[Bug c++/82466] Missing warning for re-declaration of built-in function as variable

[bernd.edlinger at hotmail dot de]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82466

--- Comment #2 from Bernd Edlinger <bernd.edlinger at hotmail dot de> ---
Thanks for looking at this.
I think your patch is fine.

My thought was that it could also be enabled by
OPT_Wbuiltin_declaration_mismatch,
which is default-enabled but can be disabled
in the test case, if needed.