Doesn't compile on Alpine Linux.

[nerap528]

I'm using Alpine Linux as my daily driver.
There is an error when when compiling this project.

Here is the shell output:

~/Git/libmixed $ mkdir build
~/Git/libmixed $ cd build/
~/Git/libmixed/build $ cmake ..
CMake Deprecation Warning at CMakeLists.txt:1 (cmake_minimum_required):
  Compatibility with CMake < 3.5 will be removed from a future version of
  CMake.

  Update the VERSION argument <min> value or use a ...<max> suffix to tell
  CMake that the project does not need compatibility with older versions.


-- The C compiler identification is GNU 13.2.1
-- Detecting C compiler ABI info
-- Detecting C compiler ABI info - done
-- Check for working C compiler: /usr/bin/cc - skipped
-- Detecting C compile features
-- Detecting C compile features - done
CMake Warning (dev) at CMakeLists.txt:19 (exec_program):
  Policy CMP0153 is not set: The exec_program command should not be called.
  Run "cmake --help-policy CMP0153" for policy details.  Use the cmake_policy
  command to set the policy and suppress this warning.

  Use execute_process() instead.
This warning is for project developers.  Use -Wno-dev to suppress it.

-- Building 2.0.g1b08989
-- Enabling SSE
-- Enabling dynamically linked plugins
-- Found mpg123: /usr/include
-- Found out123: /usr/include
-- Found Curses: /usr/lib/libcurses.so
-- Could NOT find Doxygen (missing: DOXYGEN_EXECUTABLE)
-- Cannot build documentation
-- Configuring done (0.4s)
-- Generating done (0.0s)
-- Build files have been written to: /home/user/Git/libmixed/build
~/Git/libmixed/build $ make
[  1%] Building C object CMakeFiles/samplerate.dir/libsamplerate/samplerate.c.o
[  3%] Building C object CMakeFiles/samplerate.dir/libsamplerate/src_linear.c.o
[  4%] Building C object CMakeFiles/samplerate.dir/libsamplerate/src_sinc.c.o
[  6%] Building C object CMakeFiles/samplerate.dir/libsamplerate/src_zoh.c.o
[  6%] Built target samplerate
[  8%] Building C object CMakeFiles/spiralfft.dir/spiralfft/sse/spiral_fft_float.c.o
[  9%] Building C object CMakeFiles/spiralfft.dir/spiralfft/sse/spiral_private.c.o
[  9%] Built target spiralfft
[ 11%] Building C object CMakeFiles/mixed.dir/src/biquad.c.o
/home/user/Git/libmixed/src/biquad.c:8:16: error: the call requires 'ifunc', which is not supported by this target
    8 | VECTORIZE void biquad_process(struct mixed_buffer *input, struct mixed_buffer *output, struct biquad_data *state){
      |                ^~~~~~~~~~~~~~
make[2]: *** [CMakeFiles/mixed.dir/build.make:76: CMakeFiles/mixed.dir/src/biquad.c.o] Error 1
make[1]: *** [CMakeFiles/Makefile2:158: CMakeFiles/mixed.dir/all] Error 2
make: *** [Makefile:136: all] Error 2
~/Git/libmixed/build $

After deleting the directiory, changing /usr/bin/cc to clang and running cmake again, the compilation goes further, but eventually fails with following output:

[ 52%] Building C object CMakeFiles/mixed.dir/src/segments/pitch.c.o
cc: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]
[ 54%] Building C object CMakeFiles/mixed.dir/src/segments/plane_mixer.c.o
cc: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]
[ 55%] Building C object CMakeFiles/mixed.dir/src/segments/quantize.c.o
cc: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]
[ 57%] Building C object CMakeFiles/mixed.dir/src/segments/queue.c.o
cc: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]
[ 59%] Building C object CMakeFiles/mixed.dir/src/segments/repeat.c.o
cc: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]
[ 60%] Building C object CMakeFiles/mixed.dir/src/segments/space_mixer.c.o
cc: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]
[ 62%] Building C object CMakeFiles/mixed.dir/src/segments/speed_change.c.o
cc: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]
[ 63%] Building C object CMakeFiles/mixed.dir/src/segments/volume_control.c.o
cc: warning: argument unused during compilation: '-static-libgcc' [-Wunused-command-line-argument]
[ 63%] Built target mixed
[ 63%] Built target samplerate
[ 63%] Built target spiralfft
[ 65%] Linking C shared library libmixed.so
[ 67%] Linking C static library libmixed.a
`.text.calculate_volumes' referenced in section `.text' of CMakeFiles/mixed.dir/src/segments/space_mixer.c.o: defined in discarded section `.text.calculate_volumes[calculate_volumes]' of CMakeFiles/mixed.dir/src/segments/space_mixer.c.o
`.text.calculate_pitch_shift' referenced in section `.text' of CMakeFiles/mixed.dir/src/segments/space_mixer.c.o: defined in discarded section `.text.calculate_pitch_shift[calculate_pitch_shift]' of CMakeFiles/mixed.dir/src/segments/space_mixer.c.o
/usr/bin/ld: libmixed.so.2.0-g1b08989: no symbol version section for versioned symbol `memset@GLIBC_2.2.5'
cc: error: linker command failed with exit code 1 (use -v to see invocation)
make[2]: *** [CMakeFiles/mixed_shared.dir/build.make:159: libmixed.so.2.0-g1b08989] Error 1
make[1]: *** [CMakeFiles/Makefile2:214: CMakeFiles/mixed_shared.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
[ 67%] Built target mixed_static
make: *** [Makefile:136: all] Error 2

P.S. With Trial theres finally a portable game engine. As far as I can tell, it works perfectly on Alpine Linux.

[Shinmera]

Well as the output shows it tries to statically link glibc, which won't work for musl.

I personally don't care about musl, so you or someone else will have to submit an appropriate patch for the build.