[Bug c/96284] Outdated C features should be made errors with newer standards

[msebor at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=96284

--- Comment #4 from Martin Sebor <msebor at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #3)
> I support including more diagnostics in -Wall and -Werror

I meant "-Wall and -Wextra."