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gh-128042: configure complains when CFLAGS=-O0 and --enable-optimizations #137975

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gh-128042: configure complains when CFLAGS=-O0 and --enable-optimizations #137975

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4a196c4
gh-128042: `configure` complains when CFLAGS=-O0 and --enable-optimiz…
taegyunkim Aug 20, 2025
f8d75ce
Warn instead of error
taegyunkim Aug 20, 2025
a3db02c
Merge branch 'main' into configure-pgo-O0
taegyunkim Aug 20, 2025
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6 changes: 6 additions & 0 deletions configure
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6 changes: 6 additions & 0 deletions configure.ac
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Original file line number Diff line number Diff line change
Expand Up @@ -1823,6 +1823,12 @@ fi],
[AC_MSG_RESULT([no])])

if test "$Py_OPT" = 'true' ; then
# Check for conflicting CFLAGS=-O0 and --enable-optimizations
case "$CFLAGS" in
*-O0*)
AC_MSG_ERROR([CFLAGS contains -O0 which conflicts with --enable-optimizations. Please remove -O0 from CFLAGS or do not use --enable-optimizations.])
;;
esac
# Intentionally not forcing Py_LTO='true' here. Too many toolchains do not
# compile working code using it and both test_distutils and test_gdb are
# broken when you do manage to get a toolchain that works with it. People
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