[Bug c/109214] extension to C language allowing void * to be cast to function pointer should be documented

[pinskia at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109214

--- Comment #5 from Andrew Pinski <pinskia at gcc dot gnu.org> ---
And the related https://www.open-std.org/JTC1/SC22/WG14/www/docs/n2230.htm .