Merged revision(s) 22708 from trunk/OpenMPT:

[Fix] build: Autotools: MinGW: MinGW does not define _UNICODE in its CRT headers when UNICODE is defined, like Microsoft does. #define _UNICODE manually when passing -municode.
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git-svn-id: https://source.openmpt.org/svn/openmpt/branches/OpenMPT-1.30@22712 56274372-70c3-4bfc-bfc3-4c3a0b034d27

build/autotools/configure.ac

@@ -41,7 +41,7 @@ case $host_os in
   LIBOPENMPT_WIN32_LIBS="-lole32 -lrpcrt4"
   LIBOPENMPT_LIBS_PRIVATE_WIN32="-lole32 -lrpcrt4"
   OPENMPT123_WIN32_LIBS=-lwinmm
-  WIN32_CPPFLAGS=
+  WIN32_CPPFLAGS="-D_UNICODE"
   WIN32_CXXFLAGS="-municode -mthreads"
   WIN32_CFLAGS="-municode -mthreads"
   WIN32_CONSOLE_CXXFLAGS=-mconsole