[Bug c/83559] [8 regression] -Wsuggest-attribute=const conflicts with -Wattributes warning about const attribute on function returning void

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83559

--- Comment #5 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Martin Sebor from comment #4)
> Fixed in r256188.

Thanks for the quick fix! One thing I'm still wondering, though, what's the
recommended way for maintaining compatibility with old compilers that still
have the old -Wsuggest-attribute=const? A bunch of ifdefs?