https://gcc.gnu.org/bugzilla/show_bug.cgi?id=79076
--- Comment #3 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > I forgot to mention that this was happening with 5.4.0 and 6.3.0 as well. Then try with a standard configuration, in particular remove the in-tree binutils if you don't use them! You can drop cloog and isl too.
