More than thousand 'Py_DEBUG': macro redefinition warnings for Windows debug builds on 3.14 branch

[chris-eibl]

Bug report

Bug description:

Since PR #134211 / issue #133779 was packported to 3.14, Windows debug builds show more than thousand such warnings:

pyconfig.h(390,16): warning C4005: 'Py_DEBUG': macro redefinition

For example

• AMD64 Windows10 3.14: https://buildbot.python.org/#/builders/1711/builds/64
• AMD64 Windows11 Refleaks 3.14: https://buildbot.python.org/#/builders/1682/builds/33
• AMD64 Windows Server 2022 NoGIL 3.14: https://buildbot.python.org/#/builders/1717/builds/142
• AMD64 Windows11 Bigmem 3.14: https://buildbot.python.org/#/builders/1799/builds/86

This stems from

cpython/PC/pyconfig.h

Lines 97 to 100 in b6e624a

	/* _DEBUG implies Py_DEBUG */
	#ifdef _DEBUG
	# define Py_DEBUG 1
	#endif

which got added in the above PR, but rather belong to PR #131944 / issue #131942, which did not get backported, and should just be deleted.

CPython versions tested on:

3.14

Operating systems tested on:

Windows

Linked PRs

• [3.14] GH-134774: fix 'Py_DEBUG': macro redefinition warnings for Windows debug builds #134790
• [3.14] GH-134774: fix 'Py_DEBUG': macro redefinition warnings for Windows debug builds #134791

[chris-eibl]

@zooba: I can do a PR, but since this is 3.14 related, I assume this is one of the rare cases where the PR should not be created against main?

[zooba]

Yeah, probably just a bad backport. Make a PR directly against the 3.14 branch, and include [3.14] at the start of the title to satisfy the backport checker.