[Bug bootstrap/91972] Bootstrap should use -Wmissing-declarations

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91972

--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Alexander Monakov from comment #4)
> > Why is it missing the static keyword then? (Or alternatively, why isn't it in an anonymous namespace?)
> 
> Huh? Without the warning developers may simply forget to put the 'static'
> keyword. With the warning they would be reminded when bootstrapping the
> patch.
> 
> 
> > Ah, I like the namespace thing for target hooks (possibly langhooks as well).
> 
> Sure, it's nice to have sensible namespace rules for future additions, but
> hopefully that's not a reason/excuse to never re-enable the warning.

Agreed; I think I tried enabling the warning once while bootstrapping myself,
but I forget what the results were...