"Eduardo E. Horvath" wrote:

> On Tue, 27 Apr 1999, Simon Burge wrote:
> 
> > "Eduardo E. Horvath" wrote:
> > 
> > > sparc64 currently runs in either 32-bit or 64-bit mode, so the mbuf size
> > > should vary depending on the kernel.  What we really need is some cpp
> > > define that reports pointer size so we can check that rather than:
> > > 
> > > #if defined(alpha) || (defined(sparc64) && defined(__arch64__)) || \
> > > 	(defined(mips) && ...) || (defined(powerpc) ....
> > 
> > It doesn't have to be that bad:
> > 
> > #define MSIZE	(128 * (sizeof(void *) / 4))
> 
> It'll work in this case, but not in a number of other cases since sizeof()
> is a part of the compiler, not the preprocessor.

That was what I was trying to say - get the compiler to do the work.
It's too early in the morning - what is a case where you need the
preprocessor to do the job?

Simon.