open(PROGRAMMER * pgm, char * port)
 static int jtag3_open_dw(PROGRAMMER * pgm, char * port)
 {
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_open_dw()\n", progname);
+    avrdude_message("%s: jtag3_open_dw()\n", progname);
 
   if (jtag3_open_common(pgm, port) < 0)
     return -1;
@@ -1385,7 +1348,7 @@ static int jtag3_open_dw(PROGRAMMER * pgm, char * port)
 static int jtag3_open_pdi(PROGRAMMER * pgm, char * port)
 {
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_open_pdi()\n", progname);
+    avrdude_message("%s: jtag3_open_pdi()\n", progname);
 
   if (jtag3_open_common(pgm, port) < 0)
     return -1;
@@ -1402,7 +1365,7 @@ void jtag3_close(PROGRAMMER * pgm)
   unsigned char buf[4], *resp;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_close()\n", progname);
+    avrdude_message("%s: jtag3_close()\n", progname);
 
   buf[0] = SCOPE_AVR;
   buf[1] = CMD3_SIGN_OFF;
@@ -1430,11 +1393,11 @@ static int jtag3_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   unsigned char cmd[8], *resp;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_page_erase(.., %s, 0x%x)\n",
+    avrdude_message("%s: jtag3_page_erase(.., %s, 0x%x)\n",
 	    progname, m->desc, addr);
 
   if (!(p->flags & AVRPART_HAS_PDI)) {
-    fprintf(stderr, "%s: jtag3_page_erase: not an Xmega device\n",
+    avrdude_message("%s: jtag3_page_erase: not an Xmega device\n",
 	    progname);
     return -1;
   }
@@ -1482,7 +1445,7 @@ static int jtag3_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   long otimeout = serial_recv_timeout;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_paged_write(.., %s, %d, %d)\n",
+    avrdude_message("%s: jtag3_paged_write(.., %s, %d, %d)\n",
 	    progname, m->desc, page_size, n_bytes);
 
   if (!(pgm->flag & PGM_FL_IS_DW) && jtag3_program_enable(pgm) < 0)
@@ -1491,7 +1454,7 @@ static int jtag3_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   if (page_size == 0) page_size = 256;
 
   if ((cmd = malloc(page_size + 13)) == NULL) {
-    fprintf(stderr, "%s: jtag3_paged_write(): Out of memory\n",
+    avrdude_message("%s: jtag3_paged_write(): Out of memory\n",
 	    progname);
     return -1;
   }
@@ -1539,7 +1502,7 @@ static int jtag3_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     else
       block_size = page_size;
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtag3_paged_write(): "
+      avrdude_message("%s: jtag3_paged_write(): "
 	      "block_size at addr %d is %d\n",
 	      progname, addr, block_size);
 
@@ -1588,7 +1551,7 @@ static int jtag3_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   long otimeout = serial_recv_timeout;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_paged_load(.., %s, %d, %d)\n",
+    avrdude_message("%s: jtag3_paged_load(.., %s, %d, %d)\n",
 	    progname, m->desc, page_size, n_bytes);
 
   if (!(pgm->flag & PGM_FL_IS_DW) && jtag3_program_enable(pgm) < 0)
@@ -1627,7 +1590,7 @@ static int jtag3_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     else
       block_size = page_size;
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtag3_paged_load(): "
+      avrdude_message("%s: jtag3_paged_load(): "
 	      "block_size at addr %d is %d\n",
 	      progname, addr, block_size);
 
@@ -1642,7 +1605,7 @@ static int jtag3_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
     if (resp[1] != RSP3_DATA ||
 	status < block_size + 4) {
-      fprintf(stderr, "%s: wrong/short reply to read memory command\n",
+      avrdude_message("%s: wrong/short reply to read memory command\n",
 	      progname);
       serial_recv_timeout = otimeout;
       free(resp);
@@ -1666,7 +1629,7 @@ static int jtag3_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   unsigned int pagesize = 0;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_read_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: jtag3_read_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   if (!(pgm->flag & PGM_FL_IS_DW) && jtag3_program_enable(pgm) < 0)
@@ -1754,7 +1717,7 @@ static int jtag3_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
       return 0;
     } else {
       /* should not happen */
-      fprintf(stderr, "address out of range for signature memory: %lu\n", addr);
+      avrdude_message("address out of range for signature memory: %lu\n", addr);
       return -1;
     }
   }
@@ -1795,7 +1758,7 @@ static int jtag3_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 
   if (resp[1] != RSP3_DATA ||
       status < (pagesize? pagesize: 1) + 4) {
-    fprintf(stderr, "%s: wrong/short reply to read memory command\n",
+    avrdude_message("%s: wrong/short reply to read memory command\n",
 	    progname);
     free(resp);
     return -1;
@@ -1822,7 +1785,7 @@ static int jtag3_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   unsigned int pagesize = 0;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_write_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: jtag3_write_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   cmd[0] = SCOPE_AVR;
@@ -1939,7 +1902,7 @@ static int jtag3_set_sck_period(PROGRAMMER * pgm, double v)
   parm[1] = (clock >> 8) & 0xff;
 
   if (PDATA(pgm)->set_sck == NULL) {
-    fprintf(stderr, "%s: No backend to set the SCK period for\n",
+    avrdude_message("%s: No backend to set the SCK period for\n",
 	    progname);
     return -1;
   }
@@ -1960,7 +1923,7 @@ int jtag3_getparm(PROGRAMMER * pgm, unsigned char scope,
   char descr[60];
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_getparm()\n", progname);
+    avrdude_message("%s: jtag3_getparm()\n", progname);
 
   buf[0] = scope;
   buf[1] = CMD3_GET_PARAMETER;
@@ -1977,10 +1940,9 @@ int jtag3_getparm(PROGRAMMER * pgm, unsigned char scope,
 
   c = resp[1];
   if (c != RSP3_DATA || status < 3) {
-    fprintf(stderr,
-	    "%s: jtag3_getparm(): "
-	    "bad response to %s\n",
-	    progname, descr);
+    avrdude_message("%s: jtag3_getparm(): "
+                    "bad response to %s\n",
+                    progname, descr);
     free(resp);
     return -1;
   }
@@ -2004,14 +1966,14 @@ int jtag3_setparm(PROGRAMMER * pgm, unsigned char scope,
   char descr[60];
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtag3_setparm()\n", progname);
+    avrdude_message("%s: jtag3_setparm()\n", progname);
 
   sprintf(descr, "set parameter (scope 0x%02x, section %d, parm %d)",
 	  scope, section, parm);
 
   if ((buf = malloc(6 + length)) == NULL)
   {
-    fprintf(stderr, "%s: jtag3_setparm(): Out of memory\n",
+    avrdude_message("%s: jtag3_setparm(): Out of memory\n",
 	    progname);
     return -1;
   }
@@ -2060,20 +2022,19 @@ static void jtag3_display(PROGRAMMER * pgm, const char * p)
 
   c = resp[1];
   if (c != RSP3_INFO) {
-    fprintf(stderr,
-	    "%s: jtag3_display(): response is not RSP3_INFO\n",
-	    progname);
+    avrdude_message("%s: jtag3_display(): response is not RSP3_INFO\n",
+                    progname);
     free(resp);
     return;
   }
   memmove(resp, resp + 3, status - 3);
   resp[status - 3] = 0;
 
-  fprintf(stderr, "%sICE hardware version: %d\n", p, parms[0]);
-  fprintf(stderr, "%sICE firmware version: %d.%02d (rel. %d)\n", p,
+  avrdude_message("%sICE hardware version: %d\n", p, parms[0]);
+  avrdude_message("%sICE firmware version: %d.%02d (rel. %d)\n", p,
 	  parms[1], parms[2],
 	  (parms[3] | (parms[4] << 8)));
-  fprintf(stderr, "%sSerial number   : %s\n", p, resp);
+  avrdude_message("%sSerial number   : %s\n", p, resp);
   free(resp);
 
   jtag3_print_parms1(pgm, p);
@@ -2087,27 +2048,27 @@ static void jtag3_print_parms1(PROGRAMMER * pgm, const char * p)
   if (jtag3_getparm(pgm, SCOPE_GENERAL, 1, PARM3_VTARGET, buf, 2) < 0)
     return;
 
-  fprintf(stderr, "%sVtarget         : %.2f V\n", p,
+  avrdude_message("%sVtarget         : %.2f V\n", p,
 	  b2_to_u16(buf) / 1000.0);
 
   if (jtag3_getparm(pgm, SCOPE_AVR, 1, PARM3_CLK_MEGA_PROG, buf, 2) < 0)
     return;
-  fprintf(stderr, "%sJTAG clock megaAVR/program: %u kHz\n", p,
+  avrdude_message("%sJTAG clock megaAVR/program: %u kHz\n", p,
 	  b2_to_u16(buf));
 
   if (jtag3_getparm(pgm, SCOPE_AVR, 1, PARM3_CLK_MEGA_DEBUG, buf, 2) < 0)
     return;
-  fprintf(stderr, "%sJTAG clock megaAVR/debug:   %u kHz\n", p,
+  avrdude_message("%sJTAG clock megaAVR/debug:   %u kHz\n", p,
 	  b2_to_u16(buf));
 
   if (jtag3_getparm(pgm, SCOPE_AVR, 1, PARM3_CLK_XMEGA_JTAG, buf, 2) < 0)
     return;
-  fprintf(stderr, "%sJTAG clock Xmega: %u kHz\n", p,
+  avrdude_message("%sJTAG clock Xmega: %u kHz\n", p,
 	  b2_to_u16(buf));
 
   if (jtag3_getparm(pgm, SCOPE_AVR, 1, PARM3_CLK_XMEGA_PDI, buf, 2) < 0)
     return;
-  fprintf(stderr, "%sPDI clock Xmega : %u kHz\n", p,
+  avrdude_message("%sPDI clock Xmega : %u kHz\n", p,
 	  b2_to_u16(buf));
 }
 
diff --git a/jtagmkI.c b/jtagmkI.c
index 2ff423bc..b1f19046 100644
--- a/jtagmkI.c
+++ b/jtagmkI.c
@@ -112,9 +112,8 @@ static int jtagmkI_resync(PROGRAMMER *pgm, int maxtries, int signon);
 static void jtagmkI_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: jtagmkI_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: jtagmkI_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -146,10 +145,10 @@ static void jtagmkI_prmsg(PROGRAMMER * pgm, unsigned char * data, size_t len)
   int i;
 
   if (verbose >= 4) {
-    fprintf(stderr, "Raw message:\n");
+    avrdude_message("Raw message:\n");
 
     for (i = 0; i < len; i++) {
-      fprintf(stderr, "0x%02x ", data[i]);
+      avrdude_message("0x%02x ", data[i]);
       if (i % 16 == 15)
 	putc('\n', stderr);
       else
@@ -161,34 +160,34 @@ static void jtagmkI_prmsg(PROGRAMMER * pgm, unsigned char * data, size_t len)
 
   switch (data[0]) {
   case RESP_OK:
-    fprintf(stderr, "OK\n");
+    avrdude_message("OK\n");
     break;
 
   case RESP_FAILED:
-    fprintf(stderr, "FAILED\n");
+    avrdude_message("FAILED\n");
     break;
 
   case RESP_BREAK:
-    fprintf(stderr, "breakpoint hit\n");
+    avrdude_message("breakpoint hit\n");
     break;
 
   case RESP_INFO:
-    fprintf(stderr, "IDR dirty\n");
+    avrdude_message("IDR dirty\n");
     break;
 
   case RESP_SYNC_ERROR:
-    fprintf(stderr, "Synchronization lost\n");
+    avrdude_message("Synchronization lost\n");
     break;
 
   case RESP_SLEEP:
-    fprintf(stderr, "sleep instruction hit\n");
+    avrdude_message("sleep instruction hit\n");
     break;
 
   case RESP_POWER:
-    fprintf(stderr, "target power lost\n");
+    avrdude_message("target power lost\n");
 
   default:
-    fprintf(stderr, "unknown message 0x%02x\n", data[0]);
+    avrdude_message("unknown message 0x%02x\n", data[0]);
   }
 
   putc('\n', stderr);
@@ -200,12 +199,12 @@ static int jtagmkI_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   unsigned char *buf;
 
   if (verbose >= 3)
-    fprintf(stderr, "\n%s: jtagmkI_send(): sending %u bytes\n",
+    avrdude_message("\n%s: jtagmkI_send(): sending %u bytes\n",
 	    progname, (unsigned int)len);
 
   if ((buf = malloc(len + 2)) == NULL)
     {
-      fprintf(stderr, "%s: jtagmkI_send(): out of memory",
+      avrdude_message("%s: jtagmkI_send(): out of memory",
 	      progname);
       exit(1);
     }
@@ -215,9 +214,8 @@ static int jtagmkI_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   buf[len + 1] = ' ';		/* EOP */
 
   if (serial_send(&pgm->fd, buf, len + 2) != 0) {
-    fprintf(stderr,
-	    "%s: jtagmkI_send(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("%s: jtagmkI_send(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
 
@@ -229,9 +227,8 @@ static int jtagmkI_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
 static int jtagmkI_recv(PROGRAMMER * pgm, unsigned char * buf, size_t len)
 {
   if (serial_recv(&pgm->fd, buf, len) != 0) {
-    fprintf(stderr,
-	    "\n%s: jtagmkI_recv(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("\n%s: jtagmkI_recv(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
   if (verbose >= 3) {
@@ -257,7 +254,7 @@ static int jtagmkI_resync(PROGRAMMER * pgm, int maxtries, int signon)
   serial_recv_timeout = 200;
 
   if (verbose >= 3)
-    fprintf(stderr, "%s: jtagmkI_resync()\n", progname);
+    avrdude_message("%s: jtagmkI_resync()\n", progname);
 
   jtagmkI_drain(pgm, 0);
 
@@ -266,19 +263,18 @@ static int jtagmkI_resync(PROGRAMMER * pgm, int maxtries, int signon)
     /* Get the sign-on information. */
     buf[0] = CMD_GET_SYNC;
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkI_resync(): Sending sync command: ",
+      avrdude_message("%s: jtagmkI_resync(): Sending sync command: ",
 	      progname);
 
     if (serial_send(&pgm->fd, buf, 1) != 0) {
-      fprintf(stderr,
-	      "\n%s: jtagmkI_resync(): failed to send command to serial port\n",
-	      progname);
+      avrdude_message("\n%s: jtagmkI_resync(): failed to send command to serial port\n",
+                      progname);
       serial_recv_timeout = otimeout;
       return -1;
     }
     if (serial_recv(&pgm->fd, resp, 1) == 0 && resp[0] == RESP_OK) {
       if (verbose >= 2)
-	fprintf(stderr, "got RESP_OK\n");
+	avrdude_message("got RESP_OK\n");
       break;
     }
 
@@ -298,29 +294,27 @@ static int jtagmkI_resync(PROGRAMMER * pgm, int maxtries, int signon)
       buf[2] = ' ';
       buf[3] = ' ';
       if (verbose >= 2)
-	fprintf(stderr, "%s: jtagmkI_resync(): Sending sign-on command: ",
+	avrdude_message("%s: jtagmkI_resync(): Sending sign-on command: ",
 		progname);
 
       if (serial_send(&pgm->fd, buf, 4) != 0) {
-	fprintf(stderr,
-		"\n%s: jtagmkI_resync(): failed to send command to serial port\n",
-		progname);
+	avrdude_message("\n%s: jtagmkI_resync(): failed to send command to serial port\n",
+                        progname);
 	serial_recv_timeout = otimeout;
 	return -1;
       }
       if (serial_recv(&pgm->fd, resp, 9) == 0 && resp[0] == RESP_OK) {
 	if (verbose >= 2)
-	  fprintf(stderr, "got RESP_OK\n");
+	  avrdude_message("got RESP_OK\n");
 	break;
       }
     }
   }
   if (tries >= maxtries) {
     if (verbose >= 2)
-      fprintf(stderr,
-	      "%s: jtagmkI_resync(): "
-	      "timeout/error communicating with programmer\n",
-	      progname);
+      avrdude_message("%s: jtagmkI_resync(): "
+                      "timeout/error communicating with programmer\n",
+                      progname);
     serial_recv_timeout = otimeout;
     return -1;
   }
@@ -341,7 +335,7 @@ static int jtagmkI_getsync(PROGRAMMER * pgm)
   jtagmkI_drain(pgm, 0);
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_getsync(): Sending sign-on command: ",
+    avrdude_message("%s: jtagmkI_getsync(): Sending sign-on command: ",
 	    progname);
 
   buf[0] = CMD_GET_SIGNON;
@@ -350,7 +344,7 @@ static int jtagmkI_getsync(PROGRAMMER * pgm)
     return -1;
   if (verbose >= 2) {
     resp[8] = '\0';
-    fprintf(stderr, "got %s\n", resp + 1);
+    avrdude_message("got %s\n", resp + 1);
   }
 
   return 0;
@@ -365,7 +359,7 @@ static int jtagmkI_chip_erase(PROGRAMMER * pgm, AVRPART * p)
 
   buf[0] = CMD_CHIP_ERASE;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_chip_erase(): Sending chip erase command: ",
+    avrdude_message("%s: jtagmkI_chip_erase(): Sending chip erase command: ",
 	    progname);
   jtagmkI_send(pgm, buf, 1);
   if (jtagmkI_recv(pgm, resp, 2) < 0)
@@ -373,14 +367,13 @@ static int jtagmkI_chip_erase(PROGRAMMER * pgm, AVRPART * p)
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_chip_erase(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_chip_erase(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
     return -1;
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 
   pgm->initialize(pgm, p);
@@ -414,7 +407,7 @@ static void jtagmkI_set_devdescr(PROGRAMMER * pgm, AVRPART * p)
   }
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_set_devdescr(): "
+    avrdude_message("%s: jtagmkI_set_devdescr(): "
 	    "Sending set device descriptor command: ",
 	    progname);
   jtagmkI_send(pgm, (unsigned char *)&sendbuf, sizeof(sendbuf));
@@ -424,13 +417,12 @@ static void jtagmkI_set_devdescr(PROGRAMMER * pgm, AVRPART * p)
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_set_devdescr(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_set_devdescr(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 }
 
@@ -443,7 +435,7 @@ static int jtagmkI_reset(PROGRAMMER * pgm)
 
   buf[0] = CMD_RESET;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_reset(): Sending reset command: ",
+    avrdude_message("%s: jtagmkI_reset(): Sending reset command: ",
 	    progname);
   jtagmkI_send(pgm, buf, 1);
 
@@ -452,14 +444,13 @@ static int jtagmkI_reset(PROGRAMMER * pgm)
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_reset(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_reset(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
     return -1;
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 
   return 0;
@@ -480,7 +471,7 @@ static int jtagmkI_program_enable(PROGRAMMER * pgm)
 
   buf[0] = CMD_ENTER_PROGMODE;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_program_enable(): "
+    avrdude_message("%s: jtagmkI_program_enable(): "
 	    "Sending enter progmode command: ",
 	    progname);
   jtagmkI_send(pgm, buf, 1);
@@ -490,14 +481,13 @@ static int jtagmkI_program_enable(PROGRAMMER * pgm)
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_program_enable(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_program_enable(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
     return -1;
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 
   PDATA(pgm)->prog_enabled = 1;
@@ -515,7 +505,7 @@ static int jtagmkI_program_disable(PROGRAMMER * pgm)
   if (pgm->fd.ifd != -1) {
     buf[0] = CMD_LEAVE_PROGMODE;
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkI_program_disable(): "
+      avrdude_message("%s: jtagmkI_program_disable(): "
               "Sending leave progmode command: ",
               progname);
     jtagmkI_send(pgm, buf, 1);
@@ -525,14 +515,13 @@ static int jtagmkI_program_disable(PROGRAMMER * pgm)
     if (resp[0] != RESP_OK) {
       if (verbose >= 2)
         putc('\n', stderr);
-      fprintf(stderr,
-              "%s: jtagmkI_program_disable(): "
-              "timeout/error communicating with programmer (resp %c)\n",
-              progname, resp[0]);
+      avrdude_message("%s: jtagmkI_program_disable(): "
+                      "timeout/error communicating with programmer (resp %c)\n",
+                      progname, resp[0]);
       return -1;
     } else {
       if (verbose == 2)
-        fprintf(stderr, "OK\n");
+        avrdude_message("OK\n");
     }
   }
   PDATA(pgm)->prog_enabled = 0;
@@ -561,7 +550,7 @@ static int jtagmkI_initialize(PROGRAMMER * pgm, AVRPART * p)
   unsigned char b;
 
   if (!(p->flags & AVRPART_HAS_JTAG)) {
-    fprintf(stderr, "%s: jtagmkI_initialize(): part %s has no JTAG interface\n",
+    avrdude_message("%s: jtagmkI_initialize(): part %s has no JTAG interface\n",
 	    progname, p->desc);
     return -1;
   }
@@ -570,11 +559,11 @@ static int jtagmkI_initialize(PROGRAMMER * pgm, AVRPART * p)
 
   if ((serdev->flags & SERDEV_FL_CANSETSPEED) && PDATA(pgm)->initial_baudrate != pgm->baudrate) {
     if ((b = jtagmkI_get_baud(pgm->baudrate)) == 0) {
-      fprintf(stderr, "%s: jtagmkI_initialize(): unsupported baudrate %d\n",
+      avrdude_message("%s: jtagmkI_initialize(): unsupported baudrate %d\n",
               progname, pgm->baudrate);
     } else {
       if (verbose >= 2)
-        fprintf(stderr, "%s: jtagmkI_initialize(): "
+        avrdude_message("%s: jtagmkI_initialize(): "
 	      "trying to set baudrate to %d\n",
                 progname, pgm->baudrate);
       if (jtagmkI_setparm(pgm, PARM_BITRATE, b) == 0) {
@@ -586,7 +575,7 @@ static int jtagmkI_initialize(PROGRAMMER * pgm, AVRPART * p)
 
   if (pgm->bitclock != 0.0) {
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkI_initialize(): "
+      avrdude_message("%s: jtagmkI_initialize(): "
 	      "trying to set JTAG clock period to %.1f us\n",
 	      progname, pgm->bitclock);
     if (jtagmkI_set_sck_period(pgm, pgm->bitclock) != 0)
@@ -600,13 +589,12 @@ static int jtagmkI_initialize(PROGRAMMER * pgm, AVRPART * p)
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_initialize(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_initialize(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 
   /*
@@ -621,12 +609,12 @@ static int jtagmkI_initialize(PROGRAMMER * pgm, AVRPART * p)
   free(PDATA(pgm)->flash_pagecache);
   free(PDATA(pgm)->eeprom_pagecache);
   if ((PDATA(pgm)->flash_pagecache = malloc(PDATA(pgm)->flash_pagesize)) == NULL) {
-    fprintf(stderr, "%s: jtagmkI_initialize(): Out of memory\n",
+    avrdude_message("%s: jtagmkI_initialize(): Out of memory\n",
 	    progname);
     return -1;
   }
   if ((PDATA(pgm)->eeprom_pagecache = malloc(PDATA(pgm)->eeprom_pagesize)) == NULL) {
-    fprintf(stderr, "%s: jtagmkI_initialize(): Out of memory\n",
+    avrdude_message("%s: jtagmkI_initialize(): Out of memory\n",
 	    progname);
     free(PDATA(pgm)->flash_pagecache);
     return -1;
@@ -640,10 +628,9 @@ static int jtagmkI_initialize(PROGRAMMER * pgm, AVRPART * p)
   if (jtagmkI_read_byte(pgm, p, &hfuse, 1, &b) < 0)
     return -1;
   if ((b & OCDEN) != 0)
-    fprintf(stderr,
-	    "%s: jtagmkI_initialize(): warning: OCDEN fuse not programmed, "
-	    "single-byte EEPROM updates not possible\n",
-	    progname);
+    avrdude_message("%s: jtagmkI_initialize(): warning: OCDEN fuse not programmed, "
+                    "single-byte EEPROM updates not possible\n",
+                    progname);
 
   return 0;
 }
@@ -671,7 +658,7 @@ static int jtagmkI_open(PROGRAMMER * pgm, char * port)
   size_t i;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_open()\n", progname);
+    avrdude_message("%s: jtagmkI_open()\n", progname);
 
   strcpy(pgm->port, port);
   PDATA(pgm)->initial_baudrate = -1L;
@@ -680,9 +667,8 @@ static int jtagmkI_open(PROGRAMMER * pgm, char * port)
     union pinfo pinfo;
     pinfo.baud = baudtab[i].baud;
     if (verbose >= 2)
-      fprintf(stderr,
-              "%s: jtagmkI_open(): trying to sync at baud rate %ld:\n",
-              progname, pinfo.baud);
+      avrdude_message("%s: jtagmkI_open(): trying to sync at baud rate %ld:\n",
+                      progname, pinfo.baud);
     if (serial_open(port, pinfo, &pgm->fd)==-1) {
       return -1;
     }
@@ -695,16 +681,15 @@ static int jtagmkI_open(PROGRAMMER * pgm, char * port)
     if (jtagmkI_getsync(pgm) == 0) {
       PDATA(pgm)->initial_baudrate = baudtab[i].baud;
       if (verbose >= 2)
-        fprintf(stderr, "%s: jtagmkI_open(): succeeded\n", progname);
+        avrdude_message("%s: jtagmkI_open(): succeeded\n", progname);
       return 0;
     }
 
     serial_close(&pgm->fd);
   }
 
-  fprintf(stderr,
-          "%s: jtagmkI_open(): failed to synchronize to ICE\n",
-          progname);
+  avrdude_message("%s: jtagmkI_open(): failed to synchronize to ICE\n",
+                  progname);
   pgm->fd.ifd = -1;
 
   return -1;
@@ -716,7 +701,7 @@ static void jtagmkI_close(PROGRAMMER * pgm)
   unsigned char b;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_close()\n", progname);
+    avrdude_message("%s: jtagmkI_close()\n", progname);
 
   /*
    * Revert baud rate to what it used to be when we started.  This
@@ -725,11 +710,11 @@ static void jtagmkI_close(PROGRAMMER * pgm)
    */
   if ((serdev->flags & SERDEV_FL_CANSETSPEED) && PDATA(pgm)->initial_baudrate != pgm->baudrate) {
     if ((b = jtagmkI_get_baud(PDATA(pgm)->initial_baudrate)) == 0) {
-      fprintf(stderr, "%s: jtagmkI_close(): unsupported baudrate %d\n",
+      avrdude_message("%s: jtagmkI_close(): unsupported baudrate %d\n",
               progname, PDATA(pgm)->initial_baudrate);
     } else {
       if (verbose >= 2)
-        fprintf(stderr, "%s: jtagmkI_close(): "
+        avrdude_message("%s: jtagmkI_close(): "
                 "trying to set baudrate to %d\n",
                 progname, PDATA(pgm)->initial_baudrate);
       if (jtagmkI_setparm(pgm, PARM_BITRATE, b) == 0) {
@@ -759,7 +744,7 @@ static int jtagmkI_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 #define MAXTRIES 3
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_paged_write(.., %s, %d, %d)\n",
+    avrdude_message("%s: jtagmkI_paged_write(.., %s, %d, %d)\n",
 	    progname, m->desc, page_size, n_bytes);
 
   if (jtagmkI_program_enable(pgm) < 0)
@@ -768,13 +753,13 @@ static int jtagmkI_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   if (page_size == 0) page_size = 256;
 
   if (page_size > 256) {
-    fprintf(stderr, "%s: jtagmkI_paged_write(): page size %d too large\n",
+    avrdude_message("%s: jtagmkI_paged_write(): page size %d too large\n",
 	    progname, page_size);
     return -1;
   }
 
   if ((datacmd = malloc(page_size + 1)) == NULL) {
-    fprintf(stderr, "%s: jtagmkI_paged_write(): Out of memory\n",
+    avrdude_message("%s: jtagmkI_paged_write(): Out of memory\n",
 	    progname);
     return -1;
   }
@@ -798,9 +783,8 @@ static int jtagmkI_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     again:
 
     if (tries != 0 && jtagmkI_resync(pgm, 2000, 0) < 0) {
-      fprintf(stderr,
-	      "%s: jtagmkI_paged_write(): sync loss, retries exhausted\n",
-	      progname);
+      avrdude_message("%s: jtagmkI_paged_write(): sync loss, retries exhausted\n",
+                      progname);
       return -1;
     }
 
@@ -809,7 +793,7 @@ static int jtagmkI_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     else
       block_size = page_size;
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtagmkI_paged_write(): "
+      avrdude_message("%s: jtagmkI_paged_write(): "
 	      "block_size at addr %d is %d\n",
 	      progname, addr, block_size);
 
@@ -824,7 +808,7 @@ static int jtagmkI_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     }
 
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkI_paged_write(): "
+      avrdude_message("%s: jtagmkI_paged_write(): "
 	      "Sending write memory command: ",
 	      progname);
 
@@ -835,17 +819,16 @@ static int jtagmkI_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     if (resp[0] != RESP_OK) {
       if (verbose >= 2)
         putc('\n', stderr);
-      fprintf(stderr,
-              "%s: jtagmkI_paged_write(): "
-              "timeout/error communicating with programmer (resp %c)\n",
-              progname, resp[0]);
+      avrdude_message("%s: jtagmkI_paged_write(): "
+                      "timeout/error communicating with programmer (resp %c)\n",
+                      progname, resp[0]);
       if (tries++ < MAXTRIES)
 	goto again;
       serial_recv_timeout = otimeout;
       return -1;
     } else {
       if (verbose == 2)
-        fprintf(stderr, "OK\n");
+        avrdude_message("OK\n");
     }
 
     /*
@@ -865,17 +848,16 @@ static int jtagmkI_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     if (resp[1] != RESP_OK) {
       if (verbose >= 2)
         putc('\n', stderr);
-      fprintf(stderr,
-              "%s: jtagmkI_paged_write(): "
-              "timeout/error communicating with programmer (resp %c)\n",
-              progname, resp[0]);
+      avrdude_message("%s: jtagmkI_paged_write(): "
+                      "timeout/error communicating with programmer (resp %c)\n",
+                      progname, resp[0]);
       if (tries++ < MAXTRIES)
 	goto again;
       serial_recv_timeout = otimeout;
       return -1;
     } else {
       if (verbose == 2)
-        fprintf(stderr, "OK\n");
+        avrdude_message("OK\n");
     }
   }
 
@@ -897,7 +879,7 @@ static int jtagmkI_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 #define MAXTRIES 3
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_paged_load(.., %s, %d, %d)\n",
+    avrdude_message("%s: jtagmkI_paged_load(.., %s, %d, %d)\n",
 	    progname, m->desc, page_size, n_bytes);
 
   if (jtagmkI_program_enable(pgm) < 0)
@@ -914,7 +896,7 @@ static int jtagmkI_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   }
 
   if (page_size > (is_flash? 512: 256)) {
-    fprintf(stderr, "%s: jtagmkI_paged_load(): page size %d too large\n",
+    avrdude_message("%s: jtagmkI_paged_load(): page size %d too large\n",
 	    progname, page_size);
     return -1;
   }
@@ -924,9 +906,8 @@ static int jtagmkI_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     tries = 0;
     again:
     if (tries != 0 && jtagmkI_resync(pgm, 2000, 0) < 0) {
-      fprintf(stderr,
-	      "%s: jtagmkI_paged_load(): sync loss, retries exhausted\n",
-	      progname);
+      avrdude_message("%s: jtagmkI_paged_load(): sync loss, retries exhausted\n",
+                      progname);
       return -1;
     }
 
@@ -935,7 +916,7 @@ static int jtagmkI_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     else
       block_size = page_size;
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtagmkI_paged_load(): "
+      avrdude_message("%s: jtagmkI_paged_load(): "
 	      "block_size at addr %d is %d\n",
 	      progname, addr, block_size);
 
@@ -950,7 +931,7 @@ static int jtagmkI_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     }
 
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkI_paged_load(): Sending read memory command: ",
+      avrdude_message("%s: jtagmkI_paged_load(): Sending read memory command: ",
 	      progname);
 
     jtagmkI_send(pgm, cmd, 6);
@@ -960,10 +941,9 @@ static int jtagmkI_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     if (resp[read_size + 3 - 1] != RESP_OK) {
       if (verbose >= 2)
         putc('\n', stderr);
-      fprintf(stderr,
-              "%s: jtagmkI_paged_load(): "
-              "timeout/error communicating with programmer (resp %c)\n",
-              progname, resp[read_size + 3 - 1]);
+      avrdude_message("%s: jtagmkI_paged_load(): "
+                      "timeout/error communicating with programmer (resp %c)\n",
+                      progname, resp[read_size + 3 - 1]);
       if (tries++ < MAXTRIES)
 	goto again;
 
@@ -971,7 +951,7 @@ static int jtagmkI_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       return -1;
     } else {
       if (verbose == 2)
-        fprintf(stderr, "OK\n");
+        avrdude_message("OK\n");
     }
 
     memcpy(m->buf + addr, resp + 1, block_size);
@@ -993,7 +973,7 @@ static int jtagmkI_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   int is_flash = 0;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_read_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: jtagmkI_read_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   if (jtagmkI_program_enable(pgm) < 0)
@@ -1077,14 +1057,13 @@ static int jtagmkI_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   if (resp[respsize - 1] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_read_byte(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[respsize - 1]);
+    avrdude_message("%s: jtagmkI_read_byte(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[respsize - 1]);
     return -1;
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 
   if (pagesize) {
@@ -1108,7 +1087,7 @@ static int jtagmkI_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   int len, need_progmode = 1;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_write_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: jtagmkI_write_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   writedata = data;
@@ -1163,14 +1142,13 @@ static int jtagmkI_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_write_byte(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_write_byte(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
     return -1;
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 
   /* Now, send the data buffer. */
@@ -1194,14 +1172,13 @@ static int jtagmkI_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_write_byte(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_write_byte(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
     return -1;
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 
   return 0;
@@ -1246,12 +1223,12 @@ static int jtagmkI_getparm(PROGRAMMER * pgm, unsigned char parm,
   unsigned char buf[2], resp[3];
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_getparm()\n", progname);
+    avrdude_message("%s: jtagmkI_getparm()\n", progname);
 
   buf[0] = CMD_GET_PARAM;
   buf[1] = parm;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_getparm(): "
+    avrdude_message("%s: jtagmkI_getparm(): "
 	    "Sending get parameter command (parm 0x%02x): ",
 	    progname, parm);
   jtagmkI_send(pgm, buf, 2);
@@ -1261,22 +1238,20 @@ static int jtagmkI_getparm(PROGRAMMER * pgm, unsigned char parm,
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_getparm(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_getparm(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
     return -1;
   } else if (resp[2] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_getparm(): "
-	    "unknown parameter 0x%02x\n",
-	    progname, parm);
+    avrdude_message("%s: jtagmkI_getparm(): "
+                    "unknown parameter 0x%02x\n",
+                    progname, parm);
     return -1;
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK, value 0x%02x\n", resp[1]);
+      avrdude_message("OK, value 0x%02x\n", resp[1]);
   }
 
   *value = resp[1];
@@ -1293,13 +1268,13 @@ static int jtagmkI_setparm(PROGRAMMER * pgm, unsigned char parm,
   unsigned char buf[3], resp[2];
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_setparm()\n", progname);
+    avrdude_message("%s: jtagmkI_setparm()\n", progname);
 
   buf[0] = CMD_SET_PARAM;
   buf[1] = parm;
   buf[2] = value;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkI_setparm(): "
+    avrdude_message("%s: jtagmkI_setparm(): "
 	    "Sending set parameter command (parm 0x%02x): ",
 	    progname, parm);
   jtagmkI_send(pgm, buf, 3);
@@ -1308,14 +1283,13 @@ static int jtagmkI_setparm(PROGRAMMER * pgm, unsigned char parm,
   if (resp[0] != RESP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkI_setparm(): "
-	    "timeout/error communicating with programmer (resp %c)\n",
-	    progname, resp[0]);
+    avrdude_message("%s: jtagmkI_setparm(): "
+                    "timeout/error communicating with programmer (resp %c)\n",
+                    progname, resp[0]);
     return -1;
   } else {
     if (verbose == 2)
-      fprintf(stderr, "OK\n");
+      avrdude_message("OK\n");
   }
 
   return 0;
@@ -1331,8 +1305,8 @@ static void jtagmkI_display(PROGRAMMER * pgm, const char * p)
       jtagmkI_getparm(pgm, PARM_SW_VERSION, &fw) < 0)
     return;
 
-  fprintf(stderr, "%sICE hardware version: 0x%02x\n", p, hw);
-  fprintf(stderr, "%sICE firmware version: 0x%02x\n", p, fw);
+  avrdude_message("%sICE hardware version: 0x%02x\n", p, hw);
+  avrdude_message("%sICE firmware version: 0x%02x\n", p, fw);
 
   jtagmkI_print_parms1(pgm, p);
 
@@ -1376,9 +1350,9 @@ static void jtagmkI_print_parms1(PROGRAMMER * pgm, const char * p)
     clk = 1e6;
   }
 
-  fprintf(stderr, "%sVtarget         : %.1f V\n", p,
+  avrdude_message("%sVtarget         : %.1f V\n", p,
 	  6.25 * (unsigned)vtarget / 255.0);
-  fprintf(stderr, "%sJTAG clock      : %s (%.1f us)\n", p, clkstr,
+  avrdude_message("%sJTAG clock      : %s (%.1f us)\n", p, clkstr,
 	  1.0e6 / clk);
 
   return;
diff --git a/jtagmkII.c b/jtagmkII.c
index c641e8a0..0bac91ea 100644
--- a/jtagmkII.c
+++ b/jtagmkII.c
@@ -177,9 +177,8 @@ static int jtagmkII_paged_load32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 void jtagmkII_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: jtagmkII_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: jtagmkII_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -271,7 +270,7 @@ static void jtagmkII_print_memory(unsigned char *b, size_t s)
     return;
 
   for (i = 0; i < s - 1; i++) {
-    fprintf(stderr, "0x%02x ", b[i + 1]);
+    avrdude_message("0x%02x ", b[i + 1]);
     if (i % 16 == 15)
       putc('\n', stderr);
     else
@@ -286,10 +285,10 @@ static void jtagmkII_prmsg(PROGRAMMER * pgm, unsigned char * data, size_t len)
   int i;
 
   if (verbose >= 4) {
-    fprintf(stderr, "Raw message:\n");
+    avrdude_message("Raw message:\n");
 
     for (i = 0; i < len; i++) {
-      fprintf(stderr, "0x%02x", data[i]);
+      avrdude_message("0x%02x", data[i]);
       if (i % 16 == 15)
 	putc('\n', stderr);
       else
@@ -301,121 +300,121 @@ static void jtagmkII_prmsg(PROGRAMMER * pgm, unsigned char * data, size_t len)
 
   switch (data[0]) {
   case RSP_OK:
-    fprintf(stderr, "OK\n");
+    avrdude_message("OK\n");
     break;
 
   case RSP_FAILED:
-    fprintf(stderr, "FAILED\n");
+    avrdude_message("FAILED\n");
     break;
 
   case RSP_ILLEGAL_BREAKPOINT:
-    fprintf(stderr, "Illegal breakpoint\n");
+    avrdude_message("Illegal breakpoint\n");
     break;
 
   case RSP_ILLEGAL_COMMAND:
-    fprintf(stderr, "Illegal command\n");
+    avrdude_message("Illegal command\n");
     break;
 
   case RSP_ILLEGAL_EMULATOR_MODE:
-    fprintf(stderr, "Illegal emulator mode");
+    avrdude_message("Illegal emulator mode");
     if (len > 1)
       switch (data[1]) {
-      case EMULATOR_MODE_DEBUGWIRE: fprintf(stderr, ": DebugWire"); break;
-      case EMULATOR_MODE_JTAG:      fprintf(stderr, ": JTAG"); break;
-      case EMULATOR_MODE_HV:        fprintf(stderr, ": HVSP/PP"); break;
-      case EMULATOR_MODE_SPI:       fprintf(stderr, ": SPI"); break;
-      case EMULATOR_MODE_JTAG_XMEGA: fprintf(stderr, ": JTAG/Xmega"); break;
+      case EMULATOR_MODE_DEBUGWIRE: avrdude_message(": DebugWire"); break;
+      case EMULATOR_MODE_JTAG:      avrdude_message(": JTAG"); break;
+      case EMULATOR_MODE_HV:        avrdude_message(": HVSP/PP"); break;
+      case EMULATOR_MODE_SPI:       avrdude_message(": SPI"); break;
+      case EMULATOR_MODE_JTAG_XMEGA: avrdude_message(": JTAG/Xmega"); break;
       }
     putc('\n', stderr);
     break;
 
   case RSP_ILLEGAL_JTAG_ID:
-    fprintf(stderr, "Illegal JTAG ID\n");
+    avrdude_message("Illegal JTAG ID\n");
     break;
 
   case RSP_ILLEGAL_MCU_STATE:
-    fprintf(stderr, "Illegal MCU state");
+    avrdude_message("Illegal MCU state");
     if (len > 1)
       switch (data[1]) {
-      case STOPPED:     fprintf(stderr, ": Stopped"); break;
-      case RUNNING:     fprintf(stderr, ": Running"); break;
-      case PROGRAMMING: fprintf(stderr, ": Programming"); break;
+      case STOPPED:     avrdude_message(": Stopped"); break;
+      case RUNNING:     avrdude_message(": Running"); break;
+      case PROGRAMMING: avrdude_message(": Programming"); break;
       }
     putc('\n', stderr);
     break;
 
   case RSP_ILLEGAL_MEMORY_TYPE:
-    fprintf(stderr, "Illegal memory type\n");
+    avrdude_message("Illegal memory type\n");
     break;
 
   case RSP_ILLEGAL_MEMORY_RANGE:
-    fprintf(stderr, "Illegal memory range\n");
+    avrdude_message("Illegal memory range\n");
     break;
 
   case RSP_ILLEGAL_PARAMETER:
-    fprintf(stderr, "Illegal parameter\n");
+    avrdude_message("Illegal parameter\n");
     break;
 
   case RSP_ILLEGAL_POWER_STATE:
-    fprintf(stderr, "Illegal power state\n");
+    avrdude_message("Illegal power state\n");
     break;
 
   case RSP_ILLEGAL_VALUE:
-    fprintf(stderr, "Illegal value\n");
+    avrdude_message("Illegal value\n");
     break;
 
   case RSP_NO_TARGET_POWER:
-    fprintf(stderr, "No target power\n");
+    avrdude_message("No target power\n");
     break;
 
   case RSP_SIGN_ON:
-    fprintf(stderr, "Sign-on succeeded\n");
+    avrdude_message("Sign-on succeeded\n");
     /* Sign-on data will be printed below anyway. */
     break;
 
   case RSP_MEMORY:
-    fprintf(stderr, "memory contents:\n");
+    avrdude_message("memory contents:\n");
     jtagmkII_print_memory(data, len);
     break;
 
   case RSP_PARAMETER:
-    fprintf(stderr, "parameter values:\n");
+    avrdude_message("parameter values:\n");
     jtagmkII_print_memory(data, len);
     break;
 
   case RSP_SPI_DATA:
-    fprintf(stderr, "SPI data returned:\n");
+    avrdude_message("SPI data returned:\n");
     for (i = 1; i < len; i++)
-      fprintf(stderr, "0x%02x ", data[i]);
+      avrdude_message("0x%02x ", data[i]);
     putc('\n', stderr);
     break;
 
   case EVT_BREAK:
-    fprintf(stderr, "BREAK event");
+    avrdude_message("BREAK event");
     if (len >= 6) {
-      fprintf(stderr, ", PC = 0x%lx, reason ", b4_to_u32(data + 1));
+      avrdude_message(", PC = 0x%lx, reason ", b4_to_u32(data + 1));
       switch (data[5]) {
       case 0x00:
-	fprintf(stderr, "unspecified");
+	avrdude_message("unspecified");
 	break;
       case 0x01:
-	fprintf(stderr, "program break");
+	avrdude_message("program break");
 	break;
       case 0x02:
-	fprintf(stderr, "data break PDSB");
+	avrdude_message("data break PDSB");
 	break;
       case 0x03:
-	fprintf(stderr, "data break PDMSB");
+	avrdude_message("data break PDMSB");
 	break;
       default:
-	fprintf(stderr, "unknown: 0x%02x", data[5]);
+	avrdude_message("unknown: 0x%02x", data[5]);
       }
     }
     putc('\n', stderr);
     break;
 
   default:
-    fprintf(stderr, "unknown message 0x%02x\n", data[0]);
+    avrdude_message("unknown message 0x%02x\n", data[0]);
   }
 
   putc('\n', stderr);
@@ -427,12 +426,12 @@ int jtagmkII_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   unsigned char *buf;
 
   if (verbose >= 3)
-    fprintf(stderr, "\n%s: jtagmkII_send(): sending %lu bytes\n",
+    avrdude_message("\n%s: jtagmkII_send(): sending %lu bytes\n",
 	    progname, (unsigned long)len);
 
   if ((buf = malloc(len + 10)) == NULL)
     {
-      fprintf(stderr, "%s: jtagmkII_send(): out of memory",
+      avrdude_message("%s: jtagmkII_send(): out of memory",
 	      progname);
       return -1;
     }
@@ -446,9 +445,8 @@ int jtagmkII_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   crcappend(buf, len + 8);
 
   if (serial_send(&pgm->fd, buf, len + 10) != 0) {
-    fprintf(stderr,
-	    "%s: jtagmkII_send(): failed to send command to serial port\n",
-	    progname);
+    avrdude_message("%s: jtagmkII_send(): failed to send command to serial port\n",
+                    progname);
     return -1;
   }
 
@@ -498,7 +496,7 @@ static int jtagmkII_recv_frame(PROGRAMMER * pgm, unsigned char **msg,
   double tstart, tnow;
 
   if (verbose >= 4)
-    fprintf(stderr, "%s: jtagmkII_recv():\n", progname);
+    avrdude_message("%s: jtagmkII_recv():\n", progname);
 
   gettimeofday(&tv, NULL);
   tstart = tv.tv_sec;
@@ -517,9 +515,8 @@ static int jtagmkII_recv_frame(PROGRAMMER * pgm, unsigned char **msg,
 	timedout:
 	/* timeout in receive */
 	if (verbose > 1)
-	  fprintf(stderr,
-		  "%s: jtagmkII_recv(): Timeout receiving packet\n",
-		  progname);
+	  avrdude_message("%s: jtagmkII_recv(): Timeout receiving packet\n",
+                          progname);
 	free(buf);
 	return -1;
       }
@@ -558,14 +555,13 @@ static int jtagmkII_recv_frame(PROGRAMMER * pgm, unsigned char **msg,
         if (c == TOKEN) {
 	  state = sDATA;
 	  if (msglen > MAX_MESSAGE) {
-	    fprintf(stderr,
-		    "%s: jtagmkII_recv(): msglen %lu exceeds max message "
-		    "size %u, ignoring message\n",
-		    progname, msglen, MAX_MESSAGE);
+	    avrdude_message("%s: jtagmkII_recv(): msglen %lu exceeds max message "
+                            "size %u, ignoring message\n",
+                            progname, msglen, MAX_MESSAGE);
 	    state = sSTART;
 	    headeridx = 0;
 	  } else if ((buf = malloc(msglen + 10)) == NULL) {
-	    fprintf(stderr, "%s: jtagmkII_recv(): out of memory\n",
+	    avrdude_message("%s: jtagmkII_recv(): out of memory\n",
 		    progname);
 	    ignorpkt++;
 	  } else {
@@ -587,11 +583,11 @@ static int jtagmkII_recv_frame(PROGRAMMER * pgm, unsigned char **msg,
 	if (state == sCSUM2) {
 	  if (crcverify(buf, msglen + 10)) {
 	    if (verbose >= 9)
-	      fprintf(stderr, "%s: jtagmkII_recv(): CRC OK",
+	      avrdude_message("%s: jtagmkII_recv(): CRC OK",
 		      progname);
 	    state = sDONE;
 	  } else {
-	    fprintf(stderr, "%s: jtagmkII_recv(): checksum error\n",
+	    avrdude_message("%s: jtagmkII_recv(): checksum error\n",
 		    progname);
 	    free(buf);
 	    return -4;
@@ -600,7 +596,7 @@ static int jtagmkII_recv_frame(PROGRAMMER * pgm, unsigned char **msg,
 	  state++;
         break;
       default:
-        fprintf(stderr, "%s: jtagmkII_recv(): unknown state\n",
+        avrdude_message("%s: jtagmkII_recv(): unknown state\n",
                 progname);
 	free(buf);
         return -5;
@@ -609,14 +605,14 @@ static int jtagmkII_recv_frame(PROGRAMMER * pgm, unsigned char **msg,
      gettimeofday(&tv, NULL);
      tnow = tv.tv_sec;
      if (tnow - tstart > timeoutval) {
-       fprintf(stderr, "%s: jtagmkII_recv_frame(): timeout\n",
+       avrdude_message("%s: jtagmkII_recv_frame(): timeout\n",
                progname);
        return -1;
      }
 
   }
   if (verbose >= 3)
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
 
   *seqno = r_seqno;
   *msg = buf;
@@ -632,7 +628,7 @@ int jtagmkII_recv(PROGRAMMER * pgm, unsigned char **msg) {
     if ((rv = jtagmkII_recv_frame(pgm, msg, &r_seqno)) <= 0)
       return rv;
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtagmkII_recv(): "
+      avrdude_message("%s: jtagmkII_recv(): "
 	      "Got message seqno %d (command_sequence == %d)\n",
 	      progname, r_seqno, PDATA(pgm)->command_sequence);
     if (r_seqno == PDATA(pgm)->command_sequence) {
@@ -649,32 +645,32 @@ int jtagmkII_recv(PROGRAMMER * pgm, unsigned char **msg) {
       {
           int i = rv;
           unsigned char *p = *msg;
-          fprintf(stderr, "%s: Recv: ", progname);
+          avrdude_message("%s: Recv: ", progname);
 
           while (i) {
             unsigned char c = *p;
             if (isprint(c)) {
-              fprintf(stderr, "%c ", c);
+              avrdude_message("%c ", c);
             }
             else {
-              fprintf(stderr, ". ");
+              avrdude_message(". ");
             }
-            fprintf(stderr, "[%02x] ", c);
+            avrdude_message("[%02x] ", c);
 
             p++;
             i--;
           }
-          fprintf(stderr, "\n");
+          avrdude_message("\n");
       }
       return rv;
     }
     if (r_seqno == 0xffff) {
       if (verbose >= 3)
-	fprintf(stderr, "%s: jtagmkII_recv(): got asynchronous event\n",
+	avrdude_message("%s: jtagmkII_recv(): got asynchronous event\n",
 		progname);
     } else {
       if (verbose >= 2)
-	fprintf(stderr, "%s: jtagmkII_recv(): "
+	avrdude_message("%s: jtagmkII_recv(): "
 		"got wrong sequence number, %u != %u\n",
 		progname, r_seqno, PDATA(pgm)->command_sequence);
     }
@@ -692,16 +688,15 @@ int jtagmkII_getsync(PROGRAMMER * pgm, int mode) {
   int is_dragon;
 
   if (verbose >= 3)
-    fprintf(stderr, "%s: jtagmkII_getsync()\n", progname);
+    avrdude_message("%s: jtagmkII_getsync()\n", progname);
 
   if (strncmp(pgm->type, "JTAG", strlen("JTAG")) == 0) {
     is_dragon = 0;
   } else if (strncmp(pgm->type, "DRAGON", strlen("DRAGON")) == 0) {
     is_dragon = 1;
   } else {
-    fprintf(stderr,
-            "%s: Programmer is neither JTAG ICE mkII nor AVR Dragon\n",
-            progname);
+    avrdude_message("%s: Programmer is neither JTAG ICE mkII nor AVR Dragon\n",
+                    progname);
     return -1;
   }
   for (tries = 0; tries < MAXTRIES; tries++) {
@@ -709,20 +704,20 @@ int jtagmkII_getsync(PROGRAMMER * pgm, int mode) {
     /* Get the sign-on information. */
     buf[0] = CMND_GET_SIGN_ON;
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkII_getsync(): Sending sign-on command: ",
+      avrdude_message("%s: jtagmkII_getsync(): Sending sign-on command: ",
 	      progname);
     jtagmkII_send(pgm, buf, 1);
 
     status = jtagmkII_recv(pgm, &resp);
     if (status <= 0) {
-	fprintf(stderr, "%s: jtagmkII_getsync(): sign-on command: "
+	avrdude_message("%s: jtagmkII_getsync(): sign-on command: "
 		"status %d\n",
 		progname, status);
     } else if (verbose >= 3) {
       putc('\n', stderr);
       jtagmkII_prmsg(pgm, resp, status);
     } else if (verbose == 2)
-      fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+      avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
 
     if (status > 0) {
       if ((c = resp[0]) == RSP_SIGN_ON) {
@@ -731,28 +726,28 @@ int jtagmkII_getsync(PROGRAMMER * pgm, int mode) {
 	hwver = (unsigned)resp[9];
 	memcpy(PDATA(pgm)->serno, resp + 10, 6);
 	if (verbose >= 1 && status > 17) {
-	  fprintf(stderr, "JTAG ICE mkII sign-on message:\n");
-	  fprintf(stderr, "Communications protocol version: %u\n",
+	  avrdude_message("JTAG ICE mkII sign-on message:\n");
+	  avrdude_message("Communications protocol version: %u\n",
 		  (unsigned)resp[1]);
-	  fprintf(stderr, "M_MCU:\n");
-	  fprintf(stderr, "  boot-loader FW version:        %u\n",
+	  avrdude_message("M_MCU:\n");
+	  avrdude_message("  boot-loader FW version:        %u\n",
 		  (unsigned)resp[2]);
-	  fprintf(stderr, "  firmware version:              %u.%02u\n",
+	  avrdude_message("  firmware version:              %u.%02u\n",
 		  (unsigned)resp[4], (unsigned)resp[3]);
-	  fprintf(stderr, "  hardware version:              %u\n",
+	  avrdude_message("  hardware version:              %u\n",
 		  (unsigned)resp[5]);
-	  fprintf(stderr, "S_MCU:\n");
-	  fprintf(stderr, "  boot-loader FW version:        %u\n",
+	  avrdude_message("S_MCU:\n");
+	  avrdude_message("  boot-loader FW version:        %u\n",
 		  (unsigned)resp[6]);
-	  fprintf(stderr, "  firmware version:              %u.%02u\n",
+	  avrdude_message("  firmware version:              %u.%02u\n",
 		  (unsigned)resp[8], (unsigned)resp[7]);
-	  fprintf(stderr, "  hardware version:              %u\n",
+	  avrdude_message("  hardware version:              %u\n",
 		  (unsigned)resp[9]);
-	  fprintf(stderr, "Serial number:                   "
+	  avrdude_message("Serial number:                   "
 		  "%02x:%02x:%02x:%02x:%02x:%02x\n",
 		  PDATA(pgm)->serno[0], PDATA(pgm)->serno[1], PDATA(pgm)->serno[2], PDATA(pgm)->serno[3], PDATA(pgm)->serno[4], PDATA(pgm)->serno[5]);
 	  resp[status - 1] = '\0';
-	  fprintf(stderr, "Device ID:                       %s\n",
+	  avrdude_message("Device ID:                       %s\n",
 		  resp + 16);
 	}
 	break;
@@ -762,15 +757,13 @@ int jtagmkII_getsync(PROGRAMMER * pgm, int mode) {
   }
   if (tries >= MAXTRIES) {
     if (status <= 0)
-      fprintf(stderr,
-	      "%s: jtagmkII_getsync(): "
-	      "timeout/error communicating with programmer (status %d)\n",
-	      progname, status);
+      avrdude_message("%s: jtagmkII_getsync(): "
+                      "timeout/error communicating with programmer (status %d)\n",
+                      progname, status);
     else
-      fprintf(stderr,
-	      "%s: jtagmkII_getsync(): "
-	      "bad response to sign-on command: %s\n",
-	      progname, jtagmkII_get_rc(c));
+      avrdude_message("%s: jtagmkII_getsync(): "
+                      "bad response to sign-on command: %s\n",
+                      progname, jtagmkII_get_rc(c));
     return -1;
   }
 
@@ -783,47 +776,41 @@ int jtagmkII_getsync(PROGRAMMER * pgm, int mode) {
 #define FWVER(maj, min) ((maj << 8) | (min))
   if (!is_dragon && fwver < FWVER(3, 16)) {
     PDATA(pgm)->device_descriptor_length -= 2;
-    fprintf(stderr,
-	    "%s: jtagmkII_getsync(): "
-	    "S_MCU firmware version might be too old to work correctly\n",
-	    progname);
+    avrdude_message("%s: jtagmkII_getsync(): "
+                    "S_MCU firmware version might be too old to work correctly\n",
+                    progname);
   } else if (!is_dragon && fwver < FWVER(4, 0)) {
     PDATA(pgm)->device_descriptor_length -= 2;
   }
   if (verbose >= 2 && mode != EMULATOR_MODE_SPI)
-    fprintf(stderr,
-	    "%s: jtagmkII_getsync(): Using a %u-byte device descriptor\n",
-	    progname, (unsigned)PDATA(pgm)->device_descriptor_length);
+    avrdude_message("%s: jtagmkII_getsync(): Using a %u-byte device descriptor\n",
+                    progname, (unsigned)PDATA(pgm)->device_descriptor_length);
   if (mode == EMULATOR_MODE_SPI) {
     PDATA(pgm)->device_descriptor_length = 0;
     if (!is_dragon && fwver < FWVER(4, 14)) {
-      fprintf(stderr,
-	      "%s: jtagmkII_getsync(): ISP functionality requires firmware "
-	      "version >= 4.14\n",
-	      progname);
+      avrdude_message("%s: jtagmkII_getsync(): ISP functionality requires firmware "
+                      "version >= 4.14\n",
+                      progname);
       return -1;
     }
   }
   if (mode == EMULATOR_MODE_PDI || mode == EMULATOR_MODE_JTAG_XMEGA) {
     if (!is_dragon && mode == EMULATOR_MODE_PDI && hwver < 1) {
-      fprintf(stderr,
-	      "%s: jtagmkII_getsync(): Xmega PDI support requires hardware "
-	      "revision >= 1\n",
-	      progname);
+      avrdude_message("%s: jtagmkII_getsync(): Xmega PDI support requires hardware "
+                      "revision >= 1\n",
+                      progname);
       return -1;
     }
     if (!is_dragon && fwver < FWVER(5, 37)) {
-      fprintf(stderr,
-	      "%s: jtagmkII_getsync(): Xmega support requires firmware "
-	      "version >= 5.37\n",
-	      progname);
+      avrdude_message("%s: jtagmkII_getsync(): Xmega support requires firmware "
+                      "version >= 5.37\n",
+                      progname);
       return -1;
     }
     if (is_dragon && fwver < FWVER(6, 11)) {
-      fprintf(stderr,
-	      "%s: jtagmkII_getsync(): Xmega support requires firmware "
-	      "version >= 6.11\n",
-	      progname);
+      avrdude_message("%s: jtagmkII_getsync(): Xmega support requires firmware "
+                      "version >= 6.11\n",
+                      progname);
       return -1;
     }
   }
@@ -837,10 +824,9 @@ retry:
   buf[0] = mode;
   if (jtagmkII_setparm(pgm, PAR_EMULATOR_MODE, buf) < 0) {
     if (mode == EMULATOR_MODE_SPI) {
-      fprintf(stderr,
-	      "%s: jtagmkII_getsync(): "
-	      "ISP activation failed, trying debugWire\n",
-	      progname);
+      avrdude_message("%s: jtagmkII_getsync(): "
+                      "ISP activation failed, trying debugWire\n",
+                      progname);
       buf[0] = EMULATOR_MODE_DEBUGWIRE;
       if (jtagmkII_setparm(pgm, PAR_EMULATOR_MODE, buf) < 0)
 	return -1;
@@ -858,15 +844,13 @@ retry:
 	 */
 	(void)jtagmkII_reset(pgm, 0x04);
 	if (tries++ > 3) {
-	    fprintf(stderr,
-		    "%s: Failed to return from debugWIRE to ISP.\n",
-		    progname);
+	    avrdude_message("%s: Failed to return from debugWIRE to ISP.\n",
+                            progname);
 	    return -1;
 	}
-	fprintf(stderr,
-		"%s: Target prepared for ISP, signed off.\n"
-		"%s: Now retrying without power-cycling the target.\n",
-		progname, progname);
+	avrdude_message("%s: Target prepared for ISP, signed off.\n"
+                        "%s: Now retrying without power-cycling the target.\n",
+                        progname, progname);
         goto retry;
       }
     } else {
@@ -877,7 +861,7 @@ retry:
   /* GET SYNC forces the target into STOPPED mode */
   buf[0] = CMND_GET_SYNC;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_getsync(): Sending get sync command: ",
+    avrdude_message("%s: jtagmkII_getsync(): Sending get sync command: ",
 	    progname);
   jtagmkII_send(pgm, buf, 1);
 
@@ -885,24 +869,22 @@ retry:
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_getsync(): "
-	    "timeout/error communicating with programmer (status %d)\n",
-	    progname, status);
+    avrdude_message("%s: jtagmkII_getsync(): "
+                    "timeout/error communicating with programmer (status %d)\n",
+                    progname, status);
     return -1;
   }
   if (verbose >= 3) {
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_getsync(): "
-	    "bad response to set parameter command: %s\n",
-	    progname, jtagmkII_get_rc(c));
+    avrdude_message("%s: jtagmkII_getsync(): "
+                    "bad response to set parameter command: %s\n",
+                    progname, jtagmkII_get_rc(c));
     return -1;
   }
 
@@ -927,34 +909,31 @@ static int jtagmkII_chip_erase(PROGRAMMER * pgm, AVRPART * p)
     len = 1;
   }
   if (verbose >= 2)
-    fprintf(stderr,
-            "%s: jtagmkII_chip_erase(): Sending %schip erase command: ",
-	    progname,
-            (p->flags & AVRPART_HAS_PDI)? "Xmega ": "");
+    avrdude_message("%s: jtagmkII_chip_erase(): Sending %schip erase command: ",
+                    progname,
+                    (p->flags & AVRPART_HAS_PDI)? "Xmega ": "");
   jtagmkII_send(pgm, buf, len);
 
   status = jtagmkII_recv(pgm, &resp);
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_chip_erase(): "
-	    "timeout/error communicating with programmer (status %d)\n",
-	    progname, status);
+    avrdude_message("%s: jtagmkII_chip_erase(): "
+                    "timeout/error communicating with programmer (status %d)\n",
+                    progname, status);
     return -1;
   }
   if (verbose >= 3) {
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_chip_erase(): "
-	    "bad response to chip erase command: %s\n",
-	    progname, jtagmkII_get_rc(c));
+    avrdude_message("%s: jtagmkII_chip_erase(): "
+                    "bad response to chip erase command: %s\n",
+                    progname, jtagmkII_get_rc(c));
     return -1;
   }
 
@@ -970,7 +949,7 @@ static int jtagmkII_chip_erase(PROGRAMMER * pgm, AVRPART * p)
 static int jtagmkII_chip_erase_dw(PROGRAMMER * pgm, AVRPART * p)
 {
 
-  fprintf(stderr, "%s: Chip erase not supported in debugWire mode\n",
+  avrdude_message("%s: Chip erase not supported in debugWire mode\n",
 	  progname);
 
   return 0;
@@ -1019,7 +998,7 @@ static void jtagmkII_set_devdescr(PROGRAMMER * pgm, AVRPART * p)
     (p->flags & AVRPART_HAS_PDI)? 0x02 /* ATxmega */: 0x00;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_set_devdescr(): "
+    avrdude_message("%s: jtagmkII_set_devdescr(): "
 	    "Sending set device descriptor command: ",
 	    progname);
   jtagmkII_send(pgm, (unsigned char *)&sendbuf,
@@ -1029,24 +1008,22 @@ static void jtagmkII_set_devdescr(PROGRAMMER * pgm, AVRPART * p)
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_set_devdescr(): "
-	    "timeout/error communicating with programmer (status %d)\n",
-	    progname, status);
+    avrdude_message("%s: jtagmkII_set_devdescr(): "
+                    "timeout/error communicating with programmer (status %d)\n",
+                    progname, status);
     return;
   }
   if (verbose >= 3) {
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_set_devdescr(): "
-	    "bad response to set device descriptor command: %s\n",
-	    progname, jtagmkII_get_rc(c));
+    avrdude_message("%s: jtagmkII_set_devdescr(): "
+                    "bad response to set device descriptor command: %s\n",
+                    progname, jtagmkII_get_rc(c));
   }
 }
 
@@ -1100,7 +1077,7 @@ static void jtagmkII_set_xmega_params(PROGRAMMER * pgm, AVRPART * p)
   }
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_set_xmega_params(): "
+    avrdude_message("%s: jtagmkII_set_xmega_params(): "
 	    "Sending set Xmega params command: ",
 	    progname);
   jtagmkII_send(pgm, (unsigned char *)&sendbuf, sizeof sendbuf);
@@ -1109,24 +1086,22 @@ static void jtagmkII_set_xmega_params(PROGRAMMER * pgm, AVRPART * p)
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_set_xmega_params(): "
-	    "timeout/error communicating with programmer (status %d)\n",
-	    progname, status);
+    avrdude_message("%s: jtagmkII_set_xmega_params(): "
+                    "timeout/error communicating with programmer (status %d)\n",
+                    progname, status);
     return;
   }
   if (verbose >= 3) {
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_set_xmega_params(): "
-	    "bad response to set device descriptor command: %s\n",
-	    progname, jtagmkII_get_rc(c));
+    avrdude_message("%s: jtagmkII_set_xmega_params(): "
+                    "bad response to set device descriptor command: %s\n",
+                    progname, jtagmkII_get_rc(c));
   }
 }
 
@@ -1151,7 +1126,7 @@ static int jtagmkII_reset(PROGRAMMER * pgm, unsigned char flags)
   buf[0] = (pgm->flag & PGM_FL_IS_DW)? CMND_FORCED_STOP: CMND_RESET;
   buf[1] = (pgm->flag & PGM_FL_IS_DW)? 1: flags;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_reset(): Sending %s command: ",
+    avrdude_message("%s: jtagmkII_reset(): Sending %s command: ",
 	    progname, (pgm->flag & PGM_FL_IS_DW)? "stop": "reset");
   jtagmkII_send(pgm, buf, 2);
 
@@ -1159,24 +1134,22 @@ static int jtagmkII_reset(PROGRAMMER * pgm, unsigned char flags)
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_reset(): "
-	    "timeout/error communicating with programmer (status %d)\n",
-	    progname, status);
+    avrdude_message("%s: jtagmkII_reset(): "
+                    "timeout/error communicating with programmer (status %d)\n",
+                    progname, status);
     return -1;
   }
   if (verbose >= 3) {
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_reset(): "
-	    "bad response to reset command: %s\n",
-	    progname, jtagmkII_get_rc(c));
+    avrdude_message("%s: jtagmkII_reset(): "
+                    "bad response to reset command: %s\n",
+                    progname, jtagmkII_get_rc(c));
     return -1;
   }
 
@@ -1200,7 +1173,7 @@ static int jtagmkII_program_enable(PROGRAMMER * pgm)
   for (use_ext_reset = 0; use_ext_reset <= 1; use_ext_reset++) {
     buf[0] = CMND_ENTER_PROGMODE;
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkII_program_enable(): "
+      avrdude_message("%s: jtagmkII_program_enable(): "
 	      "Sending enter progmode command: ",
 	      progname);
     jtagmkII_send(pgm, buf, 1);
@@ -1209,37 +1182,34 @@ static int jtagmkII_program_enable(PROGRAMMER * pgm)
     if (status <= 0) {
       if (verbose >= 2)
 	putc('\n', stderr);
-      fprintf(stderr,
-	      "%s: jtagmkII_program_enable(): "
-	      "timeout/error communicating with programmer (status %d)\n",
-	      progname, status);
+      avrdude_message("%s: jtagmkII_program_enable(): "
+                      "timeout/error communicating with programmer (status %d)\n",
+                      progname, status);
       return -1;
     }
     if (verbose >= 3) {
       putc('\n', stderr);
       jtagmkII_prmsg(pgm, resp, status);
     } else if (verbose == 2)
-      fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+      avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
     c = resp[0];
     free(resp);
     if (c != RSP_OK) {
-      fprintf(stderr,
-	      "%s: jtagmkII_program_enable(): "
-	      "bad response to enter progmode command: %s\n",
-	      progname, jtagmkII_get_rc(c));
+      avrdude_message("%s: jtagmkII_program_enable(): "
+                      "bad response to enter progmode command: %s\n",
+                      progname, jtagmkII_get_rc(c));
       if (c == RSP_ILLEGAL_JTAG_ID) {
 	if (use_ext_reset == 0) {
 	  unsigned char parm[] = { 1};
 	  if (verbose > 0)
-	    fprintf(stderr,
-		    "%s: retrying with external reset applied\n",
-		    progname);
+	    avrdude_message("%s: retrying with external reset applied\n",
+                            progname);
 
 	  (void)jtagmkII_setparm(pgm, PAR_EXTERNAL_RESET, parm);
 	  continue;
 	}
 
-	fprintf(stderr, "%s: JTAGEN fuse disabled?\n", progname);
+	avrdude_message("%s: JTAGEN fuse disabled?\n", progname);
 	return -1;
       }
     }
@@ -1259,7 +1229,7 @@ static int jtagmkII_program_disable(PROGRAMMER * pgm)
 
   buf[0] = CMND_LEAVE_PROGMODE;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_program_disable(): "
+    avrdude_message("%s: jtagmkII_program_disable(): "
 	    "Sending leave progmode command: ",
 	    progname);
   jtagmkII_send(pgm, buf, 1);
@@ -1268,24 +1238,22 @@ static int jtagmkII_program_disable(PROGRAMMER * pgm)
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_program_disable(): "
-	    "timeout/error communicating with programmer (status %d)\n",
-	    progname, status);
+    avrdude_message("%s: jtagmkII_program_disable(): "
+                    "timeout/error communicating with programmer (status %d)\n",
+                    progname, status);
     return -1;
   }
   if (verbose >= 3) {
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_program_disable(): "
-	    "bad response to leave progmode command: %s\n",
-	    progname, jtagmkII_get_rc(c));
+    avrdude_message("%s: jtagmkII_program_disable(): "
+                    "bad response to leave progmode command: %s\n",
+                    progname, jtagmkII_get_rc(c));
     return -1;
   }
 
@@ -1345,18 +1313,18 @@ static int jtagmkII_initialize(PROGRAMMER * pgm, AVRPART * p)
   }
 
   if (!ok) {
-    fprintf(stderr, "%s: jtagmkII_initialize(): part %s has no %s interface\n",
+    avrdude_message("%s: jtagmkII_initialize(): part %s has no %s interface\n",
 	    progname, p->desc, ifname);
     return -1;
   }
 
   if ((serdev->flags & SERDEV_FL_CANSETSPEED) && pgm->baudrate && pgm->baudrate != 19200) {
     if ((b = jtagmkII_get_baud(pgm->baudrate)) == 0) {
-      fprintf(stderr, "%s: jtagmkII_initialize(): unsupported baudrate %d\n",
+      avrdude_message("%s: jtagmkII_initialize(): unsupported baudrate %d\n",
 	      progname, pgm->baudrate);
     } else {
       if (verbose >= 2)
-	fprintf(stderr, "%s: jtagmkII_initialize(): "
+	avrdude_message("%s: jtagmkII_initialize(): "
 		"trying to set baudrate to %d\n",
 		progname, pgm->baudrate);
       if (jtagmkII_setparm(pgm, PAR_BAUD_RATE, &b) == 0)
@@ -1365,7 +1333,7 @@ static int jtagmkII_initialize(PROGRAMMER * pgm, AVRPART * p)
   }
   if ((pgm->flag & PGM_FL_IS_JTAG) && pgm->bitclock != 0.0) {
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkII_initialize(): "
+      avrdude_message("%s: jtagmkII_initialize(): "
 	      "trying to set JTAG clock period to %.1f us\n",
 	      progname, pgm->bitclock);
     if (jtagmkII_set_sck_period(pgm, pgm->bitclock) != 0)
@@ -1374,7 +1342,7 @@ static int jtagmkII_initialize(PROGRAMMER * pgm, AVRPART * p)
 
   if ((pgm->flag & PGM_FL_IS_JTAG) &&
       jtagmkII_setparm(pgm, PAR_DAISY_CHAIN_INFO, PDATA(pgm)->jtagchain) < 0) {
-    fprintf(stderr, "%s: jtagmkII_initialize(): Failed to setup JTAG chain\n",
+    avrdude_message("%s: jtagmkII_initialize(): Failed to setup JTAG chain\n",
             progname);
     return -1;
   }
@@ -1410,9 +1378,8 @@ static int jtagmkII_initialize(PROGRAMMER * pgm, AVRPART * p)
     AVRMEM *bootmem = avr_locate_mem(p, "boot");
     AVRMEM *flashmem = avr_locate_mem(p, "flash");
     if (bootmem == NULL || flashmem == NULL) {
-      fprintf(stderr,
-              "%s: jtagmkII_initialize(): Cannot locate \"flash\" and \"boot\" memories in description\n",
-              progname);
+      avrdude_message("%s: jtagmkII_initialize(): Cannot locate \"flash\" and \"boot\" memories in description\n",
+                      progname);
     } else {
       if (PDATA(pgm)->fwver < 0x700) {
         /* V7+ firmware does not need this anymore */
@@ -1431,12 +1398,12 @@ static int jtagmkII_initialize(PROGRAMMER * pgm, AVRPART * p)
   free(PDATA(pgm)->flash_pagecache);
   free(PDATA(pgm)->eeprom_pagecache);
   if ((PDATA(pgm)->flash_pagecache = malloc(PDATA(pgm)->flash_pagesize)) == NULL) {
-    fprintf(stderr, "%s: jtagmkII_initialize(): Out of memory\n",
+    avrdude_message("%s: jtagmkII_initialize(): Out of memory\n",
 	    progname);
     return -1;
   }
   if ((PDATA(pgm)->eeprom_pagecache = malloc(PDATA(pgm)->eeprom_pagesize)) == NULL) {
-    fprintf(stderr, "%s: jtagmkII_initialize(): Out of memory\n",
+    avrdude_message("%s: jtagmkII_initialize(): Out of memory\n",
 	    progname);
     free(PDATA(pgm)->flash_pagecache);
     return -1;
@@ -1465,10 +1432,9 @@ static int jtagmkII_initialize(PROGRAMMER * pgm, AVRPART * p)
     if (jtagmkII_read_byte(pgm, p, &hfuse, 1, &b) < 0)
       return -1;
     if ((b & OCDEN) != 0)
-      fprintf(stderr,
-	      "%s: jtagmkII_initialize(): warning: OCDEN fuse not programmed, "
-	      "single-byte EEPROM updates not possible\n",
-	      progname);
+      avrdude_message("%s: jtagmkII_initialize(): warning: OCDEN fuse not programmed, "
+                      "single-byte EEPROM updates not possible\n",
+                      progname);
   }
 
   return 0;
@@ -1508,18 +1474,16 @@ static int jtagmkII_parseextparms(PROGRAMMER * pgm, LISTID extparms)
       unsigned int ub, ua, bb, ba;
       if (sscanf(extended_param, "jtagchain=%u,%u,%u,%u", &ub, &ua, &bb, &ba)
           != 4) {
-        fprintf(stderr,
-                "%s: jtagmkII_parseextparms(): invalid JTAG chain '%s'\n",
-                progname, extended_param);
+        avrdude_message("%s: jtagmkII_parseextparms(): invalid JTAG chain '%s'\n",
+                        progname, extended_param);
         rv = -1;
         continue;
       }
       if (verbose >= 2) {
-        fprintf(stderr,
-                "%s: jtagmkII_parseextparms(): JTAG chain parsed as:\n"
-                "%s %u units before, %u units after, %u bits before, %u bits after\n",
-                progname,
-                progbuf, ub, ua, bb, ba);
+        avrdude_message("%s: jtagmkII_parseextparms(): JTAG chain parsed as:\n"
+                        "%s %u units before, %u units after, %u bits before, %u bits after\n",
+                        progname,
+                        progbuf, ub, ua, bb, ba);
       }
       PDATA(pgm)->jtagchain[0] = ub;
       PDATA(pgm)->jtagchain[1] = ua;
@@ -1529,9 +1493,8 @@ static int jtagmkII_parseextparms(PROGRAMMER * pgm, LISTID extparms)
       continue;
     }
 
-    fprintf(stderr,
-            "%s: jtagmkII_parseextparms(): invalid extended parameter '%s'\n",
-            progname, extended_param);
+    avrdude_message("%s: jtagmkII_parseextparms(): invalid extended parameter '%s'\n",
+                    progname, extended_param);
     rv = -1;
   }
 
@@ -1544,7 +1507,7 @@ static int jtagmkII_open(PROGRAMMER * pgm, char * port)
   union pinfo pinfo;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_open()\n", progname);
+    avrdude_message("%s: jtagmkII_open()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -1571,7 +1534,7 @@ static int jtagmkII_open(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1597,7 +1560,7 @@ static int jtagmkII_open_dw(PROGRAMMER * pgm, char * port)
   union pinfo pinfo;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_open_dw()\n", progname);
+    avrdude_message("%s: jtagmkII_open_dw()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -1624,7 +1587,7 @@ static int jtagmkII_open_dw(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1650,7 +1613,7 @@ static int jtagmkII_open_pdi(PROGRAMMER * pgm, char * port)
   union pinfo pinfo;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_open_pdi()\n", progname);
+    avrdude_message("%s: jtagmkII_open_pdi()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -1677,7 +1640,7 @@ static int jtagmkII_open_pdi(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1704,7 +1667,7 @@ static int jtagmkII_dragon_open(PROGRAMMER * pgm, char * port)
   union pinfo pinfo;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_dragon_open()\n", progname);
+    avrdude_message("%s: jtagmkII_dragon_open()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -1731,7 +1694,7 @@ static int jtagmkII_dragon_open(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1758,7 +1721,7 @@ static int jtagmkII_dragon_open_dw(PROGRAMMER * pgm, char * port)
   union pinfo pinfo;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_dragon_open_dw()\n", progname);
+    avrdude_message("%s: jtagmkII_dragon_open_dw()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -1785,7 +1748,7 @@ static int jtagmkII_dragon_open_dw(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1812,7 +1775,7 @@ static int jtagmkII_dragon_open_pdi(PROGRAMMER * pgm, char * port)
   union pinfo pinfo;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_dragon_open_pdi()\n", progname);
+    avrdude_message("%s: jtagmkII_dragon_open_pdi()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -1839,7 +1802,7 @@ static int jtagmkII_dragon_open_pdi(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1867,13 +1830,13 @@ void jtagmkII_close(PROGRAMMER * pgm)
   unsigned char buf[1], *resp, c;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_close()\n", progname);
+    avrdude_message("%s: jtagmkII_close()\n", progname);
 
   if (pgm->flag & PGM_FL_IS_PDI) {
     /* When in PDI mode, restart target. */
     buf[0] = CMND_GO;
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkII_close(): Sending GO command: ",
+      avrdude_message("%s: jtagmkII_close(): Sending GO command: ",
 	      progname);
     jtagmkII_send(pgm, buf, 1);
 
@@ -1881,30 +1844,28 @@ void jtagmkII_close(PROGRAMMER * pgm)
     if (status <= 0) {
       if (verbose >= 2)
 	putc('\n', stderr);
-      fprintf(stderr,
-	      "%s: jtagmkII_close(): "
-	      "timeout/error communicating with programmer (status %d)\n",
-	      progname, status);
+      avrdude_message("%s: jtagmkII_close(): "
+                      "timeout/error communicating with programmer (status %d)\n",
+                      progname, status);
     } else {
       if (verbose >= 3) {
 	putc('\n', stderr);
 	jtagmkII_prmsg(pgm, resp, status);
       } else if (verbose == 2)
-	fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+	avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
       c = resp[0];
       free(resp);
       if (c != RSP_OK) {
-	fprintf(stderr,
-		"%s: jtagmkII_close(): "
-		"bad response to GO command: %s\n",
-		progname, jtagmkII_get_rc(c));
+	avrdude_message("%s: jtagmkII_close(): "
+                        "bad response to GO command: %s\n",
+                        progname, jtagmkII_get_rc(c));
       }
     }
   }
 
   buf[0] = CMND_SIGN_OFF;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_close(): Sending sign-off command: ",
+    avrdude_message("%s: jtagmkII_close(): Sending sign-off command: ",
 	    progname);
   jtagmkII_send(pgm, buf, 1);
 
@@ -1912,24 +1873,22 @@ void jtagmkII_close(PROGRAMMER * pgm)
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_close(): "
-	    "timeout/error communicating with programmer (status %d)\n",
-	    progname, status);
+    avrdude_message("%s: jtagmkII_close(): "
+                    "timeout/error communicating with programmer (status %d)\n",
+                    progname, status);
     return;
   }
   if (verbose >= 3) {
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_close(): "
-	    "bad response to sign-off command: %s\n",
-	    progname, jtagmkII_get_rc(c));
+    avrdude_message("%s: jtagmkII_close(): "
+                    "bad response to sign-off command: %s\n",
+                    progname, jtagmkII_get_rc(c));
   }
 
   serial_close(&pgm->fd);
@@ -1945,16 +1904,16 @@ static int jtagmkII_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   long otimeout = serial_recv_timeout;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_page_erase(.., %s, 0x%x)\n",
+    avrdude_message("%s: jtagmkII_page_erase(.., %s, 0x%x)\n",
 	    progname, m->desc, addr);
 
   if (!(p->flags & AVRPART_HAS_PDI)) {
-    fprintf(stderr, "%s: jtagmkII_page_erase: not an Xmega device\n",
+    avrdude_message("%s: jtagmkII_page_erase: not an Xmega device\n",
 	    progname);
     return -1;
   }
   if ((pgm->flag & PGM_FL_IS_DW)) {
-    fprintf(stderr, "%s: jtagmkII_page_erase: not applicable to debugWIRE\n",
+    avrdude_message("%s: jtagmkII_page_erase: not applicable to debugWIRE\n",
 	    progname);
     return -1;
   }
@@ -1991,7 +1950,7 @@ static int jtagmkII_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
   retry:
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_page_erase(): "
+    avrdude_message("%s: jtagmkII_page_erase(): "
             "Sending xmega erase command: ",
             progname);
   jtagmkII_send(pgm, cmd, sizeof cmd);
@@ -2001,18 +1960,16 @@ static int jtagmkII_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     if (verbose >= 2)
       putc('\n', stderr);
     if (verbose >= 1)
-      fprintf(stderr,
-              "%s: jtagmkII_page_erase(): "
-              "timeout/error communicating with programmer (status %d)\n",
-              progname, status);
+      avrdude_message("%s: jtagmkII_page_erase(): "
+                      "timeout/error communicating with programmer (status %d)\n",
+                      progname, status);
     if (tries++ < 4) {
       serial_recv_timeout *= 2;
       goto retry;
     }
-    fprintf(stderr,
-            "%s: jtagmkII_page_erase(): fatal timeout/"
-            "error communicating with programmer (status %d)\n",
-            progname, status);
+    avrdude_message("%s: jtagmkII_page_erase(): fatal timeout/"
+                    "error communicating with programmer (status %d)\n",
+                    progname, status);
     serial_recv_timeout = otimeout;
     return -1;
   }
@@ -2020,12 +1977,11 @@ static int jtagmkII_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   if (resp[0] != RSP_OK) {
-    fprintf(stderr,
-            "%s: jtagmkII_page_erase(): "
-            "bad response to xmega erase command: %s\n",
-            progname, jtagmkII_get_rc(resp[0]));
+    avrdude_message("%s: jtagmkII_page_erase(): "
+                    "bad response to xmega erase command: %s\n",
+                    progname, jtagmkII_get_rc(resp[0]));
     free(resp);
     serial_recv_timeout = otimeout;
     return -1;
@@ -2049,7 +2005,7 @@ static int jtagmkII_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   long otimeout = serial_recv_timeout;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_paged_write(.., %s, %d, %d)\n",
+    avrdude_message("%s: jtagmkII_paged_write(.., %s, %d, %d)\n",
 	    progname, m->desc, page_size, n_bytes);
 
   if (!(pgm->flag & PGM_FL_IS_DW) && jtagmkII_program_enable(pgm) < 0)
@@ -2059,7 +2015,7 @@ static int jtagmkII_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   else if (page_size > 256) page_size = 256;
 
   if ((cmd = malloc(page_size + 10)) == NULL) {
-    fprintf(stderr, "%s: jtagmkII_paged_write(): Out of memory\n",
+    avrdude_message("%s: jtagmkII_paged_write(): Out of memory\n",
 	    progname);
     return -1;
   }
@@ -2105,7 +2061,7 @@ static int jtagmkII_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     else
       block_size = page_size;
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtagmkII_paged_write(): "
+      avrdude_message("%s: jtagmkII_paged_write(): "
 	      "block_size at addr %d is %d\n",
 	      progname, addr, block_size);
 
@@ -2129,7 +2085,7 @@ static int jtagmkII_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
     retry:
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkII_paged_write(): "
+      avrdude_message("%s: jtagmkII_paged_write(): "
 	      "Sending write memory command: ",
 	      progname);
     jtagmkII_send(pgm, cmd, page_size + 10);
@@ -2139,18 +2095,16 @@ static int jtagmkII_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       if (verbose >= 2)
 	putc('\n', stderr);
       if (verbose >= 1)
-	fprintf(stderr,
-		"%s: jtagmkII_paged_write(): "
-		"timeout/error communicating with programmer (status %d)\n",
-		progname, status);
+	avrdude_message("%s: jtagmkII_paged_write(): "
+                        "timeout/error communicating with programmer (status %d)\n",
+                        progname, status);
       if (tries++ < 4) {
 	serial_recv_timeout *= 2;
 	goto retry;
       }
-      fprintf(stderr,
-	      "%s: jtagmkII_paged_write(): fatal timeout/"
-	      "error communicating with programmer (status %d)\n",
-	      progname, status);
+      avrdude_message("%s: jtagmkII_paged_write(): fatal timeout/"
+                      "error communicating with programmer (status %d)\n",
+                      progname, status);
       free(cmd);
       serial_recv_timeout = otimeout;
       return -1;
@@ -2159,12 +2113,11 @@ static int jtagmkII_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       putc('\n', stderr);
       jtagmkII_prmsg(pgm, resp, status);
     } else if (verbose == 2)
-      fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+      avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
     if (resp[0] != RSP_OK) {
-      fprintf(stderr,
-	      "%s: jtagmkII_paged_write(): "
-	      "bad response to write memory command: %s\n",
-	      progname, jtagmkII_get_rc(resp[0]));
+      avrdude_message("%s: jtagmkII_paged_write(): "
+                      "bad response to write memory command: %s\n",
+                      progname, jtagmkII_get_rc(resp[0]));
       free(resp);
       free(cmd);
       serial_recv_timeout = otimeout;
@@ -2191,7 +2144,7 @@ static int jtagmkII_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   long otimeout = serial_recv_timeout;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_paged_load(.., %s, %d, %d)\n",
+    avrdude_message("%s: jtagmkII_paged_load(.., %s, %d, %d)\n",
 	    progname, m->desc, page_size, n_bytes);
 
   if (!(pgm->flag & PGM_FL_IS_DW) && jtagmkII_program_enable(pgm) < 0)
@@ -2227,7 +2180,7 @@ static int jtagmkII_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     else
       block_size = page_size;
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtagmkII_paged_load(): "
+      avrdude_message("%s: jtagmkII_paged_load(): "
 	      "block_size at addr %d is %d\n",
 	      progname, addr, block_size);
 
@@ -2241,7 +2194,7 @@ static int jtagmkII_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
     retry:
     if (verbose >= 2)
-      fprintf(stderr, "%s: jtagmkII_paged_load(): Sending read memory command: ",
+      avrdude_message("%s: jtagmkII_paged_load(): Sending read memory command: ",
 	      progname);
     jtagmkII_send(pgm, cmd, 10);
 
@@ -2250,18 +2203,16 @@ static int jtagmkII_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       if (verbose >= 2)
 	putc('\n', stderr);
       if (verbose >= 1)
-	fprintf(stderr,
-		"%s: jtagmkII_paged_load(): "
-		"timeout/error communicating with programmer (status %d)\n",
-		progname, status);
+	avrdude_message("%s: jtagmkII_paged_load(): "
+                        "timeout/error communicating with programmer (status %d)\n",
+                        progname, status);
       if (tries++ < 4) {
 	serial_recv_timeout *= 2;
 	goto retry;
       }
-      fprintf(stderr,
-	      "%s: jtagmkII_paged_load(): fatal timeout/"
-	      "error communicating with programmer (status %d)\n",
-	      progname, status);
+      avrdude_message("%s: jtagmkII_paged_load(): fatal timeout/"
+                      "error communicating with programmer (status %d)\n",
+                      progname, status);
       serial_recv_timeout = otimeout;
       return -1;
     }
@@ -2269,10 +2220,9 @@ static int jtagmkII_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       putc('\n', stderr);
       jtagmkII_prmsg(pgm, resp, status);
     } else if (verbose == 2)
-      fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+      avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
     if (resp[0] != RSP_MEMORY) {
-      fprintf(stderr,
-	      "%s: jtagmkII_paged_load(): "
+      avrdude_message("%s: jtagmkII_paged_load(): "
 	      "bad response to read memory command: %s\n",
 	      progname, jtagmkII_get_rc(resp[0]));
       free(resp);
@@ -2297,7 +2247,7 @@ static int jtagmkII_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   unsigned int pagesize = 0;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_read_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: jtagmkII_read_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   if (!(pgm->flag & PGM_FL_IS_DW) && jtagmkII_program_enable(pgm) < 0)
@@ -2380,7 +2330,7 @@ static int jtagmkII_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 	break;
 
       default:
-	fprintf(stderr, "%s: illegal address %lu for signature memory\n",
+	avrdude_message("%s: illegal address %lu for signature memory\n",
 		progname, addr);
 	return -1;
       }
@@ -2423,7 +2373,7 @@ static int jtagmkII_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   tries = 0;
   retry:
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_read_byte(): Sending read memory command: ",
+    avrdude_message("%s: jtagmkII_read_byte(): Sending read memory command: ",
 	    progname);
   jtagmkII_send(pgm, cmd, 10);
 
@@ -2432,14 +2382,12 @@ static int jtagmkII_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     if (verbose >= 2)
       putc('\n', stderr);
     if (verbose >= 1)
-      fprintf(stderr,
-	      "%s: jtagmkII_read_byte(): "
+      avrdude_message("%s: jtagmkII_read_byte(): "
 	      "timeout/error communicating with programmer (status %d)\n",
 	      progname, status);
     if (tries++ < 3)
       goto retry;
-    fprintf(stderr,
-	    "%s: jtagmkII_read_byte(): "
+    avrdude_message("%s: jtagmkII_read_byte(): "
 	    "fatal timeout/error communicating with programmer (status %d)\n",
 	    progname, status);
     if (status < 0)
@@ -2450,10 +2398,9 @@ static int jtagmkII_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   if (resp[0] != RSP_MEMORY) {
-    fprintf(stderr,
-	    "%s: jtagmkII_read_byte(): "
+    avrdude_message("%s: jtagmkII_read_byte(): "
 	    "bad response to read memory command: %s\n",
 	    progname, jtagmkII_get_rc(resp[0]));
     goto fail;
@@ -2482,7 +2429,7 @@ static int jtagmkII_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   int status, tries, need_progmode = 1, unsupp = 0, writesize = 1;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_write_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: jtagmkII_write_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   addr += mem->offset;
@@ -2560,7 +2507,7 @@ static int jtagmkII_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   tries = 0;
   retry:
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_write_byte(): Sending write memory command: ",
+    avrdude_message("%s: jtagmkII_write_byte(): Sending write memory command: ",
 	    progname);
   jtagmkII_send(pgm, cmd, 10 + writesize);
 
@@ -2569,14 +2516,12 @@ static int jtagmkII_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     if (verbose >= 2)
       putc('\n', stderr);
     if (verbose > 1)
-      fprintf(stderr,
-	      "%s: jtagmkII_write_byte(): "
+      avrdude_message("%s: jtagmkII_write_byte(): "
 	      "timeout/error communicating with programmer (status %d)\n",
 	      progname, status);
     if (tries++ < 3)
       goto retry;
-    fprintf(stderr,
-	    "%s: jtagmkII_write_byte(): "
+    avrdude_message("%s: jtagmkII_write_byte(): "
 	    "fatal timeout/error communicating with programmer (status %d)\n",
 	    progname, status);
     goto fail;
@@ -2585,10 +2530,9 @@ static int jtagmkII_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   if (resp[0] != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_write_byte(): "
+    avrdude_message("%s: jtagmkII_write_byte(): "
 	    "bad response to write memory command: %s\n",
 	    progname, jtagmkII_get_rc(resp[0]));
     goto fail;
@@ -2642,12 +2586,12 @@ int jtagmkII_getparm(PROGRAMMER * pgm, unsigned char parm,
   unsigned char buf[2], *resp, c;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_getparm()\n", progname);
+    avrdude_message("%s: jtagmkII_getparm()\n", progname);
 
   buf[0] = CMND_GET_PARAMETER;
   buf[1] = parm;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_getparm(): "
+    avrdude_message("%s: jtagmkII_getparm(): "
 	    "Sending get parameter command (parm 0x%02x): ",
 	    progname, parm);
   jtagmkII_send(pgm, buf, 2);
@@ -2656,8 +2600,7 @@ int jtagmkII_getparm(PROGRAMMER * pgm, unsigned char parm,
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_getparm(): "
+    avrdude_message("%s: jtagmkII_getparm(): "
 	    "timeout/error communicating with programmer (status %d)\n",
 	    progname, status);
     return -1;
@@ -2666,11 +2609,10 @@ int jtagmkII_getparm(PROGRAMMER * pgm, unsigned char parm,
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   if (c != RSP_PARAMETER) {
-    fprintf(stderr,
-	    "%s: jtagmkII_getparm(): "
+    avrdude_message("%s: jtagmkII_getparm(): "
 	    "bad response to get parameter command: %s\n",
 	    progname, jtagmkII_get_rc(c));
     free(resp);
@@ -2698,7 +2640,7 @@ static int jtagmkII_setparm(PROGRAMMER * pgm, unsigned char parm,
   size_t size;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_setparm()\n", progname);
+    avrdude_message("%s: jtagmkII_setparm()\n", progname);
 
   switch (parm) {
   case PAR_HW_VERSION: size = 2; break;
@@ -2713,7 +2655,7 @@ static int jtagmkII_setparm(PROGRAMMER * pgm, unsigned char parm,
   case PAR_PDI_OFFSET_START:
   case PAR_PDI_OFFSET_END: size = 4; break;
   default:
-    fprintf(stderr, "%s: jtagmkII_setparm(): unknown parameter 0x%02x\n",
+    avrdude_message("%s: jtagmkII_setparm(): unknown parameter 0x%02x\n",
 	    progname, parm);
     return -1;
   }
@@ -2722,7 +2664,7 @@ static int jtagmkII_setparm(PROGRAMMER * pgm, unsigned char parm,
   buf[1] = parm;
   memcpy(buf + 2, value, size);
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_setparm(): "
+    avrdude_message("%s: jtagmkII_setparm(): "
 	    "Sending set parameter command (parm 0x%02x, %u bytes): ",
 	    progname, parm, (unsigned)size);
   jtagmkII_send(pgm, buf, size + 2);
@@ -2731,8 +2673,7 @@ static int jtagmkII_setparm(PROGRAMMER * pgm, unsigned char parm,
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_setparm(): "
+    avrdude_message("%s: jtagmkII_setparm(): "
 	    "timeout/error communicating with programmer (status %d)\n",
 	    progname, status);
     return -1;
@@ -2741,12 +2682,11 @@ static int jtagmkII_setparm(PROGRAMMER * pgm, unsigned char parm,
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_setparm(): "
+    avrdude_message("%s: jtagmkII_setparm(): "
 	    "bad response to set parameter command: %s\n",
 	    progname, jtagmkII_get_rc(c));
     return -1;
@@ -2764,11 +2704,11 @@ static void jtagmkII_display(PROGRAMMER * pgm, const char * p)
       jtagmkII_getparm(pgm, PAR_FW_VERSION, fw) < 0)
     return;
 
-  fprintf(stderr, "%sM_MCU hardware version: %d\n", p, hw[0]);
-  fprintf(stderr, "%sM_MCU firmware version: %d.%02d\n", p, fw[1], fw[0]);
-  fprintf(stderr, "%sS_MCU hardware version: %d\n", p, hw[1]);
-  fprintf(stderr, "%sS_MCU firmware version: %d.%02d\n", p, fw[3], fw[2]);
-  fprintf(stderr, "%sSerial number:          %02x:%02x:%02x:%02x:%02x:%02x\n",
+  avrdude_message("%sM_MCU hardware version: %d\n", p, hw[0]);
+  avrdude_message("%sM_MCU firmware version: %d.%02d\n", p, fw[1], fw[0]);
+  avrdude_message("%sS_MCU hardware version: %d\n", p, hw[1]);
+  avrdude_message("%sS_MCU firmware version: %d.%02d\n", p, fw[3], fw[2]);
+  avrdude_message("%sSerial number:          %02x:%02x:%02x:%02x:%02x:%02x\n",
 	  p, PDATA(pgm)->serno[0], PDATA(pgm)->serno[1], PDATA(pgm)->serno[2], PDATA(pgm)->serno[3], PDATA(pgm)->serno[4], PDATA(pgm)->serno[5]);
 
   jtagmkII_print_parms1(pgm, p);
@@ -2786,7 +2726,7 @@ static void jtagmkII_print_parms1(PROGRAMMER * pgm, const char * p)
   if (jtagmkII_getparm(pgm, PAR_OCD_VTARGET, vtarget) < 0)
     return;
 
-  fprintf(stderr, "%sVtarget         : %.1f V\n", p,
+  avrdude_message("%sVtarget         : %.1f V\n", p,
 	  b2_to_u16(vtarget) / 1000.0);
 
   if ((pgm->flag & PGM_FL_IS_JTAG)) {
@@ -2806,7 +2746,7 @@ static void jtagmkII_print_parms1(PROGRAMMER * pgm, const char * p)
       sprintf(clkbuf, "%.1f kHz", 5.35e3 / (double)jtag_clock[0]);
       clk = 5.35e6 / (double)jtag_clock[0];
 
-      fprintf(stderr, "%sJTAG clock      : %s (%.1f us)\n", p, clkbuf,
+      avrdude_message("%sJTAG clock      : %s (%.1f us)\n", p, clkbuf,
 	      1.0e6 / clk);
     }
   }
@@ -2867,8 +2807,7 @@ static int jtagmkII_avr32_reset(PROGRAMMER * pgm, unsigned char val,
   int status;
   unsigned char buf[3], *resp;
 
-  if(verbose) fprintf(stderr,
-          "%s: jtagmkII_avr32_reset(%2.2x)\n",
+  if(verbose) avrdude_message("%s: jtagmkII_avr32_reset(%2.2x)\n",
           progname, val);
 
   buf[0] = CMND_GET_IR;
@@ -2878,8 +2817,7 @@ static int jtagmkII_avr32_reset(PROGRAMMER * pgm, unsigned char val,
 
   status = jtagmkII_recv(pgm, &resp);
   if (status != 2 || resp[0] != 0x87 || resp[1] != ret1) {
-    if(verbose) fprintf(stderr,
-	      "%s: jtagmkII_avr32_reset(): "
+    if(verbose) avrdude_message("%s: jtagmkII_avr32_reset(): "
 	      "Get_IR, expecting %2.2x but got %2.2x\n",
 	      progname, ret1, resp[1]);
 
@@ -2894,8 +2832,7 @@ static int jtagmkII_avr32_reset(PROGRAMMER * pgm, unsigned char val,
 
   status = jtagmkII_recv(pgm, &resp);
   if (status != 2 || resp[0] != 0x87 || resp[1] != ret2) {
-    if(verbose) fprintf(stderr,
-	      "%s: jtagmkII_avr32_reset(): "
+    if(verbose) avrdude_message("%s: jtagmkII_avr32_reset(): "
 	      "Get_XXX, expecting %2.2x but got %2.2x\n",
 	      progname, ret2, resp[1]);
     //return -1;
@@ -2911,8 +2848,7 @@ static int jtagmkII_reset32(PROGRAMMER * pgm, unsigned short flags)
   unsigned char *resp, buf[3];
   unsigned long val=0;
 
-  if(verbose) fprintf(stderr,
-          "%s: jtagmkII_reset32(%2.2x)\n",
+  if(verbose) avrdude_message("%s: jtagmkII_reset32(%2.2x)\n",
           progname, flags);
 
   status = -1;
@@ -3090,8 +3026,7 @@ static int jtagmkII_reset32(PROGRAMMER * pgm, unsigned short flags)
   return 0;
 
   eRR:
-    fprintf(stderr,
-	    "%s: jtagmkII_reset32(): "
+    avrdude_message("%s: jtagmkII_reset32(): "
 	    "failed at line %d (status=%x val=%lx)\n",
 	    progname, lineno, status, val);
     return -1;
@@ -3190,8 +3125,7 @@ static int jtagmkII_smc_init32(PROGRAMMER * pgm)
   return 0;
 
   eRR:
-    fprintf(stderr,
-	    "%s: jtagmkII_smc_init32(): "
+    avrdude_message("%s: jtagmkII_smc_init32(): "
 	    "failed at line %d\n",
 	    progname, lineno);
     return -1;
@@ -3207,7 +3141,7 @@ static int jtagmkII_initialize32(PROGRAMMER * pgm, AVRPART * p)
   unsigned char buf[6], *resp;
 
   if (jtagmkII_setparm(pgm, PAR_DAISY_CHAIN_INFO, PDATA(pgm)->jtagchain) < 0) {
-    fprintf(stderr, "%s: jtagmkII_initialize(): Failed to setup JTAG chain\n",
+    avrdude_message("%s: jtagmkII_initialize(): Failed to setup JTAG chain\n",
             progname);
     return -1;
   }
@@ -3215,12 +3149,12 @@ static int jtagmkII_initialize32(PROGRAMMER * pgm, AVRPART * p)
   free(PDATA(pgm)->flash_pagecache);
   free(PDATA(pgm)->eeprom_pagecache);
   if ((PDATA(pgm)->flash_pagecache = malloc(PDATA(pgm)->flash_pagesize)) == NULL) {
-    fprintf(stderr, "%s: jtagmkII_initialize(): Out of memory\n",
+    avrdude_message("%s: jtagmkII_initialize(): Out of memory\n",
 	    progname);
     return -1;
   }
   if ((PDATA(pgm)->eeprom_pagecache = malloc(PDATA(pgm)->eeprom_pagesize)) == NULL) {
-    fprintf(stderr, "%s: jtagmkII_initialize32(): Out of memory\n",
+    avrdude_message("%s: jtagmkII_initialize32(): Out of memory\n",
 	    progname);
     free(PDATA(pgm)->flash_pagecache);
     return -1;
@@ -3236,8 +3170,7 @@ static int jtagmkII_initialize32(PROGRAMMER * pgm, AVRPART * p)
     if(status <= 0 || resp[0] != 0x87) {
       if (verbose >= 2)
         putc('\n', stderr);
-      fprintf(stderr,
-                "%s: jtagmkII_initialize32(): "
+      avrdude_message("%s: jtagmkII_initialize32(): "
                 "timeout/error communicating with programmer (status %d)\n",
                 progname, status);
       return -1;
@@ -3253,8 +3186,7 @@ static int jtagmkII_initialize32(PROGRAMMER * pgm, AVRPART * p)
     if(status <= 0 || resp[0] != 0x87) {
       if (verbose >= 2)
         putc('\n', stderr);
-      fprintf(stderr,
-                "%s: jtagmkII_initialize32(): "
+      avrdude_message("%s: jtagmkII_initialize32(): "
                 "timeout/error communicating with programmer (status %d)\n",
                 progname, status);
       return -1;
@@ -3264,12 +3196,11 @@ static int jtagmkII_initialize32(PROGRAMMER * pgm, AVRPART * p)
     resp[2] != p->signature[0] ||
     resp[3] != p->signature[1] ||
     resp[4] != p->signature[2]) {
-      fprintf(stderr,
-          "%s: Expected signature for %s is %02X %02X %02X\n",
+      avrdude_message("%s: Expected signature for %s is %02X %02X %02X\n",
           progname, p->desc,
           p->signature[0], p->signature[1], p->signature[2]);
       if (!ovsigck) {
-        fprintf(stderr, "%sDouble check chip, "
+        avrdude_message("%sDouble check chip, "
         "or use -F to override this check.\n",
                 progbuf);
         return -1;
@@ -3288,8 +3219,7 @@ static int jtagmkII_chip_erase32(PROGRAMMER * pgm, AVRPART * p)
   unsigned long val=0;
   unsigned int lineno;
 
-  if(verbose) fprintf(stderr,
-          "%s: jtagmkII_chip_erase32()\n",
+  if(verbose) avrdude_message("%s: jtagmkII_chip_erase32()\n",
           progname);
 
   status = jtagmkII_reset32(pgm, AVR32_RESET_CHIP_ERASE);
@@ -3337,8 +3267,7 @@ static int jtagmkII_chip_erase32(PROGRAMMER * pgm, AVRPART * p)
   return 0;
 
   eRR:
-    fprintf(stderr,
-	    "%s: jtagmkII_reset32(): "
+    avrdude_message("%s: jtagmkII_reset32(): "
 	    "failed at line %d (status=%x val=%lx)\n",
 	    progname, lineno, status, val);
     return -1;
@@ -3365,20 +3294,19 @@ static unsigned long jtagmkII_read_SABaddr(PROGRAMMER * pgm, unsigned long addr,
   if(status <= 0 || resp[0] != 0x87) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	      "%s: jtagmkII_read_SABaddr(): "
+    avrdude_message("%s: jtagmkII_read_SABaddr(): "
 	      "timeout/error communicating with programmer (status %d) resp=%x\n",
 	      progname, status, resp[0]);
     serial_recv_timeout = otimeout;
 
     if(status > 0) {
       int i;
-      fprintf(stderr, "Cmd: ");
-      for(i=0; i<6; ++i) fprintf(stderr, "%2.2x ", buf[i]);
-      fprintf(stderr, "\n");
-      fprintf(stderr, "Data: ");
-      for(i=0; i<status; ++i) fprintf(stderr, "%2.2x ", resp[i]);
-      fprintf(stderr, "\n");
+      avrdude_message("Cmd: ");
+      for(i=0; i<6; ++i) avrdude_message("%2.2x ", buf[i]);
+      avrdude_message("\n");
+      avrdude_message("Data: ");
+      for(i=0; i<status; ++i) avrdude_message("%2.2x ", resp[i]);
+      avrdude_message("\n");
     }
     return ERROR_SAB;
   }
@@ -3386,8 +3314,7 @@ static unsigned long jtagmkII_read_SABaddr(PROGRAMMER * pgm, unsigned long addr,
   if(status != 5) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	      "%s: jtagmkII_read_SABaddr(): "
+    avrdude_message("%s: jtagmkII_read_SABaddr(): "
 	      "wrong number of bytes (status %d)\n",
 	      progname, status);
     serial_recv_timeout = otimeout;
@@ -3400,8 +3327,7 @@ static unsigned long jtagmkII_read_SABaddr(PROGRAMMER * pgm, unsigned long addr,
   if (verbose) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	      "%s: jtagmkII_read_SABaddr(): "
+    avrdude_message("%s: jtagmkII_read_SABaddr(): "
 	      "OCD Register %lx -> %4.4lx\n",
 	      progname, addr, val);
   }
@@ -3427,8 +3353,7 @@ static int jtagmkII_write_SABaddr(PROGRAMMER * pgm, unsigned long addr,
   if(status <= 0 || resp[0] != RSP_OK) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	      "%s: jtagmkII_write_SABaddr(): "
+    avrdude_message("%s: jtagmkII_write_SABaddr(): "
 	      "timeout/error communicating with programmer (status %d)\n",
 	      progname, status);
     return -1;
@@ -3438,8 +3363,7 @@ static int jtagmkII_write_SABaddr(PROGRAMMER * pgm, unsigned long addr,
   if (verbose) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	      "%s: jtagmkII_write_SABaddr(): "
+    avrdude_message("%s: jtagmkII_write_SABaddr(): "
 	      "OCD Register %lx -> %4.4lx\n",
 	      progname, addr, val);
   }
@@ -3453,7 +3377,7 @@ static int jtagmkII_open32(PROGRAMMER * pgm, char * port)
   union pinfo pinfo;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_open32()\n", progname);
+    avrdude_message("%s: jtagmkII_open32()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -3480,7 +3404,7 @@ static int jtagmkII_open32(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -3534,7 +3458,7 @@ static void jtagmkII_close32(PROGRAMMER * pgm)
   unsigned long val=0;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_close32()\n", progname);
+    avrdude_message("%s: jtagmkII_close32()\n", progname);
 
   // AVR32 "special"
   buf[0] = CMND_SET_PARAMETER;
@@ -3547,7 +3471,7 @@ static void jtagmkII_close32(PROGRAMMER * pgm)
 
   buf[0] = CMND_SIGN_OFF;
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_close(): Sending sign-off command: ",
+    avrdude_message("%s: jtagmkII_close(): Sending sign-off command: ",
 	    progname);
   jtagmkII_send(pgm, buf, 1);
 
@@ -3555,8 +3479,7 @@ static void jtagmkII_close32(PROGRAMMER * pgm)
   if (status <= 0) {
     if (verbose >= 2)
       putc('\n', stderr);
-    fprintf(stderr,
-	    "%s: jtagmkII_close(): "
+    avrdude_message("%s: jtagmkII_close(): "
 	    "timeout/error communicating with programmer (status %d)\n",
 	    progname, status);
     return;
@@ -3565,12 +3488,11 @@ static void jtagmkII_close32(PROGRAMMER * pgm)
     putc('\n', stderr);
     jtagmkII_prmsg(pgm, resp, status);
   } else if (verbose == 2)
-    fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+    avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
   c = resp[0];
   free(resp);
   if (c != RSP_OK) {
-    fprintf(stderr,
-	    "%s: jtagmkII_close(): "
+    avrdude_message("%s: jtagmkII_close(): "
 	    "bad response to sign-off command: %s\n",
 	    progname, jtagmkII_get_rc(c));
   }
@@ -3581,8 +3503,7 @@ static void jtagmkII_close32(PROGRAMMER * pgm)
     return;
 
   eRR:
-    fprintf(stderr,
-	    "%s: jtagmkII_reset32(): "
+    avrdude_message("%s: jtagmkII_reset32(): "
 	    "failed at line %d (status=%x val=%lx)\n",
 	    progname, lineno, status, val);
     goto ret;
@@ -3601,7 +3522,7 @@ static int jtagmkII_paged_load32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   long otimeout = serial_recv_timeout;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: jtagmkII_paged_load32(.., %s, %d, %d)\n",
+    avrdude_message("%s: jtagmkII_paged_load32(.., %s, %d, %d)\n",
 	    progname, m->desc, page_size, n_bytes);
 
   serial_recv_timeout = 256;
@@ -3625,7 +3546,7 @@ static int jtagmkII_paged_load32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     p->flags |= AVRPART_INIT_SMC;
   }
 
-  //fprintf(stderr, "\n pageSize=%d bytes=%d pages=%d m->offset=0x%x pgm->page_size %d\n",
+  //avrdude_message("\n pageSize=%d bytes=%d pages=%d m->offset=0x%x pgm->page_size %d\n",
   //        page_size, n_bytes, pages, m->offset, pgm->page_size);
 
   cmd[0] = CMND_READ_MEMORY32;
@@ -3635,7 +3556,7 @@ static int jtagmkII_paged_load32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   for (; addr < maxaddr; addr += block_size) {
     block_size = ((maxaddr-addr) < pgm->page_size) ? (maxaddr - addr) : pgm->page_size;
     if (verbose >= 3)
-      fprintf(stderr, "%s: jtagmkII_paged_load32(): "
+      avrdude_message("%s: jtagmkII_paged_load32(): "
               "block_size at addr %d is %d\n",
               progname, addr, block_size);
 
@@ -3650,10 +3571,9 @@ static int jtagmkII_paged_load32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       putc('\n', stderr);
       jtagmkII_prmsg(pgm, resp, status);
     } else if (verbose == 2)
-      fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+      avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
     if (resp[0] != 0x87) {
-      fprintf(stderr,
-              "%s: jtagmkII_paged_load32(): "
+      avrdude_message("%s: jtagmkII_paged_load32(): "
               "bad response to write memory command: %s\n",
               progname, jtagmkII_get_rc(resp[0]));
       free(resp);
@@ -3673,8 +3593,7 @@ static int jtagmkII_paged_load32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
   eRR:
     serial_recv_timeout = otimeout;
-    fprintf(stderr,
-	    "%s: jtagmkII_paged_load32(): "
+    avrdude_message("%s: jtagmkII_paged_load32(): "
 	    "failed at line %d (status=%x val=%lx)\n",
 	    progname, lineno, status, val);
     return -1;
@@ -3702,12 +3621,12 @@ static int jtagmkII_paged_write32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
   pages = (n_bytes - addr - 1)/page_size + 1;
   sPageNum = addr/page_size;
-  //fprintf(stderr, "\n pageSize=%d bytes=%d pages=%d m->offset=0x%x pgm->page_size %d\n",
+  //avrdude_message("\n pageSize=%d bytes=%d pages=%d m->offset=0x%x pgm->page_size %d\n",
   //        page_size, n_bytes, pages, m->offset, pgm->page_size);
 
   // Before any errors can happen
   if ((cmd = malloc(pgm->page_size + 10)) == NULL) {
-    fprintf(stderr, "%s: jtagmkII_paged_write32(): Out of memory\n", progname);
+    avrdude_message("%s: jtagmkII_paged_write32(): Out of memory\n", progname);
     return -1;
   }
 
@@ -3742,7 +3661,7 @@ static int jtagmkII_paged_write32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     for(blocks=0; blocks<2; ++blocks) {
       block_size = ((maxaddr-addr) < pgm->page_size) ? (maxaddr - addr) : pgm->page_size;
       if (verbose >= 3)
-        fprintf(stderr, "%s: jtagmkII_paged_write32(): "
+        avrdude_message("%s: jtagmkII_paged_write32(): "
                 "block_size at addr %d is %d\n",
                 progname, addr, block_size);
 
@@ -3759,10 +3678,9 @@ static int jtagmkII_paged_write32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
         putc('\n', stderr);
         jtagmkII_prmsg(pgm, resp, status);
       } else if (verbose == 2)
-        fprintf(stderr, "0x%02x (%d bytes msg)\n", resp[0], status);
+        avrdude_message("0x%02x (%d bytes msg)\n", resp[0], status);
       if (resp[0] != RSP_OK) {
-        fprintf(stderr,
-                "%s: jtagmkII_paged_write32(): "
+        avrdude_message("%s: jtagmkII_paged_write32(): "
                 "bad response to write memory command: %s\n",
                 progname, jtagmkII_get_rc(resp[0]));
         free(resp);
@@ -3789,8 +3707,7 @@ static int jtagmkII_paged_write32(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   eRR:
     serial_recv_timeout = otimeout;
     free(cmd);
-    fprintf(stderr,
-	    "%s: jtagmkII_paged_write32(): "
+    avrdude_message("%s: jtagmkII_paged_write32(): "
 	    "failed at line %d (status=%x val=%lx)\n",
 	    progname, lineno, status, val);
     return -1;
@@ -3818,8 +3735,7 @@ static int jtagmkII_flash_lock32(PROGRAMMER * pgm, unsigned char lock, unsigned
   return 0;
 
   eRR:
-    fprintf(stderr,
-	    "%s: jtagmkII_flash_lock32(): "
+    avrdude_message("%s: jtagmkII_flash_lock32(): "
 	    "failed at line %d page %d cmd %8.8lx\n",
 	    progname, lineno, page, cmd);
     return -1;
@@ -3843,7 +3759,7 @@ static int jtagmkII_flash_erase32(PROGRAMMER * pgm, unsigned int page)
   status = jtagmkII_write_SABaddr(pgm, AVR32_FLASHC_FCMD, 0x05, cmd);
   if (status < 0) {lineno = __LINE__; goto eRR;}
 
-//fprintf(stderr, "ERASE %x -> %x\n", cmd, AVR32_FLASHC_FCMD);
+//avrdude_message("ERASE %x -> %x\n", cmd, AVR32_FLASHC_FCMD);
 
   err = 0;
   for(i=0; i<256; ++i) {
@@ -3859,8 +3775,7 @@ static int jtagmkII_flash_erase32(PROGRAMMER * pgm, unsigned int page)
   return 0;
 
   eRR:
-    fprintf(stderr,
-	    "%s: jtagmkII_flash_erase32(): "
+    avrdude_message("%s: jtagmkII_flash_erase32(): "
 	    "failed at line %d page %d cmd %8.8lx val %lx\n",
 	    progname, lineno, page, cmd, val);
     return -1;
@@ -3890,8 +3805,7 @@ static int jtagmkII_flash_write_page32(PROGRAMMER * pgm, unsigned int page)
   return 0;
 
   eRR:
-    fprintf(stderr,
-	    "%s: jtagmkII_flash_write_page32(): "
+    avrdude_message("%s: jtagmkII_flash_write_page32(): "
 	    "failed at line %d page %d cmd %8.8lx val %lx\n",
 	    progname, lineno, page, cmd, val);
     return -1;
@@ -3920,8 +3834,7 @@ static int jtagmkII_flash_clear_pagebuffer32(PROGRAMMER * pgm)
   return 0;
 
   eRR:
-    fprintf(stderr,
-	    "%s: jtagmkII_flash_clear_pagebuffer32(): "
+    avrdude_message("%s: jtagmkII_flash_clear_pagebuffer32(): "
 	    "failed at line %d cmd %8.8lx val %lx\n",
 	    progname, lineno, cmd, val);
     return -1;
diff --git a/lexer.l b/lexer.l
index 9079739f..23d7a090 100644
--- a/lexer.l
+++ b/lexer.l
@@ -95,9 +95,9 @@ SIGN     [+-]
           }
           
           if (c == EOF) {
-            fprintf(stderr, "error at %s:%d: EOF in comment\n", 
+            avrdude_message("error at %s:%d: EOF in comment\n", 
                     infile, lineno);
-            fprintf(stderr, "    comment started on line %d\n", 
+            avrdude_message("    comment started on line %d\n", 
                     comment_start);
             exit(1);
             break;
@@ -116,7 +116,7 @@ SIGN     [+-]
 <strng>\\(.|\n)  *(string_buf_ptr++) = yytext[1];
 <strng>[^\\\n\"]+ { char *yptr = yytext; while (*yptr) 
                                          *(string_buf_ptr++) = *(yptr++); }
-<strng>\n { fprintf(stderr, "error at line %d: unterminated character constant\n",
+<strng>\n { avrdude_message("error at line %d: unterminated character constant\n",
             lineno); 
             exit(1); }
 
@@ -255,9 +255,9 @@ yes              { yylval=new_token(K_YES); return K_YES; }
 "\n"      { lineno++; }
 [ \r\t]+  { /* ignore whitespace */ }
 
-c: { fprintf(stderr, "error at %s:%d: possible old-style config file entry\n",
+c: { avrdude_message("error at %s:%d: possible old-style config file entry\n",
              infile, lineno);
-     fprintf(stderr, "  Update your config file (see %s%s for a sample)\n",
+     avrdude_message("  Update your config file (see %s%s for a sample)\n",
              CONFIG_DIR, "/avrdude.conf.sample");
      return YYERRCODE; }
 
diff --git a/linux_ppdev.h b/linux_ppdev.h
index 42ff747a..0379974d 100644
--- a/linux_ppdev.h
+++ b/linux_ppdev.h
@@ -33,7 +33,7 @@
 
 #define ppi_claim(fd)                                        \
   if (ioctl(fd, PPCLAIM)) {                                  \
-    fprintf(stderr, "%s: can't claim device \"%s\": %s\n\n", \
+    avrdude_message("%s: can't claim device \"%s\": %s\n\n", \
             progname, port, strerror(errno));                \
     close(fd);                                               \
     exit(1);                                                 \
@@ -41,7 +41,7 @@
 
 #define ppi_release(fd)                                      \
   if (ioctl(fd, PPRELEASE)) {                                \
-    fprintf(stderr, "%s: can't release device: %s\n\n",      \
+    avrdude_message("%s: can't release device: %s\n\n",      \
             progname, strerror(errno));                      \
     exit(1);                                                 \
   }
diff --git a/linuxgpio.c b/linuxgpio.c
index 5138713b..673346c9 100644
--- a/linuxgpio.c
+++ b/linuxgpio.c
@@ -219,7 +219,7 @@ static int linuxgpio_highpulsepin(PROGRAMMER * pgm, int pinfunc)
 
 static void linuxgpio_display(PROGRAMMER *pgm, const char *p)
 {
-    fprintf(stderr, "%sPin assignment  : /sys/class/gpio/gpio{n}\n",p);
+    avrdude_message("%sPin assignment  : /sys/class/gpio/gpio{n}\n",p);
     pgm_display_generic_mask(pgm, p, SHOW_AVR_PINS);
 }
 
@@ -269,7 +269,7 @@ static int linuxgpio_open(PROGRAMMER *pgm, char *port)
          i == PIN_AVR_MISO ) {
         pin = pgm->pinno[i] & PIN_MASK;
         if ((r=linuxgpio_export(pin)) < 0) {
-            fprintf(stderr, "Can't export GPIO %d, already exported/busy?: %s",
+            avrdude_message("Can't export GPIO %d, already exported/busy?: %s",
                     pin, strerror(errno));
             return r;
         }
@@ -346,9 +346,8 @@ const char linuxgpio_desc[] = "GPIO bitbanging using the Linux sysfs interface";
 
 void linuxgpio_initpgm(PROGRAMMER * pgm)
 {
-  fprintf(stderr,
-	  "%s: Linux sysfs GPIO support not available in this configuration\n",
-	  progname);
+  avrdude_message("%s: Linux sysfs GPIO support not available in this configuration\n",
+                  progname);
 }
 
 const char linuxgpio_desc[] = "GPIO bitbanging using the Linux sysfs interface (not available)";
diff --git a/main.c b/main.c
index cedf4e34..671a9198 100644
--- a/main.c
+++ b/main.c
@@ -33,6 +33,7 @@
 
 #include <stdio.h>
 #include <stdlib.h>
+#include <stdarg.h>
 #include <errno.h>
 #include <fcntl.h>
 #include <limits.h>
@@ -65,12 +66,21 @@ char   progbuf[PATH_MAX]; /* temporary buffer of spaces the same
                              length as progname; used for lining up
                              multiline messages */
 
-int yyerror(char * errmsg)
+int avrdude_message(const char *format, ...)
 {
-  fprintf(stderr, "%s: %s at %s:%d\n", progname, errmsg, infile, lineno);
-  exit(1);
+    int rc;
+    va_list ap;
+    va_start(ap, format);
+    rc = vfprintf(stderr, format, ap);
+    va_end(ap);
+    return rc;
 }
 
+int yyerror(char * errmsg)
+{
+  avrdude_message("%s: %s at %s:%d\n", progname, errmsg, infile, lineno);
+  exit(1);
+}
 
 struct list_walk_cookie
 {
@@ -94,12 +104,14 @@ int    quell_progress; /* un-verebose output */
 int    ovsigck;     /* 1=override sig check, 0=don't */
 
 
+
+
 /*
  * usage message
  */
 static void usage(void)
 {
-  fprintf(stderr,
+  avrdude_message(
  "Usage: %s [options]\n"
  "Options:\n"
  "  -p <partno>                Required. Specify AVR device.\n"
@@ -153,18 +165,18 @@ static void update_progress_tty (int percent, double etime, char *hdr)
   }
 
   if (hdr) {
-    fprintf (stderr, "\n");
+    avrdude_message("\n");
     last = 0;
     header = hdr;
   }
 
   if (last == 0) {
-    fprintf(stderr, "\r%s | %s | %d%% %0.2fs", 
+    avrdude_message("\r%s | %s | %d%% %0.2fs",
             header, hashes, percent, etime);
   }
 
   if (percent == 100) {
-    if (!last) fprintf (stderr, "\n\n");
+    if (!last) avrdude_message("\n\n");
     last = 1;
   }
 
@@ -180,19 +192,19 @@ static void update_progress_no_tty (int percent, double etime, char *hdr)
   setvbuf(stderr, (char*)NULL, _IONBF, 0);
 
   if (hdr) {
-    fprintf (stderr, "\n%s | ", hdr);
+    avrdude_message("\n%s | ", hdr);
     last = 0;
     done = 0;
   }
   else {
     while ((cnt > last) && (done == 0)) {
-      fprintf (stderr, "#");
+      avrdude_message("#");
       cnt -=  2;
     }
   }
 
   if ((percent == 100) && (done == 0)) {
-    fprintf (stderr, " | 100%% %0.2fs\n\n", etime);
+    avrdude_message(" | 100%% %0.2fs\n\n", etime);
     last = 0;
     done = 1;
   }
@@ -381,19 +393,19 @@ int main(int argc, char * argv [])
 
   updates = lcreat(NULL, 0);
   if (updates == NULL) {
-    fprintf(stderr, "%s: cannot initialize updater list\n", progname);
+    avrdude_message("%s: cannot initialize updater list\n", progname);
     exit(1);
   }
 
   extended_params = lcreat(NULL, 0);
   if (extended_params == NULL) {
-    fprintf(stderr, "%s: cannot initialize extended parameter list\n", progname);
+    avrdude_message("%s: cannot initialize extended parameter list\n", progname);
     exit(1);
   }
 
   additional_config_files = lcreat(NULL, 0);
   if (additional_config_files == NULL) {
-    fprintf(stderr, "%s: cannot initialize additional config files list\n", progname);
+    avrdude_message("%s: cannot initialize additional config files list\n", progname);
     exit(1);
   }
 
@@ -466,7 +478,7 @@ int main(int argc, char * argv [])
       case 'b': /* override default programmer baud rate */
         baudrate = strtol(optarg, &e, 0);
         if ((e == optarg) || (*e != 0)) {
-          fprintf(stderr, "%s: invalid baud rate specified '%s'\n",
+          avrdude_message("%s: invalid baud rate specified '%s'\n",
                   progname, optarg);
           exit(1);
         }
@@ -475,7 +487,7 @@ int main(int argc, char * argv [])
       case 'B':	/* specify JTAG ICE bit clock period */
 	bitclock = strtod(optarg, &e);
 	if ((e == optarg) || (*e != 0) || bitclock == 0.0) {
-	  fprintf(stderr, "%s: invalid bit clock period specified '%s'\n",
+	  avrdude_message("%s: invalid bit clock period specified '%s'\n",
                   progname, optarg);
           exit(1);
         }
@@ -484,7 +496,7 @@ int main(int argc, char * argv [])
       case 'i':	/* specify isp clock delay */
 	ispdelay = strtol(optarg, &e,10);
 	if ((e == optarg) || (*e != 0) || ispdelay == 0) {
-	  fprintf(stderr, "%s: invalid isp clock delay specified '%s'\n",
+	  avrdude_message("%s: invalid isp clock delay specified '%s'\n",
                   progname, optarg);
           exit(1);
         }
@@ -560,7 +572,7 @@ int main(int argc, char * argv [])
       case 'U':
         upd = parse_op(optarg);
         if (upd == NULL) {
-          fprintf(stderr, "%s: error parsing update operation '%s'\n",
+          avrdude_message("%s: error parsing update operation '%s'\n",
                   progname, optarg);
           exit(1);
         }
@@ -586,12 +598,12 @@ int main(int argc, char * argv [])
         break;
 
       case 'y':
-        fprintf(stderr, "%s: erase cycle counter no longer supported\n",
+        avrdude_message("%s: erase cycle counter no longer supported\n",
                 progname);
         break;
 
       case 'Y':
-        fprintf(stderr, "%s: erase cycle counter no longer supported\n",
+        avrdude_message("%s: erase cycle counter no longer supported\n",
                 progname);
         break;
 
@@ -601,7 +613,7 @@ int main(int argc, char * argv [])
         break;
 
       default:
-        fprintf(stderr, "%s: invalid option -%c\n\n", progname, ch);
+        avrdude_message("%s: invalid option -%c\n\n", progname, ch);
         usage();
         exit(1);
         break;
@@ -637,45 +649,42 @@ int main(int argc, char * argv [])
      * Print out an identifying string so folks can tell what version
      * they are running
      */
-    fprintf(stderr,
-            "\n%s: Version %s, compiled on %s at %s\n"
-            "%sCopyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/\n"
-	    "%sCopyright (c) 2007-2014 Joerg Wunsch\n\n",
-            progname, version, __DATE__, __TIME__, progbuf, progbuf);
+    avrdude_message("\n%s: Version %s, compiled on %s at %s\n"
+                    "%sCopyright (c) 2000-2005 Brian Dean, http://www.bdmicro.com/\n"
+                    "%sCopyright (c) 2007-2014 Joerg Wunsch\n\n",
+                    progname, version, __DATE__, __TIME__, progbuf, progbuf);
   }
 
   if (verbose) {
-    fprintf(stderr, "%sSystem wide configuration file is \"%s\"\n",
+    avrdude_message("%sSystem wide configuration file is \"%s\"\n",
             progbuf, sys_config);
   }
 
   rc = read_config(sys_config);
   if (rc) {
-    fprintf(stderr,
-            "%s: error reading system wide configuration file \"%s\"\n",
-            progname, sys_config);
+    avrdude_message("%s: error reading system wide configuration file \"%s\"\n",
+                    progname, sys_config);
     exit(1);
   }
 
   if (usr_config[0] != 0) {
     if (verbose) {
-      fprintf(stderr, "%sUser configuration file is \"%s\"\n",
+      avrdude_message("%sUser configuration file is \"%s\"\n",
               progbuf, usr_config);
     }
 
     rc = stat(usr_config, &sb);
     if ((rc < 0) || ((sb.st_mode & S_IFREG) == 0)) {
       if (verbose) {
-        fprintf(stderr,
-                "%sUser configuration file does not exist or is not a "
-                "regular file, skipping\n",
-                progbuf);
+        avrdude_message("%sUser configuration file does not exist or is not a "
+                        "regular file, skipping\n",
+                        progbuf);
       }
     }
     else {
       rc = read_config(usr_config);
       if (rc) {
-        fprintf(stderr, "%s: error reading user configuration file \"%s\"\n",
+        avrdude_message("%s: error reading user configuration file \"%s\"\n",
                 progname, usr_config);
         exit(1);
       }
@@ -689,15 +698,14 @@ int main(int argc, char * argv [])
     for (ln1=lfirst(additional_config_files); ln1; ln1=lnext(ln1)) {
       p = ldata(ln1);
       if (verbose) {
-        fprintf(stderr, "%sAdditional configuration file is \"%s\"\n",
+        avrdude_message("%sAdditional configuration file is \"%s\"\n",
                 progbuf, p);
       }
 
       rc = read_config(p);
       if (rc) {
-        fprintf(stderr,
-                "%s: error reading additional configuration file \"%s\"\n",
-                progname, p);
+        avrdude_message("%s: error reading additional configuration file \"%s\"\n",
+                        progname, p);
         exit(1);
       }
     }
@@ -709,66 +717,62 @@ int main(int argc, char * argv [])
   }
 
   if (verbose) {
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
   }
 
   if (partdesc) {
     if (strcmp(partdesc, "?") == 0) {
-      fprintf(stderr, "\n");
-      fprintf(stderr,"Valid parts are:\n");
+      avrdude_message("\n");
+      avrdude_message("Valid parts are:\n");
       list_parts(stderr, "  ", part_list);
-      fprintf(stderr, "\n");
+      avrdude_message("\n");
       exit(1);
     }
   }
 
   if (programmer) {
     if (strcmp(programmer, "?") == 0) {
-      fprintf(stderr, "\n");
-      fprintf(stderr,"Valid programmers are:\n");
+      avrdude_message("\n");
+      avrdude_message("Valid programmers are:\n");
       list_programmers(stderr, "  ", programmers);
-      fprintf(stderr,"\n");
+      avrdude_message("\n");
       exit(1);
     }
     if (strcmp(programmer, "?type") == 0) {
-      fprintf(stderr, "\n");
-      fprintf(stderr,"Valid programmer types are:\n");
+      avrdude_message("\n");
+      avrdude_message("Valid programmer types are:\n");
       list_programmer_types(stderr, "  ");
-      fprintf(stderr,"\n");
+      avrdude_message("\n");
       exit(1);
     }
   }
 
 
   if (programmer[0] == 0) {
-    fprintf(stderr,
-            "\n%s: no programmer has been specified on the command line "
-            "or the config file\n",
-            progname);
-    fprintf(stderr,
-            "%sSpecify a programmer using the -c option and try again\n\n",
-            progbuf);
+    avrdude_message("\n%s: no programmer has been specified on the command line "
+                    "or the config file\n",
+                    progname);
+    avrdude_message("%sSpecify a programmer using the -c option and try again\n\n",
+                    progbuf);
     exit(1);
   }
 
   pgm = locate_programmer(programmers, programmer);
   if (pgm == NULL) {
-    fprintf(stderr,"\n");
-    fprintf(stderr,
-            "%s: Can't find programmer id \"%s\"\n",
-            progname, programmer);
-    fprintf(stderr,"\nValid programmers are:\n");
+    avrdude_message("\n");
+    avrdude_message("%s: Can't find programmer id \"%s\"\n",
+                    progname, programmer);
+    avrdude_message("\nValid programmers are:\n");
     list_programmers(stderr, "  ", programmers);
-    fprintf(stderr,"\n");
+    avrdude_message("\n");
     exit(1);
   }
 
   if (pgm->initpgm) {
     pgm->initpgm(pgm);
   } else {
-    fprintf(stderr,
-            "\n%s: Can't initialize the programmer.\n\n",
-            progname);
+    avrdude_message("\n%s: Can't initialize the programmer.\n\n",
+                    progname);
     exit(1);
   }
 
@@ -781,15 +785,13 @@ int main(int argc, char * argv [])
 
   if (lsize(extended_params) > 0) {
     if (pgm->parseextparams == NULL) {
-      fprintf(stderr,
-              "%s: WARNING: Programmer doesn't support extended parameters,"
-              " -x option(s) ignored\n",
-              progname);
+      avrdude_message("%s: WARNING: Programmer doesn't support extended parameters,"
+                      " -x option(s) ignored\n",
+                      progname);
     } else {
       if (pgm->parseextparams(pgm, extended_params) < 0) {
-        fprintf(stderr,
-              "%s: Error parsing extended parameter list\n",
-              progname);
+        avrdude_message("%s: Error parsing extended parameter list\n",
+                        progname);
         exit(1);
       }
     }
@@ -813,33 +815,30 @@ int main(int argc, char * argv [])
   }
 
   if (partdesc == NULL) {
-    fprintf(stderr,
-            "%s: No AVR part has been specified, use \"-p Part\"\n\n",
-            progname);
-    fprintf(stderr,"Valid parts are:\n");
+    avrdude_message("%s: No AVR part has been specified, use \"-p Part\"\n\n",
+                    progname);
+    avrdude_message("Valid parts are:\n");
     list_parts(stderr, "  ", part_list);
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
     exit(1);
   }
 
 
   p = locate_part(part_list, partdesc);
   if (p == NULL) {
-    fprintf(stderr,
-            "%s: AVR Part \"%s\" not found.\n\n",
-            progname, partdesc);
-    fprintf(stderr,"Valid parts are:\n");
+    avrdude_message("%s: AVR Part \"%s\" not found.\n\n",
+                    progname, partdesc);
+    avrdude_message("Valid parts are:\n");
     list_parts(stderr, "  ", part_list);
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
     exit(1);
   }
 
 
   if (exitspecs != NULL) {
     if (pgm->parseexitspecs == NULL) {
-      fprintf(stderr,
-              "%s: WARNING: -E option not supported by this programmer type\n",
-              progname);
+      avrdude_message("%s: WARNING: -E option not supported by this programmer type\n",
+                      progname);
       exitspecs = NULL;
     }
     else if (pgm->parseexitspecs(pgm, exitspecs) < 0) {
@@ -873,7 +872,7 @@ int main(int argc, char * argv [])
 
   if (avr_initmem(p) != 0)
   {
-    fprintf(stderr, "\n%s: failed to initialize memories\n",
+    avrdude_message("\n%s: failed to initialize memories\n",
             progname);
     exit(1);
   }
@@ -889,14 +888,13 @@ int main(int argc, char * argv [])
     if (upd->memtype == NULL) {
       const char *mtype = (p->flags & AVRPART_HAS_PDI)? "application": "flash";
       if (verbose >= 2) {
-        fprintf(stderr,
-                "%s: defaulting memtype in -U %c:%s option to \"%s\"\n",
-                progname,
-                (upd->op == DEVICE_READ)? 'r': (upd->op == DEVICE_WRITE)? 'w': 'v',
-                upd->filename, mtype);
+        avrdude_message("%s: defaulting memtype in -U %c:%s option to \"%s\"\n",
+                        progname,
+                        (upd->op == DEVICE_READ)? 'r': (upd->op == DEVICE_WRITE)? 'w': 'v',
+                        upd->filename, mtype);
       }
       if ((upd->memtype = strdup(mtype)) == NULL) {
-        fprintf(stderr, "%s: out of memory\n", progname);
+        avrdude_message("%s: out of memory\n", progname);
         exit(1);
       }
     }
@@ -906,41 +904,41 @@ int main(int argc, char * argv [])
    * open the programmer
    */
   if (port[0] == 0) {
-    fprintf(stderr, "\n%s: no port has been specified on the command line "
+    avrdude_message("\n%s: no port has been specified on the command line "
             "or the config file\n",
             progname);
-    fprintf(stderr, "%sSpecify a port using the -P option and try again\n\n",
+    avrdude_message("%sSpecify a port using the -P option and try again\n\n",
             progbuf);
     exit(1);
   }
 
   if (verbose) {
-    fprintf(stderr, "%sUsing Port                    : %s\n", progbuf, port);
-    fprintf(stderr, "%sUsing Programmer              : %s\n", progbuf, programmer);
+    avrdude_message("%sUsing Port                    : %s\n", progbuf, port);
+    avrdude_message("%sUsing Programmer              : %s\n", progbuf, programmer);
     if ((strcmp(pgm->type, "avr910") == 0)) {
-	  fprintf(stderr, "%savr910_devcode (avrdude.conf) : ", progbuf);
-      if(p->avr910_devcode)fprintf(stderr, "0x%x\n", p->avr910_devcode);
-	  else fprintf(stderr, "none\n");
-    }  
+	  avrdude_message("%savr910_devcode (avrdude.conf) : ", progbuf);
+      if(p->avr910_devcode)avrdude_message("0x%x\n", p->avr910_devcode);
+	  else avrdude_message("none\n");
+    }
   }
 
   if (baudrate != 0) {
     if (verbose) {
-      fprintf(stderr, "%sOverriding Baud Rate          : %d\n", progbuf, baudrate);
+      avrdude_message("%sOverriding Baud Rate          : %d\n", progbuf, baudrate);
     }
     pgm->baudrate = baudrate;
   }
 
   if (bitclock != 0.0) {
     if (verbose) {
-      fprintf(stderr, "%sSetting bit clk period        : %.1f\n", progbuf, bitclock);
+      avrdude_message("%sSetting bit clk period        : %.1f\n", progbuf, bitclock);
     }
     pgm->bitclock = bitclock * 1e-6;
   }
 
   if (ispdelay != 0) {
     if (verbose) {
-      fprintf(stderr, "%sSetting isp clock delay        : %3i\n", progbuf, ispdelay);
+      avrdude_message("%sSetting isp clock delay        : %3i\n", progbuf, ispdelay);
     }
     pgm->ispdelay = ispdelay;
   }
@@ -959,30 +957,28 @@ int main(int argc, char * argv [])
      * as outlined in appnote AVR053
      */
     if (pgm->perform_osccal == 0) {
-      fprintf(stderr,
-              "%s: programmer does not support RC oscillator calibration\n",
-	      progname);
+      avrdude_message("%s: programmer does not support RC oscillator calibration\n",
+                      progname);
       exitrc = 1;
     } else {
-      fprintf(stderr, "%s: performing RC oscillator calibration\n", progname);
+      avrdude_message("%s: performing RC oscillator calibration\n", progname);
       exitrc = pgm->perform_osccal(pgm);
     }
     if (exitrc == 0 && quell_progress < 2) {
-      fprintf(stderr,
-              "%s: calibration value is now stored in EEPROM at address 0\n",
-              progname);
+      avrdude_message("%s: calibration value is now stored in EEPROM at address 0\n",
+                      progname);
     }
     goto main_exit;
   }
 
   if (verbose) {
     avr_display(stderr, p, progbuf, verbose);
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
     programmer_display(pgm, progbuf);
   }
 
   if (quell_progress < 2) {
-    fprintf(stderr, "\n");
+    avrdude_message("\n");
   }
 
   exitrc = 0;
@@ -1005,9 +1001,9 @@ int main(int argc, char * argv [])
    */
   init_ok = (rc = pgm->initialize(pgm, p)) >= 0;
   if (!init_ok) {
-    fprintf(stderr, "%s: initialization failed, rc=%d\n", progname, rc);
+    avrdude_message("%s: initialization failed, rc=%d\n", progname, rc);
     if (!ovsigck) {
-      fprintf(stderr, "%sDouble check connections and try again, "
+      avrdude_message("%sDouble check connections and try again, "
               "or use -F to override\n"
               "%sthis check.\n\n",
               progbuf, progbuf);
@@ -1020,9 +1016,8 @@ int main(int argc, char * argv [])
   pgm->rdy_led(pgm, ON);
 
   if (quell_progress < 2) {
-    fprintf(stderr,
-            "%s: AVR device initialized and ready to accept instructions\n",
-            progname);
+    avrdude_message("%s: AVR device initialized and ready to accept instructions\n",
+                    progname);
   }
 
   /*
@@ -1040,7 +1035,7 @@ int main(int argc, char * argv [])
     if (init_ok) {
       rc = avr_signature(pgm, p);
       if (rc != 0) {
-        fprintf(stderr, "%s: error reading signature data, rc=%d\n",
+        avrdude_message("%s: error reading signature data, rc=%d\n",
           progname, rc);
         exitrc = 1;
         goto main_exit;
@@ -1049,21 +1044,20 @@ int main(int argc, char * argv [])
   
     sig = avr_locate_mem(p, "signature");
     if (sig == NULL) {
-      fprintf(stderr,
-              "%s: WARNING: signature data not defined for device \"%s\"\n",
-              progname, p->desc);
+      avrdude_message("%s: WARNING: signature data not defined for device \"%s\"\n",
+                      progname, p->desc);
     }
 
     if (sig != NULL) {
       int ff, zz;
 
       if (quell_progress < 2) {
-        fprintf(stderr, "%s: Device signature = 0x", progname);
+        avrdude_message("%s: Device signature = 0x", progname);
       }
       ff = zz = 1;
       for (i=0; i<sig->size; i++) {
         if (quell_progress < 2) {
-          fprintf(stderr, "%02x", sig->buf[i]);
+          avrdude_message("%02x", sig->buf[i]);
         }
         if (sig->buf[i] != 0xff)
           ff = 0;
@@ -1074,17 +1068,16 @@ int main(int argc, char * argv [])
         if (++attempt < 3) {
           waittime *= 5;
           if (quell_progress < 2) {
-              fprintf(stderr, " (retrying)\n");
+              avrdude_message(" (retrying)\n");
           }
           goto sig_again;
         }
         if (quell_progress < 2) {
-            fprintf(stderr, "\n");
+            avrdude_message("\n");
         }
-        fprintf(stderr,
-                "%s: Yikes!  Invalid device signature.\n", progname);
+        avrdude_message("%s: Yikes!  Invalid device signature.\n", progname);
         if (!ovsigck) {
-          fprintf(stderr, "%sDouble check connections and try again, "
+          avrdude_message("%sDouble check connections and try again, "
                   "or use -F to override\n"
                   "%sthis check.\n\n",
                   progbuf, progbuf);
@@ -1093,7 +1086,7 @@ int main(int argc, char * argv [])
         }
       } else {
         if (quell_progress < 2) {
-          fprintf(stderr, "\n");
+          avrdude_message("\n");
         }
       }
 
@@ -1101,12 +1094,11 @@ int main(int argc, char * argv [])
           sig->buf[0] != p->signature[0] ||
           sig->buf[1] != p->signature[1] ||
           sig->buf[2] != p->signature[2]) {
-        fprintf(stderr,
-                "%s: Expected signature for %s is %02X %02X %02X\n",
-                progname, p->desc,
-                p->signature[0], p->signature[1], p->signature[2]);
+        avrdude_message("%s: Expected signature for %s is %02X %02X %02X\n",
+                        progname, p->desc,
+                        p->signature[0], p->signature[1], p->signature[2]);
         if (!ovsigck) {
-          fprintf(stderr, "%sDouble check chip, "
+          avrdude_message("%sDouble check chip, "
                   "or use -F to override this check.\n",
                   progbuf);
           exitrc = 1;
@@ -1130,7 +1122,7 @@ int main(int argc, char * argv [])
 			{
 			  if (verbose > 0)
 				{
-				fprintf(stderr, "%s: safemode: Fuse reading not support by programmer.\n"
+				avrdude_message("%s: safemode: Fuse reading not support by programmer.\n"
                 	            "              Safemode disabled.\n", progname);
 				}
 	  		safemode = 0;
@@ -1138,7 +1130,7 @@ int main(int argc, char * argv [])
       else
 			{
 
-      		fprintf(stderr, "%s: safemode: To protect your AVR the programming "
+      		avrdude_message("%s: safemode: To protect your AVR the programming "
             				    "will be aborted\n",
                					 progname);
       		exitrc = 1;
@@ -1154,11 +1146,10 @@ int main(int argc, char * argv [])
     if ((p->flags & AVRPART_HAS_PDI) && pgm->page_erase != NULL &&
         lsize(updates) > 0) {
       if (quell_progress < 2) {
-        fprintf(stderr,
-                "%s: NOTE: Programmer supports page erase for Xmega devices.\n"
-                "%sEach page will be erased before programming it, but no chip erase is performed.\n"
-                "%sTo disable page erases, specify the -D option; for a chip-erase, use the -e option.\n",
-                progname, progbuf, progbuf);
+        avrdude_message("%s: NOTE: Programmer supports page erase for Xmega devices.\n"
+                        "%sEach page will be erased before programming it, but no chip erase is performed.\n"
+                        "%sTo disable page erases, specify the -D option; for a chip-erase, use the -e option.\n",
+                        progname, progbuf, progbuf);
       }
     } else {
       AVRMEM * m;
@@ -1173,11 +1164,10 @@ int main(int argc, char * argv [])
         if ((strcasecmp(m->desc, memname) == 0) && (upd->op == DEVICE_WRITE)) {
           erase = 1;
           if (quell_progress < 2) {
-            fprintf(stderr,
-                    "%s: NOTE: \"%s\" memory has been specified, an erase cycle "
-                    "will be performed\n"
-                    "%sTo disable this feature, specify the -D option.\n",
-                    progname, memname, progbuf);
+            avrdude_message("%s: NOTE: \"%s\" memory has been specified, an erase cycle "
+                            "will be performed\n"
+                            "%sTo disable this feature, specify the -D option.\n",
+                            progname, memname, progbuf);
           }
           break;
         }
@@ -1191,12 +1181,11 @@ int main(int argc, char * argv [])
      * before the chip can accept new programming
      */
     if (uflags & UF_NOWRITE) {
-      fprintf(stderr,
-	      "%s: conflicting -e and -n options specified, NOT erasing chip\n",
-	      progname);
+      avrdude_message("%s: conflicting -e and -n options specified, NOT erasing chip\n",
+                      progname);
     } else {
       if (quell_progress < 2) {
-      	fprintf(stderr, "%s: erasing chip\n", progname);
+      	avrdude_message("%s: erasing chip\n", progname);
       }
       exitrc = avr_chip_erase(pgm, p);
       if(exitrc) goto main_exit;
@@ -1241,7 +1230,7 @@ int main(int argc, char * argv [])
     char yes[1] = {'y'};
 
     if (quell_progress < 2) {
-      fprintf(stderr, "\n");
+      avrdude_message("\n");
     }
 
     //Restore the default fuse values
@@ -1252,20 +1241,19 @@ int main(int argc, char * argv [])
                            &safemodeafter_efuse, &safemodeafter_fuse, pgm, p, verbose) != 0) {
       /* Uh-oh.. try once more to read back fuses */
       if (safemode_readfuses(&safemodeafter_lfuse, &safemodeafter_hfuse,
-                             &safemodeafter_efuse, &safemodeafter_fuse, pgm, p, verbose) != 0) { 
-        fprintf(stderr,
-                "%s: safemode: Sorry, reading back fuses was unreliable. "
-                "I have given up and exited programming mode\n",
-                progname);
+                             &safemodeafter_efuse, &safemodeafter_fuse, pgm, p, verbose) != 0) {
+        avrdude_message("%s: safemode: Sorry, reading back fuses was unreliable. "
+                        "I have given up and exited programming mode\n",
+                        progname);
         exitrc = 1;
-        goto main_exit;		  
+        goto main_exit;        
       }
     }
     
     /* Now check what fuses are against what they should be */
     if (safemodeafter_fuse != safemode_fuse) {
       fuses_updated = 1;
-      fprintf(stderr, "%s: safemode: fuse changed! Was %x, and is now %x\n",
+      avrdude_message("%s: safemode: fuse changed! Was %x, and is now %x\n",
               progname, safemode_fuse, safemodeafter_fuse);
 
               
@@ -1281,10 +1269,10 @@ int main(int argc, char * argv [])
             /* Enough chit-chat, time to program some fuses and check them */
             if (safemode_writefuse (safemode_fuse, "fuse", pgm, p,
                                     10, verbose) == 0) {
-                fprintf(stderr, "%s: safemode: and is now rescued\n", progname);
+                avrdude_message("%s: safemode: and is now rescued\n", progname);
             }
             else {
-                fprintf(stderr, "%s: and COULD NOT be changed\n", progname);
+                avrdude_message("%s: and COULD NOT be changed\n", progname);
                 failures++;
             }
       }
@@ -1293,7 +1281,7 @@ int main(int argc, char * argv [])
     /* Now check what fuses are against what they should be */
     if (safemodeafter_lfuse != safemode_lfuse) {
       fuses_updated = 1;
-      fprintf(stderr, "%s: safemode: lfuse changed! Was %x, and is now %x\n",
+      avrdude_message("%s: safemode: lfuse changed! Was %x, and is now %x\n",
               progname, safemode_lfuse, safemodeafter_lfuse);
 
               
@@ -1309,10 +1297,10 @@ int main(int argc, char * argv [])
             /* Enough chit-chat, time to program some fuses and check them */
             if (safemode_writefuse (safemode_lfuse, "lfuse", pgm, p,
                                     10, verbose) == 0) {
-                fprintf(stderr, "%s: safemode: and is now rescued\n", progname);
+                avrdude_message("%s: safemode: and is now rescued\n", progname);
             }
             else {
-                fprintf(stderr, "%s: and COULD NOT be changed\n", progname);
+                avrdude_message("%s: and COULD NOT be changed\n", progname);
                 failures++;
             }
       }
@@ -1321,7 +1309,7 @@ int main(int argc, char * argv [])
     /* Now check what fuses are against what they should be */
     if (safemodeafter_hfuse != safemode_hfuse) {
       fuses_updated = 1;
-      fprintf(stderr, "%s: safemode: hfuse changed! Was %x, and is now %x\n",
+      avrdude_message("%s: safemode: hfuse changed! Was %x, and is now %x\n",
               progname, safemode_hfuse, safemodeafter_hfuse);
               
       /* Ask user - should we change them */
@@ -1334,10 +1322,10 @@ int main(int argc, char * argv [])
             /* Enough chit-chat, time to program some fuses and check them */
             if (safemode_writefuse(safemode_hfuse, "hfuse", pgm, p,
                                     10, verbose) == 0) {
-                fprintf(stderr, "%s: safemode: and is now rescued\n", progname);
+                avrdude_message("%s: safemode: and is now rescued\n", progname);
             }
             else {
-                fprintf(stderr, "%s: and COULD NOT be changed\n", progname);
+                avrdude_message("%s: and COULD NOT be changed\n", progname);
                 failures++;
             }
       }
@@ -1346,7 +1334,7 @@ int main(int argc, char * argv [])
     /* Now check what fuses are against what they should be */
     if (safemodeafter_efuse != safemode_efuse) {
       fuses_updated = 1;
-      fprintf(stderr, "%s: safemode: efuse changed! Was %x, and is now %x\n",
+      avrdude_message("%s: safemode: efuse changed! Was %x, and is now %x\n",
               progname, safemode_efuse, safemodeafter_efuse);
 
       /* Ask user - should we change them */
@@ -1359,23 +1347,23 @@ int main(int argc, char * argv [])
             /* Enough chit-chat, time to program some fuses and check them */
             if (safemode_writefuse (safemode_efuse, "efuse", pgm, p,
                                     10, verbose) == 0) {
-                fprintf(stderr, "%s: safemode: and is now rescued\n", progname);
+                avrdude_message("%s: safemode: and is now rescued\n", progname);
             }
             else {
-                fprintf(stderr, "%s: and COULD NOT be changed\n", progname);
+                avrdude_message("%s: and COULD NOT be changed\n", progname);
                 failures++;
             }
        }
     }
 
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: safemode: ", progname);
+      avrdude_message("%s: safemode: ", progname);
       if (failures == 0) {
-        fprintf(stderr, "Fuses OK (E:%02X, H:%02X, L:%02X)\n",
+        avrdude_message("Fuses OK (E:%02X, H:%02X, L:%02X)\n",
                 safemode_efuse, safemode_hfuse, safemode_lfuse);
       }
       else {
-        fprintf(stderr, "Fuses not recovered, sorry\n");
+        avrdude_message("Fuses not recovered, sorry\n");
       }
     }
 
@@ -1403,7 +1391,7 @@ main_exit:
   }
 
   if (quell_progress < 2) {
-    fprintf(stderr, "\n%s done.  Thank you.\n\n", progname);
+    avrdude_message("\n%s done.  Thank you.\n\n", progname);
   }
 
   return exitrc;
diff --git a/par.c b/par.c
index 32dbf3b8..1829f325 100644
--- a/par.c
+++ b/par.c
@@ -242,7 +242,7 @@ static int par_open(PROGRAMMER * pgm, char * port)
 
   ppi_open(port, &pgm->fd);
   if (pgm->fd.ifd < 0) {
-    fprintf(stderr, "%s: failed to open parallel port \"%s\"\n\n",
+    avrdude_message("%s: failed to open parallel port \"%s\"\n\n",
             progname, port);
     return -1;
   }
@@ -252,14 +252,14 @@ static int par_open(PROGRAMMER * pgm, char * port)
    */
   rc = ppi_getall(&pgm->fd, PPIDATA);
   if (rc < 0) {
-    fprintf(stderr, "%s: error reading status of ppi data port\n", progname);
+    avrdude_message("%s: error reading status of ppi data port\n", progname);
     return -1;
   }
   pgm->ppidata = rc;
 
   rc = ppi_getall(&pgm->fd, PPICTRL);
   if (rc < 0) {
-    fprintf(stderr, "%s: error reading status of ppi ctrl port\n", progname);
+    avrdude_message("%s: error reading status of ppi ctrl port\n", progname);
     return -1;
   }
   pgm->ppictrl = rc;
@@ -403,9 +403,8 @@ void par_initpgm(PROGRAMMER * pgm)
 
 void par_initpgm(PROGRAMMER * pgm)
 {
-  fprintf(stderr,
-	  "%s: parallel port access not available in this configuration\n",
-	  progname);
+  avrdude_message("%s: parallel port access not available in this configuration\n",
+                  progname);
 }
 
 #endif /* HAVE_PARPORT */
diff --git a/pgm.c b/pgm.c
index bf3a9fbe..e9c3567b 100644
--- a/pgm.c
+++ b/pgm.c
@@ -39,7 +39,7 @@ static void pgm_default_6 (struct programmer_t *, const char *);
 
 static int pgm_default_open (struct programmer_t *pgm, char * name)
 {
-  fprintf (stderr, "\n%s: Fatal error: Programmer does not support open()",
+  avrdude_message("\n%s: Fatal error: Programmer does not support open()",
                progname);
   return -1;
 }
@@ -68,7 +68,7 @@ PROGRAMMER * pgm_new(void)
 
   pgm = (PROGRAMMER *)malloc(sizeof(*pgm));
   if (pgm == NULL) {
-    fprintf(stderr, "%s: out of memory allocating programmer structure\n",
+    avrdude_message("%s: out of memory allocating programmer structure\n",
             progname);
     exit(1);
   }
@@ -159,7 +159,7 @@ PROGRAMMER * pgm_dup(const PROGRAMMER * const src)
 
   pgm = (PROGRAMMER *)malloc(sizeof(*pgm));
   if (pgm == NULL) {
-    fprintf(stderr, "%s: out of memory allocating programmer structure\n",
+    avrdude_message("%s: out of memory allocating programmer structure\n",
             progname);
     exit(1);
   }
@@ -172,7 +172,7 @@ PROGRAMMER * pgm_dup(const PROGRAMMER * const src)
   for (ln = lfirst(src->usbpid); ln; ln = lnext(ln)) {
     int *ip = malloc(sizeof(int));
     if (ip == NULL) {
-      fprintf(stderr, "%s: out of memory allocating programmer structure\n",
+      avrdude_message("%s: out of memory allocating programmer structure\n",
               progname);
       exit(1);
     }
@@ -186,7 +186,7 @@ PROGRAMMER * pgm_dup(const PROGRAMMER * const src)
 
 static void pgm_default(void)
 {
-  fprintf(stderr, "%s: programmer operation not supported\n", progname);
+  avrdude_message("%s: programmer operation not supported\n", progname);
 }
 
 
@@ -223,8 +223,8 @@ static void pgm_default_6 (struct programmer_t * pgm, const char * p)
 
 void programmer_display(PROGRAMMER * pgm, const char * p)
 {
-  fprintf(stderr, "%sProgrammer Type : %s\n", p, pgm->type);
-  fprintf(stderr, "%sDescription     : %s\n", p, pgm->desc);
+  avrdude_message("%sProgrammer Type : %s\n", p, pgm->type);
+  avrdude_message("%sDescription     : %s\n", p, pgm->desc);
 
   pgm->display(pgm, p);
 }
@@ -233,25 +233,25 @@ void programmer_display(PROGRAMMER * pgm, const char * p)
 void pgm_display_generic_mask(PROGRAMMER * pgm, const char * p, unsigned int show)
 {
   if(show & (1<<PPI_AVR_VCC)) 
-    fprintf(stderr, "%s  VCC     = %s\n", p, pins_to_str(&pgm->pin[PPI_AVR_VCC]));
+    avrdude_message("%s  VCC     = %s\n", p, pins_to_str(&pgm->pin[PPI_AVR_VCC]));
   if(show & (1<<PPI_AVR_BUFF))
-    fprintf(stderr, "%s  BUFF    = %s\n", p, pins_to_str(&pgm->pin[PPI_AVR_BUFF]));
+    avrdude_message("%s  BUFF    = %s\n", p, pins_to_str(&pgm->pin[PPI_AVR_BUFF]));
   if(show & (1<<PIN_AVR_RESET))
-    fprintf(stderr, "%s  RESET   = %s\n", p, pins_to_str(&pgm->pin[PIN_AVR_RESET]));
+    avrdude_message("%s  RESET   = %s\n", p, pins_to_str(&pgm->pin[PIN_AVR_RESET]));
   if(show & (1<<PIN_AVR_SCK))
-    fprintf(stderr, "%s  SCK     = %s\n", p, pins_to_str(&pgm->pin[PIN_AVR_SCK]));
+    avrdude_message("%s  SCK     = %s\n", p, pins_to_str(&pgm->pin[PIN_AVR_SCK]));
   if(show & (1<<PIN_AVR_MOSI))
-    fprintf(stderr, "%s  MOSI    = %s\n", p, pins_to_str(&pgm->pin[PIN_AVR_MOSI]));
+    avrdude_message("%s  MOSI    = %s\n", p, pins_to_str(&pgm->pin[PIN_AVR_MOSI]));
   if(show & (1<<PIN_AVR_MISO))
-    fprintf(stderr, "%s  MISO    = %s\n", p, pins_to_str(&pgm->pin[PIN_AVR_MISO]));
+    avrdude_message("%s  MISO    = %s\n", p, pins_to_str(&pgm->pin[PIN_AVR_MISO]));
   if(show & (1<<PIN_LED_ERR))
-    fprintf(stderr, "%s  ERR LED = %s\n", p, pins_to_str(&pgm->pin[PIN_LED_ERR]));
+    avrdude_message("%s  ERR LED = %s\n", p, pins_to_str(&pgm->pin[PIN_LED_ERR]));
   if(show & (1<<PIN_LED_RDY))
-    fprintf(stderr, "%s  RDY LED = %s\n", p, pins_to_str(&pgm->pin[PIN_LED_RDY]));
+    avrdude_message("%s  RDY LED = %s\n", p, pins_to_str(&pgm->pin[PIN_LED_RDY]));
   if(show & (1<<PIN_LED_PGM))
-    fprintf(stderr, "%s  PGM LED = %s\n", p, pins_to_str(&pgm->pin[PIN_LED_PGM]));
+    avrdude_message("%s  PGM LED = %s\n", p, pins_to_str(&pgm->pin[PIN_LED_PGM]));
   if(show & (1<<PIN_LED_VFY))
-    fprintf(stderr, "%s  VFY LED = %s\n", p, pins_to_str(&pgm->pin[PIN_LED_VFY]));
+    avrdude_message("%s  VFY LED = %s\n", p, pins_to_str(&pgm->pin[PIN_LED_VFY]));
 }
 
 void pgm_display_generic(PROGRAMMER * pgm, const char * p)
diff --git a/pickit2.c b/pickit2.c
index a9836695..a71ea154 100644
--- a/pickit2.c
+++ b/pickit2.c
@@ -76,13 +76,13 @@
 #endif
 
 #if 0
-#define DEBUG(...) do { fprintf(stderr, __VA_ARGS__); } while(0)
+#define DEBUG(...) do { avrdude_message(__VA_ARGS__); } while(0) 
 #else
 #define DEBUG(...) ((void)0)
 #endif
 
 #if 0
-#define DEBUGRECV(...) do { fprintf(stderr, __VA_ARGS__); } while(0)
+#define DEBUGRECV(...) do { avrdude_message(__VA_ARGS__); } while(0) 
 #else
 #define DEBUGRECV(...) ((void)0)
 #endif
@@ -169,9 +169,8 @@ static void pickit2_setup(PROGRAMMER * pgm)
 {
     if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0)
     {
-        fprintf(stderr,
-                "%s: pickit2_setup(): Out of memory allocating private data\n",
-                progname);
+        avrdude_message("%s: pickit2_setup(): Out of memory allocating private data\n",
+                        progname);
         exit(1);
     }
     memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -193,9 +192,8 @@ static int pickit2_open(PROGRAMMER * pgm, char * port)
     if (PDATA(pgm)->usb_handle == INVALID_HANDLE_VALUE)
     {
         /* no PICkit2 found */
-        fprintf(stderr,
-                "%s: error: could not find PICkit2 with vid=0x%x pid=0x%x\n",
-                progname, PICKIT2_VID, PICKIT2_PID);
+        avrdude_message("%s: error: could not find PICkit2 with vid=0x%x pid=0x%x\n",
+                        progname, PICKIT2_VID, PICKIT2_PID);
         return -1;
     }
     else
@@ -215,9 +213,8 @@ static int pickit2_open(PROGRAMMER * pgm, char * port)
     if (usb_open_device(&(PDATA(pgm)->usb_handle), PICKIT2_VID, PICKIT2_PID) < 0)
     {
         /* no PICkit2 found */
-        fprintf(stderr,
-                "%s: error: could not find PICkit2 with vid=0x%x pid=0x%x\n",
-                progname, PICKIT2_VID, PICKIT2_PID);
+        avrdude_message("%s: error: could not find PICkit2 with vid=0x%x pid=0x%x\n",
+                        progname, PICKIT2_VID, PICKIT2_PID);
         return -1;
     }
 #endif
@@ -267,7 +264,7 @@ static int pickit2_initialize(PROGRAMMER * pgm, AVRPART * p)
         {
             if (verbose)
             {
-                fprintf(stderr, "%s: %s firmware version %d.%d.%d\n", progname, pgm->desc, (int)report[1], (int)report[2], (int)report[3]);
+                avrdude_message("%s: %s firmware version %d.%d.%d\n", progname, pgm->desc, (int)report[1], (int)report[2], (int)report[3]);
             }
 
             // set the pins, apply reset,
@@ -303,19 +300,19 @@ static int pickit2_initialize(PROGRAMMER * pgm, AVRPART * p)
 
             if (pickit2_write_report(pgm, report) < 0)
             {
-                fprintf(stderr, "pickit2_read_report failed (ec %d). %s\n", errorCode, usb_strerror());
+                avrdude_message("pickit2_read_report failed (ec %d). %s\n", errorCode, usb_strerror());
                 return -1;
             }
         }
         else
         {
-            fprintf(stderr, "pickit2_read_report failed (ec %d). %s\n", errorCode, usb_strerror());
+            avrdude_message("pickit2_read_report failed (ec %d). %s\n", errorCode, usb_strerror());
             return -1;
         }
     }
     else
     {
-        fprintf(stderr, "pickit2_write_report failed (ec %d). %s\n", errorCode, usb_strerror());
+        avrdude_message("pickit2_write_report failed (ec %d). %s\n", errorCode, usb_strerror());
         return -1;
     }
 
@@ -428,7 +425,7 @@ static int  pickit2_program_enable(struct programmer_t * pgm, AVRPART * p)
 
     if (p->op[AVR_OP_PGM_ENABLE] == NULL)
     {
-        fprintf(stderr, "program enable instruction not defined for part \"%s\"\n",
+        avrdude_message("program enable instruction not defined for part \"%s\"\n",
                 p->desc);
         return -1;
     }
@@ -440,13 +437,13 @@ static int  pickit2_program_enable(struct programmer_t * pgm, AVRPART * p)
     if (verbose)
     {
         int i;
-        fprintf(stderr, "program_enable(): sending command. Resp = ");
+        avrdude_message("program_enable(): sending command. Resp = ");
 
         for (i = 0; i < 4; i++)
         {
-            fprintf(stderr, "%x ", (int)res[i]);
+            avrdude_message("%x ", (int)res[i]);
         }
-        fprintf(stderr, "\n");
+        avrdude_message("\n");
     }
 
     // check for sync character
@@ -463,7 +460,7 @@ static int  pickit2_chip_erase(struct programmer_t * pgm, AVRPART * p)
 
     if (p->op[AVR_OP_CHIP_ERASE] == NULL)
     {
-        fprintf(stderr, "chip erase instruction not defined for part \"%s\"\n",
+        avrdude_message("chip erase instruction not defined for part \"%s\"\n",
                 p->desc);
         return -1;
     }
@@ -540,7 +537,7 @@ static int  pickit2_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
             }
             else
             {
-                fprintf(stderr, "no read command specified\n");
+                avrdude_message("no read command specified\n");
                 return -1;
             }
 
@@ -552,7 +549,7 @@ static int  pickit2_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 
         if (bytes_read < 0)
         {
-            fprintf(stderr, "Failed @ pgm->spi()\n");
+            avrdude_message("Failed @ pgm->spi()\n");
             pgm->err_led(pgm, ON);
             return -1;
         }
@@ -586,9 +583,8 @@ static int pickit2_commit_page(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     wp = mem->op[AVR_OP_WRITEPAGE];
     if (wp == NULL)
     {
-        fprintf(stderr,
-                "pickit2_commit_page(): memory \"%s\" not configured for page writes\n",
-                mem->desc);
+        avrdude_message("pickit2_commit_page(): memory \"%s\" not configured for page writes\n",
+                        mem->desc);
         return -1;
     }
 
@@ -635,7 +631,7 @@ static int  pickit2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     // only paged write for flash implemented
     if (strcmp(mem->desc, "flash") != 0 && strcmp(mem->desc, "eeprom") != 0)
     {
-        fprintf(stderr, "Part does not support %d paged write of %s\n", page_size, mem->desc);
+        avrdude_message("Part does not support %d paged write of %s\n", page_size, mem->desc);
         return -1;
     }
 
@@ -692,7 +688,7 @@ static int  pickit2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
                 writeop = mem->op[AVR_OP_WRITE_LO];
                 caddr = addr;       // maybe this should divide by 2 & use the write_high opcode also
 
-                fprintf(stderr, "Error AVR_OP_WRITE_LO defined only (where's the HIGH command?)\n");
+                avrdude_message("Error AVR_OP_WRITE_LO defined only (where's the HIGH command?)\n");
                 return -1;
             }
             else
@@ -717,7 +713,7 @@ static int  pickit2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 
         if (bytes_read < 0)
         {
-            fprintf(stderr, "Failed @ pgm->spi()\n");
+            avrdude_message("Failed @ pgm->spi()\n");
             pgm->err_led(pgm, ON);
             return -1;
         }
@@ -1159,7 +1155,7 @@ static int usb_open_device(struct usb_dev_handle **device, int vendor, int produ
                 if (handle == NULL)
                 {
                     errorCode = USB_ERROR_ACCESS;
-                    fprintf(stderr, "%s: Warning: cannot open USB device: %s\n", progname, usb_strerror());
+                    avrdude_message("%s: Warning: cannot open USB device: %s\n", progname, usb_strerror());
                     continue;
                 }
 
@@ -1168,18 +1164,18 @@ static int usb_open_device(struct usb_dev_handle **device, int vendor, int produ
                 {
                     if (verbose)
                     {
-                        fprintf(stderr, "Device %p seemed to open OK.\n", handle);
+                        avrdude_message("Device %p seemed to open OK.\n", handle);
                     }
 
                     if ((errorCode = usb_set_configuration(handle, 1)) < 0)
                     {
-                        fprintf(stderr, "Could not set configuration. Error code %d, %s.\n"
+                        avrdude_message("Could not set configuration. Error code %d, %s.\n"
                                 "You may need to run avrdude as root or set up correct usb port permissions.", errorCode, usb_strerror());
                     }
 
                     if ((errorCode = usb_claim_interface(handle, 0)) < 0)
                     {
-                        fprintf(stderr, "Could not claim interface. Error code %d, %s\n"
+                        avrdude_message("Could not claim interface. Error code %d, %s\n"
                                 "You may need to run avrdude as root or set up correct usb port permissions.", errorCode, usb_strerror());
                     }
 
@@ -1222,9 +1218,8 @@ static int  pickit2_parseextparams(struct programmer_t * pgm, LISTID extparms)
             int clock_rate;
             if (sscanf(extended_param, "clockrate=%i", &clock_rate) != 1 || clock_rate <= 0)
             {
-                fprintf(stderr,
-                        "%s: pickit2_parseextparms(): invalid clockrate '%s'\n",
-                        progname, extended_param);
+                avrdude_message("%s: pickit2_parseextparms(): invalid clockrate '%s'\n",
+                                progname, extended_param);
                 rv = -1;
                 continue;
             }
@@ -1234,9 +1229,8 @@ static int  pickit2_parseextparams(struct programmer_t * pgm, LISTID extparms)
 
             if (verbose >= 2)
             {
-                fprintf(stderr,
-                        "%s: pickit2_parseextparms(): clockrate set to 0x%02x\n",
-                        progname, clock_rate);
+                avrdude_message("%s: pickit2_parseextparms(): clockrate set to 0x%02x\n",
+                                progname, clock_rate);
             }
             PDATA(pgm)->clock_period = clock_period;
 
@@ -1248,27 +1242,24 @@ static int  pickit2_parseextparams(struct programmer_t * pgm, LISTID extparms)
             int timeout;
             if (sscanf(extended_param, "timeout=%i", &timeout) != 1 || timeout <= 0)
             {
-                fprintf(stderr,
-                        "%s: pickit2_parseextparms(): invalid timeout '%s'\n",
-                        progname, extended_param);
+                avrdude_message("%s: pickit2_parseextparms(): invalid timeout '%s'\n",
+                                progname, extended_param);
                 rv = -1;
                 continue;
             }
 
             if (verbose >= 2)
             {
-                fprintf(stderr,
-                        "%s: pickit2_parseextparms(): usb timeout set to 0x%02x\n",
-                        progname, timeout);
+                avrdude_message("%s: pickit2_parseextparms(): usb timeout set to 0x%02x\n",
+                                progname, timeout);
             }
             PDATA(pgm)->transaction_timeout = timeout;
 
             continue;
         }
 
-        fprintf(stderr,
-                "%s: pickit2_parseextparms(): invalid extended parameter '%s'\n",
-                progname, extended_param);
+        avrdude_message("%s: pickit2_parseextparms(): invalid extended parameter '%s'\n",
+                        progname, extended_param);
         rv = -1;
     }
 
@@ -1333,7 +1324,7 @@ void pickit2_initpgm (PROGRAMMER * pgm)
 }
 #else
 static int pickit2_nousb_open (struct programmer_t *pgm, char * name) {
-    fprintf(stderr,
+    avrdude_message(
 #ifdef WIN32NATIVE
             "%s: error: no usb or hid support. Please compile again with libusb or HID support from Win32 DDK installed.\n",
 #else
diff --git a/pindefs.c b/pindefs.c
index 157fe158..4711fcb2 100644
--- a/pindefs.c
+++ b/pindefs.c
@@ -63,7 +63,7 @@ static int pin_fill_old_pinno(const struct pindef_t * const pindef, unsigned int
   for(i = 0; i < PIN_MAX; i++) {
     if(pindef->mask[i / PIN_FIELD_ELEMENT_SIZE] & (1 << (i % PIN_FIELD_ELEMENT_SIZE))) {
       if(found) {
-        fprintf(stderr, "Multiple pins found\n"); //TODO
+        avrdude_message("Multiple pins found\n"); //TODO
         return -1;
       }
       found = true;
@@ -88,7 +88,7 @@ static int pin_fill_old_pinlist(const struct pindef_t * const pindef, unsigned i
   for(i = 0; i < PIN_FIELD_SIZE; i++) {
     if(i == 0) {
       if((pindef->mask[i] & ~PIN_MASK) != 0) {
-        fprintf(stderr, "Pins of higher index than max field size for old pinno found\n");
+        avrdude_message("Pins of higher index than max field size for old pinno found\n");
         return -1;
       }
       if (pindef->mask[i] == 0) {
@@ -100,11 +100,11 @@ static int pin_fill_old_pinlist(const struct pindef_t * const pindef, unsigned i
       } else if(pindef->mask[i] == ((~pindef->inverse[i]) & pindef->mask[i])) {  /* all set bits in mask are cleared in inverse */
         *pinno = pindef->mask[i];
       } else {
-        fprintf(stderr, "pins have different polarity set\n");
+        avrdude_message("pins have different polarity set\n");
         return -1;
       }
     } else if(pindef->mask[i] != 0) {
-      fprintf(stderr, "Pins have higher number than fit in old format\n");
+      avrdude_message("Pins have higher number than fit in old format\n");
       return -1;
     }
   }
@@ -270,12 +270,10 @@ int pins_check(const struct programmer_t * const pgm, const struct pin_checklist
     }
     if(invalid) {
       if(output) {
-        fprintf(stderr,
-                "%s: %s: Following pins are not valid pins for this function: %s\n",
-                progname, avr_pin_name(pinname), pinmask_to_str(invalid_used));
+        avrdude_message("%s: %s: Following pins are not valid pins for this function: %s\n",
+                        progname, avr_pin_name(pinname), pinmask_to_str(invalid_used));
         if(verbose >= 2) {
-          fprintf(stderr,
-                  "%s: %s: Valid pins for this function are: %s\n",
+          avrdude_message("%s: %s: Valid pins for this function are: %s\n",
                   progname, avr_pin_name(pinname), pinmask_to_str(valid_pins->mask));
         }
       }
@@ -283,39 +281,34 @@ int pins_check(const struct programmer_t * const pgm, const struct pin_checklist
     }
     if(inverse) {
       if(output) {
-        fprintf(stderr,
-              "%s: %s: Following pins are not usable as inverse pins for this function: %s\n",
-              progname, avr_pin_name(pinname), pinmask_to_str(inverse_used));
+        avrdude_message("%s: %s: Following pins are not usable as inverse pins for this function: %s\n",
+                        progname, avr_pin_name(pinname), pinmask_to_str(inverse_used));
         if(verbose >= 2) {
-          fprintf(stderr,
-                  "%s: %s: Valid inverse pins for this function are: %s\n",
-                  progname, avr_pin_name(pinname), pinmask_to_str(valid_pins->inverse));
+          avrdude_message("%s: %s: Valid inverse pins for this function are: %s\n",
+                          progname, avr_pin_name(pinname), pinmask_to_str(valid_pins->inverse));
         }
       }
       is_ok = false;
     }
     if(used) {
       if(output) {
-        fprintf(stderr,
-                "%s: %s: Following pins are set for other functions too: %s\n",
-                progname, avr_pin_name(pinname), pinmask_to_str(already_used));
+        avrdude_message("%s: %s: Following pins are set for other functions too: %s\n",
+                        progname, avr_pin_name(pinname), pinmask_to_str(already_used));
         is_ok = false;
       }
     }
     if(!mandatory_used && is_mandatory && !invalid) {
       if(output) {
-        fprintf(stderr,
-                "%s: %s: Mandatory pin is not defined.\n",
-                progname, avr_pin_name(pinname));
+        avrdude_message("%s: %s: Mandatory pin is not defined.\n",
+                        progname, avr_pin_name(pinname));
       }
       is_ok = false;
     }
     if(!is_ok) {
       rv = -1;
     } else if(output && verbose >= 3) {
-      fprintf(stderr,
-              "%s: %s: Pin is ok.\n",
-              progname, avr_pin_name(pinname));
+      avrdude_message("%s: %s: Pin is ok.\n",
+                      progname, avr_pin_name(pinname));
     }
   }
   return rv;
@@ -358,7 +351,7 @@ const char * pins_to_str(const struct pindef_t * const pindef) {
 
 /**
  * Returns the name of the pin as string.
- * 
+ *
  * @param pinname the pinname which we want as string.
  * @returns a string with the pinname, or <unknown> if pinname is invalid.
  */
diff --git a/ppi.c b/ppi.c
index 704b39ee..b40b1270 100644
--- a/ppi.c
+++ b/ppi.c
@@ -69,7 +69,7 @@ static int ppi_shadow_access(union filedescriptor *fdp, int reg,
       shadow_num = 2;
       break;
     default:
-      fprintf(stderr, "%s: avr_set(): invalid register=%d\n",
+      avrdude_message("%s: avr_set(): invalid register=%d\n",
               progname, reg);
       return -1;
       break;
@@ -206,7 +206,7 @@ void ppi_open(char * port, union filedescriptor *fdp)
 
   fd = open(port, O_RDWR);
   if (fd < 0) {
-    fprintf(stderr, "%s: can't open device \"%s\": %s\n",
+    avrdude_message("%s: can't open device \"%s\": %s\n",
               progname, port, strerror(errno));
     fdp->ifd = -1;
     return;
diff --git a/ppiwin.c b/ppiwin.c
index 77c95c8c..6fa6d5ce 100644
--- a/ppiwin.c
+++ b/ppiwin.c
@@ -91,7 +91,7 @@ void ppi_open(char *port, union filedescriptor *fdp)
 
     if(fd < 0)
     {
-        fprintf(stderr, "%s: can't open device \"giveio\"\n\n", progname);
+        avrdude_message("%s: can't open device \"giveio\"\n\n", progname);
         fdp->ifd = -1;
         return;
     }
@@ -119,15 +119,14 @@ void ppi_open(char *port, union filedescriptor *fdp)
 	fd = strtol(port, &cp, 0);
 	if(*port == '\0' || *cp != '\0')
 	{
-	    fprintf(stderr,
-		    "%s: port name \"%s\" is neither lpt1/2/3 nor valid number\n",
-		    progname, port);
+	    avrdude_message("%s: port name \"%s\" is neither lpt1/2/3 nor valid number\n",
+                            progname, port);
 	    fd = -1;
 	}
     }
     if(fd < 0)
     {
-        fprintf(stderr, "%s: can't open device \"%s\"\n\n", progname, port);
+        avrdude_message("%s: can't open device \"%s\"\n\n", progname, port);
         fdp->ifd = -1;
         return;
     }
@@ -361,7 +360,7 @@ int gettimeofday(struct timeval *tv, struct timezone *unused){
        unsigned long dt;                                                   \
        dt = (unsigned long)((stop.QuadPart - start.QuadPart) * 1000 * 1000 \
                             / freq.QuadPart);                              \
-       fprintf(stderr,                                                     \
+       avrdude_message(\
                "hpt:%i usleep usec:%lu sleep msec:%lu timed usec:%lu\n",   \
                has_highperf, us, ((us + 999) / 1000), dt);                 \
      } while (0)
diff --git a/safemode.c b/safemode.c
index 21ba2219..c8875471 100644
--- a/safemode.c
+++ b/safemode.c
@@ -58,9 +58,8 @@ int safemode_writefuse (unsigned char fuse, char * fusename, PROGRAMMER * pgm,
         
     /* Report information to user if needed */
     if (verbose > 0) {
-      fprintf(stderr, 
-              "%s: safemode: Wrote %s to %x, read as %x. %d attempts left\n",
-              progname, fusename, fuse, fuseread, tries-1);
+      avrdude_message("%s: safemode: Wrote %s to %x, read as %x. %d attempts left\n",
+                      progname, fusename, fuse, fuseread, tries-1);
     }
     
     /* If fuse wrote OK, no need to keep going */
@@ -110,7 +109,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
         }
 	if (verbose > 2)
 		{
-		fprintf(stderr, "%s: safemode read 1, fuse value: %x\n",progname, safemode_fuse);
+		avrdude_message("%s: safemode read 1, fuse value: %x\n",progname, safemode_fuse);
 		}
     if(pgm->read_byte(pgm, p, m, 0, &value) != 0)
         {
@@ -118,7 +117,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
         }
 	if (verbose > 2)
 		{
-		fprintf(stderr, "%s: safemode read 2, fuse value: %x\n",progname,  value);
+		avrdude_message("%s: safemode read 2, fuse value: %x\n",progname,  value);
 		}
     if (value == safemode_fuse) {
         if (pgm->read_byte(pgm, p, m, 0, &value) != 0)
@@ -127,7 +126,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
             }
 		if (verbose > 2)
 			{
-			fprintf(stderr, "%s: safemode read 3, fuse value: %x\n",progname,  value);
+			avrdude_message("%s: safemode read 3, fuse value: %x\n",progname,  value);
 			}
         if (value == safemode_fuse)
             {
@@ -143,13 +142,12 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
 		}
 
     if (fusegood == 0)   {
-        fprintf(stderr,
-           "%s: safemode: Verify error - unable to read fuse properly. "
-           "Programmer may not be reliable.\n", progname);
+        avrdude_message("%s: safemode: Verify error - unable to read fuse properly. "
+                        "Programmer may not be reliable.\n", progname);
         return -1;
     }
     else if ((fusegood == 1) && (verbose > 0)) {
-        fprintf(stderr, "%s: safemode: fuse reads as %X\n", progname, safemode_fuse);
+        avrdude_message("%s: safemode: fuse reads as %X\n", progname, safemode_fuse);
     }
 
 
@@ -165,7 +163,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
         }
 	if (verbose > 2)
 		{
-		fprintf(stderr, "%s: safemode read 1, lfuse value: %x\n",progname,  safemode_lfuse);
+		avrdude_message("%s: safemode read 1, lfuse value: %x\n",progname,  safemode_lfuse);
 		}
     if (pgm->read_byte(pgm, p, m, 0, &value) != 0)
         {
@@ -173,7 +171,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
         }
 	if (verbose > 2)
 		{
-		fprintf(stderr, "%s: safemode read 2, lfuse value: %x\n",progname,  value);
+		avrdude_message("%s: safemode read 2, lfuse value: %x\n",progname,  value);
 		}
     if (value == safemode_lfuse) {
         if (pgm->read_byte(pgm, p, m, 0, &value) != 0)
@@ -182,7 +180,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
             }
 		if (verbose > 2)
 			{
-			fprintf(stderr, "%s: safemode read 3, lfuse value: %x\n",progname,  value);
+			avrdude_message("%s: safemode read 3, lfuse value: %x\n",progname,  value);
 			}
         if (value == safemode_lfuse){
         fusegood = 1; /* Fuse read OK three times */
@@ -198,13 +196,12 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
 
 
     if (fusegood == 0)	 {
-        fprintf(stderr,
-           "%s: safemode: Verify error - unable to read lfuse properly. "
-           "Programmer may not be reliable.\n", progname);
+        avrdude_message("%s: safemode: Verify error - unable to read lfuse properly. "
+                        "Programmer may not be reliable.\n", progname);
         return -1;
     }
     else if ((fusegood == 1) && (verbose > 0)) {
-        fprintf(stderr, "%s: safemode: lfuse reads as %X\n", progname, safemode_lfuse);
+        avrdude_message("%s: safemode: lfuse reads as %X\n", progname, safemode_lfuse);
     }
 
   /* Read hfuse three times */  
@@ -219,7 +216,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
         }
 	if (verbose > 2)
 		{
-		fprintf(stderr, "%s: safemode read 1, hfuse value: %x\n",progname,  safemode_hfuse);
+		avrdude_message("%s: safemode read 1, hfuse value: %x\n",progname,  safemode_hfuse);
 		}
     if (pgm->read_byte(pgm, p, m, 0, &value) != 0)
         {
@@ -227,7 +224,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
         }
 	if (verbose > 2)
 		{
-		fprintf(stderr, "%s: safemode read 2, hfuse value: %x\n",progname,  value);
+		avrdude_message("%s: safemode read 2, hfuse value: %x\n",progname,  value);
 		}
     if (value == safemode_hfuse) {
         if (pgm->read_byte(pgm, p, m, 0, &value) != 0)
@@ -236,7 +233,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
             }
 		if (verbose > 2)
 			{
-			fprintf(stderr, "%s: safemode read 3, hfuse value: %x\n",progname, value);
+			avrdude_message("%s: safemode read 3, hfuse value: %x\n",progname, value);
 			}
         if (value == safemode_hfuse){
              fusegood = 1; /* Fuse read OK three times */
@@ -251,13 +248,12 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
 		}
 
     if (fusegood == 0)	 {
-            fprintf(stderr,
-           "%s: safemode: Verify error - unable to read hfuse properly. "
-           "Programmer may not be reliable.\n", progname);
+            avrdude_message("%s: safemode: Verify error - unable to read hfuse properly. "
+                            "Programmer may not be reliable.\n", progname);
        return -2;
     }
     else if ((fusegood == 1) && (verbose > 0)){
-        fprintf(stderr, "%s: safemode: hfuse reads as %X\n", progname, safemode_hfuse);
+        avrdude_message("%s: safemode: hfuse reads as %X\n", progname, safemode_hfuse);
     }
 
   /* Read efuse three times */  
@@ -272,7 +268,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
         }
 	if (verbose > 2)
 		{
-		fprintf(stderr, "%s: safemode read 1, efuse value: %x\n",progname, safemode_efuse);
+		avrdude_message("%s: safemode read 1, efuse value: %x\n",progname, safemode_efuse);
 		}
     if (pgm->read_byte(pgm, p, m, 0, &value) != 0)
         {
@@ -280,7 +276,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
         }
 	if (verbose > 2)
 		{
-		fprintf(stderr, "%s: safemode read 2, efuse value: %x\n",progname,  value);
+		avrdude_message("%s: safemode read 2, efuse value: %x\n",progname,  value);
 		}
     if (value == safemode_efuse) {
         if (pgm->read_byte(pgm, p, m, 0, &value) != 0)
@@ -289,7 +285,7 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
             }
 		if (verbose > 2)
 			{
-			fprintf(stderr, "%s: safemode read 3, efuse value: %x\n",progname, value);
+			avrdude_message("%s: safemode read 3, efuse value: %x\n",progname, value);
 			}
         if (value == safemode_efuse){
              fusegood = 1; /* Fuse read OK three times */
@@ -304,13 +300,12 @@ int safemode_readfuses (unsigned char * lfuse, unsigned char * hfuse,
 		}
  
     if (fusegood == 0)	 {
-        fprintf(stderr,
-           "%s: safemode: Verify error - unable to read efuse properly. "
-           "Programmer may not be reliable.\n", progname);
+        avrdude_message("%s: safemode: Verify error - unable to read efuse properly. "
+                        "Programmer may not be reliable.\n", progname);
         return -3;
         }
     else if ((fusegood == 1) && (verbose > 0)) {
-        fprintf(stderr, "%s: safemode: efuse reads as %X\n", progname, safemode_efuse);
+        avrdude_message("%s: safemode: efuse reads as %X\n", progname, safemode_efuse);
         }
 
   *lfuse = safemode_lfuse;
diff --git a/ser_avrdoper.c b/ser_avrdoper.c
index d061d693..30653da0 100644
--- a/ser_avrdoper.c
+++ b/ser_avrdoper.c
@@ -313,7 +313,7 @@ static int usbOpenDevice(union filedescriptor *fdp, int vendor, char *vendorName
                 handle = usb_open(dev); /* we need to open the device in order to query strings */
                 if(!handle){
                     errorCode = USB_ERROR_ACCESS;
-                    fprintf(stderr, "Warning: cannot open USB device: %s\n",
+                    avrdude_message("Warning: cannot open USB device: %s\n",
 			    usb_strerror());
                     continue;
                 }
@@ -325,23 +325,21 @@ static int usbOpenDevice(union filedescriptor *fdp, int vendor, char *vendorName
 					0x0409, string, sizeof(string));
                 if(len < 0){
                     errorCode = USB_ERROR_IO;
-                    fprintf(stderr,
-			    "Warning: cannot query manufacturer for device: %s\n",
-			    usb_strerror());
+                    avrdude_message("Warning: cannot query manufacturer for device: %s\n",
+                                    usb_strerror());
                 }else{
                     errorCode = USB_ERROR_NOTFOUND;
-                    /* fprintf(stderr, "seen device from vendor ->%s<-\n", string); */
+                    /* avrdude_message("seen device from vendor ->%s<-\n", string); */
                     if(strcmp(string, vendorName) == 0){
                         len = usbGetStringAscii(handle, dev->descriptor.iProduct,
 						0x0409, string, sizeof(string));
                         if(len < 0){
                             errorCode = USB_ERROR_IO;
-                            fprintf(stderr,
-				    "Warning: cannot query product for device: %s\n",
-				    usb_strerror());
+                            avrdude_message("Warning: cannot query product for device: %s\n",
+                                            usb_strerror());
                         }else{
                             errorCode = USB_ERROR_NOTFOUND;
-                            /* fprintf(stderr, "seen product ->%s<-\n", string); */
+                            /* avrdude_message("seen product ->%s<-\n", string); */
                             if(strcmp(string, productName) == 0)
                                 break;
                         }
@@ -357,7 +355,7 @@ static int usbOpenDevice(union filedescriptor *fdp, int vendor, char *vendorName
     if(handle != NULL){
         int rval, retries = 3;
         if(usb_set_configuration(handle, 1)){
-            fprintf(stderr, "Warning: could not set configuration: %s\n",
+            avrdude_message("Warning: could not set configuration: %s\n",
 		    usb_strerror());
         }
         /* now try to claim the interface and detach the kernel HID driver on
@@ -366,13 +364,13 @@ static int usbOpenDevice(union filedescriptor *fdp, int vendor, char *vendorName
         while((rval = usb_claim_interface(handle, 0)) != 0 && retries-- > 0){
 #ifdef LIBUSB_HAS_DETACH_KERNEL_DRIVER_NP
             if(usb_detach_kernel_driver_np(handle, 0) < 0){
-                fprintf(stderr, "Warning: could not detach kernel HID driver: %s\n",
+                avrdude_message("Warning: could not detach kernel HID driver: %s\n",
 			usb_strerror());
             }
 #endif
         }
         if(rval != 0)
-            fprintf(stderr, "Warning: could not claim interface\n");
+            avrdude_message("Warning: could not claim interface\n");
 /* Continue anyway, even if we could not claim the interface. Control transfers
  * should still work.
  */
@@ -405,7 +403,7 @@ static int usbSetReport(union filedescriptor *fdp, int reportType, char *buffer,
 				reportType << 8 | buffer[0], 0, buffer, len, 5000);
     if(bytesSent != len){
         if(bytesSent < 0)
-            fprintf(stderr, "Error sending message: %s\n", usb_strerror());
+            avrdude_message("Error sending message: %s\n", usb_strerror());
         return USB_ERROR_IO;
     }
     return 0;
@@ -426,7 +424,7 @@ static int usbGetReport(union filedescriptor *fdp, int reportType, int reportNum
 				    USB_RECIP_INTERFACE | USB_ENDPOINT_IN, USBRQ_HID_GET_REPORT,
 				    reportType << 8 | reportNumber, 0, buffer, maxLen, 5000);
     if(bytesReceived < 0){
-        fprintf(stderr, "Error sending message: %s\n", usb_strerror());
+        avrdude_message("Error sending message: %s\n", usb_strerror());
         return USB_ERROR_IO;
     }
     *len = bytesReceived;
@@ -450,11 +448,11 @@ static void dumpBlock(char *prefix, unsigned char *buf, int len)
     int i;
 
     if(len <= 8){   /* more compact format for short blocks */
-        fprintf(stderr, "%s: %d bytes: ", prefix, len);
+        avrdude_message("%s: %d bytes: ", prefix, len);
         for(i = 0; i < len; i++){
-            fprintf(stderr, "%02x ", buf[i]);
+            avrdude_message("%02x ", buf[i]);
         }
-        fprintf(stderr, " \"");
+        avrdude_message(" \"");
         for(i = 0; i < len; i++){
             if(buf[i] >= 0x20 && buf[i] < 0x7f){
                 fputc(buf[i], stderr);
@@ -462,20 +460,20 @@ static void dumpBlock(char *prefix, unsigned char *buf, int len)
                 fputc('.', stderr);
             }
         }
-        fprintf(stderr, "\"\n");
+        avrdude_message("\"\n");
     }else{
-        fprintf(stderr, "%s: %d bytes:\n", prefix, len);
+        avrdude_message("%s: %d bytes:\n", prefix, len);
         while(len > 0){
             for(i = 0; i < 16; i++){
                 if(i < len){
-                    fprintf(stderr, "%02x ", buf[i]);
+                    avrdude_message("%02x ", buf[i]);
                 }else{
-                    fprintf(stderr, "   ");
+                    avrdude_message("   ");
                 }
                 if(i == 7)
                     fputc(' ', stderr);
             }
-            fprintf(stderr, "  \"");
+            avrdude_message("  \"");
             for(i = 0; i < 16; i++){
                 if(i < len){
                     if(buf[i] >= 0x20 && buf[i] < 0x7f){
@@ -485,7 +483,7 @@ static void dumpBlock(char *prefix, unsigned char *buf, int len)
                     }
                 }
             }
-            fprintf(stderr, "\"\n");
+            avrdude_message("\"\n");
             buf += 16;
             len -= 16;
         }
@@ -518,7 +516,7 @@ static int avrdoper_open(char *port, union pinfo pinfo, union filedescriptor *fd
 
     rval = usbOpenDevice(fdp, USB_VENDOR_ID, vname, USB_PRODUCT_ID, devname, 1);
     if(rval != 0){
-        fprintf(stderr, "%s: avrdoper_open(): %s\n", progname, usbErrorText(rval));
+        avrdude_message("%s: avrdoper_open(): %s\n", progname, usbErrorText(rval));
         return -1;
     }
     return 0;
@@ -557,11 +555,11 @@ static int avrdoper_send(union filedescriptor *fdp, unsigned char *buf, size_t b
         buffer[1] = thisLen;
         memcpy(buffer + 2, buf, thisLen);
         if(verbose > 3)
-            fprintf(stderr, "Sending %d bytes data chunk\n", thisLen);
+            avrdude_message("Sending %d bytes data chunk\n", thisLen);
         rval = usbSetReport(fdp, USB_HID_REPORT_TYPE_FEATURE, (char *)buffer,
 			    reportDataSizes[lenIndex] + 2);
         if(rval != 0){
-            fprintf(stderr, "%s: avrdoper_send(): %s\n", progname, usbErrorText(rval));
+            avrdude_message("%s: avrdoper_send(): %s\n", progname, usbErrorText(rval));
             return -1;
         }
         buflen -= thisLen;
@@ -587,19 +585,18 @@ static int avrdoperFillBuffer(union filedescriptor *fdp)
         usbErr = usbGetReport(fdp, USB_HID_REPORT_TYPE_FEATURE, lenIndex + 1,
 			      (char *)buffer, &len);
         if(usbErr != 0){
-            fprintf(stderr, "%s: avrdoperFillBuffer(): %s\n", progname, usbErrorText(usbErr));
+            avrdude_message("%s: avrdoperFillBuffer(): %s\n", progname, usbErrorText(usbErr));
             return -1;
         }
         if(verbose > 3)
-            fprintf(stderr, "Received %d bytes data chunk of total %d\n", len - 2, buffer[1]);
+            avrdude_message("Received %d bytes data chunk of total %d\n", len - 2, buffer[1]);
         len -= 2;   /* compensate for report ID and length byte */
         bytesPending = buffer[1] - len; /* amount still buffered */
         if(len > buffer[1])             /* cut away padding */
             len = buffer[1];
         if(avrdoperRxLength + len > sizeof(avrdoperRxBuffer)){
-            fprintf(stderr,
-		    "%s: avrdoperFillBuffer(): internal error: buffer overflow\n",
-		    progname);
+            avrdude_message("%s: avrdoperFillBuffer(): internal error: buffer overflow\n",
+                            progname);
             return -1;
         }
         memcpy(avrdoperRxBuffer + avrdoperRxLength, buffer + 2, len);
@@ -646,7 +643,7 @@ static int avrdoper_drain(union filedescriptor *fdp, int display)
 
 static int avrdoper_set_dtr_rts(union filedescriptor *fdp, int is_on)
 {
-	fprintf(stderr, "%s: AVR-Doper doesn't support DTR/RTS setting\n", progname);
+	avrdude_message("%s: AVR-Doper doesn't support DTR/RTS setting\n", progname);
     return -1;
 }
 
diff --git a/ser_posix.c b/ser_posix.c
index fd244076..fd5daaa5 100644
--- a/ser_posix.c
+++ b/ser_posix.c
@@ -91,7 +91,7 @@ static speed_t serial_baud_lookup(long baud)
    * a warning (if we are verbose) and return the raw rate
    */
   if (verbose > 0)
-      fprintf(stderr, "%s: serial_baud_lookup(): Using non-standard baud rate: %ld",
+      avrdude_message("%s: serial_baud_lookup(): Using non-standard baud rate: %ld",
               progname, baud);
 
   return baud;
@@ -111,7 +111,7 @@ static int ser_setspeed(union filedescriptor *fd, long baud)
    */
   rc = tcgetattr(fd->ifd, &termios);
   if (rc < 0) {
-    fprintf(stderr, "%s: ser_setspeed(): tcgetattr() failed",
+    avrdude_message("%s: ser_setspeed(): tcgetattr() failed",
             progname);
     return -errno;
   }
@@ -135,7 +135,7 @@ static int ser_setspeed(union filedescriptor *fd, long baud)
 
   rc = tcsetattr(fd->ifd, TCSANOW, &termios);
   if (rc < 0) {
-    fprintf(stderr, "%s: ser_setspeed(): tcsetattr() failed\n",
+    avrdude_message("%s: ser_setspeed(): tcsetattr() failed\n",
             progname);
     return -errno;
   }
@@ -167,13 +167,13 @@ net_open(const char *port, union filedescriptor *fdp)
   struct hostent *hp;
 
   if ((hstr = strdup(port)) == NULL) {
-    fprintf(stderr, "%s: net_open(): Out of memory!\n",
+    avrdude_message("%s: net_open(): Out of memory!\n",
 	    progname);
     return -1;
   }
 
   if (((pstr = strchr(hstr, ':')) == NULL) || (pstr == hstr)) {
-    fprintf(stderr, "%s: net_open(): Mangled host:port string \"%s\"\n",
+    avrdude_message("%s: net_open(): Mangled host:port string \"%s\"\n",
 	    progname, hstr);
     free(hstr);
     return -1;
@@ -187,14 +187,14 @@ net_open(const char *port, union filedescriptor *fdp)
   pnum = strtoul(pstr, &end, 10);
 
   if ((*pstr == '\0') || (*end != '\0') || (pnum == 0) || (pnum > 65535)) {
-    fprintf(stderr, "%s: net_open(): Bad port number \"%s\"\n",
+    avrdude_message("%s: net_open(): Bad port number \"%s\"\n",
 	    progname, pstr);
     free(hstr);
     return -1;
   }
 
   if ((hp = gethostbyname(hstr)) == NULL) {
-    fprintf(stderr, "%s: net_open(): unknown host \"%s\"\n",
+    avrdude_message("%s: net_open(): unknown host \"%s\"\n",
 	    progname, hstr);
     free(hstr);
     return -1;
@@ -203,7 +203,7 @@ net_open(const char *port, union filedescriptor *fdp)
   free(hstr);
 
   if ((fd = socket(PF_INET, SOCK_STREAM, 0)) < 0) {
-    fprintf(stderr, "%s: net_open(): Cannot open socket: %s\n",
+    avrdude_message("%s: net_open(): Cannot open socket: %s\n",
 	    progname, strerror(errno));
     return -1;
   }
@@ -214,7 +214,7 @@ net_open(const char *port, union filedescriptor *fdp)
   memcpy(&(sockaddr.sin_addr.s_addr), hp->h_addr, sizeof(struct in_addr));
 
   if (connect(fd, (struct sockaddr *)&sockaddr, sizeof(sockaddr))) {
-    fprintf(stderr, "%s: net_open(): Connect failed: %s\n",
+    avrdude_message("%s: net_open(): Connect failed: %s\n",
 	    progname, strerror(errno));
     return -1;
   }
@@ -271,7 +271,7 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
    */
   fd = open(port, O_RDWR | O_NOCTTY | O_NONBLOCK);
   if (fd < 0) {
-    fprintf(stderr, "%s: ser_open(): can't open device \"%s\": %s\n",
+    avrdude_message("%s: ser_open(): can't open device \"%s\": %s\n",
             progname, port, strerror(errno));
     return -1;
   }
@@ -283,9 +283,8 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
    */
   rc = ser_setspeed(fdp, pinfo.baud);
   if (rc) {
-    fprintf(stderr, 
-            "%s: ser_open(): can't set attributes for device \"%s\": %s\n",
-            progname, port, strerror(-rc));
+    avrdude_message("%s: ser_open(): can't set attributes for device \"%s\": %s\n",
+                    progname, port, strerror(-rc));
     close(fd);
     return -1;
   }
@@ -301,9 +300,8 @@ static void ser_close(union filedescriptor *fd)
   if (saved_original_termios) {
     int rc = tcsetattr(fd->ifd, TCSANOW | TCSADRAIN, &original_termios);
     if (rc) {
-      fprintf(stderr, 
-              "%s: ser_close(): can't reset attributes for device: %s\n",
-              progname, strerror(errno));
+      avrdude_message("%s: ser_close(): can't reset attributes for device: %s\n",
+                      progname, strerror(errno));
     }
     saved_original_termios = 0;
   }
@@ -323,29 +321,29 @@ static int ser_send(union filedescriptor *fd, unsigned char * buf, size_t buflen
 
   if (verbose > 3)
   {
-      fprintf(stderr, "%s: Send: ", progname);
+      avrdude_message("%s: Send: ", progname);
 
       while (buflen) {
         unsigned char c = *buf;
         if (isprint(c)) {
-          fprintf(stderr, "%c ", c);
+          avrdude_message("%c ", c);
         }
         else {
-          fprintf(stderr, ". ");
+          avrdude_message(". ");
         }
-        fprintf(stderr, "[%02x] ", c);
+        avrdude_message("[%02x] ", c);
 
         buf++;
         buflen--;
       }
 
-      fprintf(stderr, "\n");
+      avrdude_message("\n");
   }
 
   while (len) {
     rc = write(fd->ifd, p, (len > 1024) ? 1024 : len);
     if (rc < 0) {
-      fprintf(stderr, "%s: ser_send(): write error: %s\n",
+      avrdude_message("%s: ser_send(): write error: %s\n",
               progname, strerror(errno));
       return -1;
     }
@@ -378,20 +376,18 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
     nfds = select(fd->ifd + 1, &rfds, NULL, NULL, &to2);
     if (nfds == 0) {
       if (verbose > 1)
-	fprintf(stderr,
-		"%s: ser_recv(): programmer is not responding\n",
-		progname);
+	avrdude_message("%s: ser_recv(): programmer is not responding\n",
+                        progname);
       return -1;
     }
     else if (nfds == -1) {
       if (errno == EINTR || errno == EAGAIN) {
-	fprintf(stderr,
-		"%s: ser_recv(): programmer is not responding,reselecting\n",
-		progname);
+	avrdude_message("%s: ser_recv(): programmer is not responding,reselecting\n",
+                        progname);
         goto reselect;
       }
       else {
-        fprintf(stderr, "%s: ser_recv(): select(): %s\n",
+        avrdude_message("%s: ser_recv(): select(): %s\n",
                 progname, strerror(errno));
         return -1;
       }
@@ -399,7 +395,7 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
 
     rc = read(fd->ifd, p, (buflen - len > 1024) ? 1024 : buflen - len);
     if (rc < 0) {
-      fprintf(stderr, "%s: ser_recv(): read error: %s\n",
+      avrdude_message("%s: ser_recv(): read error: %s\n",
               progname, strerror(errno));
       return -1;
     }
@@ -411,22 +407,22 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
 
   if (verbose > 3)
   {
-      fprintf(stderr, "%s: Recv: ", progname);
+      avrdude_message("%s: Recv: ", progname);
 
       while (len) {
         unsigned char c = *p;
         if (isprint(c)) {
-          fprintf(stderr, "%c ", c);
+          avrdude_message("%c ", c);
         }
         else {
-          fprintf(stderr, ". ");
+          avrdude_message(". ");
         }
-        fprintf(stderr, "[%02x] ", c);
+        avrdude_message("[%02x] ", c);
 
         p++;
         len--;
       }
-      fprintf(stderr, "\n");
+      avrdude_message("\n");
   }
 
   return 0;
@@ -445,7 +441,7 @@ static int ser_drain(union filedescriptor *fd, int display)
   timeout.tv_usec = 250000;
 
   if (display) {
-    fprintf(stderr, "drain>");
+    avrdude_message("drain>");
   }
 
   while (1) {
@@ -456,7 +452,7 @@ static int ser_drain(union filedescriptor *fd, int display)
     nfds = select(fd->ifd + 1, &rfds, NULL, NULL, &timeout);
     if (nfds == 0) {
       if (display) {
-        fprintf(stderr, "<drain\n");
+        avrdude_message("<drain\n");
       }
       
       break;
@@ -466,7 +462,7 @@ static int ser_drain(union filedescriptor *fd, int display)
         goto reselect;
       }
       else {
-        fprintf(stderr, "%s: ser_drain(): select(): %s\n",
+        avrdude_message("%s: ser_drain(): select(): %s\n",
                 progname, strerror(errno));
         return -1;
       }
@@ -474,12 +470,12 @@ static int ser_drain(union filedescriptor *fd, int display)
 
     rc = read(fd->ifd, &buf, 1);
     if (rc < 0) {
-      fprintf(stderr, "%s: ser_drain(): read error: %s\n",
+      avrdude_message("%s: ser_drain(): read error: %s\n",
               progname, strerror(errno));
       return -1;
     }
     if (display) {
-      fprintf(stderr, "%02x ", buf);
+      avrdude_message("%02x ", buf);
     }
   }
 
diff --git a/ser_win32.c b/ser_win32.c
index bf986e1a..81ea20dc 100644
--- a/ser_win32.c
+++ b/ser_win32.c
@@ -71,7 +71,7 @@ static DWORD serial_baud_lookup(long baud)
    * a warning (if we are verbose) and return the raw rate
    */
   if (verbose > 0)
-      fprintf(stderr, "%s: serial_baud_lookup(): Using non-standard baud rate: %ld",
+      avrdude_message("%s: serial_baud_lookup(): Using non-standard baud rate: %ld",
               progname, baud);
 
   return baud;
@@ -124,10 +124,9 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
 	 * This is curently not implemented for Win32.
 	 */
 	if (strncmp(port, "net:", strlen("net:")) == 0) {
-		fprintf(stderr,
-			"%s: ser_open(): network connects are currently not"
-			"implemented for Win32 environments\n",
-			progname);
+		avrdude_message("%s: ser_open(): network connects are currently not"
+                                "implemented for Win32 environments\n",
+                                progname);
 		return -1;
 	}
 
@@ -137,9 +136,8 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
 	    newname = malloc(strlen("\\\\.\\") + strlen(port) + 1);
 
 	    if (newname == 0) {
-		fprintf(stderr,
-			"%s: ser_open(): out of memory\n",
-			progname);
+		avrdude_message("%s: ser_open(): out of memory\n",
+                                progname);
 		exit(1);
 	    }
 	    strcpy(newname, "\\\\.\\");
@@ -162,7 +160,7 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
 			(LPTSTR) &lpMsgBuf,
 			0,
 			NULL);
-		fprintf(stderr, "%s: ser_open(): can't open device \"%s\": %s\n",
+		avrdude_message("%s: ser_open(): can't open device \"%s\": %s\n",
 				progname, port, (char*)lpMsgBuf);
 		LocalFree( lpMsgBuf );
 		return -1;
@@ -171,7 +169,7 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
 	if (!SetupComm(hComPort, W32SERBUFSIZE, W32SERBUFSIZE))
 	{
 		CloseHandle(hComPort);
-		fprintf(stderr, "%s: ser_open(): can't set buffers for \"%s\"\n",
+		avrdude_message("%s: ser_open(): can't set buffers for \"%s\"\n",
 				progname, port);
 		return -1;
 	}
@@ -180,7 +178,7 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
 	if (ser_setspeed(fdp, pinfo.baud) != 0)
 	{
 		CloseHandle(hComPort);
-		fprintf(stderr, "%s: ser_open(): can't set com-state for \"%s\"\n",
+		avrdude_message("%s: ser_open(): can't set com-state for \"%s\"\n",
 				progname, port);
 		return -1;
 	}
@@ -188,7 +186,7 @@ static int ser_open(char * port, union pinfo pinfo, union filedescriptor *fdp)
 	if (!serial_w32SetTimeOut(hComPort,0))
 	{
 		CloseHandle(hComPort);
-		fprintf(stderr, "%s: ser_open(): can't set initial timeout for \"%s\"\n",
+		avrdude_message("%s: ser_open(): can't set initial timeout for \"%s\"\n",
 				progname, port);
 		return -1;
 	}
@@ -234,7 +232,7 @@ static int ser_send(union filedescriptor *fd, unsigned char * buf, size_t buflen
 	HANDLE hComPort=(HANDLE)fd->pfd;
 
 	if (hComPort == INVALID_HANDLE_VALUE) {
-		fprintf(stderr, "%s: ser_send(): port not open\n",
+		avrdude_message("%s: ser_send(): port not open\n",
               progname); 
 		return -1;
 	}
@@ -244,33 +242,33 @@ static int ser_send(union filedescriptor *fd, unsigned char * buf, size_t buflen
 
 	if (verbose > 3)
 	{
-		fprintf(stderr, "%s: Send: ", progname);
+		avrdude_message("%s: Send: ", progname);
 
 		while (len) {
 			c = *b;
 			if (isprint(c)) {
-				fprintf(stderr, "%c ", c);
+				avrdude_message("%c ", c);
 			}
 			else {
-				fprintf(stderr, ". ");
+				avrdude_message(". ");
 			}
-			fprintf(stderr, "[%02x] ", c);
+			avrdude_message("[%02x] ", c);
 			b++;
 			len--;
 		}
-      fprintf(stderr, "\n");
+      avrdude_message("\n");
 	}
 	
 	serial_w32SetTimeOut(hComPort,500);
 
 	if (!WriteFile (hComPort, buf, buflen, &written, NULL)) {
-		fprintf(stderr, "%s: ser_send(): write error: %s\n",
+		avrdude_message("%s: ser_send(): write error: %s\n",
               progname, "sorry no info avail"); // TODO
 		return -1;
 	}
 
 	if (written != buflen) {
-		fprintf(stderr, "%s: ser_send(): size/send mismatch\n",
+		avrdude_message("%s: ser_send(): size/send mismatch\n",
               progname); 
 		return -1;
 	}
@@ -288,7 +286,7 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
 	HANDLE hComPort=(HANDLE)fd->pfd;
 	
 	if (hComPort == INVALID_HANDLE_VALUE) {
-		fprintf(stderr, "%s: ser_read(): port not open\n",
+		avrdude_message("%s: ser_read(): port not open\n",
               progname); 
 		return -1;
 	}
@@ -307,7 +305,7 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
 			(LPTSTR) &lpMsgBuf,
 			0,
 			NULL 	);
-		fprintf(stderr, "%s: ser_recv(): read error: %s\n",
+		avrdude_message("%s: ser_recv(): read error: %s\n",
 			      progname, (char*)lpMsgBuf);
 		LocalFree( lpMsgBuf );
 		return -1;
@@ -316,9 +314,8 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
 	/* time out detected */
 	if (read == 0) {
 		if (verbose > 1)
-		fprintf(stderr,
-			"%s: ser_recv(): programmer is not responding\n",
-			progname);
+		avrdude_message("%s: ser_recv(): programmer is not responding\n",
+                                progname);
 		return -1;
 	}
 
@@ -326,22 +323,22 @@ static int ser_recv(union filedescriptor *fd, unsigned char * buf, size_t buflen
 
 	if (verbose > 3)
 	{
-		fprintf(stderr, "%s: Recv: ", progname);
+		avrdude_message("%s: Recv: ", progname);
 
 		while (read) {
 			c = *p;
 			if (isprint(c)) {
-				fprintf(stderr, "%c ", c);
+				avrdude_message("%c ", c);
 			}
 			else {
-				fprintf(stderr, ". ");
+				avrdude_message(". ");
 			}
-			fprintf(stderr, "[%02x] ", c);
+			avrdude_message("[%02x] ", c);
 
 			p++;
 			read--;
 		}
-		fprintf(stderr, "\n");
+		avrdude_message("\n");
 	}
   return 0;
 }
@@ -357,7 +354,7 @@ static int ser_drain(union filedescriptor *fd, int display)
 	HANDLE hComPort=(HANDLE)fd->pfd;
 
   	if (hComPort == INVALID_HANDLE_VALUE) {
-		fprintf(stderr, "%s: ser_drain(): port not open\n",
+		avrdude_message("%s: ser_drain(): port not open\n",
               progname); 
 		return -1;
 	}
@@ -365,7 +362,7 @@ static int ser_drain(union filedescriptor *fd, int display)
 	serial_w32SetTimeOut(hComPort,250);
   
 	if (display) {
-		fprintf(stderr, "drain>");
+		avrdude_message("drain>");
 	}
 
 	while (1) {
@@ -382,17 +379,17 @@ static int ser_drain(union filedescriptor *fd, int display)
 				(LPTSTR) &lpMsgBuf,
 				0,
 				NULL 	);
-			fprintf(stderr, "%s: ser_drain(): read error: %s\n",
+			avrdude_message("%s: ser_drain(): read error: %s\n",
 					  progname, (char*)lpMsgBuf);
 			LocalFree( lpMsgBuf );
 			return -1;
 		}
 
 		if (read) { // data avail
-			if (display) fprintf(stderr, "%02x ", buf[0]);
+			if (display) avrdude_message("%02x ", buf[0]);
 		}
 		else { // no more data
-			if (display) fprintf(stderr, "<drain\n");
+			if (display) avrdude_message("<drain\n");
 			break;
 		}
 	} // while
diff --git a/serbb_posix.c b/serbb_posix.c
index 30e6c210..0a899c64 100644
--- a/serbb_posix.c
+++ b/serbb_posix.c
@@ -239,7 +239,7 @@ static int serbb_open(PROGRAMMER *pgm, char *port)
 
   r = tcgetattr(pgm->fd.ifd, &mode);
   if (r < 0) {
-    fprintf(stderr, "%s: ", port);
+    avrdude_message("%s: ", port);
     perror("tcgetattr");
     return(-1);
   }
@@ -253,7 +253,7 @@ static int serbb_open(PROGRAMMER *pgm, char *port)
 
   r = tcsetattr(pgm->fd.ifd, TCSANOW, &mode);
   if (r < 0) {
-      fprintf(stderr, "%s: ", port);
+      avrdude_message("%s: ", port);
       perror("tcsetattr");
       return(-1);
   }
@@ -262,14 +262,14 @@ static int serbb_open(PROGRAMMER *pgm, char *port)
   flags = fcntl(pgm->fd.ifd, F_GETFL, 0);
   if (flags == -1)
     {
-      fprintf(stderr, "%s: Can not get flags: %s\n",
+      avrdude_message("%s: Can not get flags: %s\n",
 	      progname, strerror(errno));
       return(-1);
     }
   flags &= ~O_NONBLOCK;
   if (fcntl(pgm->fd.ifd, F_SETFL, flags) == -1)
     {
-      fprintf(stderr, "%s: Can not clear nonblock flag: %s\n",
+      avrdude_message("%s: Can not clear nonblock flag: %s\n",
 	      progname, strerror(errno));
       return(-1);
     }
diff --git a/serbb_win32.c b/serbb_win32.c
index 65b6d18f..2d17915e 100644
--- a/serbb_win32.c
+++ b/serbb_win32.c
@@ -98,15 +98,13 @@ static int serbb_setpin(PROGRAMMER * pgm, int pinfunc, int value)
 
         default:
                 if (verbose)
-                        fprintf(stderr,
-                                "%s: serbb_setpin(): unknown pin %d\n",
-                                progname, pin + 1);
+                        avrdude_message("%s: serbb_setpin(): unknown pin %d\n",
+                                        progname, pin + 1);
                 return -1;
         }
         if (verbose > 4)
-                fprintf(stderr,
-                        "%s: serbb_setpin(): EscapeCommFunction(%s)\n",
-                        progname, name);
+                avrdude_message("%s: serbb_setpin(): EscapeCommFunction(%s)\n",
+                                progname, name);
         if (!EscapeCommFunction(hComPort, dwFunc))
         {
                 FormatMessage(
@@ -119,9 +117,8 @@ static int serbb_setpin(PROGRAMMER * pgm, int pinfunc, int value)
                         (LPTSTR) &lpMsgBuf,
                         0,
                         NULL);
-                fprintf(stderr,
-                        "%s: serbb_setpin(): SetCommState() failed: %s\n",
-                        progname, (char *)lpMsgBuf);
+                avrdude_message("%s: serbb_setpin(): SetCommState() failed: %s\n",
+                                progname, (char *)lpMsgBuf);
                 CloseHandle(hComPort);
                 LocalFree(lpMsgBuf);
                 return -1;
@@ -166,17 +163,15 @@ static int serbb_getpin(PROGRAMMER * pgm, int pinfunc)
                                 (LPTSTR) &lpMsgBuf,
                                 0,
                                 NULL);
-                        fprintf(stderr,
-                                "%s: serbb_setpin(): GetCommModemStatus() failed: %s\n",
-                                progname, (char *)lpMsgBuf);
+                        avrdude_message("%s: serbb_setpin(): GetCommModemStatus() failed: %s\n",
+                                        progname, (char *)lpMsgBuf);
                         CloseHandle(hComPort);
                         LocalFree(lpMsgBuf);
                         return -1;
                 }
                 if (verbose > 4)
-                        fprintf(stderr,
-                                "%s: serbb_getpin(): GetCommState() => 0x%lx\n",
-                                progname, modemstate);
+                        avrdude_message("%s: serbb_getpin(): GetCommState() => 0x%lx\n",
+                                        progname, modemstate);
                 switch (pin)
                 {
                 case 1:
@@ -212,15 +207,13 @@ static int serbb_getpin(PROGRAMMER * pgm, int pinfunc)
                 break;
         default:
                 if (verbose)
-                        fprintf(stderr,
-                                "%s: serbb_getpin(): unknown pin %d\n",
-                                progname, pin + 1);
+                        avrdude_message("%s: serbb_getpin(): unknown pin %d\n",
+                                        progname, pin + 1);
                 return -1;
         }
         if (verbose > 4)
-                fprintf(stderr,
-                        "%s: serbb_getpin(): return cached state for %s\n",
-                        progname, name);
+                avrdude_message("%s: serbb_getpin(): return cached state for %s\n",
+                                progname, name);
         if (invert)
                 rv = !rv;
 
@@ -288,7 +281,7 @@ static int serbb_open(PROGRAMMER *pgm, char *port)
 			(LPTSTR) &lpMsgBuf,
 			0,
 			NULL);
-		fprintf(stderr, "%s: ser_open(): can't open device \"%s\": %s\n",
+		avrdude_message("%s: ser_open(): can't open device \"%s\": %s\n",
                         progname, port, (char*)lpMsgBuf);
 		LocalFree(lpMsgBuf);
                 return -1;
@@ -297,7 +290,7 @@ static int serbb_open(PROGRAMMER *pgm, char *port)
 	if (!SetupComm(hComPort, W32SERBUFSIZE, W32SERBUFSIZE))
 	{
 		CloseHandle(hComPort);
-		fprintf(stderr, "%s: ser_open(): can't set buffers for \"%s\"\n",
+		avrdude_message("%s: ser_open(): can't set buffers for \"%s\"\n",
                         progname, port);
                 return -1;
 	}
@@ -316,13 +309,12 @@ static int serbb_open(PROGRAMMER *pgm, char *port)
 	if (!SetCommState(hComPort, &dcb))
 	{
 		CloseHandle(hComPort);
-		fprintf(stderr, "%s: ser_open(): can't set com-state for \"%s\"\n",
+		avrdude_message("%s: ser_open(): can't set com-state for \"%s\"\n",
                         progname, port);
                 return -1;
 	}
         if (verbose > 2)
-                fprintf(stderr,
-                        "%s: ser_open(): opened comm port \"%s\", handle 0x%x\n",
+                avrdude_message("%s: ser_open(): opened comm port \"%s\", handle 0x%x\n",
                         progname, port, (int)hComPort);
 
         pgm->fd.pfd = (void *)hComPort;
@@ -341,9 +333,8 @@ static void serbb_close(PROGRAMMER *pgm)
 		CloseHandle (hComPort);
 	}
         if (verbose > 2)
-                fprintf(stderr,
-                        "%s: ser_close(): closed comm port handle 0x%x\n",
-                        progname, (int)hComPort);
+                avrdude_message("%s: ser_close(): closed comm port handle 0x%x\n",
+                                progname, (int)hComPort);
 
 	hComPort = INVALID_HANDLE_VALUE;
 }
diff --git a/stk500.c b/stk500.c
index 1ac1f7d0..595de309 100644
--- a/stk500.c
+++ b/stk500.c
@@ -72,9 +72,8 @@ static int stk500_recv(PROGRAMMER * pgm, unsigned char * buf, size_t len)
 
   rv = serial_recv(&pgm->fd, buf, len);
   if (rv < 0) {
-    fprintf(stderr,
-	    "%s: stk500_recv(): programmer is not responding\n",
-	    progname);
+    avrdude_message("%s: stk500_recv(): programmer is not responding\n",
+                    progname);
     return -1;
   }
   return 0;
@@ -112,9 +111,8 @@ int stk500_getsync(PROGRAMMER * pgm)
     if (resp[0] == Resp_STK_INSYNC){
       break;
     }
-    fprintf(stderr,
-            "%s: stk500_getsync() attempt %d of %d: not in sync: resp=0x%02x\n",
-            progname, attempt + 1, MAX_SYNC_ATTEMPTS, resp[0]);
+    avrdude_message("%s: stk500_getsync() attempt %d of %d: not in sync: resp=0x%02x\n",
+                    progname, attempt + 1, MAX_SYNC_ATTEMPTS, resp[0]);
   }
   if (attempt == MAX_SYNC_ATTEMPTS) {
     stk500_drain(pgm, 0);
@@ -124,10 +122,9 @@ int stk500_getsync(PROGRAMMER * pgm)
   if (stk500_recv(pgm, resp, 1) < 0)
     return -1;
   if (resp[0] != Resp_STK_OK) {
-    fprintf(stderr, 
-            "%s: stk500_getsync(): can't communicate with device: "
-            "resp=0x%02x\n",
-            progname, resp[0]);
+    avrdude_message("%s: stk500_getsync(): can't communicate with device: "
+                    "resp=0x%02x\n",
+                    progname, resp[0]);
     return -1;
   }
 
@@ -156,7 +153,7 @@ static int stk500_cmd(PROGRAMMER * pgm, const unsigned char *cmd,
   if (stk500_recv(pgm, buf, 1) < 0)
     return -1;
   if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr, "%s: stk500_cmd(): programmer is out of sync\n", progname);
+    avrdude_message("%s: stk500_cmd(): programmer is out of sync\n", progname);
     return -1;
   }
 
@@ -169,7 +166,7 @@ static int stk500_cmd(PROGRAMMER * pgm, const unsigned char *cmd,
   if (stk500_recv(pgm, buf, 1) < 0)
     return -1;
   if (buf[0] != Resp_STK_OK) {
-    fprintf(stderr, "%s: stk500_cmd(): protocol error\n", progname);
+    avrdude_message("%s: stk500_cmd(): protocol error\n", progname);
     return -1;
   }
 
@@ -187,15 +184,14 @@ static int stk500_chip_erase(PROGRAMMER * pgm, AVRPART * p)
   unsigned char res[4];
 
   if (pgm->cmd == NULL) {
-    fprintf(stderr,
-	    "%s: Error: %s programmer uses stk500_chip_erase() but does not\n"
-	    "provide a cmd() method.\n",
-	    progname, pgm->type);
+    avrdude_message("%s: Error: %s programmer uses stk500_chip_erase() but does not\n"
+                    "provide a cmd() method.\n",
+                    progname, pgm->type);
     return -1;
   }
 
   if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
-    fprintf(stderr, "chip erase instruction not defined for part \"%s\"\n",
+    avrdude_message("chip erase instruction not defined for part \"%s\"\n",
             p->desc);
     return -1;
   }
@@ -234,7 +230,7 @@ static int stk500_program_enable(PROGRAMMER * pgm, AVRPART * p)
     return -1;
   if (buf[0] == Resp_STK_NOSYNC) {
     if (tries > 33) {
-      fprintf(stderr, "%s: stk500_program_enable(): can't get into sync\n",
+      avrdude_message("%s: stk500_program_enable(): can't get into sync\n",
               progname);
       return -1;
     }
@@ -243,10 +239,9 @@ static int stk500_program_enable(PROGRAMMER * pgm, AVRPART * p)
     goto retry;
   }
   else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-            "%s: stk500_program_enable(): protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("%s: stk500_program_enable(): protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -1;
   }
 
@@ -256,21 +251,20 @@ static int stk500_program_enable(PROGRAMMER * pgm, AVRPART * p)
     return 0;
   }
   else if (buf[0] == Resp_STK_NODEVICE) {
-    fprintf(stderr, "%s: stk500_program_enable(): no device\n",
+    avrdude_message("%s: stk500_program_enable(): no device\n",
             progname);
     return -1;
   }
 
   if(buf[0] == Resp_STK_FAILED)
   {
-      fprintf(stderr, 
-	      "%s: stk500_program_enable(): failed to enter programming mode\n", 
-		  progname);
+      avrdude_message("%s: stk500_program_enable(): failed to enter programming mode\n",
+                      progname);
 	  return -1;
   }
 
 
-  fprintf(stderr, "%s: stk500_program_enable(): unknown response=0x%02x\n",
+  avrdude_message("%s: stk500_program_enable(): unknown response=0x%02x\n",
           progname, buf[0]);
 
   return -1;
@@ -301,7 +295,7 @@ static int stk500_set_extended_parms(PROGRAMMER * pgm, int n,
     return -1;
   if (buf[0] == Resp_STK_NOSYNC) {
     if (tries > 33) {
-      fprintf(stderr, "%s: stk500_set_extended_parms(): can't get into sync\n",
+      avrdude_message("%s: stk500_set_extended_parms(): can't get into sync\n",
               progname);
       return -1;
     }
@@ -310,10 +304,9 @@ static int stk500_set_extended_parms(PROGRAMMER * pgm, int n,
     goto retry;
   }
   else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-            "%s: stk500_set_extended_parms(): protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("%s: stk500_set_extended_parms(): protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -1;
   }
 
@@ -323,22 +316,21 @@ static int stk500_set_extended_parms(PROGRAMMER * pgm, int n,
     return 0;
   }
   else if (buf[0] == Resp_STK_NODEVICE) {
-    fprintf(stderr, "%s: stk500_set_extended_parms(): no device\n",
+    avrdude_message("%s: stk500_set_extended_parms(): no device\n",
             progname);
     return -1;
   }
 
   if(buf[0] == Resp_STK_FAILED)
   {
-      fprintf(stderr, 
-	      "%s: stk500_set_extended_parms(): failed to set extended "
-              "device programming parameters\n", 
-              progname);
+      avrdude_message("%s: stk500_set_extended_parms(): failed to set extended "
+                      "device programming parameters\n",
+                      progname);
 	  return -1;
   }
 
 
-  fprintf(stderr, "%s: stk500_set_extended_parms(): unknown response=0x%02x\n",
+  avrdude_message("%s: stk500_set_extended_parms(): unknown response=0x%02x\n",
           progname, buf[0]);
 
   return -1;
@@ -373,7 +365,7 @@ static int mib510_isp(PROGRAMMER * pgm, unsigned char cmd)
     return -1;
   if (buf[0] == Resp_STK_NOSYNC) {
     if (tries > 33) {
-      fprintf(stderr, "%s: mib510_isp(): can't get into sync\n",
+      avrdude_message("%s: mib510_isp(): can't get into sync\n",
               progname);
       return -1;
     }
@@ -382,10 +374,9 @@ static int mib510_isp(PROGRAMMER * pgm, unsigned char cmd)
     goto retry;
   }
   else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-            "%s: mib510_isp(): protocol error, "
-            "expect=0x%02x, resp=0x%02x\n",
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("%s: mib510_isp(): protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -1;
   }
 
@@ -395,21 +386,20 @@ static int mib510_isp(PROGRAMMER * pgm, unsigned char cmd)
     return 0;
   }
   else if (buf[0] == Resp_STK_NODEVICE) {
-    fprintf(stderr, "%s: mib510_isp(): no device\n",
+    avrdude_message("%s: mib510_isp(): no device\n",
             progname);
     return -1;
   }
 
   if (buf[0] == Resp_STK_FAILED)
   {
-      fprintf(stderr,
-          "%s: mib510_isp(): command %d failed\n",
-              progname, cmd);
+      avrdude_message("%s: mib510_isp(): command %d failed\n",
+                      progname, cmd);
       return -1;
   }
 
 
-  fprintf(stderr, "%s: mib510_isp(): unknown response=0x%02x\n",
+  avrdude_message("%s: mib510_isp(): unknown response=0x%02x\n",
           progname, buf[0]);
 
   return -1;
@@ -470,7 +460,7 @@ static int stk500_initialize(PROGRAMMER * pgm, AVRPART * p)
   }
 
 #if 0
-  fprintf(stderr, "%s: stk500_initialize(): n_extparms = %d\n", 
+  avrdude_message("%s: stk500_initialize(): n_extparms = %d\n",
           progname, n_extparms);
 #endif
     
@@ -544,9 +534,8 @@ static int stk500_initialize(PROGRAMMER * pgm, AVRPART * p)
   if (stk500_recv(pgm, buf, 1) < 0)
     return -1;
   if (buf[0] == Resp_STK_NOSYNC) {
-    fprintf(stderr,
-            "%s: stk500_initialize(): programmer not in sync, resp=0x%02x\n", 
-            progname, buf[0]);
+    avrdude_message("%s: stk500_initialize(): programmer not in sync, resp=0x%02x\n",
+                    progname, buf[0]);
     if (tries > 33)
       return -1;
     if (stk500_getsync(pgm) < 0)
@@ -554,30 +543,27 @@ static int stk500_initialize(PROGRAMMER * pgm, AVRPART * p)
     goto retry;
   }
   else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-            "%s: stk500_initialize(): (a) protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("%s: stk500_initialize(): (a) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -1;
   }
 
   if (stk500_recv(pgm, buf, 1) < 0)
     return -1;
   if (buf[0] != Resp_STK_OK) {
-    fprintf(stderr,
-            "%s: stk500_initialize(): (b) protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_OK, buf[0]);
+    avrdude_message("%s: stk500_initialize(): (b) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_OK, buf[0]);
     return -1;
   }
 
   if (n_extparms) {
     if ((p->pagel == 0) || (p->bs2 == 0)) {
       if (verbose > 1)
-          fprintf(stderr,
-                  "%s: PAGEL and BS2 signals not defined in the configuration "
-                  "file for part %s, using dummy values\n",
-                  progname, p->desc);
+          avrdude_message("%s: PAGEL and BS2 signals not defined in the configuration "
+                          "file for part %s, using dummy values\n",
+                          progname, p->desc);
       buf[2] = 0xD7;            /* they look somehow possible, */
       buf[3] = 0xA0;            /* don't they? ;) */
     }
@@ -605,7 +591,7 @@ static int stk500_initialize(PROGRAMMER * pgm, AVRPART * p)
 
     rc = stk500_set_extended_parms(pgm, n_extparms+1, buf);
     if (rc) {
-      fprintf(stderr, "%s: stk500_initialize(): failed\n", progname);
+      avrdude_message("%s: stk500_initialize(): failed\n", progname);
       return -1;
     }
   }
@@ -631,7 +617,7 @@ static void stk500_disable(PROGRAMMER * pgm)
     return;
   if (buf[0] == Resp_STK_NOSYNC) {
     if (tries > 33) {
-      fprintf(stderr, "%s: stk500_disable(): can't get into sync\n",
+      avrdude_message("%s: stk500_disable(): can't get into sync\n",
               progname);
       return;
     }
@@ -640,10 +626,9 @@ static void stk500_disable(PROGRAMMER * pgm)
     goto retry;
   }
   else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-            "%s: stk500_disable(): protocol error, expect=0x%02x, "
-            "resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("%s: stk500_disable(): protocol error, expect=0x%02x, "
+                    "resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return;
   }
 
@@ -653,12 +638,12 @@ static void stk500_disable(PROGRAMMER * pgm)
     return;
   }
   else if (buf[0] == Resp_STK_NODEVICE) {
-    fprintf(stderr, "%s: stk500_disable(): no device\n",
+    avrdude_message("%s: stk500_disable(): no device\n",
             progname);
     return;
   }
 
-  fprintf(stderr, "%s: stk500_disable(): unknown response=0x%02x\n",
+  avrdude_message("%s: stk500_disable(): unknown response=0x%02x\n",
           progname, buf[0]);
 
   return;
@@ -743,7 +728,7 @@ static int stk500_loadaddr(PROGRAMMER * pgm, AVRMEM * mem, unsigned int addr)
     return -1;
   if (buf[0] == Resp_STK_NOSYNC) {
     if (tries > 33) {
-      fprintf(stderr, "%s: stk500_loadaddr(): can't get into sync\n",
+      avrdude_message("%s: stk500_loadaddr(): can't get into sync\n",
               progname);
       return -1;
     }
@@ -752,10 +737,9 @@ static int stk500_loadaddr(PROGRAMMER * pgm, AVRMEM * mem, unsigned int addr)
     goto retry;
   }
   else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-            "%s: stk500_loadaddr(): (a) protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("%s: stk500_loadaddr(): (a) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -1;
   }
 
@@ -765,10 +749,9 @@ static int stk500_loadaddr(PROGRAMMER * pgm, AVRMEM * mem, unsigned int addr)
     return 0;
   }
 
-  fprintf(stderr,
-          "%s: loadaddr(): (b) protocol error, "
-          "expect=0x%02x, resp=0x%02x\n", 
-          progname, Resp_STK_INSYNC, buf[0]);
+  avrdude_message("%s: loadaddr(): (b) protocol error, "
+                  "expect=0x%02x, resp=0x%02x\n",
+                  progname, Resp_STK_INSYNC, buf[0]);
 
   return -1;
 }
@@ -803,12 +786,11 @@ static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
   n = addr + n_bytes;
 #if 0
-  fprintf(stderr, 
-          "n_bytes   = %d\n"
-          "n         = %u\n"
-          "a_div     = %d\n"
-          "page_size = %d\n",
-          n_bytes, n, a_div, page_size);
+  avrdude_message("n_bytes   = %d\n"
+                  "n         = %u\n"
+                  "a_div     = %d\n"
+                  "page_size = %d\n",
+                  n_bytes, n, a_div, page_size);
 #endif     
 
   for (; addr < n; addr += block_size) {
@@ -842,7 +824,7 @@ static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       return -1;
     if (buf[0] == Resp_STK_NOSYNC) {
       if (tries > 33) {
-        fprintf(stderr, "\n%s: stk500_paged_write(): can't get into sync\n",
+        avrdude_message("\n%s: stk500_paged_write(): can't get into sync\n",
                 progname);
         return -3;
       }
@@ -851,20 +833,18 @@ static int stk500_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       goto retry;
     }
     else if (buf[0] != Resp_STK_INSYNC) {
-      fprintf(stderr,
-              "\n%s: stk500_paged_write(): (a) protocol error, "
-              "expect=0x%02x, resp=0x%02x\n", 
-              progname, Resp_STK_INSYNC, buf[0]);
+      avrdude_message("\n%s: stk500_paged_write(): (a) protocol error, "
+                      "expect=0x%02x, resp=0x%02x\n",
+                      progname, Resp_STK_INSYNC, buf[0]);
       return -4;
     }
     
     if (stk500_recv(pgm, buf, 1) < 0)
       return -1;
     if (buf[0] != Resp_STK_OK) {
-      fprintf(stderr,
-              "\n%s: stk500_paged_write(): (a) protocol error, "
-              "expect=0x%02x, resp=0x%02x\n", 
-              progname, Resp_STK_INSYNC, buf[0]);
+      avrdude_message("\n%s: stk500_paged_write(): (a) protocol error, "
+                      "expect=0x%02x, resp=0x%02x\n",
+                      progname, Resp_STK_INSYNC, buf[0]);
       return -5;
     }
   }
@@ -925,7 +905,7 @@ static int stk500_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       return -1;
     if (buf[0] == Resp_STK_NOSYNC) {
       if (tries > 33) {
-        fprintf(stderr, "\n%s: stk500_paged_load(): can't get into sync\n",
+        avrdude_message("\n%s: stk500_paged_load(): can't get into sync\n",
                 progname);
         return -3;
       }
@@ -934,10 +914,9 @@ static int stk500_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
       goto retry;
     }
     else if (buf[0] != Resp_STK_INSYNC) {
-      fprintf(stderr,
-              "\n%s: stk500_paged_load(): (a) protocol error, "
-              "expect=0x%02x, resp=0x%02x\n", 
-              progname, Resp_STK_INSYNC, buf[0]);
+      avrdude_message("\n%s: stk500_paged_load(): (a) protocol error, "
+                      "expect=0x%02x, resp=0x%02x\n",
+                      progname, Resp_STK_INSYNC, buf[0]);
       return -4;
     }
 
@@ -949,19 +928,17 @@ static int stk500_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
     if(strcmp(ldata(lfirst(pgm->id)), "mib510") == 0) {
       if (buf[0] != Resp_STK_INSYNC) {
-      fprintf(stderr,
-              "\n%s: stk500_paged_load(): (a) protocol error, "
-              "expect=0x%02x, resp=0x%02x\n", 
-              progname, Resp_STK_INSYNC, buf[0]);
+      avrdude_message("\n%s: stk500_paged_load(): (a) protocol error, "
+                      "expect=0x%02x, resp=0x%02x\n",
+                      progname, Resp_STK_INSYNC, buf[0]);
       return -5;
     }
   }
     else {
       if (buf[0] != Resp_STK_OK) {
-        fprintf(stderr,
-                "\n%s: stk500_paged_load(): (a) protocol error, "
-                "expect=0x%02x, resp=0x%02x\n",
-                progname, Resp_STK_OK, buf[0]);
+        avrdude_message("\n%s: stk500_paged_load(): (a) protocol error, "
+                        "expect=0x%02x, resp=0x%02x\n",
+                        progname, Resp_STK_OK, buf[0]);
         return -5;
       }
     }
@@ -978,16 +955,14 @@ static int stk500_set_vtarget(PROGRAMMER * pgm, double v)
   utarg = (unsigned)((v + 0.049) * 10);
 
   if (stk500_getparm(pgm, Parm_STK_VADJUST, &uaref) != 0) {
-    fprintf(stderr,
-	    "%s: stk500_set_vtarget(): cannot obtain V[aref]\n",
-	    progname);
+    avrdude_message("%s: stk500_set_vtarget(): cannot obtain V[aref]\n",
+                    progname);
     return -1;
   }
 
   if (uaref > utarg) {
-    fprintf(stderr,
-	    "%s: stk500_set_vtarget(): reducing V[aref] from %.1f to %.1f\n",
-	    progname, uaref / 10.0, v);
+    avrdude_message("%s: stk500_set_vtarget(): reducing V[aref] from %.1f to %.1f\n",
+                    progname, uaref / 10.0, v);
     if (stk500_setparm(pgm, Parm_STK_VADJUST, utarg)
 	!= 0)
       return -1;
@@ -1004,17 +979,15 @@ static int stk500_set_varef(PROGRAMMER * pgm, unsigned int chan /* unused */,
   uaref = (unsigned)((v + 0.049) * 10);
 
   if (stk500_getparm(pgm, Parm_STK_VTARGET, &utarg) != 0) {
-    fprintf(stderr,
-	    "%s: stk500_set_varef(): cannot obtain V[target]\n",
-	    progname);
+    avrdude_message("%s: stk500_set_varef(): cannot obtain V[target]\n",
+                    progname);
     return -1;
   }
 
   if (uaref > utarg) {
-    fprintf(stderr,
-	    "%s: stk500_set_varef(): V[aref] must not be greater than "
-	    "V[target] = %.1f\n",
-	    progname, utarg / 10.0);
+    avrdude_message("%s: stk500_set_varef(): V[aref] must not be greater than "
+                    "V[target] = %.1f\n",
+                    progname, utarg / 10.0);
     return -1;
   }
   return stk500_setparm(pgm, Parm_STK_VADJUST, uaref);
@@ -1041,9 +1014,8 @@ static int stk500_set_fosc(PROGRAMMER * pgm, double v)
         unit = "kHz";
       } else
         unit = "Hz";
-      fprintf(stderr,
-          "%s: stk500_set_fosc(): f = %.3f %s too high, using %.3f MHz\n",
-          progname, v, unit, STK500_XTAL / 2e6);
+      avrdude_message("%s: stk500_set_fosc(): f = %.3f %s too high, using %.3f MHz\n",
+                      progname, v, unit, STK500_XTAL / 2e6);
       fosc = STK500_XTAL / 2;
     } else
       fosc = (unsigned)v;
@@ -1057,7 +1029,7 @@ static int stk500_set_fosc(PROGRAMMER * pgm, double v)
       }
     }
     if (idx == sizeof(ps) / sizeof(ps[0])) {
-      fprintf(stderr, "%s: stk500_set_fosc(): f = %u Hz too low, %u Hz min\n",
+      avrdude_message("%s: stk500_set_fosc(): f = %u Hz too low, %u Hz min\n",
           progname, fosc, STK500_XTAL / (256 * 1024 * 2));
       return -1;
     }
@@ -1089,14 +1061,12 @@ static int stk500_set_sck_period(PROGRAMMER * pgm, double v)
   
   if (v < min) {
       dur = 1;
-      fprintf(stderr,
-	      "%s: stk500_set_sck_period(): p = %.1f us too small, using %.1f us\n",
-	      progname, v / 1e-6, dur * min / 1e-6);
+      avrdude_message("%s: stk500_set_sck_period(): p = %.1f us too small, using %.1f us\n",
+                      progname, v / 1e-6, dur * min / 1e-6);
   } else if (v > max) {
       dur = 255;
-      fprintf(stderr,
-	      "%s: stk500_set_sck_period(): p = %.1f us too large, using %.1f us\n",
-	      progname, v / 1e-6, dur * min / 1e-6);
+      avrdude_message("%s: stk500_set_sck_period(): p = %.1f us too large, using %.1f us\n",
+                      progname, v / 1e-6, dur * min / 1e-6);
   }
   
   return stk500_setparm(pgm, Parm_STK_SCK_DURATION, dur);
@@ -1121,7 +1091,7 @@ static int stk500_getparm(PROGRAMMER * pgm, unsigned parm, unsigned * value)
     return -1;
   if (buf[0] == Resp_STK_NOSYNC) {
     if (tries > 33) {
-      fprintf(stderr, "\n%s: stk500_getparm(): can't get into sync\n",
+      avrdude_message("\n%s: stk500_getparm(): can't get into sync\n",
               progname);
       return -1;
     }
@@ -1130,10 +1100,9 @@ static int stk500_getparm(PROGRAMMER * pgm, unsigned parm, unsigned * value)
     goto retry;
   }
   else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-            "\n%s: stk500_getparm(): (a) protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("\n%s: stk500_getparm(): (a) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -2;
   }
 
@@ -1144,16 +1113,14 @@ static int stk500_getparm(PROGRAMMER * pgm, unsigned parm, unsigned * value)
   if (stk500_recv(pgm, buf, 1) < 0)
     return -1;
   if (buf[0] == Resp_STK_FAILED) {
-    fprintf(stderr,
-            "\n%s: stk500_getparm(): parameter 0x%02x failed\n",
-            progname, v);
+    avrdude_message("\n%s: stk500_getparm(): parameter 0x%02x failed\n",
+                    progname, v);
     return -3;
   }
   else if (buf[0] != Resp_STK_OK) {
-    fprintf(stderr,
-            "\n%s: stk500_getparm(): (a) protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("\n%s: stk500_getparm(): (a) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -3;
   }
 
@@ -1181,7 +1148,7 @@ static int stk500_setparm(PROGRAMMER * pgm, unsigned parm, unsigned value)
     return -1;
   if (buf[0] == Resp_STK_NOSYNC) {
     if (tries > 33) {
-      fprintf(stderr, "\n%s: stk500_setparm(): can't get into sync\n",
+      avrdude_message("\n%s: stk500_setparm(): can't get into sync\n",
               progname);
       return -1;
     }
@@ -1190,10 +1157,9 @@ static int stk500_setparm(PROGRAMMER * pgm, unsigned parm, unsigned value)
     goto retry;
   }
   else if (buf[0] != Resp_STK_INSYNC) {
-    fprintf(stderr,
-            "\n%s: stk500_setparm(): (a) protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("\n%s: stk500_setparm(): (a) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -2;
   }
 
@@ -1206,16 +1172,14 @@ static int stk500_setparm(PROGRAMMER * pgm, unsigned parm, unsigned value)
   if (stk500_recv(pgm, buf, 1) < 0)
     return -1;
   if (buf[0] == Resp_STK_FAILED) {
-    fprintf(stderr,
-            "\n%s: stk500_setparm(): parameter 0x%02x failed\n",
-            progname, parm);
+    avrdude_message("\n%s: stk500_setparm(): parameter 0x%02x failed\n",
+                    progname, parm);
     return -3;
   }
   else {
-    fprintf(stderr,
-            "\n%s: stk500_setparm(): (a) protocol error, "
-            "expect=0x%02x, resp=0x%02x\n", 
-            progname, Resp_STK_INSYNC, buf[0]);
+    avrdude_message("\n%s: stk500_setparm(): (a) protocol error, "
+                    "expect=0x%02x, resp=0x%02x\n",
+                    progname, Resp_STK_INSYNC, buf[0]);
     return -3;
   }
 }
@@ -1230,8 +1194,8 @@ static void stk500_display(PROGRAMMER * pgm, const char * p)
   stk500_getparm(pgm, Parm_STK_SW_MINOR, &min);
   stk500_getparm(pgm, Param_STK500_TOPCARD_DETECT, &topcard);
 
-  fprintf(stderr, "%sHardware Version: %d\n", p, hdw);
-  fprintf(stderr, "%sFirmware Version: %d.%d\n", p, maj, min);
+  avrdude_message("%sHardware Version: %d\n", p, hdw);
+  avrdude_message("%sFirmware Version: %d.%d\n", p, maj, min);
   if (topcard < 3) {
     const char *n = "Unknown";
 
@@ -1244,7 +1208,7 @@ static void stk500_display(PROGRAMMER * pgm, const char * p)
 	n = "STK501";
 	break;
     }
-    fprintf(stderr, "%sTopcard         : %s\n", p, n);
+    avrdude_message("%sTopcard         : %s\n", p, n);
   }
   stk500_print_parms1(pgm, p);
 
@@ -1262,11 +1226,11 @@ static void stk500_print_parms1(PROGRAMMER * pgm, const char * p)
   stk500_getparm(pgm, Parm_STK_OSC_CMATCH, &osc_cmatch);
   stk500_getparm(pgm, Parm_STK_SCK_DURATION, &sck_duration);
 
-  fprintf(stderr, "%sVtarget         : %.1f V\n", p, vtarget / 10.0);
-  fprintf(stderr, "%sVaref           : %.1f V\n", p, vadjust / 10.0);
-  fprintf(stderr, "%sOscillator      : ", p);
+  avrdude_message("%sVtarget         : %.1f V\n", p, vtarget / 10.0);
+  avrdude_message("%sVaref           : %.1f V\n", p, vadjust / 10.0);
+  avrdude_message("%sOscillator      : ", p);
   if (osc_pscale == 0)
-    fprintf(stderr, "Off\n");
+    avrdude_message("Off\n");
   else {
     int prescale = 1;
     double f = STK500_XTAL / 2;
@@ -1290,9 +1254,9 @@ static void stk500_print_parms1(PROGRAMMER * pgm, const char * p)
       unit = "kHz";
     } else
       unit = "Hz";
-    fprintf(stderr, "%.3f %s\n", f, unit);
+    avrdude_message("%.3f %s\n", f, unit);
   }
-  fprintf(stderr, "%sSCK period      : %.1f us\n", p, 
+  avrdude_message("%sSCK period      : %.1f us\n", p,
 	  sck_duration * 8.0e6 / STK500_XTAL + 0.05);
 
   return;
@@ -1307,9 +1271,8 @@ static void stk500_print_parms(PROGRAMMER * pgm)
 static void stk500_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: stk500_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: stk500_setup(): Out of memory allocating private data\n",
+                    progname);
     return;
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
diff --git a/stk500generic.c b/stk500generic.c
index 2cd3db71..7bfc3262 100644
--- a/stk500generic.c
+++ b/stk500generic.c
@@ -42,9 +42,8 @@ static int stk500generic_open(PROGRAMMER * pgm, char * port)
   stk500_initpgm(pgm);
   if (pgm->open(pgm, port) >= 0)
     {
-      fprintf(stderr,
-	      "%s: successfully opened stk500v1 device -- please use -c stk500v1\n",
-	      progname);
+      avrdude_message("%s: successfully opened stk500v1 device -- please use -c stk500v1\n",
+                      progname);
       return 0;
     }
 
@@ -53,15 +52,13 @@ static int stk500generic_open(PROGRAMMER * pgm, char * port)
   stk500v2_initpgm(pgm);
   if (pgm->open(pgm, port) >= 0)
     {
-      fprintf(stderr,
-	      "%s: successfully opened stk500v2 device -- please use -c stk500v2\n",
-	      progname);
+      avrdude_message("%s: successfully opened stk500v2 device -- please use -c stk500v2\n",
+                      progname);
       return 0;
     }
 
-  fprintf(stderr,
-	  "%s: cannot open either stk500v1 or stk500v2 programmer\n",
-	  progname);
+  avrdude_message("%s: cannot open either stk500v1 or stk500v2 programmer\n",
+                  progname);
   return -1;
 }
 
diff --git a/stk500v2.c b/stk500v2.c
index 23210c02..ec0a8f0b 100644
--- a/stk500v2.c
+++ b/stk500v2.c
@@ -80,13 +80,13 @@
 #define RETRIES 5
 
 #if 0
-#define DEBUG(...) fprintf(stderr, __VA_ARGS__)
+#define DEBUG(...) avrdude_message(__VA_ARGS__)
 #else
 #define DEBUG(...)
 #endif
 
 #if 0
-#define DEBUGRECV(...) fprintf(stderr, __VA_ARGS__)
+#define DEBUGRECV(...) avrdude_message(__VA_ARGS__)
 #else
 #define DEBUGRECV(...)
 #endif
@@ -293,9 +293,8 @@ static int stk600_xprog_program_enable(PROGRAMMER * pgm, AVRPART * p);
 void stk500v2_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: stk500v2_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: stk500v2_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -308,9 +307,8 @@ static void stk500v2_jtagmkII_setup(PROGRAMMER * pgm)
   void *mycookie, *theircookie;
 
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: stk500v2_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: stk500v2_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -332,9 +330,8 @@ static void stk500v2_jtag3_setup(PROGRAMMER * pgm)
   void *mycookie, *theircookie;
 
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: stk500v2_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: stk500v2_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -392,7 +389,7 @@ b2_to_u16(unsigned char *b)
 static int stk500v2_send_mk2(PROGRAMMER * pgm, unsigned char * data, size_t len)
 {
   if (serial_send(&pgm->fd, data, len) != 0) {
-    fprintf(stderr,"%s: stk500_send_mk2(): failed to send command to serial port\n",progname);
+    avrdude_message("%s: stk500_send_mk2(): failed to send command to serial port\n",progname);
     return -1;
   }
 
@@ -425,7 +422,7 @@ static int stk500v2_jtagmkII_send(PROGRAMMER * pgm, unsigned char * data, size_t
 
   sz = get_jtagisp_return_size(data[0]);
   if (sz == 0) {
-    fprintf(stderr, "%s: unsupported encapsulated ISP command: %#x\n",
+    avrdude_message("%s: unsupported encapsulated ISP command: %#x\n",
 	    progname, data[0]);
     return -1;
   }
@@ -445,7 +442,7 @@ static int stk500v2_jtagmkII_send(PROGRAMMER * pgm, unsigned char * data, size_t
   }
 
   if ((cmdbuf = malloc(len + 3)) == NULL) {
-    fprintf(stderr, "%s: out of memory for command packet\n",
+    avrdude_message("%s: out of memory for command packet\n",
             progname);
     exit(1);
   }
@@ -472,7 +469,7 @@ static int stk500v2_jtag3_send(PROGRAMMER * pgm, unsigned char * data, size_t le
   void *mycookie;
 
   if ((cmdbuf = malloc(len + 1)) == NULL) {
-    fprintf(stderr, "%s: out of memory for command packet\n",
+    avrdude_message("%s: out of memory for command packet\n",
             progname);
     exit(1);
   }
@@ -517,7 +514,7 @@ static int stk500v2_send(PROGRAMMER * pgm, unsigned char * data, size_t len)
   DEBUG(", %d)\n",len+6);
 
   if (serial_send(&pgm->fd, buf, len+6) != 0) {
-    fprintf(stderr,"%s: stk500_send(): failed to send command to serial port\n",progname);
+    avrdude_message("%s: stk500_send(): failed to send command to serial port\n",progname);
     return -1;
   }
 
@@ -537,7 +534,7 @@ static int stk500v2_recv_mk2(PROGRAMMER * pgm, unsigned char *msg,
 
   rv = serial_recv(&pgm->fd, msg, maxsize);
   if (rv < 0) {
-    fprintf(stderr, "%s: stk500v2_recv_mk2: error in USB receive\n", progname);
+    avrdude_message("%s: stk500v2_recv_mk2: error in USB receive\n", progname);
     return -1;
   }
 
@@ -556,29 +553,28 @@ static int stk500v2_jtagmkII_recv(PROGRAMMER * pgm, unsigned char *msg,
   rv = jtagmkII_recv(pgm, &jtagmsg);
   pgm->cookie = mycookie;
   if (rv <= 0) {
-    fprintf(stderr, "%s: stk500v2_jtagmkII_recv(): error in jtagmkII_recv()\n",
+    avrdude_message("%s: stk500v2_jtagmkII_recv(): error in jtagmkII_recv()\n",
             progname);
     return -1;
   }
   if (rv - 1 > maxsize) {
-    fprintf(stderr,
-            "%s: stk500v2_jtagmkII_recv(): got %u bytes, have only room for %u bytes\n",
-            progname, (unsigned)rv - 1, (unsigned)maxsize);
+    avrdude_message("%s: stk500v2_jtagmkII_recv(): got %u bytes, have only room for %u bytes\n",
+                    progname, (unsigned)rv - 1, (unsigned)maxsize);
     rv = maxsize;
   }
   switch (jtagmsg[0]) {
   case RSP_SPI_DATA:
     break;
   case RSP_FAILED:
-    fprintf(stderr, "%s: stk500v2_jtagmkII_recv(): failed\n",
+    avrdude_message("%s: stk500v2_jtagmkII_recv(): failed\n",
 	    progname);
     return -1;
   case RSP_ILLEGAL_MCU_STATE:
-    fprintf(stderr, "%s: stk500v2_jtagmkII_recv(): illegal MCU state\n",
+    avrdude_message("%s: stk500v2_jtagmkII_recv(): illegal MCU state\n",
 	    progname);
     return -1;
   default:
-    fprintf(stderr, "%s: stk500v2_jtagmkII_recv(): unknown status %d\n",
+    avrdude_message("%s: stk500v2_jtagmkII_recv(): unknown status %d\n",
 	    progname, jtagmsg[0]);
     return -1;
   }
@@ -598,7 +594,7 @@ static int stk500v2_jtag3_recv(PROGRAMMER * pgm, unsigned char *msg,
   rv = jtag3_recv(pgm, &jtagmsg);
   pgm->cookie = mycookie;
   if (rv <= 0) {
-    fprintf(stderr, "%s: stk500v2_jtag3_recv(): error in jtagmkII_recv()\n",
+    avrdude_message("%s: stk500v2_jtag3_recv(): error in jtagmkII_recv()\n",
             progname);
     return -1;
   }
@@ -608,15 +604,13 @@ static int stk500v2_jtag3_recv(PROGRAMMER * pgm, unsigned char *msg,
      levels. */
   if (rv - 1 > maxsize) {
     if (verbose > 2)
-      fprintf(stderr,
-            "%s: stk500v2_jtag3_recv(): got %u bytes, have only room for %u bytes\n",
-            progname, (unsigned)rv - 1, (unsigned)maxsize);
+      avrdude_message("%s: stk500v2_jtag3_recv(): got %u bytes, have only room for %u bytes\n",
+                      progname, (unsigned)rv - 1, (unsigned)maxsize);
     rv = maxsize;
   }
   if (jtagmsg[0] != SCOPE_AVR_ISP) {
-    fprintf(stderr,
-	    "%s: stk500v2_jtag3_recv(): message is not AVR ISP: 0x%02x\n",
-	    progname, jtagmsg[0]);
+    avrdude_message("%s: stk500v2_jtag3_recv(): message is not AVR ISP: 0x%02x\n",
+                    progname, jtagmsg[0]);
     free(jtagmsg);
     return -1;
   }
@@ -695,12 +689,12 @@ static int stk500v2_recv(PROGRAMMER * pgm, unsigned char *msg, size_t maxsize) {
         if (curlen < maxsize) {
           msg[curlen] = c;
         } else {
-          fprintf(stderr, "%s: stk500v2_recv(): buffer too small, received %d byte into %u byte buffer\n",
+          avrdude_message("%s: stk500v2_recv(): buffer too small, received %d byte into %u byte buffer\n",
                   progname,curlen,(unsigned int)maxsize);
           return -2;
         }
         if ((curlen == 0) && (msg[0] == ANSWER_CKSUM_ERROR)) {
-          fprintf(stderr, "%s: stk500v2_recv(): previous packet sent with wrong checksum\n",
+          avrdude_message("%s: stk500v2_recv(): previous packet sent with wrong checksum\n",
                   progname);
           return -3;
         }
@@ -712,13 +706,13 @@ static int stk500v2_recv(PROGRAMMER * pgm, unsigned char *msg, size_t maxsize) {
           state = sDONE;
         } else {
           state = sSTART;
-          fprintf(stderr, "%s: stk500v2_recv(): checksum error\n",
+          avrdude_message("%s: stk500v2_recv(): checksum error\n",
                   progname);
           return -4;
         }
         break;
       default:
-        fprintf(stderr, "%s: stk500v2_recv(): unknown state\n",
+        avrdude_message("%s: stk500v2_recv(): unknown state\n",
                 progname);
         return -5;
      } /* switch */
@@ -727,7 +721,7 @@ static int stk500v2_recv(PROGRAMMER * pgm, unsigned char *msg, size_t maxsize) {
      tnow = tv.tv_sec;
      if (tnow-tstart > timeoutval) {			// wuff - signed/unsigned/overflow
       timedout:
-       fprintf(stderr, "%s: stk500v2_ReceiveMessage(): timeout\n",
+       avrdude_message("%s: stk500v2_ReceiveMessage(): timeout\n",
                progname);
        return -1;
      }
@@ -782,22 +776,19 @@ retry:
       } else {
 	resp[siglen + 3] = 0;
 	if (verbose)
-	  fprintf(stderr,
-		  "%s: stk500v2_getsync(): got response from unknown "
-		  "programmer %s, assuming STK500\n",
-		  progname, resp + 3);
+	  avrdude_message("%s: stk500v2_getsync(): got response from unknown "
+                          "programmer %s, assuming STK500\n",
+                          progname, resp + 3);
 	PDATA(pgm)->pgmtype = PGMTYPE_STK500;
       }
       if (verbose >= 3)
-	fprintf(stderr,
-		"%s: stk500v2_getsync(): found %s programmer\n",
-		progname, pgmname[PDATA(pgm)->pgmtype]);
+	avrdude_message("%s: stk500v2_getsync(): found %s programmer\n",
+                        progname, pgmname[PDATA(pgm)->pgmtype]);
       return 0;
     } else {
       if (tries > RETRIES) {
-        fprintf(stderr,
-                "%s: stk500v2_getsync(): can't communicate with device: resp=0x%02x\n",
-                progname, resp[0]);
+        avrdude_message("%s: stk500v2_getsync(): can't communicate with device: resp=0x%02x\n",
+                        progname, resp[0]);
         return -6;
       } else
         goto retry;
@@ -806,7 +797,7 @@ retry:
   // or if we got a timeout
   } else if (status == -1) {
     if (tries > RETRIES) {
-      fprintf(stderr,"%s: stk500v2_getsync(): timeout communicating with programmer\n",
+      avrdude_message("%s: stk500v2_getsync(): timeout communicating with programmer\n",
               progname);
       return -1;
     } else
@@ -815,7 +806,7 @@ retry:
   // or any other error
   } else {
     if (tries > RETRIES) {
-      fprintf(stderr,"%s: stk500v2_getsync(): error communicating with programmer: (%d)\n",
+      avrdude_message("%s: stk500v2_getsync(): error communicating with programmer: (%d)\n",
               progname,status);
     } else
       goto retry;
@@ -846,7 +837,7 @@ retry:
   if (status > 0) {
     DEBUG(" = %d\n",status);
     if (status < 2) {
-      fprintf(stderr, "%s: stk500v2_command(): short reply\n", progname);
+      avrdude_message("%s: stk500v2_command(): short reply\n", progname);
       return -1;
     }
     if (buf[0] == CMD_XPROG_SETMODE || buf[0] == CMD_XPROG) {
@@ -870,7 +861,7 @@ retry:
             case XPRG_ERR_TIMEOUT:  msg = "Timeout"; break;
             default:                msg = "Unknown"; break;
             }
-            fprintf(stderr, "%s: stk500v2_command(): error in %s: %s\n",
+            avrdude_message("%s: stk500v2_command(): error in %s: %s\n",
                     progname,
                     (buf[0] == CMD_XPROG_SETMODE? "CMD_XPROG_SETMODE": "CMD_XPROG"),
                     msg);
@@ -903,21 +894,19 @@ retry:
                 break;
             }
             if (quell_progress < 2) {
-                fprintf(stderr, "%s: stk500v2_command(): warning: %s\n",
+                avrdude_message("%s: stk500v2_command(): warning: %s\n",
                         progname, msg);
             }
         } else if (buf[1] == STATUS_CMD_OK) {
             return status;
         } else if (buf[1] == STATUS_CMD_FAILED) {
-            fprintf(stderr,
-                    "%s: stk500v2_command(): command failed\n",
-                    progname);
+            avrdude_message("%s: stk500v2_command(): command failed\n",
+                            progname);
         } else if (buf[1] == STATUS_CMD_UNKNOWN) {
-            fprintf(stderr,
-                    "%s: stk500v2_command(): unknown command\n",
-                    progname);
+            avrdude_message("%s: stk500v2_command(): unknown command\n",
+                            progname);
         } else {
-            fprintf(stderr, "%s: stk500v2_command(): unknown status 0x%02x\n",
+            avrdude_message("%s: stk500v2_command(): unknown status 0x%02x\n",
                     progname, buf[1]);
         }
         return -1;
@@ -928,7 +917,7 @@ retry:
   status = stk500v2_getsync(pgm);
   if (status != 0) {
     if (tries > RETRIES) {
-      fprintf(stderr,"%s: stk500v2_command(): failed miserably to execute command 0x%02x\n",
+      avrdude_message("%s: stk500v2_command(): failed miserably to execute command 0x%02x\n",
               progname,buf[0]);
       return -1;
     } else
@@ -958,11 +947,11 @@ static int stk500v2_cmd(PROGRAMMER * pgm, const unsigned char *cmd,
 
   result = stk500v2_command(pgm, buf, 8, sizeof(buf));
   if (result < 0) {
-    fprintf(stderr, "%s: stk500v2_cmd(): failed to send command\n",
+    avrdude_message("%s: stk500v2_cmd(): failed to send command\n",
             progname);
     return -1;
   } else if (result < 6) {
-    fprintf(stderr, "%s: stk500v2_cmd(): short reply, len = %d\n",
+    avrdude_message("%s: stk500v2_cmd(): short reply, len = %d\n",
             progname, result);
     return -1;
   }
@@ -979,9 +968,8 @@ static int stk500v2_cmd(PROGRAMMER * pgm, const unsigned char *cmd,
 static int stk500v2_jtag3_cmd(PROGRAMMER * pgm, const unsigned char *cmd,
 			      unsigned char *res)
 {
-  fprintf(stderr,
-	  "%s: stk500v2_jtag3_cmd(): Not available in JTAGICE3\n",
-	  progname);
+  avrdude_message("%s: stk500v2_jtag3_cmd(): Not available in JTAGICE3\n",
+                  progname);
 
   return -1;
 }
@@ -996,7 +984,7 @@ static int stk500v2_chip_erase(PROGRAMMER * pgm, AVRPART * p)
   unsigned char buf[16];
 
   if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
-    fprintf(stderr, "%s: stk500v2_chip_erase: chip erase instruction not defined for part \"%s\"\n",
+    avrdude_message("%s: stk500v2_chip_erase: chip erase instruction not defined for part \"%s\"\n",
             progname, p->desc);
     return -1;
   }
@@ -1116,7 +1104,7 @@ static int stk500v2_program_enable(PROGRAMMER * pgm, AVRPART * p)
   PDATA(pgm)->lastpart = p;
 
   if (p->op[AVR_OP_PGM_ENABLE] == NULL) {
-    fprintf(stderr, "%s: stk500v2_program_enable(): program enable instruction not defined for part \"%s\"\n",
+    avrdude_message("%s: stk500v2_program_enable(): program enable instruction not defined for part \"%s\"\n",
 	    progname, p->desc);
     return -1;
   }
@@ -1147,12 +1135,11 @@ retry:
     case PGMTYPE_STK600:
     case PGMTYPE_AVRISP_MKII:
         if (stk500v2_getparm(pgm, PARAM_STATUS_TGT_CONN, &buf[0]) != 0) {
-            fprintf(stderr,
-                    "%s: stk500v2_program_enable(): cannot get connection status\n",
-                    progname);
+            avrdude_message("%s: stk500v2_program_enable(): cannot get connection status\n",
+                            progname);
         } else {
             stk500v2_translate_conn_status(buf[0], msg);
-            fprintf(stderr, "%s: stk500v2_program_enable():"
+            avrdude_message("%s: stk500v2_program_enable():"
                     " bad AVRISPmkII connection status: %s\n",
                     progname, msg);
         }
@@ -1166,9 +1153,8 @@ retry:
 
             /* Try debugWIRE, and MONCON_DISABLE */
             if (verbose >= 2)
-                fprintf(stderr,
-                        "%s: No response in ISP mode, trying debugWIRE\n",
-                        progname);
+                avrdude_message("%s: No response in ISP mode, trying debugWIRE\n",
+                                progname);
 
             mycookie = pgm->cookie;
             pgm->cookie = PDATA(pgm)->chained_pdata;
@@ -1197,15 +1183,13 @@ retry:
             }
             pgm->cookie = mycookie;
             if (tries++ > 3) {
-                fprintf(stderr,
-                        "%s: Failed to return from debugWIRE to ISP.\n",
-                        progname);
+                avrdude_message("%s: Failed to return from debugWIRE to ISP.\n",
+                                progname);
                 break;
             }
-            fprintf(stderr,
-                    "%s: Target prepared for ISP, signed off.\n"
-                    "%s: Now retrying without power-cycling the target.\n",
-                    progname, progname);
+            avrdude_message("%s: Target prepared for ISP, signed off.\n"
+                            "%s: Now retrying without power-cycling the target.\n",
+                            progname, progname);
             goto retry;
         }
         break;
@@ -1287,9 +1271,8 @@ static int stk500v2_initialize(PROGRAMMER * pgm, AVRPART * p)
       AVRMEM *bootmem = avr_locate_mem(p, "boot");
       AVRMEM *flashmem = avr_locate_mem(p, "flash");
       if (bootmem == NULL || flashmem == NULL) {
-        fprintf(stderr,
-                "%s: stk500v2_initialize(): Cannot locate \"flash\" and \"boot\" memories in description\n",
-                progname);
+        avrdude_message("%s: stk500v2_initialize(): Cannot locate \"flash\" and \"boot\" memories in description\n",
+                        progname);
       } else {
         PDATA(pgm)->boot_start = bootmem->offset - flashmem->offset;
       }
@@ -1324,7 +1307,7 @@ static int stk500v2_jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
 
   if ((p->flags & AVRPART_HAS_PDI) ||
       (p->flags & AVRPART_HAS_TPI)) {
-    fprintf(stderr, "%s: jtag3_initialize(): part %s has no ISP interface\n",
+    avrdude_message("%s: jtag3_initialize(): part %s has no ISP interface\n",
 	    progname, p->desc);
     return -1;
   }
@@ -1386,12 +1369,12 @@ static int stk500v2_jtag3_initialize(PROGRAMMER * pgm, AVRPART * p)
   free(PDATA(pgm)->flash_pagecache);
   free(PDATA(pgm)->eeprom_pagecache);
   if ((PDATA(pgm)->flash_pagecache = malloc(PDATA(pgm)->flash_pagesize)) == NULL) {
-    fprintf(stderr, "%s: stk500hv_initialize(): Out of memory\n",
+    avrdude_message("%s: stk500hv_initialize(): Out of memory\n",
 	    progname);
     return -1;
   }
   if ((PDATA(pgm)->eeprom_pagecache = malloc(PDATA(pgm)->eeprom_pagesize)) == NULL) {
-    fprintf(stderr, "%s: stk500hv_initialize(): Out of memory\n",
+    avrdude_message("%s: stk500hv_initialize(): Out of memory\n",
 	    progname);
     free(PDATA(pgm)->flash_pagecache);
     return -1;
@@ -1413,12 +1396,11 @@ static int stk500hv_initialize(PROGRAMMER * pgm, AVRPART * p, enum hvmode mode)
   AVRMEM * m;
 
   if (p->ctl_stack_type != (mode == PPMODE? CTL_STACK_PP: CTL_STACK_HVSP)) {
-    fprintf(stderr,
-	    "%s: stk500hv_initialize(): "
-	    "%s programming control stack not defined for part \"%s\"\n",
-            progname,
-	    (mode == PPMODE? "parallel": "high-voltage serial"),
-	    p->desc);
+    avrdude_message("%s: stk500hv_initialize(): "
+                    "%s programming control stack not defined for part \"%s\"\n",
+                    progname,
+                    (mode == PPMODE? "parallel": "high-voltage serial"),
+                    p->desc);
     return -1;
   }
 
@@ -1428,10 +1410,9 @@ static int stk500hv_initialize(PROGRAMMER * pgm, AVRPART * p, enum hvmode mode)
   result = stk500v2_command(pgm, buf, CTL_STACK_SIZE + 1, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-	    "%s: stk500hv_initalize(): "
-	    "failed to set control stack\n",
-            progname);
+    avrdude_message("%s: stk500hv_initalize(): "
+                    "failed to set control stack\n",
+                    progname);
     return -1;
   }
 
@@ -1459,12 +1440,12 @@ static int stk500hv_initialize(PROGRAMMER * pgm, AVRPART * p, enum hvmode mode)
   free(PDATA(pgm)->flash_pagecache);
   free(PDATA(pgm)->eeprom_pagecache);
   if ((PDATA(pgm)->flash_pagecache = malloc(PDATA(pgm)->flash_pagesize)) == NULL) {
-    fprintf(stderr, "%s: stk500hv_initialize(): Out of memory\n",
+    avrdude_message("%s: stk500hv_initialize(): Out of memory\n",
 	    progname);
     return -1;
   }
   if ((PDATA(pgm)->eeprom_pagecache = malloc(PDATA(pgm)->eeprom_pagesize)) == NULL) {
-    fprintf(stderr, "%s: stk500hv_initialize(): Out of memory\n",
+    avrdude_message("%s: stk500hv_initialize(): Out of memory\n",
 	    progname);
     free(PDATA(pgm)->flash_pagecache);
     return -1;
@@ -1507,9 +1488,8 @@ static void stk500v2_jtag3_disable(PROGRAMMER * pgm)
   result = stk500v2_command(pgm, buf, 3, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-            "%s: stk500v2_disable(): failed to leave programming mode\n",
-            progname);
+    avrdude_message("%s: stk500v2_disable(): failed to leave programming mode\n",
+                    progname);
   }
 
   return;
@@ -1527,9 +1507,8 @@ static void stk500v2_disable(PROGRAMMER * pgm)
   result = stk500v2_command(pgm, buf, 3, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-            "%s: stk500v2_disable(): failed to leave programming mode\n",
-            progname);
+    avrdude_message("%s: stk500v2_disable(): failed to leave programming mode\n",
+                    progname);
   }
 
   return;
@@ -1558,10 +1537,9 @@ static void stk500hv_disable(PROGRAMMER * pgm, enum hvmode mode)
   result = stk500v2_command(pgm, buf, 3, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-	    "%s: stk500hv_disable(): "
-	    "failed to leave programming mode\n",
-            progname);
+    avrdude_message("%s: stk500hv_disable(): "
+                    "failed to leave programming mode\n",
+                    progname);
   }
 
   return;
@@ -1605,7 +1583,7 @@ static int stk500v2_open(PROGRAMMER * pgm, char * port)
     serdev = &avrdoper_serdev;
     PDATA(pgm)->pgmtype = PGMTYPE_STK500;
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1629,7 +1607,7 @@ static int stk500v2_open(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1687,7 +1665,7 @@ static int stk600_open(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_STK600;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -1740,9 +1718,8 @@ static int stk500v2_loadaddr(PROGRAMMER * pgm, unsigned int addr)
   result = stk500v2_command(pgm, buf, 5, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-            "%s: stk500v2_loadaddr(): failed to set load address\n",
-            progname);
+    avrdude_message("%s: stk500v2_loadaddr(): failed to set load address\n",
+                    progname);
     return -1;
   }
 
@@ -1764,7 +1741,7 @@ static int stk500hv_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   unsigned char *cache_ptr = NULL;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500hv_read_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: stk500hv_read_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   if (strcmp(mem->desc, "flash") == 0) {
@@ -1838,16 +1815,15 @@ static int stk500hv_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   }
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500hv_read_byte(): Sending read memory command: ",
+    avrdude_message("%s: stk500hv_read_byte(): Sending read memory command: ",
 	    progname);
 
   result = stk500v2_command(pgm, buf, cmdlen, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-	    "%s: stk500hv_read_byte(): "
-	    "timeout/error communicating with programmer\n",
-	    progname);
+    avrdude_message("%s: stk500hv_read_byte(): "
+                    "timeout/error communicating with programmer\n",
+                    progname);
     return -1;
   }
 
@@ -1897,7 +1873,7 @@ static int stk500isp_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   OPCODE *op;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500isp_read_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: stk500isp_read_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   if (strcmp(mem->desc, "flash") == 0 ||
@@ -1952,32 +1928,29 @@ static int stk500isp_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 
   memset(buf + 1, 0, 5);
   if ((op = mem->op[AVR_OP_READ]) == NULL) {
-    fprintf(stderr,
-	    "%s: stk500isp_read_byte(): invalid operation AVR_OP_READ on %s memory\n",
-	    progname, mem->desc);
+    avrdude_message("%s: stk500isp_read_byte(): invalid operation AVR_OP_READ on %s memory\n",
+                    progname, mem->desc);
     return -1;
   }
   avr_set_bits(op, buf + 2);
   if ((pollidx = avr_get_output_index(op)) == -1) {
-    fprintf(stderr,
-	    "%s: stk500isp_read_byte(): cannot determine pollidx to read %s memory\n",
-	    progname, mem->desc);
+    avrdude_message("%s: stk500isp_read_byte(): cannot determine pollidx to read %s memory\n",
+                    progname, mem->desc);
     pollidx = 3;
   }
   buf[1] = pollidx + 1;
   avr_set_addr(op, buf + 2, addr);
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500isp_read_byte(): Sending read memory command: ",
+    avrdude_message("%s: stk500isp_read_byte(): Sending read memory command: ",
 	    progname);
 
   result = stk500v2_command(pgm, buf, 6, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-	    "%s: stk500isp_read_byte(): "
-	    "timeout/error communicating with programmer\n",
-	    progname);
+    avrdude_message("%s: stk500isp_read_byte(): "
+                    "timeout/error communicating with programmer\n",
+                    progname);
     return -1;
   }
 
@@ -2000,7 +1973,7 @@ static int stk500hv_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   unsigned char *cache_ptr = NULL;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500hv_write_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: stk500hv_write_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   if (strcmp(mem->desc, "flash") == 0) {
@@ -2048,10 +2021,9 @@ static int stk500hv_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     pulsewidth = p->programlockpulsewidth;
     timeout = p->programlockpolltimeout;
   } else {
-    fprintf(stderr,
-	    "%s: stk500hv_write_byte(): "
-	    "unsupported memory type: %s\n",
-	    progname, mem->desc);
+    avrdude_message("%s: stk500hv_write_byte(): "
+                    "unsupported memory type: %s\n",
+                    progname, mem->desc);
     return -1;
   }
 
@@ -2110,16 +2082,15 @@ static int stk500hv_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   }
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500hv_write_byte(): Sending write memory command: ",
+    avrdude_message("%s: stk500hv_write_byte(): Sending write memory command: ",
 	    progname);
 
   result = stk500v2_command(pgm, buf, cmdlen, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-	    "%s: stk500hv_write_byte(): "
-	    "timeout/error communicating with programmer\n",
-	    progname);
+    avrdude_message("%s: stk500hv_write_byte(): "
+                    "timeout/error communicating with programmer\n",
+                    progname);
     return -1;
   }
 
@@ -2164,7 +2135,7 @@ static int stk500isp_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   OPCODE *op;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500isp_write_byte(.., %s, 0x%lx, ...)\n",
+    avrdude_message("%s: stk500isp_write_byte(.., %s, 0x%lx, ...)\n",
 	    progname, mem->desc, addr);
 
   if (strcmp(mem->desc, "flash") == 0 ||
@@ -2216,18 +2187,16 @@ static int stk500isp_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   } else if (strcmp(mem->desc, "lock") == 0) {
     buf[0] = CMD_PROGRAM_LOCK_ISP;
   } else {
-    fprintf(stderr,
-	    "%s: stk500isp_write_byte(): "
-	    "unsupported memory type: %s\n",
-	    progname, mem->desc);
+    avrdude_message("%s: stk500isp_write_byte(): "
+                    "unsupported memory type: %s\n",
+                    progname, mem->desc);
     return -1;
   }
 
   if ((op = mem->op[AVR_OP_WRITE]) == NULL) {
-    fprintf(stderr,
-	    "%s: stk500isp_write_byte(): "
-	    "no AVR_OP_WRITE for %s memory\n",
-	    progname, mem->desc);
+    avrdude_message("%s: stk500isp_write_byte(): "
+                    "no AVR_OP_WRITE for %s memory\n",
+                    progname, mem->desc);
     return -1;
   }
 
@@ -2236,16 +2205,15 @@ static int stk500isp_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
   avr_set_input(op, buf + 1, data);
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500isp_write_byte(): Sending write memory command: ",
+    avrdude_message("%s: stk500isp_write_byte(): Sending write memory command: ",
 	    progname);
 
   result = stk500v2_command(pgm, buf, 5, sizeof(buf));
 
   if (result < 0) {
-    fprintf(stderr,
-	    "%s: stk500isp_write_byte(): "
-	    "timeout/error communicating with programmer\n",
-	    progname);
+    avrdude_message("%s: stk500isp_write_byte(): "
+                    "timeout/error communicating with programmer\n",
+                    progname);
     return -1;
   }
 
@@ -2317,7 +2285,7 @@ static int stk500v2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     commandbuf[3] = m->mode | 0x80;		// yes, write the page to flash
 
     if (m->op[AVR_OP_LOADPAGE_LO] == NULL) {
-      fprintf(stderr, "%s: stk500v2_paged_write: loadpage instruction not defined for part \"%s\"\n",
+      avrdude_message("%s: stk500v2_paged_write: loadpage instruction not defined for part \"%s\"\n",
               progname, p->desc);
       return -1;
     }
@@ -2325,7 +2293,7 @@ static int stk500v2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     commandbuf[5] = cmds[0];
 
     if (m->op[AVR_OP_WRITEPAGE] == NULL) {
-      fprintf(stderr, "%s: stk500v2_paged_write: write page instruction not defined for part \"%s\"\n",
+      avrdude_message("%s: stk500v2_paged_write: write page instruction not defined for part \"%s\"\n",
               progname, p->desc);
       return -1;
     }
@@ -2338,7 +2306,7 @@ static int stk500v2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     commandbuf[3] = m->mode | 0x80;		// yes, write the words to flash
 
     if (wop == NULL) {
-      fprintf(stderr, "%s: stk500v2_paged_write: write instruction not defined for part \"%s\"\n",
+      avrdude_message("%s: stk500v2_paged_write: write instruction not defined for part \"%s\"\n",
               progname, p->desc);
       return -1;
     }
@@ -2349,7 +2317,7 @@ static int stk500v2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
   // the read command is common to both methods
   if (rop == NULL) {
-    fprintf(stderr, "%s: stk500v2_paged_write: read instruction not defined for part \"%s\"\n",
+    avrdude_message("%s: stk500v2_paged_write: read instruction not defined for part \"%s\"\n",
             progname, p->desc);
     return -1;
   }
@@ -2384,9 +2352,8 @@ static int stk500v2_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
     result = stk500v2_command(pgm,buf,block_size+10, sizeof(buf));
     if (result < 0) {
-      fprintf(stderr,
-              "%s: stk500v2_paged_write: write command failed\n",
-              progname);
+      avrdude_message("%s: stk500v2_paged_write: write command failed\n",
+                      progname);
       return -1;
     }
   }
@@ -2480,9 +2447,8 @@ static int stk500hv_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
     result = stk500v2_command(pgm, buf, page_size + 5, sizeof(buf));
     if (result < 0) {
-      fprintf(stderr,
-              "%s: stk500hv_paged_write: write command failed\n",
-              progname);
+      avrdude_message("%s: stk500hv_paged_write: write command failed\n",
+                      progname);
       return -1;
     }
   }
@@ -2554,7 +2520,7 @@ static int stk500v2_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
   // the read command is common to both methods
   if (rop == NULL) {
-    fprintf(stderr, "%s: stk500v2_paged_load: read instruction not defined for part \"%s\"\n",
+    avrdude_message("%s: stk500v2_paged_load: read instruction not defined for part \"%s\"\n",
             progname, p->desc);
     return -1;
   }
@@ -2583,15 +2549,14 @@ static int stk500v2_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
     result = stk500v2_command(pgm,buf,4,sizeof(buf));
     if (result < 0) {
-      fprintf(stderr,
-              "%s: stk500v2_paged_load: read command failed\n",
-              progname);
+      avrdude_message("%s: stk500v2_paged_load: read command failed\n",
+                      progname);
       return -1;
     }
 #if 0
     for (i=0;i<page_size;i++) {
-      fprintf(stderr,"%02X",buf[2+i]);
-      if (i%16 == 15) fprintf(stderr,"\n");
+      avrdude_message("%02X",buf[2+i]);
+      if (i%16 == 15) avrdude_message("\n");
     }
 #endif
 
@@ -2664,15 +2629,14 @@ static int stk500hv_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
     result = stk500v2_command(pgm, buf, 3, sizeof(buf));
     if (result < 0) {
-      fprintf(stderr,
-              "%s: stk500hv_paged_load: read command failed\n",
-              progname);
+      avrdude_message("%s: stk500hv_paged_load: read command failed\n",
+                      progname);
       return -1;
     }
 #if 0
     for (i = 0; i < page_size; i++) {
-      fprintf(stderr, "%02X", buf[2 + i]);
-      if (i % 16 == 15) fprintf(stderr, "\n");
+      avrdude_message("%02X", buf[2 + i]);
+      if (i % 16 == 15) avrdude_message("\n");
     }
 #endif
 
@@ -2706,9 +2670,8 @@ static int stk500hvsp_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 static int stk500v2_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
                                unsigned int addr)
 {
-  fprintf(stderr,
-          "%s: stk500v2_page_erase(): this function must never be called\n",
-          progname);
+  avrdude_message("%s: stk500v2_page_erase(): this function must never be called\n",
+                  progname);
   return -1;
 }
 
@@ -2719,16 +2682,14 @@ static int stk500v2_set_vtarget(PROGRAMMER * pgm, double v)
   utarg = (unsigned)((v + 0.049) * 10);
 
   if (stk500v2_getparm(pgm, PARAM_VADJUST, &uaref) != 0) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_vtarget(): cannot obtain V[aref]\n",
-	    progname);
+    avrdude_message("%s: stk500v2_set_vtarget(): cannot obtain V[aref]\n",
+                    progname);
     return -1;
   }
 
   if (uaref > utarg) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_vtarget(): reducing V[aref] from %.1f to %.1f\n",
-	    progname, uaref / 10.0, v);
+    avrdude_message("%s: stk500v2_set_vtarget(): reducing V[aref] from %.1f to %.1f\n",
+                    progname, uaref / 10.0, v);
     if (stk500v2_setparm(pgm, PARAM_VADJUST, utarg)
 	!= 0)
       return -1;
@@ -2745,17 +2706,15 @@ static int stk500v2_set_varef(PROGRAMMER * pgm, unsigned int chan /* unused */,
   uaref = (unsigned)((v + 0.049) * 10);
 
   if (stk500v2_getparm(pgm, PARAM_VTARGET, &utarg) != 0) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_varef(): cannot obtain V[target]\n",
-	    progname);
+    avrdude_message("%s: stk500v2_set_varef(): cannot obtain V[target]\n",
+                    progname);
     return -1;
   }
 
   if (uaref > utarg) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_varef(): V[aref] must not be greater than "
-	    "V[target] = %.1f\n",
-	    progname, utarg / 10.0);
+    avrdude_message("%s: stk500v2_set_varef(): V[aref] must not be greater than "
+                    "V[target] = %.1f\n",
+                    progname, utarg / 10.0);
     return -1;
   }
   return stk500v2_setparm(pgm, PARAM_VADJUST, uaref);
@@ -2783,9 +2742,8 @@ static int stk500v2_set_fosc(PROGRAMMER * pgm, double v)
         unit = "kHz";
       } else
         unit = "Hz";
-      fprintf(stderr,
-          "%s: stk500v2_set_fosc(): f = %.3f %s too high, using %.3f MHz\n",
-          progname, v, unit, STK500V2_XTAL / 2e6);
+      avrdude_message("%s: stk500v2_set_fosc(): f = %.3f %s too high, using %.3f MHz\n",
+                      progname, v, unit, STK500V2_XTAL / 2e6);
       fosc = STK500V2_XTAL / 2;
     } else
       fosc = (unsigned)v;
@@ -2799,7 +2757,7 @@ static int stk500v2_set_fosc(PROGRAMMER * pgm, double v)
       }
     }
     if (idx == sizeof(ps) / sizeof(ps[0])) {
-      fprintf(stderr, "%s: stk500v2_set_fosc(): f = %u Hz too low, %u Hz min\n",
+      avrdude_message("%s: stk500v2_set_fosc(): f = %u Hz too low, %u Hz min\n",
           progname, fosc, STK500V2_XTAL / (256 * 1024 * 2));
       return -1;
     }
@@ -2846,7 +2804,7 @@ static int stk500v2_set_sck_period_mk2(PROGRAMMER * pgm, double v)
   }
 
   if (verbose > 2)
-    fprintf(stderr, "Using p = %.2f us for SCK (param = %d)\n",
+    avrdude_message("Using p = %.2f us for SCK (param = %d)\n",
 	    1000000 / avrispmkIIfreqs[i], i);
 
   return stk500v2_setparm(pgm, PARAM_SCK_DURATION, i);
@@ -2869,9 +2827,8 @@ static unsigned int stk500v2_mode_for_pagesize(unsigned int pagesize)
     case 64:   return 6u << 1;
     case 128:  return 7u << 1;
     }
-  fprintf(stderr,
-	  "%s: stk500v2_mode_for_pagesize(): invalid pagesize: %u\n",
-	  progname, pagesize);
+  avrdude_message("%s: stk500v2_mode_for_pagesize(): invalid pagesize: %u\n",
+                  progname, pagesize);
   return 0;
 }
 
@@ -2939,16 +2896,14 @@ static int stk600_set_vtarget(PROGRAMMER * pgm, double v)
   utarg = (unsigned)((v + 0.049) * 10);
 
   if (stk500v2_getparm2(pgm, PARAM2_AREF0, &uaref) != 0) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_vtarget(): cannot obtain V[aref][0]\n",
-	    progname);
+    avrdude_message("%s: stk500v2_set_vtarget(): cannot obtain V[aref][0]\n",
+                    progname);
     return -1;
   }
 
   if (uaref > (unsigned)utarg * 10) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_vtarget(): reducing V[aref][0] from %.2f to %.1f\n",
-	    progname, uaref / 100.0, v);
+    avrdude_message("%s: stk500v2_set_vtarget(): reducing V[aref][0] from %.2f to %.1f\n",
+                    progname, uaref / 100.0, v);
     uaref = 10 * (unsigned)utarg;
     if (stk500v2_setparm2(pgm, PARAM2_AREF0, uaref)
 	!= 0)
@@ -2956,16 +2911,14 @@ static int stk600_set_vtarget(PROGRAMMER * pgm, double v)
   }
 
   if (stk500v2_getparm2(pgm, PARAM2_AREF1, &uaref) != 0) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_vtarget(): cannot obtain V[aref][1]\n",
-	    progname);
+    avrdude_message("%s: stk500v2_set_vtarget(): cannot obtain V[aref][1]\n",
+                    progname);
     return -1;
   }
 
   if (uaref > (unsigned)utarg * 10) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_vtarget(): reducing V[aref][1] from %.2f to %.1f\n",
-	    progname, uaref / 100.0, v);
+    avrdude_message("%s: stk500v2_set_vtarget(): reducing V[aref][1] from %.2f to %.1f\n",
+                    progname, uaref / 100.0, v);
     uaref = 10 * (unsigned)utarg;
     if (stk500v2_setparm2(pgm, PARAM2_AREF1, uaref)
 	!= 0)
@@ -2994,17 +2947,15 @@ static int stk600_set_varef(PROGRAMMER * pgm, unsigned int chan, double v)
   uaref = (unsigned)((v + 0.0049) * 100);
 
   if (stk500v2_getparm(pgm, PARAM_VTARGET, &utarg) != 0) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_varef(): cannot obtain V[target]\n",
-	    progname);
+    avrdude_message("%s: stk500v2_set_varef(): cannot obtain V[target]\n",
+                    progname);
     return -1;
   }
 
   if (uaref > (unsigned)utarg * 10) {
-    fprintf(stderr,
-	    "%s: stk500v2_set_varef(): V[aref] must not be greater than "
-	    "V[target] = %.1f\n",
-	    progname, utarg / 10.0);
+    avrdude_message("%s: stk500v2_set_varef(): V[aref] must not be greater than "
+                    "V[target] = %.1f\n",
+                    progname, utarg / 10.0);
     return -1;
   }
 
@@ -3017,9 +2968,8 @@ static int stk600_set_varef(PROGRAMMER * pgm, unsigned int chan, double v)
     return stk500v2_setparm2(pgm, PARAM2_AREF1, uaref);
 
   default:
-    fprintf(stderr,
-	    "%s: stk500v2_set_varef(): invalid channel %d\n",
-	    progname, chan);
+    avrdude_message("%s: stk500v2_set_varef(): invalid channel %d\n",
+                    progname, chan);
     return -1;
   }
 }
@@ -3078,7 +3028,7 @@ static int stk500v2_getparm(PROGRAMMER * pgm, unsigned char parm, unsigned char
   buf[1] = parm;
 
   if (stk500v2_command(pgm, buf, 2, sizeof(buf)) < 0) {
-    fprintf(stderr,"%s: stk500v2_getparm(): failed to get parameter 0x%02x\n",
+    avrdude_message("%s: stk500v2_getparm(): failed to get parameter 0x%02x\n",
             progname, parm);
     return -1;
   }
@@ -3097,7 +3047,7 @@ static int stk500v2_setparm_real(PROGRAMMER * pgm, unsigned char parm, unsigned
   buf[2] = value;
 
   if (stk500v2_command(pgm, buf, 3, sizeof(buf)) < 0) {
-    fprintf(stderr, "\n%s: stk500v2_setparm(): failed to set parameter 0x%02x\n",
+    avrdude_message("\n%s: stk500v2_setparm(): failed to set parameter 0x%02x\n",
             progname, parm);
     return -1;
   }
@@ -3112,11 +3062,11 @@ static int stk500v2_setparm(PROGRAMMER * pgm, unsigned char parm, unsigned char
 
   res = stk500v2_getparm(pgm, parm, &current_value);
   if (res < 0)
-    fprintf(stderr, "%s: Unable to get parameter 0x%02x\n", progname, parm);
+    avrdude_message("%s: Unable to get parameter 0x%02x\n", progname, parm);
 
   // don't issue a write if the correct value is already set.
   if (value == current_value && verbose > 2) {
-    fprintf(stderr, "%s: Skipping paramter write; parameter value already set.\n", progname);
+    avrdude_message("%s: Skipping paramter write; parameter value already set.\n", progname);
     return 0;
   }
 
@@ -3131,7 +3081,7 @@ static int stk500v2_getparm2(PROGRAMMER * pgm, unsigned char parm, unsigned int
   buf[1] = parm;
 
   if (stk500v2_command(pgm, buf, 2, sizeof(buf)) < 0) {
-    fprintf(stderr,"%s: stk500v2_getparm2(): failed to get parameter 0x%02x\n",
+    avrdude_message("%s: stk500v2_getparm2(): failed to get parameter 0x%02x\n",
             progname, parm);
     return -1;
   }
@@ -3151,7 +3101,7 @@ static int stk500v2_setparm2(PROGRAMMER * pgm, unsigned char parm, unsigned int
   buf[3] = value;
 
   if (stk500v2_command(pgm, buf, 4, sizeof(buf)) < 0) {
-    fprintf(stderr, "\n%s: stk500v2_setparm2(): failed to set parameter 0x%02x\n",
+    avrdude_message("\n%s: stk500v2_setparm2(): failed to set parameter 0x%02x\n",
             progname, parm);
     return -1;
   }
@@ -3192,19 +3142,19 @@ static void stk500v2_display(PROGRAMMER * pgm, const char * p)
   }
   if (PDATA(pgm)->pgmtype != PGMTYPE_JTAGICE_MKII &&
       PDATA(pgm)->pgmtype != PGMTYPE_JTAGICE3) {
-    fprintf(stderr, "%sProgrammer Model: %s\n", p, pgmname);
+    avrdude_message("%sProgrammer Model: %s\n", p, pgmname);
     stk500v2_getparm(pgm, PARAM_HW_VER, &hdw);
     stk500v2_getparm(pgm, PARAM_SW_MAJOR, &maj);
     stk500v2_getparm(pgm, PARAM_SW_MINOR, &min);
-    fprintf(stderr, "%sHardware Version: %d\n", p, hdw);
-    fprintf(stderr, "%sFirmware Version Master : %d.%02d\n", p, maj, min);
+    avrdude_message("%sHardware Version: %d\n", p, hdw);
+    avrdude_message("%sFirmware Version Master : %d.%02d\n", p, maj, min);
     if (PDATA(pgm)->pgmtype == PGMTYPE_STK600) {
       stk500v2_getparm(pgm, PARAM_SW_MAJOR_SLAVE1, &maj_s1);
       stk500v2_getparm(pgm, PARAM_SW_MINOR_SLAVE1, &min_s1);
       stk500v2_getparm(pgm, PARAM_SW_MAJOR_SLAVE2, &maj_s2);
       stk500v2_getparm(pgm, PARAM_SW_MINOR_SLAVE2, &min_s2);
-      fprintf(stderr, "%sFirmware Version Slave 1: %d.%02d\n", p, maj_s1, min_s1);
-      fprintf(stderr, "%sFirmware Version Slave 2: %d.%02d\n", p, maj_s2, min_s2);
+      avrdude_message("%sFirmware Version Slave 1: %d.%02d\n", p, maj_s1, min_s1);
+      avrdude_message("%sFirmware Version Slave 2: %d.%02d\n", p, maj_s2, min_s2);
     }
   }
 
@@ -3219,22 +3169,22 @@ static void stk500v2_display(PROGRAMMER * pgm, const char * p)
       case 0xDD: topcard_name = "STK520"; break;
       default: topcard_name = "Unknown"; break;
     }
-    fprintf(stderr, "%sTopcard         : %s\n", p, topcard_name);
+    avrdude_message("%sTopcard         : %s\n", p, topcard_name);
   } else if (PDATA(pgm)->pgmtype == PGMTYPE_STK600) {
     stk500v2_getparm(pgm, PARAM_ROUTINGCARD_ID, &topcard);
-    fprintf(stderr, "%sRouting card    : %s\n", p,
+    avrdude_message("%sRouting card    : %s\n", p,
 	    stk600_get_cardname(routing_cards,
 				sizeof routing_cards / sizeof routing_cards[0],
 				topcard));
     stk500v2_getparm(pgm, PARAM_SOCKETCARD_ID, &topcard);
-    fprintf(stderr, "%sSocket card     : %s\n", p,
+    avrdude_message("%sSocket card     : %s\n", p,
 	    stk600_get_cardname(socket_cards,
 				sizeof socket_cards / sizeof socket_cards[0],
 				topcard));
     stk500v2_getparm2(pgm, PARAM2_RC_ID_TABLE_REV, &rev);
-    fprintf(stderr, "%sRC_ID table rev : %d\n", p, rev);
+    avrdude_message("%sRC_ID table rev : %d\n", p, rev);
     stk500v2_getparm2(pgm, PARAM2_EC_ID_TABLE_REV, &rev);
-    fprintf(stderr, "%sEC_ID table rev : %d\n", p, rev);
+    avrdude_message("%sEC_ID table rev : %d\n", p, rev);
   }
   stk500v2_print_parms1(pgm, p);
 
@@ -3271,19 +3221,19 @@ static void stk500v2_print_parms1(PROGRAMMER * pgm, const char * p)
     pgm->cookie = PDATA(pgm)->chained_pdata;
     jtagmkII_getparm(pgm, PAR_OCD_VTARGET, vtarget_jtag);
     pgm->cookie = mycookie;
-    fprintf(stderr, "%sVtarget         : %.1f V\n", p,
+    avrdude_message("%sVtarget         : %.1f V\n", p,
 	    b2_to_u16(vtarget_jtag) / 1000.0);
   } else if (PDATA(pgm)->pgmtype == PGMTYPE_JTAGICE3) {
     mycookie = pgm->cookie;
     pgm->cookie = PDATA(pgm)->chained_pdata;
     jtag3_getparm(pgm, SCOPE_GENERAL, 1, PARM3_VTARGET, vtarget_jtag, 2);
     pgm->cookie = mycookie;
-    fprintf(stderr, "%sVtarget         : %.1f V\n", p,
+    avrdude_message("%sVtarget         : %.1f V\n", p,
 	    b2_to_u16(vtarget_jtag) / 1000.0);
 
   } else {
     stk500v2_getparm(pgm, PARAM_VTARGET, &vtarget);
-    fprintf(stderr, "%sVtarget         : %.1f V\n", p, vtarget / 10.0);
+    avrdude_message("%sVtarget         : %.1f V\n", p, vtarget / 10.0);
   }
 
   switch (PDATA(pgm)->pgmtype) {
@@ -3292,12 +3242,12 @@ static void stk500v2_print_parms1(PROGRAMMER * pgm, const char * p)
     stk500v2_getparm(pgm, PARAM_VADJUST, &vadjust);
     stk500v2_getparm(pgm, PARAM_OSC_PSCALE, &osc_pscale);
     stk500v2_getparm(pgm, PARAM_OSC_CMATCH, &osc_cmatch);
-    fprintf(stderr, "%sSCK period      : %.1f us\n", p,
+    avrdude_message("%sSCK period      : %.1f us\n", p,
 	    stk500v2_sck_to_us(pgm, sck_duration));
-    fprintf(stderr, "%sVaref           : %.1f V\n", p, vadjust / 10.0);
-    fprintf(stderr, "%sOscillator      : ", p);
+    avrdude_message("%sVaref           : %.1f V\n", p, vadjust / 10.0);
+    avrdude_message("%sOscillator      : ", p);
     if (osc_pscale == 0)
-      fprintf(stderr, "Off\n");
+      avrdude_message("Off\n");
     else {
       prescale = 1;
       f = STK500V2_XTAL / 2;
@@ -3313,14 +3263,14 @@ static void stk500v2_print_parms1(PROGRAMMER * pgm, const char * p)
       f /= prescale;
       f /= (osc_cmatch + 1);
       f = f_to_kHz_MHz(f, &unit);
-      fprintf(stderr, "%.3f %s\n", f, unit);
+      avrdude_message("%.3f %s\n", f, unit);
     }
     break;
 
   case PGMTYPE_AVRISP_MKII:
   case PGMTYPE_JTAGICE_MKII:
     stk500v2_getparm(pgm, PARAM_SCK_DURATION, &sck_duration);
-    fprintf(stderr, "%sSCK period      : %.2f us\n", p,
+    avrdude_message("%sSCK period      : %.2f us\n", p,
 	    (float) 1000000 / avrispmkIIfreqs[sck_duration]);
     break;
 
@@ -3332,7 +3282,7 @@ static void stk500v2_print_parms1(PROGRAMMER * pgm, const char * p)
       if (stk500v2_jtag3_send(pgm, cmd, 1) >= 0 &&
 	  stk500v2_jtag3_recv(pgm, cmd, 4) >= 2) {
 	unsigned int sck = cmd[1] | (cmd[2] << 8);
-	fprintf(stderr, "%sSCK period      : %.2f us\n", p,
+	avrdude_message("%sSCK period      : %.2f us\n", p,
 		(float)(1E6 / (1000.0 * sck)));
       }
     }
@@ -3340,23 +3290,23 @@ static void stk500v2_print_parms1(PROGRAMMER * pgm, const char * p)
 
   case PGMTYPE_STK600:
     stk500v2_getparm2(pgm, PARAM2_AREF0, &varef);
-    fprintf(stderr, "%sVaref 0         : %.2f V\n", p, varef / 100.0);
+    avrdude_message("%sVaref 0         : %.2f V\n", p, varef / 100.0);
     stk500v2_getparm2(pgm, PARAM2_AREF1, &varef);
-    fprintf(stderr, "%sVaref 1         : %.2f V\n", p, varef / 100.0);
+    avrdude_message("%sVaref 1         : %.2f V\n", p, varef / 100.0);
     stk500v2_getparm2(pgm, PARAM2_SCK_DURATION, &sck_stk600);
-    fprintf(stderr, "%sSCK period      : %.2f us\n", p,
+    avrdude_message("%sSCK period      : %.2f us\n", p,
 	    (float) (sck_stk600 + 1) / 8.0);
     stk500v2_getparm2(pgm, PARAM2_CLOCK_CONF, &clock_conf);
     oct = (clock_conf & 0xf000) >> 12u;
     dac = (clock_conf & 0x0ffc) >> 2u;
     f = pow(2, (double)oct) * 2078.0 / (2 - (double)dac / 1024.0);
     f = f_to_kHz_MHz(f, &unit);
-    fprintf(stderr, "%sOscillator      : %.3f %s\n",
+    avrdude_message("%sOscillator      : %.3f %s\n",
             p, f, unit);
     break;
 
   default:
-    fprintf(stderr, "%sSCK period      : %.1f us\n", p,
+    avrdude_message("%sSCK period      : %.1f us\n", p,
 	  sck_duration * 8.0e6 / STK500V2_XTAL + 0.05);
     break;
   }
@@ -3379,7 +3329,7 @@ static int stk500v2_perform_osccal(PROGRAMMER * pgm)
 
   rv = stk500v2_command(pgm, buf, 1, sizeof(buf));
   if (rv < 0) {
-    fprintf(stderr, "%s: stk500v2_perform_osccal(): failed\n",
+    avrdude_message("%s: stk500v2_perform_osccal(): failed\n",
             progname);
     return -1;
   }
@@ -3404,7 +3354,7 @@ static int stk500v2_jtagmkII_open(PROGRAMMER * pgm, char * port)
   int rv;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500v2_jtagmkII_open()\n", progname);
+    avrdude_message("%s: stk500v2_jtagmkII_open()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -3431,7 +3381,7 @@ static int stk500v2_jtagmkII_open(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -3450,9 +3400,8 @@ static int stk500v2_jtagmkII_open(PROGRAMMER * pgm, char * port)
   pgm->cookie = PDATA(pgm)->chained_pdata;
   if ((rv = jtagmkII_getsync(pgm, EMULATOR_MODE_SPI)) != 0) {
     if (rv != JTAGII_GETSYNC_FAIL_GRACEFUL)
-        fprintf(stderr,
-                "%s: failed to sync with the JTAG ICE mkII in ISP mode\n",
-                progname);
+        avrdude_message("%s: failed to sync with the JTAG ICE mkII in ISP mode\n",
+                        progname);
     pgm->cookie = mycookie;
     return -1;
   }
@@ -3477,7 +3426,7 @@ static void stk500v2_jtagmkII_close(PROGRAMMER * pgm)
   void *mycookie;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500v2_jtagmkII_close()\n", progname);
+    avrdude_message("%s: stk500v2_jtagmkII_close()\n", progname);
 
   mycookie = pgm->cookie;
   pgm->cookie = PDATA(pgm)->chained_pdata;
@@ -3494,7 +3443,7 @@ static void stk500v2_jtag3_close(PROGRAMMER * pgm)
   void *mycookie;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500v2_jtag3_close()\n", progname);
+    avrdude_message("%s: stk500v2_jtag3_close()\n", progname);
 
   mycookie = pgm->cookie;
   pgm->cookie = PDATA(pgm)->chained_pdata;
@@ -3519,7 +3468,7 @@ static int stk500v2_dragon_isp_open(PROGRAMMER * pgm, char * port)
   void *mycookie;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500v2_dragon_isp_open()\n", progname);
+    avrdude_message("%s: stk500v2_dragon_isp_open()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -3546,7 +3495,7 @@ static int stk500v2_dragon_isp_open(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -3564,7 +3513,7 @@ static int stk500v2_dragon_isp_open(PROGRAMMER * pgm, char * port)
   mycookie = pgm->cookie;
   pgm->cookie = PDATA(pgm)->chained_pdata;
   if (jtagmkII_getsync(pgm, EMULATOR_MODE_SPI) != 0) {
-    fprintf(stderr, "%s: failed to sync with the AVR Dragon in ISP mode\n",
+    avrdude_message("%s: failed to sync with the AVR Dragon in ISP mode\n",
             progname);
     pgm->cookie = mycookie;
     return -1;
@@ -3598,7 +3547,7 @@ static int stk500v2_dragon_hv_open(PROGRAMMER * pgm, char * port)
   void *mycookie;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500v2_dragon_hv_open()\n", progname);
+    avrdude_message("%s: stk500v2_dragon_hv_open()\n", progname);
 
   /*
    * The JTAG ICE mkII always starts with a baud rate of 19200 Bd upon
@@ -3625,7 +3574,7 @@ static int stk500v2_dragon_hv_open(PROGRAMMER * pgm, char * port)
     pgm->fd.usb.wep = USBDEV_BULK_EP_WRITE_MKII;
     pgm->fd.usb.eep = 0;           /* no seperate EP for events */
 #else
-    fprintf(stderr, "avrdude was compiled without usb support.\n");
+    avrdude_message("avrdude was compiled without usb support.\n");
     return -1;
 #endif
   }
@@ -3643,7 +3592,7 @@ static int stk500v2_dragon_hv_open(PROGRAMMER * pgm, char * port)
   mycookie = pgm->cookie;
   pgm->cookie = PDATA(pgm)->chained_pdata;
   if (jtagmkII_getsync(pgm, EMULATOR_MODE_HV) != 0) {
-    fprintf(stderr, "%s: failed to sync with the AVR Dragon in HV mode\n",
+    avrdude_message("%s: failed to sync with the AVR Dragon in HV mode\n",
             progname);
     pgm->cookie = mycookie;
     return -1;
@@ -3676,7 +3625,7 @@ static int stk500v2_jtag3_open(PROGRAMMER * pgm, char * port)
   int rv;
 
   if (verbose >= 2)
-    fprintf(stderr, "%s: stk500v2_jtag3_open()\n", progname);
+    avrdude_message("%s: stk500v2_jtag3_open()\n", progname);
 
   if (jtag3_open_common(pgm, port) < 0)
     return -1;
@@ -3685,9 +3634,8 @@ static int stk500v2_jtag3_open(PROGRAMMER * pgm, char * port)
   pgm->cookie = PDATA(pgm)->chained_pdata;
   if ((rv = jtag3_getsync(pgm, 42)) != 0) {
     if (rv != JTAGII_GETSYNC_FAIL_GRACEFUL)
-        fprintf(stderr,
-                "%s: failed to sync with the JTAGICE3 in ISP mode\n",
-                progname);
+        avrdude_message("%s: failed to sync with the JTAGICE3 in ISP mode\n",
+                        progname);
     pgm->cookie = mycookie;
     return -1;
   }
@@ -3720,7 +3668,7 @@ static int stk600_xprog_command(PROGRAMMER * pgm, unsigned char *b,
         s = cmdsize;
 
     if ((newb = malloc(s + 1)) == 0) {
-        fprintf(stderr, "%s: stk600_xprog_cmd(): out of memory\n",
+        avrdude_message("%s: stk600_xprog_cmd(): out of memory\n",
                 progname);
         return -1;
     }
@@ -3753,16 +3701,14 @@ static int stk600_xprog_program_enable(PROGRAMMER * pgm, AVRPART * p)
 
     if (!use_tpi) {
         if (p->nvm_base == 0) {
-            fprintf(stderr,
-            "%s: stk600_xprog_program_enable(): no nvm_base parameter for PDI device\n",
-                    progname);
+            avrdude_message("%s: stk600_xprog_program_enable(): no nvm_base parameter for PDI device\n",
+                            progname);
             return -1;
         }
         if ((mem = avr_locate_mem(p, "eeprom")) != NULL) {
             if (mem->page_size == 0) {
-                fprintf(stderr,
-                "%s: stk600_xprog_program_enable(): no EEPROM page_size parameter for PDI device\n",
-                        progname);
+                avrdude_message("%s: stk600_xprog_program_enable(): no EEPROM page_size parameter for PDI device\n",
+                                progname);
                 return -1;
             }
             eepagesize = mem->page_size;
@@ -3772,17 +3718,15 @@ static int stk600_xprog_program_enable(PROGRAMMER * pgm, AVRPART * p)
     buf[0] = CMD_XPROG_SETMODE;
     buf[1] = use_tpi? XPRG_MODE_TPI: XPRG_MODE_PDI;
     if (stk500v2_command(pgm, buf, 2, sizeof(buf)) < 0) {
-        fprintf(stderr,
-        "%s: stk600_xprog_program_enable(): CMD_XPROG_SETMODE(XPRG_MODE_%s) failed\n",
-                progname, use_tpi? "TPI": "PDI");
+        avrdude_message("%s: stk600_xprog_program_enable(): CMD_XPROG_SETMODE(XPRG_MODE_%s) failed\n",
+                        progname, use_tpi? "TPI": "PDI");
         return -1;
     }
 
     buf[0] = XPRG_CMD_ENTER_PROGMODE;
     if (stk600_xprog_command(pgm, buf, 1, 2) < 0) {
-        fprintf(stderr,
-        "%s: stk600_xprog_program_enable(): XPRG_CMD_ENTER_PROGMODE failed\n",
-                progname);
+        avrdude_message("%s: stk600_xprog_program_enable(): XPRG_CMD_ENTER_PROGMODE failed\n",
+                        progname);
         return -1;
     }
 
@@ -3798,9 +3742,8 @@ static int stk600_xprog_program_enable(PROGRAMMER * pgm, AVRPART * p)
         buf[1] = XPRG_PARAM_TPI_3;
         buf[2] = 51;
         if (stk600_xprog_command(pgm, buf, 3, 2) < 0) {
-            fprintf(stderr,
-            "%s: stk600_xprog_program_enable(): XPRG_CMD_SET_PARAM(XPRG_PARAM_TPI_3) failed\n",
-                    progname);
+            avrdude_message("%s: stk600_xprog_program_enable(): XPRG_CMD_SET_PARAM(XPRG_PARAM_TPI_3) failed\n",
+                            progname);
             return -1;
         }
 
@@ -3808,9 +3751,8 @@ static int stk600_xprog_program_enable(PROGRAMMER * pgm, AVRPART * p)
         buf[1] = XPRG_PARAM_TPI_4;
         buf[2] = 50;
         if (stk600_xprog_command(pgm, buf, 3, 2) < 0) {
-            fprintf(stderr,
-            "%s: stk600_xprog_program_enable(): XPRG_CMD_SET_PARAM(XPRG_PARAM_TPI_4) failed\n",
-                    progname);
+            avrdude_message("%s: stk600_xprog_program_enable(): XPRG_CMD_SET_PARAM(XPRG_PARAM_TPI_4) failed\n",
+                            progname);
             return -1;
         }
     } else {
@@ -3829,9 +3771,8 @@ static int stk600_xprog_program_enable(PROGRAMMER * pgm, AVRPART * p)
         buf[4] = nvm_base >> 8;
         buf[5] = nvm_base;
         if (stk600_xprog_command(pgm, buf, 6, 2) < 0) {
-            fprintf(stderr,
-            "%s: stk600_xprog_program_enable(): XPRG_CMD_SET_PARAM(XPRG_PARAM_NVMBASE) failed\n",
-                    progname);
+            avrdude_message("%s: stk600_xprog_program_enable(): XPRG_CMD_SET_PARAM(XPRG_PARAM_NVMBASE) failed\n",
+                            progname);
             return -1;
         }
 
@@ -3841,9 +3782,8 @@ static int stk600_xprog_program_enable(PROGRAMMER * pgm, AVRPART * p)
             buf[2] = eepagesize >> 8;
             buf[3] = eepagesize;
             if (stk600_xprog_command(pgm, buf, 4, 2) < 0) {
-                fprintf(stderr,
-                "%s: stk600_xprog_program_enable(): XPRG_CMD_SET_PARAM(XPRG_PARAM_EEPPAGESIZE) failed\n",
-                        progname);
+                avrdude_message("%s: stk600_xprog_program_enable(): XPRG_CMD_SET_PARAM(XPRG_PARAM_EEPPAGESIZE) failed\n",
+                                progname);
                 return -1;
             }
         }
@@ -3867,9 +3807,8 @@ static void stk600_xprog_disable(PROGRAMMER * pgm)
 
     buf[0] = XPRG_CMD_LEAVE_PROGMODE;
     if (stk600_xprog_command(pgm, buf, 1, 2) < 0) {
-        fprintf(stderr,
-                "%s: stk600_xprog_program_disable(): XPRG_CMD_LEAVE_PROGMODE failed\n",
-                progname);
+        avrdude_message("%s: stk600_xprog_program_disable(): XPRG_CMD_LEAVE_PROGMODE failed\n",
+                        progname);
     }
 }
 
@@ -3905,9 +3844,8 @@ static int stk600_xprog_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     } else if (strcmp(mem->desc, "usersig") == 0) {
         memcode = XPRG_MEM_TYPE_USERSIG;
     } else {
-        fprintf(stderr,
-                "%s: stk600_xprog_write_byte(): unknown memory \"%s\"\n",
-                progname, mem->desc);
+        avrdude_message("%s: stk600_xprog_write_byte(): unknown memory \"%s\"\n",
+                        progname, mem->desc);
         return -1;
     }
     addr += mem->offset;
@@ -3920,9 +3858,8 @@ static int stk600_xprog_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
         b[4] = mem->offset >> 8;
         b[5] = mem->offset + 1;
         if (stk600_xprog_command(pgm, b, 6, 2) < 0) {
-	    fprintf(stderr,
-	    "%s: stk600_xprog_chip_erase(): XPRG_CMD_ERASE(XPRG_ERASE_CONFIG) failed\n",
-		    progname);
+	    avrdude_message("%s: stk600_xprog_chip_erase(): XPRG_CMD_ERASE(XPRG_ERASE_CONFIG) failed\n",
+                            progname);
 	    return -1;
 	}
     }
@@ -3948,9 +3885,8 @@ static int stk600_xprog_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     b[8] = write_size;
     b[9] = data;
     if (stk600_xprog_command(pgm, b, 9 + write_size, 2) < 0) {
-        fprintf(stderr,
-                "%s: stk600_xprog_write_byte(): XPRG_CMD_WRITE_MEM failed\n",
-                progname);
+        avrdude_message("%s: stk600_xprog_write_byte(): XPRG_CMD_WRITE_MEM failed\n",
+                        progname);
         return -1;
     }
     return 0;
@@ -3982,9 +3918,8 @@ static int stk600_xprog_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     } else if (strcmp(mem->desc, "usersig") == 0) {
         b[1] = XPRG_MEM_TYPE_USERSIG;
     } else {
-        fprintf(stderr,
-                "%s: stk600_xprog_read_byte(): unknown memory \"%s\"\n",
-                progname, mem->desc);
+        avrdude_message("%s: stk600_xprog_read_byte(): unknown memory \"%s\"\n",
+                        progname, mem->desc);
         return -1;
     }
     addr += mem->offset;
@@ -3997,9 +3932,8 @@ static int stk600_xprog_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     b[6] = 0;
     b[7] = 1;
     if (stk600_xprog_command(pgm, b, 8, 3) < 0) {
-        fprintf(stderr,
-                "%s: stk600_xprog_read_byte(): XPRG_CMD_READ_MEM failed\n",
-                progname);
+        avrdude_message("%s: stk600_xprog_read_byte(): XPRG_CMD_READ_MEM failed\n",
+                        progname);
         return -1;
     }
     *value = b[2];
@@ -4058,18 +3992,16 @@ static int stk600_xprog_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
     } else if (strcmp(mem->desc, "usersig") == 0) {
         memtype = XPRG_MEM_TYPE_USERSIG;
     } else {
-        fprintf(stderr,
-                "%s: stk600_xprog_paged_load(): unknown paged memory \"%s\"\n",
-                progname, mem->desc);
+        avrdude_message("%s: stk600_xprog_paged_load(): unknown paged memory \"%s\"\n",
+                        progname, mem->desc);
         return -1;
     }
     offset = addr;
     addr += mem->offset;
 
     if ((b = malloc(page_size + 2)) == NULL) {
-	fprintf(stderr,
-                "%s: stk600_xprog_paged_load(): out of memory\n",
-                progname);
+	avrdude_message("%s: stk600_xprog_paged_load(): out of memory\n",
+                        progname);
         return -1;
     }
 
@@ -4091,9 +4023,8 @@ static int stk600_xprog_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 	b[6] = page_size >> 8;
 	b[7] = page_size;
 	if (stk600_xprog_command(pgm, b, 8, page_size + 2) < 0) {
-	    fprintf(stderr,
-		    "%s: stk600_xprog_paged_load(): XPRG_CMD_READ_MEM failed\n",
-		    progname);
+	    avrdude_message("%s: stk600_xprog_paged_load(): XPRG_CMD_READ_MEM failed\n",
+                            progname);
 	    free(b);
 	    return -1;
 	}
@@ -4127,9 +4058,8 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
      * transfer.
      */
     if (page_size > 512) {
-	fprintf(stderr,
-		"%s: stk600_xprog_paged_write(): cannot handle page size > 512\n",
-		progname);
+	avrdude_message("%s: stk600_xprog_paged_write(): cannot handle page size > 512\n",
+                        progname);
 	return -1;
     }
 
@@ -4176,18 +4106,16 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
         memtype = XPRG_MEM_TYPE_USERSIG;
         writemode = (1 << XPRG_MEM_WRITE_WRITE);
     } else {
-        fprintf(stderr,
-                "%s: stk600_xprog_paged_write(): unknown paged memory \"%s\"\n",
-                progname, mem->desc);
+        avrdude_message("%s: stk600_xprog_paged_write(): unknown paged memory \"%s\"\n",
+                        progname, mem->desc);
         return -1;
     }
     offset = addr;
     addr += mem->offset;
 
     if ((b = malloc(page_size + 9)) == NULL) {
-	fprintf(stderr,
-                "%s: stk600_xprog_paged_write(): out of memory\n",
-                progname);
+	avrdude_message("%s: stk600_xprog_paged_write(): out of memory\n",
+                        progname);
         return -1;
     }
 
@@ -4212,9 +4140,8 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 	     * erase page / write page bits in the final chunk helps.
 	     */
 	    if (page_size % 256 != 0) {
-		fprintf(stderr,
-			"%s: stk600_xprog_paged_write(): page size not multiple of 256\n",
-			progname);
+		avrdude_message("%s: stk600_xprog_paged_write(): page size not multiple of 256\n",
+                                progname);
 		free(b);
 		return -1;
 	    }
@@ -4237,9 +4164,8 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 		b[8] = 0;
 		memcpy(b + 9, mem->buf + offset, writesize);
 		if (stk600_xprog_command(pgm, b, 256 + 9, 2) < 0) {
-		    fprintf(stderr,
-			    "%s: stk600_xprog_paged_write(): XPRG_CMD_WRITE_MEM failed\n",
-			    progname);
+		    avrdude_message("%s: stk600_xprog_paged_write(): XPRG_CMD_WRITE_MEM failed\n",
+                                    progname);
 		    free(b);
 		    return -1;
 		}
@@ -4272,9 +4198,8 @@ static int stk600_xprog_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * mem,
 	    b[8] = page_size;
 	    memcpy(b + 9, mem->buf + offset, writesize);
 	    if (stk600_xprog_command(pgm, b, page_size + 9, 2) < 0) {
-		fprintf(stderr,
-			"%s: stk600_xprog_paged_write(): XPRG_CMD_WRITE_MEM failed\n",
-			progname);
+		avrdude_message("%s: stk600_xprog_paged_write(): XPRG_CMD_WRITE_MEM failed\n",
+                                progname);
 		free(b);
 		return -1;
 	    }
@@ -4299,9 +4224,8 @@ static int stk600_xprog_chip_erase(PROGRAMMER * pgm, AVRPART * p)
 
     if (p->flags & AVRPART_HAS_TPI) {
         if ((mem = avr_locate_mem(p, "flash")) == NULL) {
-            fprintf(stderr,
-            "%s: stk600_xprog_chip_erase(): no FLASH definition found for TPI device\n",
-                    progname);
+            avrdude_message("%s: stk600_xprog_chip_erase(): no FLASH definition found for TPI device\n",
+                            progname);
             return -1;
         }
         addr = mem->offset + 1;
@@ -4314,9 +4238,8 @@ static int stk600_xprog_chip_erase(PROGRAMMER * pgm, AVRPART * p)
     b[4] = addr >> 8;
     b[5] = addr;
     if (stk600_xprog_command(pgm, b, 6, 2) < 0) {
-	    fprintf(stderr,
-		    "%s: stk600_xprog_chip_erase(): XPRG_CMD_ERASE(XPRG_ERASE_CHIP) failed\n",
-		    progname);
+	    avrdude_message("%s: stk600_xprog_chip_erase(): XPRG_CMD_ERASE(XPRG_ERASE_CHIP) failed\n",
+                            progname);
 	    return -1;
 	}
     return 0;
@@ -4340,9 +4263,8 @@ static int stk600_xprog_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     } else if (strcmp(m->desc, "usersig") == 0) {
       b[1] = XPRG_ERASE_USERSIG;
     } else {
-      fprintf(stderr,
-              "%s: stk600_xprog_page_erase(): unknown paged memory \"%s\"\n",
-              progname, m->desc);
+      avrdude_message("%s: stk600_xprog_page_erase(): unknown paged memory \"%s\"\n",
+                      progname, m->desc);
       return -1;
     }
     addr += m->offset;
@@ -4352,9 +4274,8 @@ static int stk600_xprog_page_erase(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     b[4] = addr >> 8;
     b[5] = addr;
     if (stk600_xprog_command(pgm, b, 6, 2) < 0) {
-	    fprintf(stderr,
-		    "%s: stk600_xprog_page_erase(): XPRG_CMD_ERASE(%d) failed\n",
-		    progname, b[1]);
+	    avrdude_message("%s: stk600_xprog_page_erase(): XPRG_CMD_ERASE(%d) failed\n",
+                            progname, b[1]);
 	    return -1;
 	}
     return 0;
diff --git a/term.c b/term.c
index e209a111..cb5cbae3 100644
--- a/term.c
+++ b/term.c
@@ -248,7 +248,7 @@ static int cmd_dump(PROGRAMMER * pgm, struct avrpart * p,
   int rc;
 
   if (!((argc == 2) || (argc == 4))) {
-    fprintf(stderr, "Usage: dump <memtype> [<addr> <len>]\n");
+    avrdude_message("Usage: dump <memtype> [<addr> <len>]\n");
     return -1;
   }
 
@@ -263,7 +263,7 @@ static int cmd_dump(PROGRAMMER * pgm, struct avrpart * p,
 
   mem = avr_locate_mem(p, memtype);
   if (mem == NULL) {
-    fprintf(stderr, "\"%s\" memory type not defined for part \"%s\"\n",
+    avrdude_message("\"%s\" memory type not defined for part \"%s\"\n",
             memtype, p->desc);
     return -1;
   }
@@ -271,14 +271,14 @@ static int cmd_dump(PROGRAMMER * pgm, struct avrpart * p,
   if (argc == 4) {
     addr = strtoul(argv[2], &e, 0);
     if (*e || (e == argv[2])) {
-      fprintf(stderr, "%s (dump): can't parse address \"%s\"\n",
+      avrdude_message("%s (dump): can't parse address \"%s\"\n",
               progname, argv[2]);
       return -1;
     }
 
     len = strtol(argv[3], &e, 0);
     if (*e || (e == argv[3])) {
-      fprintf(stderr, "%s (dump): can't parse length \"%s\"\n",
+      avrdude_message("%s (dump): can't parse length \"%s\"\n",
               progname, argv[3]);
       return -1;
     }
@@ -292,9 +292,8 @@ static int cmd_dump(PROGRAMMER * pgm, struct avrpart * p,
       addr = 0;
     }
     else {
-      fprintf(stderr, 
-              "%s (dump): address 0x%05lx is out of range for %s memory\n",
-              progname, addr, mem->desc);
+      avrdude_message("%s (dump): address 0x%05lx is out of range for %s memory\n",
+                      progname, addr, mem->desc);
       return -1;
     }
   }
@@ -305,17 +304,17 @@ static int cmd_dump(PROGRAMMER * pgm, struct avrpart * p,
 
   buf = malloc(len);
   if (buf == NULL) {
-    fprintf(stderr, "%s (dump): out of memory\n", progname);
+    avrdude_message("%s (dump): out of memory\n", progname);
     return -1;
   }
 
   for (i=0; i<len; i++) {
     rc = pgm->read_byte(pgm, p, mem, addr+i, &buf[i]);
     if (rc != 0) {
-      fprintf(stderr, "error reading %s address 0x%05lx of part %s\n",
+      avrdude_message("error reading %s address 0x%05lx of part %s\n",
               mem->desc, addr+i, p->desc);
       if (rc == -1)
-        fprintf(stderr, "read operation not supported on memory type \"%s\"\n",
+        avrdude_message("read operation not supported on memory type \"%s\"\n",
                 mem->desc);
       return -1;
     }
@@ -347,7 +346,7 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
   AVRMEM * mem;
 
   if (argc < 4) {
-    fprintf(stderr, "Usage: write <memtype> <addr> <byte1> "
+    avrdude_message("Usage: write <memtype> <addr> <byte1> "
             "<byte2> ... byteN>\n");
     return -1;
   }
@@ -356,7 +355,7 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
 
   mem = avr_locate_mem(p, memtype);
   if (mem == NULL) {
-    fprintf(stderr, "\"%s\" memory type not defined for part \"%s\"\n",
+    avrdude_message("\"%s\" memory type not defined for part \"%s\"\n",
             memtype, p->desc);
     return -1;
   }
@@ -365,15 +364,14 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
 
   addr = strtoul(argv[2], &e, 0);
   if (*e || (e == argv[2])) {
-    fprintf(stderr, "%s (write): can't parse address \"%s\"\n",
+    avrdude_message("%s (write): can't parse address \"%s\"\n",
             progname, argv[2]);
     return -1;
   }
 
   if (addr > maxsize) {
-    fprintf(stderr, 
-            "%s (write): address 0x%05lx is out of range for %s memory\n",
-            progname, addr, memtype);
+    avrdude_message("%s (write): address 0x%05lx is out of range for %s memory\n",
+                    progname, addr, memtype);
     return -1;
   }
 
@@ -381,23 +379,22 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
   len = argc - 3;
 
   if ((addr + len) > maxsize) {
-    fprintf(stderr, 
-            "%s (write): selected address and # bytes exceed "
-            "range for %s memory\n", 
-            progname, memtype);
+    avrdude_message("%s (write): selected address and # bytes exceed "
+                    "range for %s memory\n",
+                    progname, memtype);
     return -1;
   }
 
   buf = malloc(len);
   if (buf == NULL) {
-    fprintf(stderr, "%s (write): out of memory\n", progname);
+    avrdude_message("%s (write): out of memory\n", progname);
     return -1;
   }
 
   for (i=3; i<argc; i++) {
     buf[i-3] = strtoul(argv[i], &e, 0);
     if (*e || (e == argv[i])) {
-      fprintf(stderr, "%s (write): can't parse byte \"%s\"\n",
+      avrdude_message("%s (write): can't parse byte \"%s\"\n",
               progname, argv[i]);
       free(buf);
       return -1;
@@ -409,20 +406,18 @@ static int cmd_write(PROGRAMMER * pgm, struct avrpart * p,
 
     rc = avr_write_byte(pgm, p, mem, addr+i, buf[i]);
     if (rc) {
-      fprintf(stderr, "%s (write): error writing 0x%02x at 0x%05lx, rc=%d\n",
+      avrdude_message("%s (write): error writing 0x%02x at 0x%05lx, rc=%d\n",
               progname, buf[i], addr+i, rc);
       if (rc == -1)
-        fprintf(stderr, 
-                "write operation not supported on memory type \"%s\"\n",
-                mem->desc);
+        avrdude_message("write operation not supported on memory type \"%s\"\n",
+                        mem->desc);
       werror = 1;
     }
 
     rc = pgm->read_byte(pgm, p, mem, addr+i, &b);
     if (b != buf[i]) {
-      fprintf(stderr, 
-              "%s (write): error writing 0x%02x at 0x%05lx cell=0x%02x\n",
-              progname, buf[i], addr+i, b);
+      avrdude_message("%s (write): error writing 0x%02x at 0x%05lx cell=0x%02x\n",
+                      progname, buf[i], addr+i, b);
       werror = 1;
     }
 
@@ -448,22 +443,20 @@ static int cmd_send(PROGRAMMER * pgm, struct avrpart * p,
   int len;
 
   if (pgm->cmd == NULL) {
-    fprintf(stderr,
-	    "The %s programmer does not support direct ISP commands.\n",
-	    pgm->type);
+    avrdude_message("The %s programmer does not support direct ISP commands.\n",
+                    pgm->type);
     return -1;
   }
 
   if (spi_mode && (pgm->spi == NULL)) {
-    fprintf(stderr,
-	    "The %s programmer does not support direct SPI transfers.\n",
-	    pgm->type);
+    avrdude_message("The %s programmer does not support direct SPI transfers.\n",
+                    pgm->type);
     return -1;
   }
 
 
   if ((argc > 5) || ((argc < 5) && (!spi_mode))) {
-    fprintf(stderr, spi_mode?
+    avrdude_message(spi_mode?
       "Usage: send <byte1> [<byte2> [<byte3> [<byte4>]]]\n":
       "Usage: send <byte1> <byte2> <byte3> <byte4>\n");
     return -1;
@@ -476,7 +469,7 @@ static int cmd_send(PROGRAMMER * pgm, struct avrpart * p,
   for (i=1; i<argc; i++) {
     cmd[i-1] = strtoul(argv[i], &e, 0);
     if (*e || (e == argv[i])) {
-      fprintf(stderr, "%s (send): can't parse byte \"%s\"\n",
+      avrdude_message("%s (send): can't parse byte \"%s\"\n",
               progname, argv[i]);
       return -1;
     }
@@ -492,10 +485,10 @@ static int cmd_send(PROGRAMMER * pgm, struct avrpart * p,
   /*
    * display results
    */
-  fprintf(stderr, "results:");
+  avrdude_message("results:");
   for (i=0; i<len; i++)
-    fprintf(stderr, " %02x", res[i]);
-  fprintf(stderr, "\n");
+    avrdude_message(" %02x", res[i]);
+  avrdude_message("\n");
 
   fprintf(stdout, "\n");
 
@@ -506,7 +499,7 @@ static int cmd_send(PROGRAMMER * pgm, struct avrpart * p,
 static int cmd_erase(PROGRAMMER * pgm, struct avrpart * p,
 		     int argc, char * argv[])
 {
-  fprintf(stderr, "%s: erasing chip\n", progname);
+  avrdude_message("%s: erasing chip\n", progname);
   pgm->chip_erase(pgm, p);
   return 0;
 }
@@ -532,15 +525,14 @@ static int cmd_sig(PROGRAMMER * pgm, struct avrpart * p,
 
   rc = avr_signature(pgm, p);
   if (rc != 0) {
-    fprintf(stderr, "error reading signature data, rc=%d\n",
+    avrdude_message("error reading signature data, rc=%d\n",
             rc);
   }
 
   m = avr_locate_mem(p, "signature");
   if (m == NULL) {
-    fprintf(stderr,
-            "signature data not defined for device \"%s\"\n",
-            p->desc);
+    avrdude_message("signature data not defined for device \"%s\"\n",
+                    p->desc);
   }
   else {
     fprintf(stdout, "Device signature = 0x");
@@ -564,10 +556,9 @@ static int cmd_parms(PROGRAMMER * pgm, struct avrpart * p,
 		     int argc, char * argv[])
 {
   if (pgm->print_parms == NULL) {
-    fprintf(stderr,
-	    "%s (parms): the %s programmer does not support "
-	    "adjustable parameters\n",
-	    progname, pgm->type);
+    avrdude_message("%s (parms): the %s programmer does not support "
+                    "adjustable parameters\n",
+                    progname, pgm->type);
     return -1;
   }
   pgm->print_parms(pgm);
@@ -584,22 +575,22 @@ static int cmd_vtarg(PROGRAMMER * pgm, struct avrpart * p,
   char *endp;
 
   if (argc != 2) {
-    fprintf(stderr, "Usage: vtarg <value>\n");
+    avrdude_message("Usage: vtarg <value>\n");
     return -1;
   }
   v = strtod(argv[1], &endp);
   if (endp == argv[1]) {
-    fprintf(stderr, "%s (vtarg): can't parse voltage \"%s\"\n",
+    avrdude_message("%s (vtarg): can't parse voltage \"%s\"\n",
             progname, argv[1]);
     return -1;
   }
   if (pgm->set_vtarget == NULL) {
-    fprintf(stderr, "%s (vtarg): the %s programmer cannot set V[target]\n",
+    avrdude_message("%s (vtarg): the %s programmer cannot set V[target]\n",
 	    progname, pgm->type);
     return -2;
   }
   if ((rc = pgm->set_vtarget(pgm, v)) != 0) {
-    fprintf(stderr, "%s (vtarg): failed to set V[target] (rc = %d)\n",
+    avrdude_message("%s (vtarg): failed to set V[target] (rc = %d)\n",
 	    progname, rc);
     return -3;
   }
@@ -615,7 +606,7 @@ static int cmd_fosc(PROGRAMMER * pgm, struct avrpart * p,
   char *endp;
 
   if (argc != 2) {
-    fprintf(stderr, "Usage: fosc <value>[M|k] | off\n");
+    avrdude_message("Usage: fosc <value>[M|k] | off\n");
     return -1;
   }
   v = strtod(argv[1], &endp);
@@ -623,7 +614,7 @@ static int cmd_fosc(PROGRAMMER * pgm, struct avrpart * p,
     if (strcmp(argv[1], "off") == 0)
       v = 0.0;
     else {
-      fprintf(stderr, "%s (fosc): can't parse frequency \"%s\"\n",
+      avrdude_message("%s (fosc): can't parse frequency \"%s\"\n",
 	      progname, argv[1]);
       return -1;
     }
@@ -633,13 +624,12 @@ static int cmd_fosc(PROGRAMMER * pgm, struct avrpart * p,
   else if (*endp == 'k' || *endp == 'K')
     v *= 1e3;
   if (pgm->set_fosc == NULL) {
-    fprintf(stderr,
-	    "%s (fosc): the %s programmer cannot set oscillator frequency\n",
-	    progname, pgm->type);
+    avrdude_message("%s (fosc): the %s programmer cannot set oscillator frequency\n",
+                    progname, pgm->type);
     return -2;
   }
   if ((rc = pgm->set_fosc(pgm, v)) != 0) {
-    fprintf(stderr, "%s (fosc): failed to set oscillator_frequency (rc = %d)\n",
+    avrdude_message("%s (fosc): failed to set oscillator_frequency (rc = %d)\n",
 	    progname, rc);
     return -3;
   }
@@ -655,24 +645,23 @@ static int cmd_sck(PROGRAMMER * pgm, struct avrpart * p,
   char *endp;
 
   if (argc != 2) {
-    fprintf(stderr, "Usage: sck <value>\n");
+    avrdude_message("Usage: sck <value>\n");
     return -1;
   }
   v = strtod(argv[1], &endp);
   if (endp == argv[1]) {
-    fprintf(stderr, "%s (sck): can't parse period \"%s\"\n",
+    avrdude_message("%s (sck): can't parse period \"%s\"\n",
 	    progname, argv[1]);
     return -1;
   }
   v *= 1e-6;			/* Convert from microseconds to seconds. */
   if (pgm->set_sck_period == NULL) {
-    fprintf(stderr,
-	    "%s (sck): the %s programmer cannot set SCK period\n",
-	    progname, pgm->type);
+    avrdude_message("%s (sck): the %s programmer cannot set SCK period\n",
+                    progname, pgm->type);
     return -2;
   }
   if ((rc = pgm->set_sck_period(pgm, v)) != 0) {
-    fprintf(stderr, "%s (sck): failed to set SCK period (rc = %d)\n",
+    avrdude_message("%s (sck): failed to set SCK period (rc = %d)\n",
 	    progname, rc);
     return -3;
   }
@@ -689,38 +678,38 @@ static int cmd_varef(PROGRAMMER * pgm, struct avrpart * p,
   char *endp;
 
   if (argc != 2 && argc != 3) {
-    fprintf(stderr, "Usage: varef [channel] <value>\n");
+    avrdude_message("Usage: varef [channel] <value>\n");
     return -1;
   }
   if (argc == 2) {
     chan = 0;
     v = strtod(argv[1], &endp);
     if (endp == argv[1]) {
-      fprintf(stderr, "%s (varef): can't parse voltage \"%s\"\n",
+      avrdude_message("%s (varef): can't parse voltage \"%s\"\n",
               progname, argv[1]);
       return -1;
     }
   } else {
     chan = strtoul(argv[1], &endp, 10);
     if (endp == argv[1]) {
-      fprintf(stderr, "%s (varef): can't parse channel \"%s\"\n",
+      avrdude_message("%s (varef): can't parse channel \"%s\"\n",
               progname, argv[1]);
       return -1;
     }
     v = strtod(argv[2], &endp);
     if (endp == argv[2]) {
-      fprintf(stderr, "%s (varef): can't parse voltage \"%s\"\n",
+      avrdude_message("%s (varef): can't parse voltage \"%s\"\n",
               progname, argv[2]);
       return -1;
     }
   }
   if (pgm->set_varef == NULL) {
-    fprintf(stderr, "%s (varef): the %s programmer cannot set V[aref]\n",
+    avrdude_message("%s (varef): the %s programmer cannot set V[aref]\n",
 	    progname, pgm->type);
     return -2;
   }
   if ((rc = pgm->set_varef(pgm, chan, v)) != 0) {
-    fprintf(stderr, "%s (varef): failed to set V[aref] (rc = %d)\n",
+    avrdude_message("%s (varef): failed to set V[aref] (rc = %d)\n",
 	    progname, rc);
     return -3;
   }
@@ -770,26 +759,26 @@ static int cmd_verbose(PROGRAMMER * pgm, struct avrpart * p,
   char *endp;
 
   if (argc != 1 && argc != 2) {
-    fprintf(stderr, "Usage: verbose [<value>]\n");
+    avrdude_message("Usage: verbose [<value>]\n");
     return -1;
   }
   if (argc == 1) {
-    fprintf(stderr, "Verbosity level: %d\n", verbose);
+    avrdude_message("Verbosity level: %d\n", verbose);
     return 0;
   }
   nverb = strtol(argv[1], &endp, 0);
   if (endp == argv[2]) {
-    fprintf(stderr, "%s: can't parse verbosity level \"%s\"\n",
+    avrdude_message("%s: can't parse verbosity level \"%s\"\n",
 	    progname, argv[2]);
     return -1;
   }
   if (nverb < 0) {
-    fprintf(stderr, "%s: verbosity level must be positive: %d\n",
+    avrdude_message("%s: verbosity level must be positive: %d\n",
 	    progname, nverb);
     return -1;
   }
   verbose = nverb;
-  fprintf(stderr, "New verbosity level: %d\n", verbose);
+  avrdude_message("New verbosity level: %d\n", verbose);
 
   return 0;
 }
@@ -886,7 +875,7 @@ static int do_cmd(PROGRAMMER * pgm, struct avrpart * p,
     }
     else if (strncasecmp(argv[0], cmd[i].name, len)==0) {
       if (hold != -1) {
-        fprintf(stderr, "%s: command \"%s\" is ambiguous\n",
+        avrdude_message("%s: command \"%s\" is ambiguous\n",
                 progname, argv[0]);
         return -1;
       }
@@ -897,7 +886,7 @@ static int do_cmd(PROGRAMMER * pgm, struct avrpart * p,
   if (hold != -1)
     return cmd[hold].func(pgm, p, argc, argv);
 
-  fprintf(stderr, "%s: invalid command \"%s\"\n",
+  avrdude_message("%s: invalid command \"%s\"\n",
           progname, argv[0]);
 
   return -1;
diff --git a/update.c b/update.c
index d6052f66..2f77401d 100644
--- a/update.c
+++ b/update.c
@@ -42,7 +42,7 @@ UPDATE * parse_op(char * s)
 
   upd = (UPDATE *)malloc(sizeof(UPDATE));
   if (upd == NULL) {
-    fprintf(stderr, "%s: out of memory\n", progname);
+    avrdude_message("%s: out of memory\n", progname);
     exit(1);
   }
 
@@ -57,7 +57,7 @@ UPDATE * parse_op(char * s)
     upd->op = DEVICE_WRITE;
     upd->filename = (char *)malloc(strlen(buf) + 1);
     if (upd->filename == NULL) {
-        fprintf(stderr, "%s: out of memory\n", progname);
+        avrdude_message("%s: out of memory\n", progname);
         exit(1);
     }
     strcpy(upd->filename, buf);
@@ -67,7 +67,7 @@ UPDATE * parse_op(char * s)
 
   upd->memtype = (char *)malloc(strlen(buf)+1);
   if (upd->memtype == NULL) {
-    fprintf(stderr, "%s: out of memory\n", progname);
+    avrdude_message("%s: out of memory\n", progname);
     exit(1);
   }
   strcpy(upd->memtype, buf);
@@ -83,13 +83,12 @@ UPDATE * parse_op(char * s)
     upd->op = DEVICE_VERIFY;
   }
   else {
-    fprintf(stderr, "%s: invalid I/O mode '%c' in update specification\n",
+    avrdude_message("%s: invalid I/O mode '%c' in update specification\n",
             progname, *p);
-    fprintf(stderr,
-            "  allowed values are:\n"
-            "    r = read device\n"
-            "    w = write device\n"
-            "    v = verify device\n");
+    avrdude_message("  allowed values are:\n"
+                    "    r = read device\n"
+                    "    w = write device\n"
+                    "    v = verify device\n");
     free(upd->memtype);
     free(upd);
     return NULL;
@@ -98,7 +97,7 @@ UPDATE * parse_op(char * s)
   p++;
 
   if (*p != ':') {
-    fprintf(stderr, "%s: invalid update specification\n", progname);
+    avrdude_message("%s: invalid update specification\n", progname);
     free(upd->memtype);
     free(upd);
     return NULL;
@@ -140,7 +139,7 @@ UPDATE * parse_op(char * s)
       case 'h': upd->format = FMT_HEX; break;
       case 'o': upd->format = FMT_OCT; break;
       default:
-        fprintf(stderr, "%s: invalid file format '%s' in update specifier\n",
+        avrdude_message("%s: invalid file format '%s' in update specifier\n",
                 progname, p);
         free(upd->memtype);
         free(upd);
@@ -149,7 +148,7 @@ UPDATE * parse_op(char * s)
   }
 
   if (upd->filename == NULL) {
-    fprintf(stderr, "%s: out of memory\n", progname);
+    avrdude_message("%s: out of memory\n", progname);
     free(upd->memtype);
     free(upd);
     return NULL;
@@ -166,7 +165,7 @@ UPDATE * dup_update(UPDATE * upd)
 
   u = (UPDATE *)malloc(sizeof(UPDATE));
   if (u == NULL) {
-    fprintf(stderr, "%s: out of memory\n", progname);
+    avrdude_message("%s: out of memory\n", progname);
     exit(1);
   }
 
@@ -187,7 +186,7 @@ UPDATE * new_update(int op, char * memtype, int filefmt, char * filename)
 
   u = (UPDATE *)malloc(sizeof(UPDATE));
   if (u == NULL) {
-    fprintf(stderr, "%s: out of memory\n", progname);
+    avrdude_message("%s: out of memory\n", progname);
     exit(1);
   }
 
@@ -224,7 +223,7 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
 
   mem = avr_locate_mem(p, upd->memtype);
   if (mem == NULL) {
-    fprintf(stderr, "\"%s\" memory type not defined for part \"%s\"\n",
+    avrdude_message("\"%s\" memory type not defined for part \"%s\"\n",
             upd->memtype, p->desc);
     return -1;
   }
@@ -234,13 +233,13 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
      * read out the specified device memory and write it to a file
      */
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: reading %s memory:\n",
+      avrdude_message("%s: reading %s memory:\n",
             progname, mem->desc);
 	  }
     report_progress(0,1,"Reading");
     rc = avr_read(pgm, p, upd->memtype, 0);
     if (rc < 0) {
-      fprintf(stderr, "%s: failed to read all of %s memory, rc=%d\n",
+      avrdude_message("%s: failed to read all of %s memory, rc=%d\n",
               progname, mem->desc, rc);
       return -1;
     }
@@ -248,14 +247,13 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
     size = rc;
 
     if (quell_progress < 2) {
-      fprintf(stderr,
-            "%s: writing output file \"%s\"\n",
-            progname,
-            strcmp(upd->filename, "-")==0 ? "<stdout>" : upd->filename);
+      avrdude_message("%s: writing output file \"%s\"\n",
+                      progname,
+                      strcmp(upd->filename, "-")==0 ? "<stdout>" : upd->filename);
     }
     rc = fileio(FIO_WRITE, upd->filename, upd->format, p, upd->memtype, size);
     if (rc < 0) {
-      fprintf(stderr, "%s: write to file '%s' failed\n",
+      avrdude_message("%s: write to file '%s' failed\n",
               progname, upd->filename);
       return -1;
     }
@@ -266,14 +264,13 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
      * read the data from the specified file
      */
     if (quell_progress < 2) {
-      fprintf(stderr,
-            "%s: reading input file \"%s\"\n",
-            progname,
-            strcmp(upd->filename, "-")==0 ? "<stdin>" : upd->filename);
+      avrdude_message("%s: reading input file \"%s\"\n",
+                      progname,
+                      strcmp(upd->filename, "-")==0 ? "<stdin>" : upd->filename);
     }
     rc = fileio(FIO_READ, upd->filename, upd->format, p, upd->memtype, -1);
     if (rc < 0) {
-      fprintf(stderr, "%s: read from file '%s' failed\n",
+      avrdude_message("%s: read from file '%s' failed\n",
               progname, upd->filename);
       return -1;
     }
@@ -283,7 +280,7 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
      * write the buffer contents to the selected memory type
      */
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: writing %s (%d bytes):\n",
+      avrdude_message("%s: writing %s (%d bytes):\n",
             progname, mem->desc, size);
 	  }
 
@@ -301,7 +298,7 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
     }
 
     if (rc < 0) {
-      fprintf(stderr, "%s: failed to write %s memory, rc=%d\n",
+      avrdude_message("%s: failed to write %s memory, rc=%d\n",
               progname, mem->desc, rc);
       return -1;
     }
@@ -309,7 +306,7 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
     vsize = rc;
 
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: %d bytes of %s written\n", progname,
+      avrdude_message("%s: %d bytes of %s written\n", progname,
             vsize, mem->desc);
     }
 
@@ -322,32 +319,32 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
     pgm->vfy_led(pgm, ON);
 
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: verifying %s memory against %s:\n",
+      avrdude_message("%s: verifying %s memory against %s:\n",
             progname, mem->desc, upd->filename);
 
-      fprintf(stderr, "%s: load data %s data from input file %s:\n",
+      avrdude_message("%s: load data %s data from input file %s:\n",
             progname, mem->desc, upd->filename);
     }
 
     rc = fileio(FIO_READ, upd->filename, upd->format, p, upd->memtype, -1);
     if (rc < 0) {
-      fprintf(stderr, "%s: read from file '%s' failed\n",
+      avrdude_message("%s: read from file '%s' failed\n",
               progname, upd->filename);
       return -1;
     }
     v = avr_dup_part(p);
     size = rc;
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: input file %s contains %d bytes\n",
+      avrdude_message("%s: input file %s contains %d bytes\n",
             progname, upd->filename, size);
-      fprintf(stderr, "%s: reading on-chip %s data:\n",
+      avrdude_message("%s: reading on-chip %s data:\n",
             progname, mem->desc);
     }
 
     report_progress (0,1,"Reading");
     rc = avr_read(pgm, p, upd->memtype, v);
     if (rc < 0) {
-      fprintf(stderr, "%s: failed to read all of %s memory, rc=%d\n",
+      avrdude_message("%s: failed to read all of %s memory, rc=%d\n",
               progname, mem->desc, rc);
       pgm->err_led(pgm, ON);
       return -1;
@@ -357,25 +354,25 @@ int do_op(PROGRAMMER * pgm, struct avrpart * p, UPDATE * upd, enum updateflags f
 
 
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: verifying ...\n", progname);
+      avrdude_message("%s: verifying ...\n", progname);
     }
     rc = avr_verify(p, v, upd->memtype, size);
     if (rc < 0) {
-      fprintf(stderr, "%s: verification error; content mismatch\n",
+      avrdude_message("%s: verification error; content mismatch\n",
               progname);
       pgm->err_led(pgm, ON);
       return -1;
     }
 
     if (quell_progress < 2) {
-      fprintf(stderr, "%s: %d bytes of %s verified\n",
+      avrdude_message("%s: %d bytes of %s verified\n",
               progname, rc, mem->desc);
     }
 
     pgm->vfy_led(pgm, OFF);
   }
   else {
-    fprintf(stderr, "%s: invalid update operation (%d) requested\n",
+    avrdude_message("%s: invalid update operation (%d) requested\n",
             progname, upd->op);
     return -1;
   }
diff --git a/usb_libusb.c b/usb_libusb.c
index 3fe6262f..b247e190 100644
--- a/usb_libusb.c
+++ b/usb_libusb.c
@@ -97,9 +97,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 
       if (strlen(serno) > 12)
 	{
-	  fprintf(stderr,
-		  "%s: usbdev_open(): invalid serial number \"%s\"\n",
-		  progname, serno);
+	  avrdude_message("%s: usbdev_open(): invalid serial number \"%s\"\n",
+                          progname, serno);
 	  return -1;
 	}
     }
@@ -127,9 +126,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 					    dev->descriptor.iSerialNumber,
 					    string, sizeof(string)) < 0)
 		    {
-		      fprintf(stderr,
-			      "%s: usb_open(): cannot read serial number \"%s\"\n",
-			      progname, usb_strerror());
+		      avrdude_message("%s: usb_open(): cannot read serial number \"%s\"\n",
+                                      progname, usb_strerror());
 		      /*
 		       * On some systems, libusb appears to have
 		       * problems sending control messages.  Catch the
@@ -147,9 +145,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 					    dev->descriptor.iProduct,
 					    product, sizeof(product)) < 0)
 		    {
-		      fprintf(stderr,
-			      "%s: usb_open(): cannot read product name \"%s\"\n",
-			      progname, usb_strerror());
+		      avrdude_message("%s: usb_open(): cannot read product name \"%s\"\n",
+                                      progname, usb_strerror());
 		      strcpy(product, "[unnamed product]");
 		    }
 		  /*
@@ -169,9 +166,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 		  }
 
 		  if (verbose)
-		    fprintf(stderr,
-			    "%s: usbdev_open(): Found %s, serno: %s\n",
-			    progname, product, string);
+		    avrdude_message("%s: usbdev_open(): Found %s, serno: %s\n",
+                                    progname, product, string);
 		  if (serno != NULL)
 		    {
 		      /*
@@ -183,9 +179,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 		      if (strcasecmp(string + x, serno) != 0)
 			{
 			  if (verbose > 2)
-			    fprintf(stderr,
-				    "%s: usbdev_open(): serial number doesn't match\n",
-				    progname);
+			    avrdude_message("%s: usbdev_open(): serial number doesn't match\n",
+                                            progname);
 			  usb_close(udev);
 			      continue;
 			}
@@ -193,18 +188,16 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 
 		  if (dev->config == NULL)
 		    {
-		      fprintf(stderr,
-			      "%s: usbdev_open(): USB device has no configuration\n",
-			      progname);
+		      avrdude_message("%s: usbdev_open(): USB device has no configuration\n",
+                                      progname);
 		      goto trynext;
 		    }
 
 		  if (usb_set_configuration(udev, dev->config[0].bConfigurationValue))
 		    {
-		      fprintf(stderr,
-			      "%s: usbdev_open(): WARNING: failed to set configuration %d: %s\n",
-			      progname, dev->config[0].bConfigurationValue,
-			      usb_strerror());
+		      avrdude_message("%s: usbdev_open(): WARNING: failed to set configuration %d: %s\n",
+                                      progname, dev->config[0].bConfigurationValue,
+                                      usb_strerror());
 		      /* let's hope it has already been configured */
 		      // goto trynext;
 		    }
@@ -223,9 +216,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 #endif
 		      if (usb_claim_interface(udev, usb_interface))
 			{
-			  fprintf(stderr,
-				  "%s: usbdev_open(): error claiming interface %d: %s\n",
-				  progname, usb_interface, usb_strerror());
+			  avrdude_message("%s: usbdev_open(): error claiming interface %d: %s\n",
+                                          progname, usb_interface, usb_strerror());
 			}
 		      else
 			{
@@ -242,9 +234,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 		    }
 		  if (iface == dev->config[0].bNumInterfaces)
 		    {
-		      fprintf(stderr,
-			      "%s: usbdev_open(): no usable interface found\n",
-			      progname);
+		      avrdude_message("%s: usbdev_open(): no usable interface found\n",
+                                      progname);
 		      goto trynext;
 		    }
 
@@ -261,9 +252,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 			    {
 			      if (verbose > 1)
 				{
-				  fprintf(stderr,
-					  "%s: usbdev_open(): using read endpoint 0x%02x\n",
-					  progname, possible_ep);
+				  avrdude_message("%s: usbdev_open(): using read endpoint 0x%02x\n",
+                                                  progname, possible_ep);
 				}
 			      fd->usb.rep = possible_ep;
 			      break;
@@ -271,9 +261,8 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 			}
 		      if (fd->usb.rep == 0)
 			{
-			  fprintf(stderr,
-				  "%s: usbdev_open(): cannot find a read endpoint, using 0x%02x\n",
-				  progname, USBDEV_BULK_EP_READ_MKII);
+			  avrdude_message("%s: usbdev_open(): cannot find a read endpoint, using 0x%02x\n",
+                                          progname, USBDEV_BULK_EP_READ_MKII);
 			  fd->usb.rep = USBDEV_BULK_EP_READ_MKII;
 			}
 		    }
@@ -284,34 +273,32 @@ static int usbdev_open(char * port, union pinfo pinfo, union filedescriptor *fd)
 			  dev->config[0].interface[iface].altsetting[0].endpoint[i].wMaxPacketSize < fd->usb.max_xfer)
 			{
 			  if (verbose != 0)
-			    fprintf(stderr,
-				    "%s: max packet size expected %d, but found %d due to EP 0x%02x's wMaxPacketSize\n",
-				    progname,
-				    fd->usb.max_xfer,
-				    dev->config[0].interface[iface].altsetting[0].endpoint[i].wMaxPacketSize,
-				    dev->config[0].interface[iface].altsetting[0].endpoint[i].bEndpointAddress);
+			    avrdude_message("%s: max packet size expected %d, but found %d due to EP 0x%02x's wMaxPacketSize\n",
+                                            progname,
+                                            fd->usb.max_xfer,
+                                            dev->config[0].interface[iface].altsetting[0].endpoint[i].wMaxPacketSize,
+                                            dev->config[0].interface[iface].altsetting[0].endpoint[i].bEndpointAddress);
 			  fd->usb.max_xfer = dev->config[0].interface[iface].altsetting[0].endpoint[i].wMaxPacketSize;
 			}
 		    }
 		  if (pinfo.usbinfo.flags & PINFO_FL_USEHID)
 		    {
 		      if (usb_control_msg(udev, 0x21, 0x0a /* SET_IDLE */, 0, 0, NULL, 0, 100) < 0)
-			fprintf(stderr, "%s: usbdev_open(): SET_IDLE failed\n", progname);
+			avrdude_message("%s: usbdev_open(): SET_IDLE failed\n", progname);
 		    }
 		  return 0;
 		  trynext:
 		  usb_close(udev);
 		}
 	      else
-		fprintf(stderr,
-			"%s: usbdev_open(): cannot open device: %s\n",
-			progname, usb_strerror());
+		avrdude_message("%s: usbdev_open(): cannot open device: %s\n",
+                                progname, usb_strerror());
 	    }
 	}
     }
 
   if ((pinfo.usbinfo.flags & PINFO_FL_SILENT) == 0 || verbose > 0)
-      fprintf(stderr, "%s: usbdev_open(): did not find any%s USB device \"%s\" (0x%04x:0x%04x)\n",
+      avrdude_message("%s: usbdev_open(): did not find any%s USB device \"%s\" (0x%04x:0x%04x)\n",
 	      progname, serno? " (matching)": "", port,
 	      (unsigned)pinfo.usbinfo.vid, (unsigned)pinfo.usbinfo.pid);
   return -1;
@@ -365,7 +352,7 @@ static int usbdev_send(union filedescriptor *fd, unsigned char *bp, size_t mlen)
       rv = usb_bulk_write(udev, fd->usb.wep, (char *)bp, tx_size, 10000);
     if (rv != tx_size)
     {
-        fprintf(stderr, "%s: usbdev_send(): wrote %d out of %d bytes, err = %s\n",
+        avrdude_message("%s: usbdev_send(): wrote %d out of %d bytes, err = %s\n",
                 progname, rv, tx_size, usb_strerror());
         return -1;
     }
@@ -375,22 +362,22 @@ static int usbdev_send(union filedescriptor *fd, unsigned char *bp, size_t mlen)
 
   if (verbose > 3)
   {
-      fprintf(stderr, "%s: Sent: ", progname);
+      avrdude_message("%s: Sent: ", progname);
 
       while (i) {
         unsigned char c = *p;
         if (isprint(c)) {
-          fprintf(stderr, "%c ", c);
+          avrdude_message("%c ", c);
         }
         else {
-          fprintf(stderr, ". ");
+          avrdude_message(". ");
         }
-        fprintf(stderr, "[%02x] ", c);
+        avrdude_message("[%02x] ", c);
 
         p++;
         i--;
       }
-      fprintf(stderr, "\n");
+      avrdude_message("\n");
   }
   return 0;
 }
@@ -415,7 +402,7 @@ usb_fill_buf(usb_dev_handle *udev, int maxsize, int ep, int use_interrupt_xfer)
   if (rv < 0)
     {
       if (verbose > 1)
-	fprintf(stderr, "%s: usb_fill_buf(): usb_%s_read() error %s\n",
+	avrdude_message("%s: usb_fill_buf(): usb_%s_read() error %s\n",
 		progname, (use_interrupt_xfer? "interrupt": "bulk"),
 		usb_strerror());
       return -1;
@@ -452,22 +439,22 @@ static int usbdev_recv(union filedescriptor *fd, unsigned char *buf, size_t nbyt
 
   if (verbose > 4)
   {
-      fprintf(stderr, "%s: Recv: ", progname);
+      avrdude_message("%s: Recv: ", progname);
 
       while (i) {
         unsigned char c = *p;
         if (isprint(c)) {
-          fprintf(stderr, "%c ", c);
+          avrdude_message("%c ", c);
         }
         else {
-          fprintf(stderr, ". ");
+          avrdude_message(". ");
         }
-        fprintf(stderr, "[%02x] ", c);
+        avrdude_message("[%02x] ", c);
 
         p++;
         i--;
       }
-      fprintf(stderr, "\n");
+      avrdude_message("\n");
   }
 
   return 0;
@@ -506,7 +493,7 @@ static int usbdev_recv_frame(union filedescriptor *fd, unsigned char *buf, size_
       }
       else if (rv > 0)
       {
-	  fprintf(stderr, "Short event len = %d, ignored.\n", rv);
+	  avrdude_message("Short event len = %d, ignored.\n", rv);
 	  /* fallthrough */
       }
   }
@@ -523,7 +510,7 @@ static int usbdev_recv_frame(union filedescriptor *fd, unsigned char *buf, size_
       if (rv < 0)
 	{
 	  if (verbose > 1)
-	    fprintf(stderr, "%s: usbdev_recv_frame(): usb_%s_read(): %s\n",
+	    avrdude_message("%s: usbdev_recv_frame(): usb_%s_read(): %s\n",
 		    progname, (fd->usb.use_interrupt_xfer? "interrupt": "bulk"),
 		    usb_strerror());
 	  return -1;
@@ -547,22 +534,22 @@ static int usbdev_recv_frame(union filedescriptor *fd, unsigned char *buf, size_
   if (verbose > 3)
   {
       i = n & USB_RECV_LENGTH_MASK;
-      fprintf(stderr, "%s: Recv: ", progname);
+      avrdude_message("%s: Recv: ", progname);
 
       while (i) {
         unsigned char c = *p;
         if (isprint(c)) {
-          fprintf(stderr, "%c ", c);
+          avrdude_message("%c ", c);
         }
         else {
-          fprintf(stderr, ". ");
+          avrdude_message(". ");
         }
-        fprintf(stderr, "[%02x] ", c);
+        avrdude_message("[%02x] ", c);
 
         p++;
         i--;
       }
-      fprintf(stderr, "\n");
+      avrdude_message("\n");
   }
   return n;
 }
@@ -581,7 +568,7 @@ static int usbdev_drain(union filedescriptor *fd, int display)
     else
       rv = usb_bulk_read(udev, fd->usb.rep, usbbuf, fd->usb.max_xfer, 100);
     if (rv > 0 && verbose >= 4)
-      fprintf(stderr, "%s: usbdev_drain(): flushed %d characters\n",
+      avrdude_message("%s: usbdev_drain(): flushed %d characters\n",
 	      progname, rv);
   } while (rv > 0);
 
diff --git a/usbasp.c b/usbasp.c
index d24d8110..40bc958e 100644
--- a/usbasp.c
+++ b/usbasp.c
@@ -180,9 +180,8 @@ static int usbasp_tpi_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m, unsi
 static void usbasp_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: usbasp_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: usbasp_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -230,16 +229,15 @@ static int usbasp_transmit(PROGRAMMER * pgm,
   int nbytes;
 
   if (verbose > 3) {
-    fprintf(stderr,
-	    "%s: usbasp_transmit(\"%s\", 0x%02x, 0x%02x, 0x%02x, 0x%02x)\n",
-	    progname,
-	    usbasp_get_funcname(functionid), send[0], send[1], send[2], send[3]);
+    avrdude_message("%s: usbasp_transmit(\"%s\", 0x%02x, 0x%02x, 0x%02x, 0x%02x)\n",
+                    progname,
+                    usbasp_get_funcname(functionid), send[0], send[1], send[2], send[3]);
     if (!receive && buffersize > 0) {
       int i;
-      fprintf(stderr, "%s => ", progbuf);
+      avrdude_message("%s => ", progbuf);
       for (i = 0; i < buffersize; i++)
-	fprintf(stderr, "[%02x] ", buffer[i]);
-      fprintf(stderr, "\n");
+	avrdude_message("[%02x] ", buffer[i]);
+      avrdude_message("\n");
     }
   }
 
@@ -253,7 +251,7 @@ static int usbasp_transmit(PROGRAMMER * pgm,
 				   buffersize & 0xffff,
 				   5000);
   if(nbytes < 0){
-    fprintf(stderr, "%s: error: usbasp_transmit: %s\n", progname, strerror(libusb_to_errno(nbytes)));
+    avrdude_message("%s: error: usbasp_transmit: %s\n", progname, strerror(libusb_to_errno(nbytes)));
     return -1;
   }
 #else
@@ -265,17 +263,17 @@ static int usbasp_transmit(PROGRAMMER * pgm,
 			   (char *)buffer, buffersize,
 			   5000);
   if(nbytes < 0){
-    fprintf(stderr, "%s: error: usbasp_transmit: %s\n", progname, usb_strerror());
+    avrdude_message("%s: error: usbasp_transmit: %s\n", progname, usb_strerror());
     return -1;
   }
 #endif
 
   if (verbose > 3 && receive && nbytes > 0) {
     int i;
-    fprintf(stderr, "%s<= ", progbuf);
+    avrdude_message("%s<= ", progbuf);
     for (i = 0; i < nbytes; i++)
-      fprintf(stderr, "[%02x] ", buffer[i]);
-    fprintf(stderr, "\n");
+      avrdude_message("[%02x] ", buffer[i]);
+    avrdude_message("\n");
   }
 
   return nbytes;
@@ -316,9 +314,8 @@ static int usbOpenDevice(libusb_device_handle **device, int vendor,
             r = libusb_open(dev, &handle);
             if (!handle) {
                  errorCode = USB_ERROR_ACCESS;
-                 fprintf(stderr,
-			    "%s: Warning: cannot open USB device: %s\n",
-			    progname, strerror(libusb_to_errno(r)));
+                 avrdude_message("%s: Warning: cannot open USB device: %s\n",
+                                 progname, strerror(libusb_to_errno(r)));
                     continue;
             }
             errorCode = 0;
@@ -328,15 +325,13 @@ static int usbOpenDevice(libusb_device_handle **device, int vendor,
             if (r < 0) {
                 if ((vendorName != NULL) && (vendorName[0] != 0)) {
                     errorCode = USB_ERROR_IO;
-                    fprintf(stderr,
-			    "%s: Warning: cannot query manufacturer for device: %s\n",
-			    progname, strerror(libusb_to_errno(r)));
+                    avrdude_message("%s: Warning: cannot query manufacturer for device: %s\n",
+                                    progname, strerror(libusb_to_errno(r)));
 		}
             } else {
 		if (verbose > 1)
-		    fprintf(stderr,
-			    "%s: seen device from vendor ->%s<-\n",
-			    progname, string);
+		    avrdude_message("%s: seen device from vendor ->%s<-\n",
+                                    progname, string);
                 if ((vendorName != NULL) && (vendorName[0] != 0) && (strcmp(string, vendorName) != 0))
                     errorCode = USB_ERROR_NOTFOUND;
             }
@@ -345,15 +340,13 @@ static int usbOpenDevice(libusb_device_handle **device, int vendor,
             if (r < 0) {
                 if ((productName != NULL) && (productName[0] != 0)) {
                     errorCode = USB_ERROR_IO;
-                    fprintf(stderr,
-			    "%s: Warning: cannot query product for device: %s\n",
-			    progname, strerror(libusb_to_errno(r)));
+                    avrdude_message("%s: Warning: cannot query product for device: %s\n",
+                                    progname, strerror(libusb_to_errno(r)));
 		}
             } else {
 		if (verbose > 1)
-		    fprintf(stderr,
-			    "%s: seen product ->%s<-\n",
-			    progname, string);
+		    avrdude_message("%s: seen product ->%s<-\n",
+                                    progname, string);
                 if((productName != NULL) && (productName[0] != 0) && (strcmp(string, productName) != 0))
                     errorCode = USB_ERROR_NOTFOUND;
             }
@@ -396,9 +389,8 @@ static int           didUsbInit = 0;
                 handle = usb_open(dev);
                 if(!handle){
                     errorCode = USB_ERROR_ACCESS;
-                    fprintf(stderr,
-			    "%s: Warning: cannot open USB device: %s\n",
-			    progname, usb_strerror());
+                    avrdude_message("%s: Warning: cannot open USB device: %s\n",
+                                    progname, usb_strerror());
                     continue;
                 }
                 errorCode = 0;
@@ -409,15 +401,13 @@ static int           didUsbInit = 0;
                 if(len < 0){
                     if ((vendorName != NULL) && (vendorName[0] != 0)) {
                     errorCode = USB_ERROR_IO;
-                    fprintf(stderr,
-			    "%s: Warning: cannot query manufacturer for device: %s\n",
-			    progname, usb_strerror());
+                    avrdude_message("%s: Warning: cannot query manufacturer for device: %s\n",
+                                    progname, usb_strerror());
 		    }
                 } else {
 		    if (verbose > 1)
-		        fprintf(stderr,
-				"%s: seen device from vendor ->%s<-\n",
-				progname, string);
+		        avrdude_message("%s: seen device from vendor ->%s<-\n",
+                                        progname, string);
                     if((vendorName != NULL) && (vendorName[0] != 0) && (strcmp(string, vendorName) != 0))
                         errorCode = USB_ERROR_NOTFOUND;
                 }
@@ -427,15 +417,13 @@ static int           didUsbInit = 0;
                 if(len < 0){
                     if ((productName != NULL) && (productName[0] != 0)) {
                         errorCode = USB_ERROR_IO;
-                        fprintf(stderr,
-			        "%s: Warning: cannot query product for device: %s\n",
-			        progname, usb_strerror());
+                        avrdude_message("%s: Warning: cannot query product for device: %s\n",
+                                        progname, usb_strerror());
 		    }
                 } else {
 		    if (verbose > 1)
-			fprintf(stderr,
-				"%s: seen product ->%s<-\n",
-				progname, string);
+			avrdude_message("%s: seen product ->%s<-\n",
+                                        progname, string);
                     if((productName != NULL) && (productName[0] != 0) && (strcmp(string, productName) != 0))
                         errorCode = USB_ERROR_NOTFOUND;
                 }
@@ -461,7 +449,7 @@ static int           didUsbInit = 0;
 static int usbasp_open(PROGRAMMER * pgm, char * port)
 {
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_open(\"%s\")\n",
+    avrdude_message("%s: usbasp_open(\"%s\")\n",
 	    progname, port);
 
   /* usb_init will be done in usbOpenDevice */
@@ -470,9 +458,8 @@ static int usbasp_open(PROGRAMMER * pgm, char * port)
   if (usbpid) {
     pid = *(int *)(ldata(usbpid));
     if (lnext(usbpid))
-      fprintf(stderr,
-	      "%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
-	      progname, pid);
+      avrdude_message("%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
+                      progname, pid);
   } else {
     pid = USBASP_SHARED_PID;
   }
@@ -482,16 +469,14 @@ static int usbasp_open(PROGRAMMER * pgm, char * port)
     if(strcasecmp(ldata(lfirst(pgm->id)), "usbasp") == 0) {
     /* for id usbasp autodetect some variants */
       if(strcasecmp(port, "nibobee") == 0) {
-        fprintf(stderr,
-	        "%s: warning: Using \"-C usbasp -P nibobee\" is deprecated,"
+        avrdude_message("%s: warning: Using \"-C usbasp -P nibobee\" is deprecated,"
 	        "use \"-C nibobee\" instead.\n",
 	        progname);
         if (usbOpenDevice(&PDATA(pgm)->usbhandle, USBASP_NIBOBEE_VID, "www.nicai-systems.com",
 		        USBASP_NIBOBEE_PID, "NIBObee") != 0) {
-          fprintf(stderr,
-	          "%s: error: could not find USB device "
-	          "\"NIBObee\" with vid=0x%x pid=0x%x\n",
-	          progname, USBASP_NIBOBEE_VID, USBASP_NIBOBEE_PID);
+          avrdude_message("%s: error: could not find USB device "
+                          "\"NIBObee\" with vid=0x%x pid=0x%x\n",
+                          progname, USBASP_NIBOBEE_VID, USBASP_NIBOBEE_PID);
           return -1;
         }
         return 0;
@@ -500,26 +485,24 @@ static int usbasp_open(PROGRAMMER * pgm, char * port)
       if (usbOpenDevice(&PDATA(pgm)->usbhandle, USBASP_OLD_VID, "www.fischl.de",
 		             USBASP_OLD_PID, "USBasp") == 0) {
         /* found USBasp with old IDs */
-        fprintf(stderr,
-		"%s: Warning: Found USB device \"USBasp\" with "
-	        "old VID/PID! Please update firmware of USBasp!\n",
-	        progname);
+        avrdude_message("%s: Warning: Found USB device \"USBasp\" with "
+                        "old VID/PID! Please update firmware of USBasp!\n",
+                        progname);
 	return 0;
       }
     /* original USBasp is specified in config file, so no need to check it again here */
     /* no alternative found => fall through to generic error message */
     }
 
-    fprintf(stderr,
-            "%s: error: could not find USB device with vid=0x%x pid=0x%x",
-            progname, vid, pid);
+    avrdude_message("%s: error: could not find USB device with vid=0x%x pid=0x%x",
+                    progname, vid, pid);
     if (pgm->usbvendor[0] != 0) {
-       fprintf(stderr, " vendor='%s'", pgm->usbvendor);
+       avrdude_message(" vendor='%s'", pgm->usbvendor);
     }
     if (pgm->usbproduct[0] != 0) {
-       fprintf(stderr, " product='%s'", pgm->usbproduct);
+       avrdude_message(" product='%s'", pgm->usbproduct);
     }
-    fprintf(stderr,"\n");
+    avrdude_message("\n");
     return -1;
   }
 
@@ -529,7 +512,7 @@ static int usbasp_open(PROGRAMMER * pgm, char * port)
 static void usbasp_close(PROGRAMMER * pgm)
 {
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_close()\n", progname);
+    avrdude_message("%s: usbasp_close()\n", progname);
 
   if (PDATA(pgm)->usbhandle!=NULL) {
     unsigned char temp[4];
@@ -584,7 +567,7 @@ static int usbasp_initialize(PROGRAMMER * pgm, AVRPART * p)
   IMPORT_PDATA(pgm);
 
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_initialize()\n", progname);
+    avrdude_message("%s: usbasp_initialize()\n", progname);
 
   /* get capabilities */
   memset(temp, 0, sizeof(temp));
@@ -649,7 +632,7 @@ static int usbasp_spi_cmd(PROGRAMMER * pgm, const unsigned char *cmd,
                    unsigned char *res)
 {
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_cpi_cmd(0x%02x, 0x%02x, 0x%02x, 0x%02x)%s",
+    avrdude_message("%s: usbasp_cpi_cmd(0x%02x, 0x%02x, 0x%02x, 0x%02x)%s",
 	    progname, cmd[0], cmd[1], cmd[2], cmd[3],
 	    verbose > 3? "...\n": "");
 
@@ -660,14 +643,14 @@ static int usbasp_spi_cmd(PROGRAMMER * pgm, const unsigned char *cmd,
     if (verbose == 3)
       putc('\n', stderr);
 
-    fprintf(stderr, "%s: error: wrong responds size\n",
+    avrdude_message("%s: error: wrong responds size\n",
 	    progname);
     return -1;
   }
   if (verbose > 2) {
     if (verbose > 3)
-      fprintf(stderr, "%s: usbasp_cpi_cmd()", progname);
-    fprintf(stderr, " => 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
+      avrdude_message("%s: usbasp_cpi_cmd()", progname);
+    avrdude_message(" => 0x%02x, 0x%02x, 0x%02x, 0x%02x\n",
 	    res[0], res[1], res[2], res[3]);
   }
 
@@ -684,14 +667,14 @@ static int usbasp_spi_program_enable(PROGRAMMER * pgm, AVRPART * p)
   cmd[0] = 0;
 
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_program_enable()\n",
+    avrdude_message("%s: usbasp_program_enable()\n",
 	    progname);
 
   int nbytes =
     usbasp_transmit(pgm, 1, USBASP_FUNC_ENABLEPROG, cmd, res, sizeof(res));
 
   if ((nbytes != 1) | (res[0] != 0)) {
-    fprintf(stderr, "%s: error: programm enable: target doesn't answer. %x \n",
+    avrdude_message("%s: error: programm enable: target doesn't answer. %x \n",
 	    progname, res[0]);
     return -1;
   }
@@ -705,11 +688,11 @@ static int usbasp_spi_chip_erase(PROGRAMMER * pgm, AVRPART * p)
   unsigned char res[4];
 
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_chip_erase()\n",
+    avrdude_message("%s: usbasp_chip_erase()\n",
 	    progname);
 
   if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
-    fprintf(stderr, "chip erase instruction not defined for part \"%s\"\n",
+    avrdude_message("chip erase instruction not defined for part \"%s\"\n",
             p->desc);
     return -1;
   }
@@ -736,9 +719,8 @@ static int usbasp_spi_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   int function;
 
   if (verbose > 2)
-    fprintf(stderr,
-	    "%s: usbasp_program_paged_load(\"%s\", 0x%x, %d)\n",
-	    progname, m->desc, address, n_bytes);
+    avrdude_message("%s: usbasp_program_paged_load(\"%s\", 0x%x, %d)\n",
+                    progname, m->desc, address, n_bytes);
 
   if (strcmp(m->desc, "flash") == 0) {
     function = USBASP_FUNC_READFLASH;
@@ -781,7 +763,7 @@ static int usbasp_spi_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     n = usbasp_transmit(pgm, 1, function, cmd, buffer, blocksize);
 
     if (n != blocksize) {
-      fprintf(stderr, "%s: error: wrong reading bytes %x\n",
+      avrdude_message("%s: error: wrong reading bytes %x\n",
 	      progname, n);
       return -3;
     }
@@ -806,9 +788,8 @@ static int usbasp_spi_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
   int function;
 
   if (verbose > 2)
-    fprintf(stderr,
-	    "%s: usbasp_program_paged_write(\"%s\", 0x%x, %d)\n",
-	    progname, m->desc, address, n_bytes);
+    avrdude_message("%s: usbasp_program_paged_write(\"%s\", 0x%x, %d)\n",
+                    progname, m->desc, address, n_bytes);
 
   if (strcmp(m->desc, "flash") == 0) {
     function = USBASP_FUNC_WRITEFLASH;
@@ -856,7 +837,7 @@ static int usbasp_spi_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     n = usbasp_transmit(pgm, 0, function, cmd, buffer, blocksize);
 
     if (n != blocksize) {
-      fprintf(stderr, "%s: error: wrong count at writing %x\n",
+      avrdude_message("%s: error: wrong count at writing %x\n",
 	      progname, n);
       return -3;        
     }
@@ -896,9 +877,8 @@ static int usbasp_spi_set_sck_period(PROGRAMMER *pgm, double sckperiod)
   unsigned char cmd[4];
 
   if (verbose > 2)
-    fprintf(stderr,
-	    "%s: usbasp_spi_set_sck_period(%g)\n",
-	    progname, sckperiod);
+    avrdude_message("%s: usbasp_spi_set_sck_period(%g)\n",
+                    progname, sckperiod);
 
   memset(cmd, 0, sizeof(cmd));
   memset(res, 0, sizeof(res));
@@ -910,7 +890,7 @@ static int usbasp_spi_set_sck_period(PROGRAMMER *pgm, double sckperiod)
     /* auto sck set */
 
     if (verbose >= 1)
-      fprintf(stderr, "%s: auto set sck period (because given equals null)\n", progname);
+      avrdude_message("%s: auto set sck period (because given equals null)\n", progname);
 
   } else {
 
@@ -918,7 +898,7 @@ static int usbasp_spi_set_sck_period(PROGRAMMER *pgm, double sckperiod)
     int usefreq = 0;
 
     if (verbose >= 2)
-      fprintf(stderr, "%s: try to set SCK period to %g s (= %i Hz)\n", progname, sckperiod, sckfreq);
+      avrdude_message("%s: try to set SCK period to %g s (= %i Hz)\n", progname, sckperiod, sckfreq);
 
     if (sckfreq >= usbaspSCKoptions[0].frequency) {
       clockoption = usbaspSCKoptions[0].id;
@@ -939,7 +919,7 @@ static int usbasp_spi_set_sck_period(PROGRAMMER *pgm, double sckperiod)
     /* save used sck frequency */
     PDATA(pgm)->sckfreq_hz = usefreq;
 
-    fprintf(stderr, "%s: set SCK frequency to %i Hz\n", progname, usefreq);
+    avrdude_message("%s: set SCK frequency to %i Hz\n", progname, usefreq);
   }
 
   cmd[0] = clockoption;
@@ -948,7 +928,7 @@ static int usbasp_spi_set_sck_period(PROGRAMMER *pgm, double sckperiod)
     usbasp_transmit(pgm, 1, USBASP_FUNC_SETISPSCK, cmd, res, sizeof(res));
 
   if ((nbytes != 1) | (res[0] != 0)) {
-    fprintf(stderr, "%s: warning: cannot set sck period. please check for usbasp firmware update.\n",
+    avrdude_message("%s: warning: cannot set sck period. please check for usbasp firmware update.\n",
       progname);
     return -1;
   }
@@ -975,7 +955,7 @@ static int usbasp_tpi_recv_byte(PROGRAMMER * pgm)
 
   if(usbasp_transmit(pgm, 1, USBASP_FUNC_TPI_RAWREAD, temp, temp, sizeof(temp)) != 1)
   {
-    fprintf(stderr, "%s: error: wrong responds size\n", progname);
+    avrdude_message("%s: error: wrong responds size\n", progname);
     return -1;
   }
 
@@ -988,7 +968,7 @@ static int usbasp_tpi_nvm_waitbusy(PROGRAMMER * pgm)
   int retry;
 
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_tpi_nvm_waitbusy() ...", progname);
+    avrdude_message("%s: usbasp_tpi_nvm_waitbusy() ...", progname);
 
   for(retry=50; retry>0; retry--)
   {
@@ -997,20 +977,20 @@ static int usbasp_tpi_nvm_waitbusy(PROGRAMMER * pgm)
       continue;
 
     if (verbose > 2)
-      fprintf(stderr, " ready\n");
+      avrdude_message(" ready\n");
 
     return 0;
   }
 
   if (verbose > 2)
-    fprintf(stderr, " failure\n");
+    avrdude_message(" failure\n");
 
   return -1;
 }
 
 static int usbasp_tpi_cmd(PROGRAMMER * pgm, const unsigned char *cmd, unsigned char *res)
 {
-  fprintf(stderr, "%s: error: spi_cmd used in TPI mode: not allowed\n", progname);
+  avrdude_message("%s: error: spi_cmd used in TPI mode: not allowed\n", progname);
   return -1;
 }
 
@@ -1019,7 +999,7 @@ static int usbasp_tpi_program_enable(PROGRAMMER * pgm, AVRPART * p)
   int retry;
 
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_tpi_program_enable()\n", progname);
+    avrdude_message("%s: usbasp_tpi_program_enable()\n", progname);
 
   /* change guard time */
   usbasp_tpi_send_byte(pgm, TPI_OP_SSTCS(TPIPCR));
@@ -1049,7 +1029,7 @@ static int usbasp_tpi_program_enable(PROGRAMMER * pgm, AVRPART * p)
   }
   if(retry >= 10)
   {
-    fprintf(stderr, "%s: error: programm enable: target doesn't answer.\n", progname);
+    avrdude_message("%s: error: programm enable: target doesn't answer.\n", progname);
     return -1;
   }
 
@@ -1059,7 +1039,7 @@ static int usbasp_tpi_program_enable(PROGRAMMER * pgm, AVRPART * p)
 static int usbasp_tpi_chip_erase(PROGRAMMER * pgm, AVRPART * p)
 {
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_tpi_chip_erase()\n", progname);
+    avrdude_message("%s: usbasp_tpi_chip_erase()\n", progname);
 
   /* Set PR to flash */
   usbasp_tpi_send_byte(pgm, TPI_OP_SSTPR(0));
@@ -1091,7 +1071,7 @@ static int usbasp_tpi_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
 
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_tpi_paged_load(\"%s\", 0x%0x, %d)\n",
+    avrdude_message("%s: usbasp_tpi_paged_load(\"%s\", 0x%0x, %d)\n",
 	    progname, m->desc, addr, n_bytes);
 
   dptr = addr + m->buf;
@@ -1112,7 +1092,7 @@ static int usbasp_tpi_paged_load(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     n = usbasp_transmit(pgm, 1, USBASP_FUNC_TPI_READBLOCK, cmd, dptr, clen);
     if(n != clen)
     {
-      fprintf(stderr, "%s: error: wrong reading bytes %x\n", progname, n);
+      avrdude_message("%s: error: wrong reading bytes %x\n", progname, n);
       return -3;
     }
     
@@ -1135,7 +1115,7 @@ static int usbasp_tpi_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
 
 
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_tpi_paged_write(\"%s\", 0x%0x, %d)\n",
+    avrdude_message("%s: usbasp_tpi_paged_write(\"%s\", 0x%0x, %d)\n",
 	    progname, m->desc, addr, n_bytes);
 
   sptr = addr + m->buf;
@@ -1162,7 +1142,7 @@ static int usbasp_tpi_paged_write(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m,
     n = usbasp_transmit(pgm, 0, USBASP_FUNC_TPI_WRITEBLOCK, cmd, sptr, clen);
     if(n != clen)
     {
-      fprintf(stderr, "%s: error: wrong count at writing %x\n", progname, n);
+      avrdude_message("%s: error: wrong count at writing %x\n", progname, n);
       return -3;
     }
     
@@ -1186,7 +1166,7 @@ static int usbasp_tpi_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m, unsig
 
 
   if (verbose > 2)
-    fprintf(stderr, "%s: usbasp_tpi_read_byte(\"%s\", 0x%0lx)\n",
+    avrdude_message("%s: usbasp_tpi_read_byte(\"%s\", 0x%0lx)\n",
 	    progname, m->desc, addr);
 
   pr = m->offset + addr;
@@ -1199,7 +1179,7 @@ static int usbasp_tpi_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m, unsig
   n = usbasp_transmit(pgm, 1, USBASP_FUNC_TPI_READBLOCK, cmd, value, 1);
   if(n != 1)
   {
-    fprintf(stderr, "%s: error: wrong reading bytes %x\n", progname, n);
+    avrdude_message("%s: error: wrong reading bytes %x\n", progname, n);
     return -3;
   }
   return 0;
@@ -1207,7 +1187,7 @@ static int usbasp_tpi_read_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m, unsig
 
 static int usbasp_tpi_write_byte(PROGRAMMER * pgm, AVRPART * p, AVRMEM * m, unsigned long addr, unsigned char data)
 {
-  fprintf(stderr, "%s: error: usbasp_write_byte in TPI mode: all writes have to be done at page level\n", progname);
+  avrdude_message("%s: error: usbasp_write_byte in TPI mode: all writes have to be done at page level\n", progname);
   return -1;
 }
 
@@ -1249,7 +1229,7 @@ void usbasp_initpgm(PROGRAMMER * pgm)
 
 static int usbasp_nousb_open (struct programmer_t *pgm, char * name)
 {
-  fprintf(stderr, "%s: error: no usb support. please compile again with libusb installed.\n",
+  avrdude_message("%s: error: no usb support. please compile again with libusb installed.\n",
 	  progname);
 
   return -1;
diff --git a/usbtiny.c b/usbtiny.c
index 76d5c3d1..92ef6d2c 100644
--- a/usbtiny.c
+++ b/usbtiny.c
@@ -76,9 +76,8 @@ struct pdata
 static void usbtiny_setup(PROGRAMMER * pgm)
 {
   if ((pgm->cookie = malloc(sizeof(struct pdata))) == 0) {
-    fprintf(stderr,
-	    "%s: usbtiny_setup(): Out of memory allocating private data\n",
-	    progname);
+    avrdude_message("%s: usbtiny_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(pgm->cookie, 0, sizeof(struct pdata));
@@ -101,7 +100,7 @@ static int usb_control (PROGRAMMER * pgm,
 			    NULL, 0,              // no data buffer in control messge
 			    USB_TIMEOUT );        // default timeout
   if(nbytes < 0){
-    fprintf(stderr, "\n%s: error: usbtiny_transmit: %s\n", progname, usb_strerror());
+    avrdude_message("\n%s: error: usbtiny_transmit: %s\n", progname, usb_strerror());
     return -1;
   }
 
@@ -133,7 +132,7 @@ static int usb_in (PROGRAMMER * pgm,
     }
     PDATA(pgm)->retries++;
   }
-  fprintf(stderr, "\n%s: error: usbtiny_receive: %s (expected %d, got %d)\n",
+  avrdude_message("\n%s: error: usbtiny_receive: %s (expected %d, got %d)\n",
           progname, usb_strerror(), buflen, nbytes);
   return -1;
 }
@@ -142,7 +141,7 @@ static int usb_in (PROGRAMMER * pgm,
 static void check_retries (PROGRAMMER * pgm, const char* operation)
 {
   if (PDATA(pgm)->retries > 0 && quell_progress < 2) {
-    fprintf(stderr, "%s: %d retries during %s\n", progname,
+    avrdude_message("%s: %d retries during %s\n", progname,
            PDATA(pgm)->retries, operation);
   }
   PDATA(pgm)->retries = 0;
@@ -167,7 +166,7 @@ static int usb_out (PROGRAMMER * pgm,
 			    (char *)buffer, buflen,
 			    timeout);
   if (nbytes != buflen) {
-    fprintf(stderr, "\n%s: error: usbtiny_send: %s (expected %d, got %d)\n",
+    avrdude_message("\n%s: error: usbtiny_send: %s (expected %d, got %d)\n",
 	    progname, usb_strerror(), buflen, nbytes);
     return -1;
   }
@@ -186,7 +185,7 @@ static int usbtiny_avr_op (PROGRAMMER * pgm, AVRPART * p,
   unsigned char	cmd[4];
 
   if (p->op[op] == NULL) {
-    fprintf( stderr, "Operation %d not defined for this chip!\n", op );
+    avrdude_message("Operation %d not defined for this chip!\n", op );
     return -1;
   }
   memset(cmd, 0, sizeof(cmd));
@@ -236,9 +235,8 @@ static	int	usbtiny_open(PROGRAMMER* pgm, char* name)
   if (usbpid) {
     pid = *(int *)(ldata(usbpid));
     if (lnext(usbpid))
-      fprintf(stderr,
-	      "%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
-	      progname, pid);
+      avrdude_message("%s: Warning: using PID 0x%04x, ignoring remaining PIDs in list\n",
+                      progname, pid);
   } else {
     pid = USBTINY_PRODUCT_DEFAULT;
   }
@@ -250,9 +248,8 @@ static	int	usbtiny_open(PROGRAMMER* pgm, char* name)
       if (dev->descriptor.idVendor == vid
 	  && dev->descriptor.idProduct == pid ) {   // found match?
     if(verbose)
-      fprintf(stderr,
-	      "%s: usbdev_open(): Found USBtinyISP, bus:device: %s:%s\n",
-	      progname, bus->dirname, dev->filename);
+      avrdude_message("%s: usbdev_open(): Found USBtinyISP, bus:device: %s:%s\n",
+                      progname, bus->dirname, dev->filename);
     // if -P was given, match device by device name and bus name
     if(name != NULL &&
       (NULL == dev_name ||
@@ -263,7 +260,7 @@ static	int	usbtiny_open(PROGRAMMER* pgm, char* name)
 
 	// wrong permissions or something?
 	if (!PDATA(pgm)->usb_handle) {
-	  fprintf(stderr, "%s: Warning: cannot open USB device: %s\n",
+	  avrdude_message("%s: Warning: cannot open USB device: %s\n",
 		  progname, usb_strerror());
 	  continue;
 	}
@@ -272,12 +269,12 @@ static	int	usbtiny_open(PROGRAMMER* pgm, char* name)
   }
 
   if(NULL != name && NULL == dev_name) {
-    fprintf(stderr, "%s: Error: Invalid -P value: '%s'\n", progname, name);
-    fprintf(stderr, "%sUse -P usb:bus:device\n", progbuf);
+    avrdude_message("%s: Error: Invalid -P value: '%s'\n", progname, name);
+    avrdude_message("%sUse -P usb:bus:device\n", progbuf);
     return -1;
   }
   if (!PDATA(pgm)->usb_handle) {
-    fprintf( stderr, "%s: Error: Could not find USBtiny device (0x%x/0x%x)\n",
+    avrdude_message("%s: Error: Could not find USBtiny device (0x%x/0x%x)\n",
 	     progname, vid, pid );
     return -1;
   }
@@ -323,7 +320,7 @@ static int usbtiny_set_sck_period (PROGRAMMER *pgm, double v)
     PDATA(pgm)->sck_period = SCK_MAX;
 
   if (verbose) {
-    fprintf(stderr, "%s: Setting SCK period to %d usec\n", progname,
+    avrdude_message("%s: Setting SCK period to %d usec\n", progname,
 	    PDATA(pgm)->sck_period );
   }
 
@@ -350,7 +347,7 @@ static int usbtiny_initialize (PROGRAMMER *pgm, AVRPART *p )
     // -B option not specified: use default
     PDATA(pgm)->sck_period = SCK_DEFAULT;
     if	(verbose) {
-      fprintf(stderr, "%s: Using SCK period of %d usec\n",
+      avrdude_message("%s: Using SCK period of %d usec\n",
 	      progname, PDATA(pgm)->sck_period );
     }
     if (usb_control(pgm,  USBTINY_POWERUP,
@@ -406,7 +403,7 @@ static int usbtiny_cmd(PROGRAMMER * pgm, const unsigned char *cmd, unsigned char
   check_retries(pgm, "SPI command");
   if (verbose > 1) {
     // print out the data we sent and received
-    fprintf(stderr, "CMD: [%02x %02x %02x %02x] [%02x %02x %02x %02x]\n",
+    avrdude_message("CMD: [%02x %02x %02x %02x] [%02x %02x %02x %02x]\n",
 	    cmd[0], cmd[1], cmd[2], cmd[3],
 	    res[0], res[1], res[2], res[3] );
   }
@@ -420,7 +417,7 @@ static int usbtiny_chip_erase(PROGRAMMER * pgm, AVRPART * p)
   unsigned char res[4];
 
   if (p->op[AVR_OP_CHIP_ERASE] == NULL) {
-    fprintf(stderr, "Chip erase instruction not defined for part \"%s\"\n",
+    avrdude_message("Chip erase instruction not defined for part \"%s\"\n",
             p->desc);
     return -1;
   }
@@ -581,7 +578,7 @@ void usbtiny_initpgm ( PROGRAMMER* pgm )
 
 static int usbtiny_nousb_open(struct programmer_t *pgm, char * name)
 {
-  fprintf(stderr, "%s: error: no usb support. Please compile again with libusb installed.\n",
+  avrdude_message("%s: error: no usb support. Please compile again with libusb installed.\n",
 	  progname);
 
   return -1;
diff --git a/wiring.c b/wiring.c
index b35f7f40..aee82583 100644
--- a/wiring.c
+++ b/wiring.c
@@ -85,9 +85,8 @@ static void wiring_setup(PROGRAMMER * pgm)
    * Now prepare our data
    */
   if ((mycookie = malloc(sizeof(struct wiringpdata))) == 0) {
-    fprintf(stderr,
-      "%s: wiring_setup(): Out of memory allocating private data\n",
-      progname);
+    avrdude_message("%s: wiring_setup(): Out of memory allocating private data\n",
+                    progname);
     exit(1);
   }
   memset(mycookie, 0, sizeof(struct wiringpdata));
@@ -124,25 +123,22 @@ static int wiring_parseextparms(PROGRAMMER * pgm, LISTID extparms)
       int newsnooze;
       if (sscanf(extended_param, "snooze=%i", &newsnooze) != 1 ||
           newsnooze < 0) {
-        fprintf(stderr,
-                "%s: wiring_parseextparms(): invalid snooze time '%s'\n",
-                progname, extended_param);
+        avrdude_message("%s: wiring_parseextparms(): invalid snooze time '%s'\n",
+                        progname, extended_param);
         rv = -1;
         continue;
       }
       if (verbose >= 2) {
-        fprintf(stderr,
-                "%s: wiring_parseextparms(): snooze time set to %d ms\n",
-                progname, newsnooze);
+        avrdude_message("%s: wiring_parseextparms(): snooze time set to %d ms\n",
+                        progname, newsnooze);
       }
       WIRINGPDATA(mycookie)->snoozetime = newsnooze;
 
       continue;
     }
 
-    fprintf(stderr,
-            "%s: wiring_parseextparms(): invalid extended parameter '%s'\n",
-            progname, extended_param);
+    avrdude_message("%s: wiring_parseextparms(): invalid extended parameter '%s'\n",
+                    progname, extended_param);
     rv = -1;
   }
 
@@ -165,16 +161,14 @@ static int wiring_open(PROGRAMMER * pgm, char * port)
     timetosnooze = WIRINGPDATA(mycookie)->snoozetime;
 
     if (verbose >= 2) {
-      fprintf(stderr,
-              "%s: wiring_open(): snoozing for %d ms\n",
-              progname, timetosnooze);
+      avrdude_message("%s: wiring_open(): snoozing for %d ms\n",
+                      progname, timetosnooze);
     }
     while (timetosnooze--)
       usleep(1000);
     if (verbose >= 2) {
-      fprintf(stderr,
-              "%s: wiring_open(): done snoozing\n",
-              progname);
+      avrdude_message("%s: wiring_open(): done snoozing\n",
+                      progname);
     }
 
   } else {
@@ -184,9 +178,8 @@ static int wiring_open(PROGRAMMER * pgm, char * port)
     /* since they are active LOW signals.               */
 
     if (verbose >= 2) {
-      fprintf(stderr,
-              "%s: wiring_open(): releasing DTR/RTS\n",
-              progname);
+      avrdude_message("%s: wiring_open(): releasing DTR/RTS\n",
+                      progname);
     }
 
     serial_set_dtr_rts(&pgm->fd, 0);
@@ -196,9 +189,8 @@ static int wiring_open(PROGRAMMER * pgm, char * port)
     /* are asserted (i.e. logic LOW) again.             */
 
     if (verbose >= 2) {
-      fprintf(stderr,
-              "%s: wiring_open(): asserting DTR/RTS\n",
-              progname);
+      avrdude_message("%s: wiring_open(): asserting DTR/RTS\n",
+                      progname);
     }
 
     serial_set_dtr_rts(&pgm->fd, 1);