gh-54872: Remove default OPT=-O for non-GCC compilers#142159
Conversation
The configure script was setting OPT="-O" by default for non-GCC compilers, which could conflict with user-specified CFLAGS. This change removes the automatic default, allowing users full control over optimization flags via CFLAGS without unexpected conflicts.
bobzinin requested review from AA-Turner, corona10, emmatyping and erlend-aasland as code owners
Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool. If this change has little impact on Python users, wait for a maintainer to apply the |
bobzinin changed the title 
All commit authors signed the Contributor License Agreement. |
Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool. If this change has little impact on Python users, wait for a maintainer to apply the |
StanFromIreland commented Dec 1, 2025
You need to run |
Most changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool. If this change has little impact on Python users, wait for a maintainer to apply the |
bobzininforce-pushed the fix-opt-default branch from 98956c5 to cd68588CompareMost changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool. If this change has little impact on Python users, wait for a maintainer to apply the |
bobzininforce-pushed the fix-opt-default branch from cd68588 to 6dc8463CompareMost changes to Python require a NEWS entry. Add one using the blurb_it web app or the blurb command-line tool. If this change has little impact on Python users, wait for a maintainer to apply the |
2 participants
The configure script was setting OPT="-O" by default for non-GCC compilers, which could conflict with user-specified CFLAGS. This change removes the automatic default, allowing users full control over optimization flags via CFLAGS without unexpected conflicts.