[Bug c++/78749] [7 Regression] bogus warning for friend member function in anonymous namespace

[trippels at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78749

--- Comment #2 from Markus Trippelsdorf <trippels at gcc dot gnu.org> ---
This warning happens a lot when compiling LLVM (for friend operators).