René's URL Explorer Experiment

{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Provide access to the __STDC_IEC_559__ macro","articleBody":"# Feature or enhancement\n\n### Proposal:\n\nThis e.g. can allow us filter out some tests on systems, which don't conform to the C Annex F.  Example: https://github.com/python/cpython/issues/138573.\n\nI'm not sure where to put this stuff.  In order of my preference:\n1. New boolean variable in the sys module?\n2. sys.float_info field?  Though, sphinx docs says \"The values correspond to the various floating-point constants defined in the standard header file float.h for the ‘C’ programming language\".\n3. in the math module?\n\nEdit:\n* sysconfig variable as another place\n\n### Has this already been discussed elsewhere?\n\nThis is a minor feature, which does not need previous discussion elsewhere\n\n### Links to previous discussion of this feature:\n\n_No response_\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-138811\n* gh-146501\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/skirpichev","@type":"Person","name":"skirpichev"},"datePublished":"2025-09-06T13:22:18.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":26},"url":"https://github.com/138580/cpython/issues/138580"}