[Bug c++/64875] -Winline does not report C++ methods

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64875

--- Comment #1 from Jonathan Wakely <redi at gcc dot gnu.org> ---
I don't think this warning is very relevant to C++.

In C++ 'inline' is more useful for telling the compiler that the function may
be defined in mutiple translation units, and that is typically more important
than whether it is actually inlined or not.