#define _GNU_SOURCE
#include <stdio.h>
#include <stdlib.h>
So it would appear to be in stdio.h on GNU/Linux...
*if* _GNU_SOURCE is defined. As far as I can see, t1utils doesn't
define that.
I think it's a bug in Cygwin stdio.h, but since it's so easy to rename
the function to avoid it, I thought I would ask Eddie if he was
willing. That's all.
karl