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{"@context":"https://schema.org","@type":"DiscussionForumPosting","headline":"Soft-deprecate outdated C API macros","articleBody":"As [discussed on C API WG](https://github.com/capi-workgroup/decisions/issues/99), formally soft-deprecate outdated macros:\n- `Py_LL` \u0026 `Py_ULL`: Use `LL`/`ULL` suffixes.\n- `Py_MEMCPY` (already soft-deprecated)\n- `Py_VA_COPY`: Use `va_copy` directly.\n- `PY_LONG_LONG`, `PY_LLONG_MIN`, `PY_LLONG_MAX`, `PY_ULLONG_MAX`, `PY_INT32_T`, `PY_UINT32_T`, `PY_INT64_T`, `PY_UINT64_T`, `PY_SIZE_MAX`: Use C99 types/limits\n- `Py_UNICODE_SIZE`: Use `sizeof(wchar_t)` directly\n- `PY_FORMAT_SIZE_T`: Use `\"z\"` directly\n- `Py_ALIGNED`: Use `_Alignas` (C11) or `alignas` (C++ \u0026 C23) instead.\n\nPlus `Py_UNICODE_WIDE`: soft-deprecate this instead of removing. (There's been no visible warning outside docs, and removing an `#ifdef` macro is indistinguishable from making it “false”.)\n\n\n\u003c!-- gh-linked-prs --\u003e\n### Linked PRs\n* gh-146178\n\u003c!-- /gh-linked-prs --\u003e\n","author":{"url":"https://github.com/encukou","@type":"Person","name":"encukou"},"datePublished":"2026-03-19T15:38:04.000Z","interactionStatistic":{"@type":"InteractionCounter","interactionType":"https://schema.org/CommentAction","userInteractionCount":0},"url":"https://github.com/146175/cpython/issues/146175"}