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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"More than thousand 'Py_DEBUG': macro redefinition warnings for Windows debug builds on 3.14 branch","articleBody":"# Bug report\n\n### Bug description:\n\nSince PR https://github.com/python/cpython/pull/134211 / issue https://github.com/python/cpython/issues/133779 was packported to 3.14, Windows debug builds show more than thousand such warnings:\n```\npyconfig.h(390,16): warning C4005: 'Py_DEBUG': macro redefinition\n```\nFor example\n-  AMD64 Windows10 3.14: https://buildbot.python.org/#/builders/1711/builds/64\n- AMD64 Windows11 Refleaks 3.14: https://buildbot.python.org/#/builders/1682/builds/33\n- AMD64 Windows Server 2022 NoGIL 3.14: https://buildbot.python.org/#/builders/1717/builds/142\n- AMD64 Windows11 Bigmem 3.14: https://buildbot.python.org/#/builders/1799/builds/86\n\nThis stems from\nhttps://github.com/python/cpython/blob/b6e624a3fcd94600cbc1062cd13b0abbe56f0c25/PC/pyconfig.h#L97-L100\nwhich got added in the above PR, but rather belong to PR https://github.com/python/cpython/pull/131944 / issue https://github.com/python/cpython/issues/131942, which did not get backported, and should just be deleted.\n\n\n\n\n### CPython versions tested on:\n\n3.14\n\n### Operating systems tested on:\n\nWindows\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-134790\n* gh-134791\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/chris-eibl","@type":"Person","name":"chris-eibl"},"datePublished":"2025-05-27T06:19:02.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":2},"url":"https://github.com/134774/cpython/issues/134774"}