https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93214
--- Comment #2 from Eric Botcazou <ebotcazou at gcc dot gnu.org> --- > Since r279563, Ada LTO bootstrap fails because of undefined reference > to __gnat_debug_raise_assert_failure, undefined reference to > __gnat_debug_raise_exception and undefined reference to > __gnat_unhandled_exception. The 3 symbols are declared in libgnat/s-excdeb.ads through pragma Export. This means that the DECL_ASSEMBLER_NAME is distinct from the DECL_NAME for them. > In the run up to the failure, there is also a number of > -Wlto-type-mismatch warnings about various types not matching their > "original declarations." Yes, but they are benign and should be unrelated to the issue.
