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Re: Determining whether long long is defined on a platform
For an alternative, look at the way it's done in configure scripts, e.g.
in gcc source distribution.
Tim Prince
----- Original Message -----
From: "Ross Smith" <ross.s@ihug.co.nz>
To: <gcc@gcc.gnu.org>
Sent: Thursday, August 17, 2000 2:35 PM
Subject: Re: Determining whether long long is defined on a platform
> Matt Minnis wrote:
> >
> > Is there a automated way to determine if long long is defined or
even valid
> > on a given platform?
>
> I do it this way:
>
> #include <limits.h>
> #if defined(LLONG_MAX) || defined(LONG_LONG_MAX)
> // assume we have long long
> #else
> // assume we don't have long long
> #endif
>
> Probably not 100% reliable, but it's worked OK for me.
>
> LLONG_MAX is the correct spelling according to C99, but GCC still uses
> LONG_LONG_MAX (or did when I wrote the code; I haven't checked
lately).
>
> --
> Ross Smith <ross.s@ihug.co.nz> The Internet Group, Auckland, New
Zealand
>
========================================================================
> "C++ is to programming as sex is to reproduction. Better ways might
> technically exist but they're not nearly as much fun." -- Nikolai
Irgens