Re: How to find out if an architecture is 32 or 64 bit?

[Falk Hueffner <falk@rut.informatik.uni-tuebingen.de>]

Adrian Bunk <bunk@fs.tum.de> writes:

> I'm lookking for my package tmview for a C solution to determine whether
> an architecture is 32 or 64 bit.

The correct answer is: your code shouldn't care. Very few programs
really need to make a distinction here.

> The current code is:
> 
> <--  snip  -->
> 
> #define BMLONG32       /* for architectures where "long int" has 32bits,
>                           e.g. i386  */
> /* #define BMLONG64  *//* for architectures where "long int" has 64bits,
>                           e.g. alpha */
> 
> Could anyone point me to a better way to handle this?

You could check if LONG_MAX from limits.h is 9223372036854775807L or
2147483647L, and barf it is isn't any.

        Falk