strerror_r error on MSYS2 with clang

[stevefan1999-personal]

I was trying to compile aubio for Ardour however, I see that there is no translation of strerror_r in MSYS2 clang:

$ CC=clang CXX=clang++ scripts/build_mingw
...
[ 81/243] Compiling tests/src/io/test-source_apple_audio.c
../src/io/source_wavread.c:101:5: warning: implicit declaration of function 'strerror_r' is invalid in C99 [-Wimplicit-function-declaration]
    AUBIO_STRERR("source_wavread: Failed opening %s (%s)\n", s->path, errorstr);
    ^
../src/aubio_priv.h:353:5: note: expanded from macro 'AUBIO_STRERR'
    AUBIO_STRERROR(errno, errorstr, sizeof(errorstr)); \
    ^
../src/aubio_priv.h:345:39: note: expanded from macro 'AUBIO_STRERROR'
#define AUBIO_STRERROR(errno,buf,len) strerror_r(errno, buf, len)
                                      ^
../src/io/source_wavread.c:134:7: warning: implicit declaration of function 'strerror_r' is invalid in C99 [-Wimplicit-function-declaration]
      AUBIO_STRERR("source_wavread: Failed opening %s (could not seek past JUNK Chunk: %s)\n",
      ^
../src/aubio_priv.h:353:5: note: expanded from macro 'AUBIO_STRERR'
    AUBIO_STRERROR(errno, errorstr, sizeof(errorstr)); \
    ^
../src/aubio_priv.h:345:39: note: expanded from macro 'AUBIO_STRERROR'
#define AUBIO_STRERROR(errno,buf,len) strerror_r(errno, buf, len)
                                      ^
../src/io/source_wavread.c:262:7: warning: implicit declaration of function 'strerror_r' is invalid in C99 [-Wimplicit-function-declaration]
      AUBIO_STRERR("source_wavread: could not seek past unknown chunk in %s (%s)\n",
      ^
../src/aubio_priv.h:353:5: note: expanded from macro 'AUBIO_STRERR'
    AUBIO_STRERROR(errno, errorstr, sizeof(errorstr)); \
    ^
../src/aubio_priv.h:345:39: note: expanded from macro 'AUBIO_STRERROR'
#define AUBIO_STRERROR(errno,buf,len) strerror_r(errno, buf, len)
                                      ^
../src/io/source_wavread.c:443:5: warning: implicit declaration of function 'strerror_r' is invalid in C99 [-Wimplicit-function-declaration]
    AUBIO_STRERR("source_wavread: could not seek %s at %d (%s)\n", s->path, pos, errorstr);
    ^
../src/aubio_priv.h:353:5: note: expanded from macro 'AUBIO_STRERR'
    AUBIO_STRERROR(errno, errorstr, sizeof(errorstr)); \
    ^
../src/aubio_priv.h:345:39: note: expanded from macro 'AUBIO_STRERROR'
#define AUBIO_STRERROR(errno,buf,len) strerror_r(errno, buf, len)
                                      ^
../src/io/source_wavread.c:464:5: warning: implicit declaration of function 'strerror_r' is invalid in C99 [-Wimplicit-function-declaration]
    AUBIO_STRERR("source_wavread: could not close %s (%s)\n", s->path, errorstr);
    ^
../src/aubio_priv.h:353:5: note: expanded from macro 'AUBIO_STRERR'
    AUBIO_STRERROR(errno, errorstr, sizeof(errorstr)); \
    ^
../src/aubio_priv.h:345:39: note: expanded from macro 'AUBIO_STRERROR'
#define AUBIO_STRERROR(errno,buf,len) strerror_r(errno, buf, len)
                                      ^
5 warnings generated.
...
[132/243] Compiling aubio.pc.in
ld.lld: error: undefined symbol: strerror_r
>>> referenced by ../src/io/sink_flac.c:146
>>>               src/io/sink_flac.c.1.o:(aubio_sink_flac_open)
>>> referenced by ../src/io/sink_flac.c:347
>>>               src/io/sink_flac.c.1.o:(aubio_sink_flac_close)
>>> referenced by ../src/io/sink_vorbis.c:122
>>>               src/io/sink_vorbis.c.1.o:(aubio_sink_vorbis_open)
>>> referenced 12 more times

Not sure if this helps

Although using strerror_r should have had it the other way given I have GCC-based MinGW, I basically cannot since only clang supported aarch64 (which I will attempt later, but I need a x86_64 build first)

[Biswa96]

This issue can be fixed using #349. aubio is available in msys2/mingw packages https://packages.msys2.org/base/mingw-w64-aubio. For clang environment, LDFLAGS="-pthread" is required.

Ardour requires some dependencies. I hope that it will be available soon in mingw packages.