Use Clang 16 in MacOS

[gurgenyegoryan]

Hello everyone, to build my MacOS projects I need to use GCC>=12. On x86_64 platforms, everything works, but on ARM, the build passes, but during repair_wheel, it gives an error.

GitHub action

- name: Build wheels
  run: python -m cibuildwheel
  env:
     CIBW_ENVIRONMENT_MACOS: CC=/usr/local/bin/gcc-13 CXX=/usr/local/bin/g++-13 LD_LIBRARY_PATH=/usr/local/lib

Repair wheel command

repair-wheel-command = "delocate-wheel -w fixed_wheels --require-archs {delocate_archs} -w {dest_dir} -v {wheel}"

Error

delocate.delocating.DelocationError: Some missing architectures in wheel
Required arch arm64 missing from /usr/local/Cellar/gcc/13.1.0/lib/gcc/current/libstdc++.6.dylib

Can you help me figure out what I'm doing wrong? For an alternative, I can use Clang 16, install it with brew install llvm, but in this case it gives an error during the build.

GitHub action

- name: Build wheels
  run: python -m cibuildwheel
  env:
      CIBW_ENVIRONMENT_MACOS: CC=/usr/local/opt/llvm/bin/clang CXX=/usr/local/opt/llvm/bin/clang++ LIBRARY_PATH=/usr/local/Cellar/llvm/16.0.6/lib:$LIBRARY_PATH

Error

/usr/local/opt/llvm/bin/clang++ -bundle -undefined dynamic_lookup -g -arch arm64 build/temp.macosx-11.0-arm64-cpython-39/python/lib.o -o build/lib.macosx-11.0-arm64-cpython-39/usearch/compiled.cpython-39-darwin.so -lomp
        ld: warning: ignoring file /usr/local/Cellar/llvm/16.0.6/lib/libomp.dylib, building for macOS-arm64 but attempting to link with file built for macOS-x86_64
        ld: in '/usr/local/Cellar/llvm/16.0.6/lib/libunwind.dylib', building for macOS-arm64 but attempting to link with file built for macOS-x86_64
        clang-16: error: linker command failed with exit code 1 (use -v to see invocation)
        error: command '/usr/local/opt/llvm/bin/clang++' failed with exit code 1
        [end of output]

[joerick]

If you're installing dependencies from brew, you'll probably have to build the arm64 version on an arm64 machine, as homebrew doesn't install non-native architectures. If there's any way to use the xcode toolchain with your project, I expect you'll have a much easier time. According to my machine that's Clang 14, currently.

[gurgenyegoryan]

But how to use GCC>=12 or CLang>=16 in GitHub Action on macOS-11 runner? How to make it so that I can create both ARM and x86_64 builds>? Can you give an example?