Failure on macOS:

gcc -c (...) -std=c99 (...) -o Objects/longobject.o Objects/longobject.c
(...)
Objects/longobject.c:5653:5: error: implicit declaration of function 'static_assert' is invalid in C99 [-Werror,-Wimplicit-function-declaration]
    static_assert(PyLong_SHIFT <= 32, "digit is larger than uint32_t");

Oh, Python is still built with -std=c99, whereas we switched to C11 in PEP 7.

I will first merge #91733 which replaces -std=c99 with -std=c11.

🤖 New build scheduled with the buildbot fleet by @vstinner for commit 2a32c43 🤖

If you want to schedule another build, you need to add the ":hammer: test-with-buildbots" label again.

I scheduled buildbot jobs to check how it goes on other platforms/C compilers.

buildbot/AMD64 Fedora Stable Refleaks PR — Build done.

This is unrelated to my PR. The leak is known in the main branch.

Python was built successfully on various versions of Windows, macOS, Ubuntu and FreeBSD on various architectures. I confirm that it confirms that C11 is now well supported. If a platform doesn't support C11, it can reimplement static_assert() with Py_BUILD_ASSERT() or get a C11 compiler :-) I merge my PR.

This is unrelated to my PR. The leak is known in the main branch.

See #91757