[Bug c/117664] [15 regression] incompatible pointer type [-Wincompatible-pointer-types]

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117664

--- Comment #1 from Sam James <sjames at gcc dot gnu.org> ---
GCC trunk now defaults to -std=gnu23. C23 removes unprototyped functions, so
`void foo()` now means `void foo(void)`.