https://gcc.gnu.org/bugzilla/show_bug.cgi?id=89349
--- Comment #6 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > My reproducer described in the first comment was: > 1) build gcc trunk w/o bootstrap and install it > 2) use the compiler and build gcc-8 branch w/o bootstrap > 3) Ada FE is successfully built, but Ada runtime build fails (with gcc-8 Ada > FE) Sure, but the question is what happens if remove --disable-bootstrap from the configure line you posted?