On Mon, 23 Feb 2015, I wrote:
> My mistake. I got this warning: "ISO C90 does not support the 'z'
> gnu_printf" and I ignored the C90 because my eye was drawn to gnu_printf
> and I thought "GNU thing".
>
> 15 years is long enough. I really ought to update my brain to C99 and
> get a proper copy of it (my tatty paper copy of C90 is very worn!).
>
> I will change to %zd. Thanks for picking me up on this.
I've changed my mind, mainly because I can't find a way of getting gcc
to disable that warning while still turning on -Wformat to do format
checking.