gh-116869: Fix test_cext for Free Threading

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• Issue: Python 3.12.2 headers contain non-C90-compliant code #116869

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!buildbot ARM64 MacOS M1 NoGIL

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit b641d4b 🤖

The command will test the builders whose names match following regular expression: ARM64 MacOS M1 NoGIL

The builders matched are:

• ARM64 MacOS M1 NoGIL PR

[vstinner]

Oh, there is another error:

  × python setup.py bdist_wheel did not run successfully.
  │ exit code: 1
  ╰─> [23 lines of output]
      CC env var: 'gcc'
      CFLAGS env var: <missing>
      extra_compile_args: ['-Werror', '-DMODULE_NAME=_test_limited_c11_cext', '-std=c11', '-DPy_LIMITED_API=0x30d00a5']
      running bdist_wheel
      running build
      running build_ext
      building '_test_limited_c11_cext' extension
      creating build
      creating build/temp.macosx-14.0-arm64-cpython-313-pydebug
      gcc -fno-strict-overflow -Wsign-compare -g -Og -Wall -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/build/test_python_59797æ/tempcwd/env/include -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build -c extension.c -o build/temp.macosx-14.0-arm64-cpython-313-pydebug/extension.o -Werror -DMODULE_NAME=_test_limited_c11_cext -std=c11 -DPy_LIMITED_API=0x30d00a5
      In file included from extension.c:7:
      In file included from /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/Python.h:58:
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:317:22: error: call to undeclared function '_Py_atomic_load_uint32_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          uint32_t local = _Py_atomic_load_uint32_relaxed(&ob->ob_ref_local);
                           ^
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:321:25: error: call to undeclared function '_Py_atomic_load_ssize_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          Py_ssize_t shared = _Py_atomic_load_ssize_relaxed(&ob->ob_ref_shared);
                              ^
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:432:5: error: call to undeclared function '_Py_atomic_store_ssize_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          _Py_atomic_store_ssize_relaxed(&ob->ob_size, size);
          ^
      3 errors generated.
      error: command '/usr/bin/gcc' failed with exit code 1
      [end of output]

[vstinner]

!buildbot ARM64 MacOS M1 NoGIL

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit 821326d 🤖

The command will test the builders whose names match following regular expression: ARM64 MacOS M1 NoGIL

The builders matched are:

• ARM64 MacOS M1 NoGIL PR

[vstinner]

In fact, test_build_limited() and test_build_c11() fail with:

      gcc -fno-strict-overflow -Wsign-compare -g -Og -Wall -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/build/test_python_89802æ/tempcwd/env/include -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build -c extension.c -o build/temp.macosx-14.0-arm64-cpython-313-pydebug/extension.o -DMODULE_NAME=_test_limited_c11_cext -std=c11 -DPy_LIMITED_API=0x30d00a5
      In file included from extension.c:7:
      In file included from /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/Python.h:58:
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:317:22: error: call to undeclared function '_Py_atomic_load_uint32_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          uint32_t local = _Py_atomic_load_uint32_relaxed(&ob->ob_ref_local);
                           ^
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:321:25: error: call to undeclared function '_Py_atomic_load_ssize_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          Py_ssize_t shared = _Py_atomic_load_ssize_relaxed(&ob->ob_ref_shared);
                              ^
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:432:5: error: call to undeclared function '_Py_atomic_store_ssize_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          _Py_atomic_store_ssize_relaxed(&ob->ob_size, size);
          ^
      3 errors generated.

and

      gcc -fno-strict-overflow -Wsign-compare -g -Og -Wall -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/build/test_python_89802æ/tempcwd/env/include -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include -I/Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build -c extension.c -o build/temp.macosx-14.0-arm64-cpython-313-pydebug/extension.o -DMODULE_NAME=_test_limited_c11_cext -std=c11 -DPy_LIMITED_API=0x30d00a5
      In file included from extension.c:7:
      In file included from /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/Python.h:58:
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:317:22: error: call to undeclared function '_Py_atomic_load_uint32_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          uint32_t local = _Py_atomic_load_uint32_relaxed(&ob->ob_ref_local);
                           ^
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:321:25: error: call to undeclared function '_Py_atomic_load_ssize_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          Py_ssize_t shared = _Py_atomic_load_ssize_relaxed(&ob->ob_ref_shared);
                              ^
      /Users/ec2-user/buildbot/buildarea/pull_request.itamaro-macos-arm64-aws.macos-with-brew.nogil/build/Include/object.h:432:5: error: call to undeclared function '_Py_atomic_store_ssize_relaxed'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
          _Py_atomic_store_ssize_relaxed(&ob->ob_size, size);
          ^
      3 errors generated.

[vstinner]

!buildbot ARM64 MacOS M1 NoGIL

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit 4096df8 🤖

The command will test the builders whose names match following regular expression: ARM64 MacOS M1 NoGIL

The builders matched are:

• ARM64 MacOS M1 NoGIL PR

[vstinner]

!buildbot ARM64 MacOS M1 NoGIL

[bedevere-bot]

🤖 New build scheduled with the buildbot fleet by @vstinner for commit 4096df8 🤖

The command will test the builders whose names match following regular expression: ARM64 MacOS M1 NoGIL

The builders matched are:

• ARM64 MacOS M1 NoGIL PR