Major code cleanup.

- Make all internal functions "static".
- Make sure each module's header and implementation file match.
- Remove all library-like functionality from main.c, so only
  the actual frontend remains in main.c.
- Add C++ brackets to all header files.

That effectively leaves the various module C files as something like
an "avrdude library", with main.c being the currently only frontend
program for that library.  In theory, it should be possible to write
different frontends using the same library backend functions though.


git-svn-id: svn://svn.savannah.nongnu.org/avrdude/trunk/avrdude@722 81a1dc3b-b13d-400b-aceb-764788c761c2

stk500v2.h

@@ -20,8 +20,12 @@
 
 /* $Id$ */
 
-#ifndef stk500v2_h__
-#define stk500v2_h__
+#ifndef stk500v2_h
+#define stk500v2_h
+
+#ifdef __cplusplus
+extern "C" {
+#endif
 
 void stk500v2_initpgm (PROGRAMMER * pgm);
 void stk500hvsp_initpgm (PROGRAMMER * pgm);
@@ -31,6 +35,10 @@ void stk500v2_dragon_hvsp_initpgm(PROGRAMMER * pgm);
 void stk500v2_dragon_isp_initpgm(PROGRAMMER * pgm);
 void stk500v2_dragon_pp_initpgm(PROGRAMMER * pgm);
 
+#ifdef __cplusplus
+}
+#endif
+
 #endif