how to tell 64 vs 32 bit architecture ?

[Luigi Rizzo]

On Fri, Sep 07, 2007 at 09:54:35AM -0400, Yan wrote:
> How about this:
> 
> #define MY_MAGIC ((sizeof(intptr_t)==4) ? 0Xdeadbeef : 0xdeadbeefd00de123)

gcc 3.4 on a 32bit machine complains because the second constant
is too large.

cheers
luigi