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Description
Thanks for the great project! CPython 3.13.0 is scheduled for release in 3 days (2024-10-01). Testing cbitstruct with the latest 3.13 release candidate (3.13.0rc2), the project fails to compile. Here's the build output produced by running the latest version of cibuildwheel (2.21.1):
× Building wheel for cbitstruct (pyproject.toml) did not run successfully.
│ exit code: 1
╰─> [24 lines of output]
running bdist_wheel
running build
running build_py
creating build/lib.linux-x86_64-cpython-313/cbitstruct
copying cbitstruct/__init__.py -> build/lib.linux-x86_64-cpython-313/cbitstruct
creating build/lib.linux-x86_64-cpython-313/cbitstruct/tests
copying cbitstruct/tests/test_api.py -> build/lib.linux-x86_64-cpython-313/cbitstruct/tests
copying cbitstruct/tests/test_bitstruct.py -> build/lib.linux-x86_64-cpython-313/cbitstruct/tests
copying cbitstruct/tests/test_perf.py -> build/lib.linux-x86_64-cpython-313/cbitstruct/tests
copying cbitstruct/tests/__init__.py -> build/lib.linux-x86_64-cpython-313/cbitstruct/tests
copying cbitstruct/tests/test_cornercase.py -> build/lib.linux-x86_64-cpython-313/cbitstruct/tests
copying cbitstruct/tests/test_against_bitstruct.py -> build/lib.linux-x86_64-cpython-313/cbitstruct/tests
running build_ext
building 'cbitstruct._cbitstruct' extension
creating build/temp.linux-x86_64-cpython-313/cbitstruct
gcc -pthread -fno-strict-overflow -Wsign-compare -DNDEBUG -g -O3 -Wall -fPIC -Icbitstruct/ -I/opt/_internal/cpython-3.13.0rc2/include/python3.13 -c cbitstruct/_cbitstruct.c -o build/temp.linux-x86_64-cpython-313/cbitstruct/_cbitstruct.o -std=c11 -Wall -Werror -O3
In file included from cbitstruct/_cbitstruct.c:833:
cbitstruct/clinic/_cbitstruct.c.37.h: In function ‘CompiledFormat_unpack’:
cbitstruct/clinic/_cbitstruct.c.37.h:83:10: error: implicit declaration of function ‘_PyArg_ParseStackAndKeywords’; did you mean ‘PyArg_ParseTupleAndKeywords’? [-Werror=implicit-function-declaration]
83 | if (!_PyArg_ParseStackAndKeywords(args, nargs, kwnames, &_parser,
| ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
| PyArg_ParseTupleAndKeywords
cc1: all warnings being treated as errors
error: command '/opt/rh/devtoolset-10/root/usr/bin/gcc' failed with exit code 1
[end of output]
The issue is that cbitstruct uses _PyArg_ParseStackAndKeywords(), which is a private Python C API that has been removed in Python 3.13. A now-closed CPython issue discussing this removal can be found here: python/cpython#112136. The gist of the discussion is that the removal won't be reverted and users of the API must find an alternative.
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