[Bug c++/78470] static class member cannot be reference by algorithm functions with -O0 option

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78470

--- Comment #2 from Jonathan Wakely <redi at gcc dot gnu.org> ---
This is a FAQ:
https://gcc.gnu.org/wiki/VerboseDiagnostics#missing_static_const_definition