GitHub Actions fails to build wheels

[paulmueller]

I am hesitant to write an issue, because I think it might have something to do with GitHub Actions and environment variables (Paths?).

The problem is that cibuildwheel reports several libraries missing, or maybe there are some header files missing?.
For example: https://github.com/DC-analysis/dclab/actions/runs/6406132672/job/17390129343

Expand details to see relevant log excerpt:

Building wheel...
  
      + rm -rf /tmp/cibuildwheel/built_wheel
      + mkdir -p /tmp/cibuildwheel/built_wheel
      + python -m pip wheel /project --wheel-dir=/tmp/cibuildwheel/built_wheel --no-deps
  Processing /project
    Installing build dependencies: started
    Installing build dependencies: still running...
    Installing build dependencies: finished with status 'error'
    error: subprocess-exited-with-error
    
    × pip subprocess to install build dependencies did not run successfully.
    │ exit code: 1
    ╰─> [339 lines of output]
        Collecting cython
          Obtaining dependency information for cython from https://files.pythonhosted.org/packages/03/e9/9cc0c4f0d8a566089d096254cd25168a0db02dd047863a7f995d8d3eefa7/Cython-3.0.2-py2.py3-none-any.whl.metadata
          Using cached Cython-3.0.2-py2.py3-none-any.whl.metadata (3.1 kB)
        Collecting oldest-supported-numpy
          Obtaining dependency information for oldest-supported-numpy from https://files.pythonhosted.org/packages/94/9a/756fef9346e5ca2289cb70d73990b4c9f25446a885c1186cfb93a85e7da0/oldest_supported_numpy-2023.8.3-py3-none-any.whl.metadata
          Using cached oldest_supported_numpy-2023.8.3-py3-none-any.whl.metadata (9.5 kB)
        Collecting setuptools
          Obtaining dependency information for setuptools from https://files.pythonhosted.org/packages/bb/26/7945080113158354380a12ce26873dd6c1ebd88d47f5bc24e2c5bb38c16a/setuptools-68.2.2-py3-none-any.whl.metadata
          Using cached setuptools-68.2.2-py3-none-any.whl.metadata (6.3 kB)
        Collecting wheel
          Obtaining dependency information for wheel from https://files.pythonhosted.org/packages/b8/8b/31273bf66016be6ad22bb7345c37ff350276cfd46e389a0c2ac5da9d9073/wheel-0.41.2-py3-none-any.whl.metadata
          Using cached wheel-0.41.2-py3-none-any.whl.metadata (2.2 kB)
        Collecting setuptools_scm[toml]>=6.2
          Obtaining dependency information for setuptools_scm[toml]>=6.2 from https://files.pythonhosted.org/packages/0e/a3/b9a8b0adfe672bf0df5901707aa929d30a97ee390ba651910186776746d2/setuptools_scm-8.0.4-py3-none-any.whl.metadata
          Using cached setuptools_scm-8.0.4-py3-none-any.whl.metadata (6.4 kB)
        Collecting numpy==1.19.3 (from oldest-supported-numpy)
          Downloading numpy-1.19.3.zip (7.3 MB)
             ━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━━ 7.3/7.3 MB 37.9 MB/s eta 0:00:00
          Installing build dependencies: started
          Installing build dependencies: finished with status 'done'
          Getting requirements to build wheel: started
          Getting requirements to build wheel: finished with status 'done'
          Preparing metadata (pyproject.toml): started
          Preparing metadata (pyproject.toml): still running...
          Preparing metadata (pyproject.toml): finished with status 'error'
          error: subprocess-exited-with-error
        
          × Preparing metadata (pyproject.toml) did not run successfully.
          │ exit code: 1
          ╰─> [299 lines of output]
              Processing numpy/random/_bounded_integers.pxd.in
              Processing numpy/random/_pcg64.pyx
              Processing numpy/random/_mt19937.pyx
              Processing numpy/random/_philox.pyx
              Processing numpy/random/_generator.pyx
              Processing numpy/random/_bounded_integers.pyx.in
              Processing numpy/random/_common.pyx
              Processing numpy/random/_sfc64.pyx
              Processing numpy/random/bit_generator.pyx
              Processing numpy/random/mtrand.pyx
              Cythonizing sources
              blas_opt_info:
              blas_mkl_info:
              customize UnixCCompiler
                libraries mkl_rt not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              blis_info:
                libraries blis not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              openblas_info:
                libraries openblas not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              atlas_3_10_blas_threads_info:
              Setting PTATLAS=ATLAS
                libraries tatlas not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64/sse2', '/usr/lib64', '/usr/lib/sse2', '/usr/lib', '/usr/lib/sse2', '/usr/lib/']
                NOT AVAILABLE
        
              atlas_3_10_blas_info:
                libraries satlas not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64/sse2', '/usr/lib64', '/usr/lib/sse2', '/usr/lib', '/usr/lib/sse2', '/usr/lib/']
                NOT AVAILABLE
        
              atlas_blas_threads_info:
              Setting PTATLAS=ATLAS
                libraries ptf77blas,ptcblas,atlas not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64/sse2', '/usr/lib64', '/usr/lib/sse2', '/usr/lib', '/usr/lib/sse2', '/usr/lib/']
                NOT AVAILABLE
        
              atlas_blas_info:
                libraries f77blas,cblas,atlas not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64/sse2', '/usr/lib64', '/usr/lib/sse2', '/usr/lib', '/usr/lib/sse2', '/usr/lib/']
                NOT AVAILABLE
        
              accelerate_info:
                NOT AVAILABLE
        
              blas_info:
                libraries blas not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              blas_src_info:
                NOT AVAILABLE
        
                NOT AVAILABLE
        
              non-existing path in 'numpy/distutils': 'site.cfg'
              lapack_opt_info:
              lapack_mkl_info:
                libraries mkl_rt not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              openblas_lapack_info:
                libraries openblas not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              openblas_clapack_info:
                libraries openblas,lapack not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              flame_info:
                libraries flame not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              atlas_3_10_threads_info:
              Setting PTATLAS=ATLAS
                libraries lapack_atlas not found in /opt/python/pp39-pypy39_pp73/lib
                libraries tatlas,tatlas not found in /opt/python/pp39-pypy39_pp73/lib
                libraries lapack_atlas not found in /usr/local/lib64
                libraries tatlas,tatlas not found in /usr/local/lib64
                libraries lapack_atlas not found in /usr/local/lib
                libraries tatlas,tatlas not found in /usr/local/lib
                libraries lapack_atlas not found in /usr/lib64/sse2
                libraries tatlas,tatlas not found in /usr/lib64/sse2
                libraries lapack_atlas not found in /usr/lib64
                libraries tatlas,tatlas not found in /usr/lib64
                libraries lapack_atlas not found in /usr/lib/sse2
                libraries tatlas,tatlas not found in /usr/lib/sse2
                libraries lapack_atlas not found in /usr/lib
                libraries tatlas,tatlas not found in /usr/lib
                libraries lapack_atlas not found in /usr/lib/sse2
                libraries tatlas,tatlas not found in /usr/lib/sse2
                libraries lapack_atlas not found in /usr/lib/
                libraries tatlas,tatlas not found in /usr/lib/
              <class 'numpy.distutils.system_info.atlas_3_10_threads_info'>
                NOT AVAILABLE
        
              atlas_3_10_info:
                libraries lapack_atlas not found in /opt/python/pp39-pypy39_pp73/lib
                libraries satlas,satlas not found in /opt/python/pp39-pypy39_pp73/lib
                libraries lapack_atlas not found in /usr/local/lib64
                libraries satlas,satlas not found in /usr/local/lib64
                libraries lapack_atlas not found in /usr/local/lib
                libraries satlas,satlas not found in /usr/local/lib
                libraries lapack_atlas not found in /usr/lib64/sse2
                libraries satlas,satlas not found in /usr/lib64/sse2
                libraries lapack_atlas not found in /usr/lib64
                libraries satlas,satlas not found in /usr/lib64
                libraries lapack_atlas not found in /usr/lib/sse2
                libraries satlas,satlas not found in /usr/lib/sse2
                libraries lapack_atlas not found in /usr/lib
                libraries satlas,satlas not found in /usr/lib
                libraries lapack_atlas not found in /usr/lib/sse2
                libraries satlas,satlas not found in /usr/lib/sse2
                libraries lapack_atlas not found in /usr/lib/
                libraries satlas,satlas not found in /usr/lib/
              <class 'numpy.distutils.system_info.atlas_3_10_info'>
                NOT AVAILABLE
        
              atlas_threads_info:
              Setting PTATLAS=ATLAS
                libraries lapack_atlas not found in /opt/python/pp39-pypy39_pp73/lib
                libraries ptf77blas,ptcblas,atlas not found in /opt/python/pp39-pypy39_pp73/lib
                libraries lapack_atlas not found in /usr/local/lib64
                libraries ptf77blas,ptcblas,atlas not found in /usr/local/lib64
                libraries lapack_atlas not found in /usr/local/lib
                libraries ptf77blas,ptcblas,atlas not found in /usr/local/lib
                libraries lapack_atlas not found in /usr/lib64/sse2
                libraries ptf77blas,ptcblas,atlas not found in /usr/lib64/sse2
                libraries lapack_atlas not found in /usr/lib64
                libraries ptf77blas,ptcblas,atlas not found in /usr/lib64
                libraries lapack_atlas not found in /usr/lib/sse2
                libraries ptf77blas,ptcblas,atlas not found in /usr/lib/sse2
                libraries lapack_atlas not found in /usr/lib
                libraries ptf77blas,ptcblas,atlas not found in /usr/lib
                libraries lapack_atlas not found in /usr/lib/sse2
                libraries ptf77blas,ptcblas,atlas not found in /usr/lib/sse2
                libraries lapack_atlas not found in /usr/lib/
                libraries ptf77blas,ptcblas,atlas not found in /usr/lib/
              <class 'numpy.distutils.system_info.atlas_threads_info'>
                NOT AVAILABLE
        
              atlas_info:
                libraries lapack_atlas not found in /opt/python/pp39-pypy39_pp73/lib
                libraries f77blas,cblas,atlas not found in /opt/python/pp39-pypy39_pp73/lib
                libraries lapack_atlas not found in /usr/local/lib64
                libraries f77blas,cblas,atlas not found in /usr/local/lib64
                libraries lapack_atlas not found in /usr/local/lib
                libraries f77blas,cblas,atlas not found in /usr/local/lib
                libraries lapack_atlas not found in /usr/lib64/sse2
                libraries f77blas,cblas,atlas not found in /usr/lib64/sse2
                libraries lapack_atlas not found in /usr/lib64
                libraries f77blas,cblas,atlas not found in /usr/lib64
                libraries lapack_atlas not found in /usr/lib/sse2
                libraries f77blas,cblas,atlas not found in /usr/lib/sse2
                libraries lapack_atlas not found in /usr/lib
                libraries f77blas,cblas,atlas not found in /usr/lib
                libraries lapack_atlas not found in /usr/lib/sse2
                libraries f77blas,cblas,atlas not found in /usr/lib/sse2
                libraries lapack_atlas not found in /usr/lib/
                libraries f77blas,cblas,atlas not found in /usr/lib/
              <class 'numpy.distutils.system_info.atlas_info'>
                NOT AVAILABLE
        
              lapack_info:
                libraries lapack not found in ['/opt/python/pp39-pypy39_pp73/lib', '/usr/local/lib64', '/usr/local/lib', '/usr/lib64', '/usr/lib', '/usr/lib/']
                NOT AVAILABLE
        
              lapack_src_info:
                NOT AVAILABLE
        
                NOT AVAILABLE
        
              numpy_linalg_lapack_lite:
                FOUND:
                  language = c
                  define_macros = [('HAVE_BLAS_ILP64', None), ('BLAS_SYMBOL_SUFFIX', '64_')]
        
              running dist_info
              running build_src
              build_src
              building py_modules sources
              creating build
              creating build/src.linux-x86_64-3.9
              creating build/src.linux-x86_64-3.9/numpy
              creating build/src.linux-x86_64-3.9/numpy/distutils
              building library "npymath" sources
              creating build/src.linux-x86_64-3.9/numpy/core
              creating build/src.linux-x86_64-3.9/numpy/core/src
              creating build/src.linux-x86_64-3.9/numpy/core/src/npymath
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npymath/npy_math_internal.h
                adding 'build/src.linux-x86_64-3.9/numpy/core/src/npymath' to include_dirs.
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npymath/ieee754.c
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npymath/npy_math_complex.c
              None - nothing done with h_files = ['build/src.linux-x86_64-3.9/numpy/core/src/npymath/npy_math_internal.h']
              building library "npysort" sources
              creating build/src.linux-x86_64-3.9/numpy/core/src/common
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/common/npy_sort.h
                adding 'build/src.linux-x86_64-3.9/numpy/core/src/common' to include_dirs.
              creating build/src.linux-x86_64-3.9/numpy/core/src/npysort
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npysort/quicksort.c
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npysort/mergesort.c
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npysort/timsort.c
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npysort/heapsort.c
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npysort/radixsort.c
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/common/npy_partition.h
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npysort/selection.c
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/common/npy_binsearch.h
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/npysort/binsearch.c
              None - nothing done with h_files = ['build/src.linux-x86_64-3.9/numpy/core/src/common/npy_sort.h', 'build/src.linux-x86_64-3.9/numpy/core/src/common/npy_partition.h', 'build/src.linux-x86_64-3.9/numpy/core/src/common/npy_binsearch.h']
              building library "npyrandom" sources
              building extension "numpy.core._multiarray_tests" sources
              creating build/src.linux-x86_64-3.9/numpy/core/src/multiarray
              conv_template:> build/src.linux-x86_64-3.9/numpy/core/src/multiarray/_multiarray_tests.c
              building extension "numpy.core._multiarray_umath" sources
              Running from numpy source directory.
              setup.py:480: UserWarning: Unrecognized setuptools command, proceeding with generating Cython sources and expanding templates
                run_build = parse_setuppy_commands()
              /tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/system_info.py:1914: UserWarning:
                  Optimized (vendor) Blas libraries are not found.
                  Falls back to netlib Blas library which has worse performance.
                  A better performance should be easily gained by switching
                  Blas library.
                if self._calc_info(blas):
              /tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/system_info.py:1914: UserWarning:
                  Blas (http://www.netlib.org/blas/) libraries not found.
                  Directories to search for the libraries can be specified in the
                  numpy/distutils/site.cfg file (section [blas]) or by setting
                  the BLAS environment variable.
                if self._calc_info(blas):
              /tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/system_info.py:1914: UserWarning:
                  Blas (http://www.netlib.org/blas/) sources not found.
                  Directories to search for the sources can be specified in the
                  numpy/distutils/site.cfg file (section [blas_src]) or by setting
                  the BLAS_SRC environment variable.
                if self._calc_info(blas):
              /tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/system_info.py:1748: UserWarning:
                  Lapack (http://www.netlib.org/lapack/) libraries not found.
                  Directories to search for the libraries can be specified in the
                  numpy/distutils/site.cfg file (section [lapack]) or by setting
                  the LAPACK environment variable.
                return getattr(self, '_calc_info_{}'.format(name))()
              /tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/system_info.py:1748: UserWarning:
                  Lapack (http://www.netlib.org/lapack/) sources not found.
                  Directories to search for the sources can be specified in the
                  numpy/distutils/site.cfg file (section [lapack_src]) or by setting
                  the LAPACK_SRC environment variable.
                return getattr(self, '_calc_info_{}'.format(name))()
              /tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/_distutils/dist.py:275: UserWarning: Unknown distribution option: 'define_macros'
                warnings.warn(msg)
              Traceback (most recent call last):
                File "/opt/_internal/pp39-pypy39_pp73/lib/pypy3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 353, in <module>
                  main()
                File "/opt/_internal/pp39-pypy39_pp73/lib/pypy3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 335, in main
                  json_out['return_val'] = hook(**hook_input['kwargs'])
                File "/opt/_internal/pp39-pypy39_pp73/lib/pypy3.9/site-packages/pip/_vendor/pyproject_hooks/_in_process/_in_process.py", line 149, in prepare_metadata_for_build_wheel
                  return hook(metadata_directory, config_settings)
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/build_meta.py", line 157, in prepare_metadata_for_build_wheel
                  self.run_setup()
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/build_meta.py", line 248, in run_setup
                  super(_BuildMetaLegacyBackend,
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/build_meta.py", line 142, in run_setup
                  exec(compile(code, __file__, 'exec'), locals())
                File "setup.py", line 508, in <module>
                  setup_package()
                File "setup.py", line 500, in setup_package
                  setup(**metadata)
                File "/tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/core.py", line 169, in setup
                  return old_setup(**new_attr)
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/__init__.py", line 165, in setup
                  return distutils.core.setup(**attrs)
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/_distutils/core.py", line 148, in setup
                  dist.run_commands()
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/_distutils/dist.py", line 967, in run_commands
                  self.run_command(cmd)
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/_distutils/dist.py", line 986, in run_command
                  cmd_obj.run()
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/command/dist_info.py", line 31, in run
                  egg_info.run()
                File "/tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/command/egg_info.py", line 24, in run
                  self.run_command("build_src")
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/_distutils/cmd.py", line 313, in run_command
                  self.distribution.run_command(command)
                File "/tmp/pip-build-env-l5x1pl5t/overlay/lib/pypy3.9/site-packages/setuptools/_distutils/dist.py", line 986, in run_command
                  cmd_obj.run()
                File "/tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/command/build_src.py", line 144, in run
                  self.build_sources()
                File "/tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/command/build_src.py", line 161, in build_sources
                  self.build_extension_sources(ext)
                File "/tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/command/build_src.py", line 318, in build_extension_sources
                  sources = self.generate_sources(sources, ext)
                File "/tmp/pip-install-jduvxo5p/numpy_6a9aa07993354adf8836d8cb73f3a23a/numpy/distutils/command/build_src.py", line 378, in generate_sources
                  source = func(extension, build_dir)
                File "numpy/core/setup.py", line 436, in generate_config_h
                  moredefs, ignored = cocache.check_types(config_cmd, ext, build_dir)
                File "numpy/core/setup.py", line 47, in check_types
                  out = check_types(*a, **kw)
                File "numpy/core/setup.py", line 292, in check_types
                  raise SystemError(
              SystemError: Cannot compile 'Python.h'. Perhaps you need to install pypy-dev|pypy-devel.
              [end of output]
        
          note: This error originates from a subprocess, and is likely not a problem with pip.
        error: metadata-generation-failed
        
        × Encountered error while generating package metadata.
        ╰─> See above for output.
        
        note: This is an issue with the package mentioned above, not pip.
        hint: See above for details.
        [end of output]
    
    note: This error originates from a subprocess, and is likely not a problem with pip.
  error: subprocess-exited-with-error
  
  × pip subprocess to install build dependencies did not run successfully.
  │ exit code: 1
  ╰─> See above for output.
  
  note: This error originates from a subprocess, and is likely not a problem with pip.
Error: Command ['python', '-m', 'pip', 'wheel', PurePosixPath('/project'), '--wheel-dir=/tmp/cibuildwheel/built_wheel', '--no-deps'] failed with code 1. 

                                                             ✕ 77.17s
Checking for common errors...
Error: Process completed with exit code 1.

My actions.yml file: https://github.com/DC-analysis/dclab/blob/426a38000eb87ff4759216d6d27e33603ddcd473/.github/workflows/deploy_pypi.yml

Thanks for your help 🙏

[henryiii]

You are building NumPy. You don’t want to build NumPy. You might want to skip musllinux. Also, modern NumPy has a way to avoid the oldest supported NumPy (which might be why you are trying to build an old NumPy), so your python 3.9+ code can build with the latest NumPy and just target your actual minimum.

[Czaki]

Link to numpy documentation https://numpy.org/doc/stable/release/1.25.0-notes.html#compiling-against-the-numpy-c-api-is-now-backwards-compatible-by-default

[paulmueller]

Thanks for explaining and thanks for the link @Czaki
I managed to get it working with the following lines in my pyproject.toml:

[tool.cibuildwheel]
# Only build on platforms that numpy supports and that people will actually use.
build = "cp*"
skip = "*musllinux* *32 *i686 *_ppc64le *_s390x"

[henryiii]

You don't actually have to skip *_ppc64le *_s390x", as you have to emulate or build on those to begin with. You can also set archs to auto64 instead of setting skips for the 32 bit stuff.