gh-106320: Remove private pylifecycle.h functions

[vstinner]

Remove private pylifecycle.h functions: move them to the internal C API ( pycore_atexit.h, pycore_pylifecycle.h and pycore_signal.h). No longer export most of these functions.

Move _testcapi.test_atexit() to _testinternalcapi.

• Issue: C API: Remove private C API functions (move them to the internal C API) #106320

[gvanrossum]

This broke macOS build for me. In Python/specialize.c there's a use of _PyOS_URandomNonblock but the file doesn't #include "pycore_pylifecycle.h". How did this pass CI? Anyway, I'll fix it.

[vstinner]

It seems like the macOS CI uses gcc. I suppose that you use clang. And clang is more strict about undefined functions. Maybe the CI should use clang?

cc @corona10

[vstinner]

It seems like the macOS CI uses gcc. I suppose that you use clang. And clang is more strict about undefined functions. Maybe the CI should use clang?

cc @corona10

[corona10]

@vstinner
Basically, the default gcc of macOS is clang.
We need to check what's happening on GA for this use.
If you meant the compiler option, it would be worth doing it.
(Change the compiler to the clang and use clang options)

cc @ned-deily

$> gcc --version
Apple clang version 14.0.0 (clang-1400.0.29.202)

[vstinner]

$> gcc --version
Apple clang version 14.0.0 (clang-1400.0.29.202)

Aha, maybe @gvanrossum LLVM is more recent. LLVM clang 15 made this change: https://releases.llvm.org/15.0.0/tools/clang/docs/ReleaseNotes.html

• The -Wimplicit-function-declaration warning diagnostic now defaults to an error in C99 and later

[dgrisby]

omniORBpy (which I maintain, https://www.omniorb.net/ ) is using _Py_IsFinalizing to avoid crashes in threads created from C++ during interpreter shutdown, as documented at https://docs.python.org/3.13/c-api/init.html#c.PyEval_RestoreThread

Is there an alternative?

[vstinner]

Would you mind to open a new separated issue to request a public function replacing the removed private function? Thanks in advance.

[dgrisby]

Would you mind to open a new separated issue to request a public function replacing the removed private function? Thanks in advance.

Here it is: #108014

Thanks.