ludo@gnu.org (Ludovic Courtès) writes:

> Greg Troxel <gdt@ir.bbn.com> writes:
>
>> #define NULL (void *)0
>
> This is under-parenthesized!
>
> Two actions to be taken:
>
>   1. Report a bug to your favorite libc maintainers.  ;-)

I think that's a legal value for NULL per C99.  Interestingly it has not
apparently caused other trouble.  We'll see what others say, and I can
see the point that having it parenthesized is defensive even if it's
legal as is.

>   2. Ask libunistring folks at
>      http://savannah.gnu.org/projects/libunistring/ to replace
>      "sizeof NULL" by "sizeof (NULL)" in `test-locale.c'.

I did, and this has been committed to their repo for gnulib.