Re: [ft-devel] freetype-2.3.7 -- ftconfig.h for biarch systems

[Peter Breitenlohner]

On Tue, 8 Jul 2008, Antoine Leca wrote:

> > So, I think, using traditional ANSI C header "limits.h"
> > is more generic than using modern headers "bits/wordsize.h", like...

This is a very good point. I just looked at our i686/x86_64 glibc 
/usr/include/limits.h header and found these lines:

        #include <bits/wordsize.h>

        #  if __WORDSIZE == 64
        #   define LONG_MAX     9223372036854775807L
        #  else
        #   define LONG_MAX     2147483647L
        #  endif
        #  define LONG_MIN      (-LONG_MAX - 1L)

        #  if __WORDSIZE == 64
        #   define ULONG_MAX    18446744073709551615UL
        #  else
        #   define ULONG_MAX    4294967295UL
        #  endif

Thus, assuming that other biarch versions of <limits.h> do something
analogous (as they certainly do for glibc), testing LONG_MAX should do the
job and there is no need to use <bits/wordsize.h> (that may or may not
exist).

And there should be no problems with
        #if LONG_MAX == 9223372036854775807L
in 32 bit mode, because 9223372036854775807L=0x7fffffffffffffff is truncated
to 0xffffffff whereas LONG_MAX=0x7fffffff.

Best regards
Peter Breitenlohner <address@hidden>