[Bug c++/87407] Enhance -Wunused-function to handle also inline functions

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=87407

--- Comment #8 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Why do you want to have static inline functions in headers in C++?

Why do you want to have static inline functions NOT in headers in C++?