https://gcc.gnu.org/bugzilla/show_bug.cgi?id=69725
Martin Sebor <msebor at gcc dot gnu.org> changed: What |Removed |Added ---------------------------------------------------------------------------- Summary|profiledbootstrap failure |profiledbootstrap failure |due to unsats for isl |with -flto due to unsats |functions |for isl functions --- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> --- This works with ISL in my source tree (the --disable-werror option suppresses build failures due to -Wuninitialized): $ /src/gcc/trunk/configure --enable-languages=c,c++,fortran,go,lto,obj-c++ --enable-checking=release --disable-werror ... $ make -j10 profiledbootstrap What seems to break it is the -flto option in BOOT_CFLAGS. That's also supported by Jakub having used profiledbootstrap regularly over the last months but without LTO.