https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67587
--- Comment #5 from Markus Trippelsdorf <trippels at gcc dot gnu.org> --- % ../gcc/configure --disable-libstdcxx-pch --disable-libvtv --disable-libitm --disable-libcilkrts --disable-libssp --disable-libgomp --disable-werror --disable-multilib --enable-languages=c,c++ --with-build-config="bootstrap-lto" % make -j80 profiledbootstrap should be enough.
