[PATCH 27/27] Fix PTRDIFF_MIN/PTRDIFF_MIN and PTRDIFF_MIN for ILP32.

[Joseph Myers]

On Tue, 21 Jun 2016, Yury Norov wrote:

> +#  ifdef __WORDSIZE32_PTRDIFF_LONG
> +#    define PTRDIFF_MIN		(-2147483647L-1)
> +#    define PTRDIFF_MAX		(2147483647L)
> +#  else
> +#    define PTRDIFF_MIN		(-2147483647-1)
> +#    define PTRDIFF_MAX		(2147483647)

We now use typo-proof conventions, preferring #if to #ifdef.  That is, 
make other bits/wordsize.h files define the macro to 0, so you can use #if 
here.

-- 
Joseph S. Myers
joseph@codesourcery.com