how to tell 64 vs 32 bit architecture ?

[Luigi Rizzo]

On Tue, Sep 11, 2007 at 10:48:57PM +1000, Andrew Milton wrote:
> On Tue, Sep 11, 2007 at 05:16:53AM -0700, Luigi Rizzo wrote:
> > 
> > gcc 3.4 on a 32bit machine complains because the second constant
> > is too large.
> 
> Can I ask why the 64 bit constant isn't 0xd00de123deadbeef , which would make
> bits 0-31 the same for both architectures, which might simplify the problem.

because i want to run with very strict compiler checks and implicit
truncation is always flagged as a Bad Thing(TM).

cheers
luigi