[3.14] gh-148535: Don't use gcc -fprofile-update=atomic flag on i686 (GH-148554)#148655
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vstinner merged 1 commit intopython:3.14from Apr 16, 2026
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…ythonGH-148554) The -fprofile-update=atomic flag was added to fix a random GCC internal error on PGO build (pythongh-145801) caused by corruption of profile data (.gcda files). The problem is that it makes the PGO build way slower (up to 47x slower) on i686. Since the GCC internal error was not seen on i686 so far, don't use -fprofile-update=atomic on i686. (cherry picked from commit 2faceeec5c0fb06498a9654d429180ac4610c65a) Co-authored-by: Victor Stinner <vstinner@python.org>
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The -fprofile-update=atomic flag was added to fix a random GCC
internal error on PGO build (gh-145801) caused by corruption of
profile data (.gcda files). The problem is that it makes the PGO
build way slower (up to 47x slower) on i686. Since the GCC internal
error was not seen on i686 so far, don't use -fprofile-update=atomic
on i686.
(cherry picked from commit 2faceee)
Co-authored-by: Victor Stinner vstinner@python.org