https://gcc.gnu.org/bugzilla/show_bug.cgi?id=119689
--- Comment #3 from Richard Biener <rguenth at gcc dot gnu.org> --- Created attachment 61047 --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=61047&action=edit preprocessed source Adding -fcompare-debug to the ipa-fnsummary.o compile in stage2 or stage3 fails with xg++: error: /space/rguenther/src/gcc-clean/gcc/ipa-fnsummary.cc: ‘-fcompare-debug’ failure (length) dropping -D_FORTIFY_SOURCE=3 still reproduces that. Reproduces with a x86_64 compiler and the attached preprocessed source using -m32 -O2 -fPIC -g -fno-exceptions -fno-rtti -fcompare-debug -march=i586 -mtune=generic -fno-checking