[Bug c/121275] Extend _Countof() to work with array parameters

[foss+gcc--- via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=121275

--- Comment #1 from Alejandro Colomar <foss+...@alejandro-colomar.es> ---
The patch implementing this is posted in the mailing list:
<https://inbox.sourceware.org/gcc-patches/4vwcakjitm5zpj4q652pg3swjqvirfmpfxgndyaogbeeu5iyqe@ozu3a3z4htg5/T/#t>