Re: [PATCH] AC_LANG_INT_SAVE: Modernize function declarators (C89 and above).

On Wed, 5 Aug 2020, Zack Weinberg wrote:

> +1 from me regardless -- we should be phasing out the use of pre-ANSI
> constructs in autoconf's generated C snippets, and this is as good a
> place to start as any.

Note that C2x no longer had old-style function definitions and treats () 
in a function definition the same as (void) (in a declaration that's not a 
definition it still gives a non-prototype type).  So with -std=c2x or 
-std=gnu2x, GCC -Wold-style-definition won't warn about ().

-- 
Joseph S. Myers
[email protected]