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GeezerVison is showing github.com — PEP 831: Clarify build backend flag propagation · Issue #5073 · python/peps

PEP 831: Clarify build backend flag propagation #5073

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PEP 831: Clarify build backend flag propagation#5073
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@pablogsal
pablogsal
opened on Aug 4, 2026
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PEP 831 currently overstates how CPython build flags propagate through generic build backends. Update the PEP to distinguish Setuptools and deliberate sysconfig consumers from other PEP 517 backends, and document build-details.json as the appropriate future standardized interface.

Context: https://discuss.python.org/t/pep-831-frame-pointers-everywhere-enabling-system-level-observability-for-python/106958/7

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