https://gcc.gnu.org/bugzilla/show_bug.cgi?id=90690
--- Comment #3 from Eric Gallager <egallager at gcc dot gnu.org> --- (In reply to sandra from comment #2) > I think this has been fixed? In a recent-ish trunk build, I see gcc -Q > --help-warning prints > > -Werror-implicit-function-declaration > -Werror=implicit-function-declaration > > whereas in GCC 9 it just printed > > -Werror-implicit-function-declaration Tim, can you confirm?