[Bug c/78359] Redeclaration of global variables is not reported

[pinskia at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=78359

--- Comment #4 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
(In reply to hugo74 from comment #2)
> (In reply to Andrew Pinski from comment #1)
> > Because 
> > int Counter
> > 
> > in the global scope is consider a tentative definition.
> 
> What is meant by "tentative declaration" ? It is very misleading.

C is a weird langauge.

> It should not work that way. I checked it in other C compilers and each of
> them reports an redefinition error in such case.

Are you sure they were C compilers and not C++ compilers?

C and C++ differ here.