[Bug c/47781] warnings from custom printf format specifiers

[egallager at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=47781

--- Comment #21 from Eric Gallager <egallager at gcc dot gnu.org> ---
(In reply to Cj Welborn from comment #20)
> Has anything changed since 2017 that would let me use
> register_printf_specifier and -Wformat warnings at the same time? 

Not that I know of; people still can't agree on a proper design AFAIK...
contributions welcome:
https://gcc.gnu.org/wiki/GettingStarted#Basics:_Contributing_to_GCC_in_10_easy_steps