[Bug c++/81608] incompatible declarations of the same extern function at different scopes accepted

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81608

--- Comment #1 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
I think there might be a duplicate of this bug already. It was noticed when
Zack (or was it joseph) implemented the correct behavior for the c front-end.
This was during the 3.4 time frame.