[Bug c++/67991] Pointer to function with internal linkage not being allowed, when it should be

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=67991

--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
Try -std=c++1y or -std=c++1z .