[3.13] gh-148535: Don't use gcc -fprofile-update=atomic flag on i686 (#148554)#148656
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vstinner merged 1 commit intopython:3.13from Apr 16, 2026
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[3.13] gh-148535: Don't use gcc -fprofile-update=atomic flag on i686 (#148554)#148656vstinner merged 1 commit intopython:3.13from
vstinner merged 1 commit intopython:3.13from
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…ython#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 2faceee)
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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)