diff --git a/build.sh b/build.sh
new file mode 100755
index 00000000..d3cb3c2f
--- /dev/null
+++ b/build.sh
@@ -0,0 +1,79 @@
+#!/bin/sh
+#
+# Build script for Unix-like systems, using the CMake subsystem
+#
+# This script covers some common cases. It does *not* install any
+# prerequisites though.
+#
+# For documentation of AVRDUDE's build system, please refer to the
+# Wiki:
+#
+# https://github.com/avrdudes/avrdude/wiki
+
+# Determine OS type
+#
+# So far, this script tries to handle three different Unix-like
+# systems:
+#
+# Linux
+# FreeBSD
+# Darwin (aka. MacOS)
+#
+# On Linux, if the machine is ARM-based, LINUXSPI and LINUXGPIO are
+# enabled.
+# On MacOS, an attempt is made to find out whether Mac ports or brew
+# are in place, and are assumed to have install the prerequisites.
+
+ostype=$(uname | tr '[A-Z]' '[a-z]')
+
+build_type=RelWithDebInfo
+# build_type=Release # no debug info
+
+extra_enable=""
+build_flags=""
+
+case "${ostype}" in
+    linux)
+	# try to find out whether this is an Embedded Linux
+	# platform (e.g. Raspberry Pi)
+	machine=$(uname -m)
+	if expr "${machine}" : 'arm' >/dev/null
+	then
+	    extra_enable="${extra_enable} -D HAVE_LINUXGPIO=ON -D HAVE_LINUXSPI=ON"
+	fi
+	;;
+
+    darwin)
+	# determine whether we are running using Mac Ports
+	# if not, assume Mac Brew
+	if [ -f /opt/local/bin/port ]
+	then
+	    build_flags="${build_flags} -D CMAKE_C_FLAGS=-I/opt/local/include -D CMAKE_EXE_LINKER_FLAGS=-L/opt/local/lib"
+	else
+	    build_flags="${build_flags} -D CMAKE_C_FLAGS=-I/usr/local/include -D CMAKE_EXE_LINKER_FLAGS=-L/usr/local/Cellar"
+	fi
+	;;
+
+    freebsd)
+	build_flags="${build_flags} -D CMAKE_C_FLAGS=-I/usr/local/include -D CMAKE_EXE_LINKER_FLAGS=-L/usr/local/lib"
+	;;
+esac
+
+cd src
+
+cmake ${build_flags} ${extra_enable} -D CMAKE_BUILD_TYPE=${build_type} -B build_${ostype} ||\
+    { echo "CMake failed."; exit 1; }
+cmake --build build_${ostype} ||\
+    { echo "Build failed."; exit 1; }
+
+cat <<EOF
+
+Build succeeded.
+
+Run
+
+sudo cmake --build build_${ostype} --target install
+
+to install.
+
+EOF