[Bug c++/91187] Is it possible to make -Wzero-as-null-pointer-constant learn about extern "C"?

[aacid at kde dot org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=91187

--- Comment #1 from Albert Astals Cid <aacid at kde dot org> ---
This is with gcc version 9.1.0