how to tell 64 vs 32 bit architecture ?

[Yan]

Perhaps "if(sizeof(void*)==4) { /* 32 */} else if(sizeof(void*) ==8) { /* 64
*/ }" ?

Or do you need something for the preprocessor?

-yan

On 9/6/07, Luigi Rizzo <rizzo at icir.org> wrote:
>
> hi,
> i was wondering what is the proper way to tell a 64 vs 32 bit
> architecture.
>
> I see that some code in sys/ uses  ' #ifdef __LP64__ ' but i am not
> sure if this is generic enough (ie not gcc or FreeBSD specific),
> and also suitable for userland (i.e. works on linux or other platforms
> as well).
>
>         cheers
>         luigi
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