[Bug target/83397] void f() { } has zero arguments for pre C23

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=83397

--- Comment #7 from Sam James <sjames at gcc dot gnu.org> ---
It would be useful to fix the pessimisation for the benefit of projects built
with older autoconf (no autoconf release yet made defaults to C23, for example)
or build systems with a hardcoded -std=gnu99 or similar.