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gcc: pass -Wno-complain-wrong-lang when using -fmacro-prefix-map #432060

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Merged
vcunat merged 1 commit into from
Aug 10, 2025
Merged

gcc: pass -Wno-complain-wrong-lang when using -fmacro-prefix-map #432060

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14 changes: 14 additions & 0 deletions pkgs/development/compilers/gcc/common/builder.nix
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Original file line number Diff line number Diff line change
Expand Up @@ -126,6 +126,20 @@ originalAttrs:
EXTRA_LDFLAGS_FOR_TARGET="$EXTRA_LDFLAGS"
fi

# We include `-fmacro-prefix-map` in `cc-wrapper` for non‐GCC
# platforms only, but they get picked up and passed down to
# e.g. GFortran calls that complain about the option not
# applying to the language. Hack around it by asking GCC not
# to complain.
#
# TODO: Someone please fix this to do things that make sense.
if [[ $EXTRA_FLAGS_FOR_BUILD == *-fmacro-prefix-map* ]]; then
EXTRA_FLAGS_FOR_BUILD+=" -Wno-complain-wrong-lang"
fi
if [[ $EXTRA_FLAGS_FOR_TARGET == *-fmacro-prefix-map* ]]; then
EXTRA_FLAGS_FOR_TARGET+=" -Wno-complain-wrong-lang"
fi

# CFLAGS_FOR_TARGET are needed for the libstdc++ configure script to find
# the startfiles.
# FLAGS_FOR_TARGET are needed for the target libraries to receive the -Bxxx
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