[Bug fortran/44054] Handle -Werror, -Werror=, -fdiagnostics-show-option, !GCC$ diagnostic (pragmas) and color

[burnus at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=44054

--- Comment #23 from Tobias Burnus <burnus at gcc dot gnu.org> ---
(In reply to Manuel López-Ibáñez from comment #22)
> 2) Support !GCC$ diagnostic (pragmas)

That's now PR64273.