https://gcc.gnu.org/bugzilla/show_bug.cgi?id=80922
--- Comment #9 from Andrew Pinski <pinskia at gcc dot gnu.org> --- (In reply to pefoley2 from comment #8) > Note that this appears to be affecting the gcc source tree. > > Attempting a build with --with-build-config=bootstrap-lto --enable-werror > errors out with: Yes but lto bootstrap disables werror on purpose so you adding --enable-werror is not supported.