%p and different pointer representations

[M.T.Russell]

In article <9730 at smoke.BRL.MIL> gwyn at brl.arpa (Doug Gwyn) writes:
>A function pointer may well not fit into a void*.

This presumably implies that comparison and assignment between function
pointers and void* pointers is illegal, and thus that

	f = NULL;

and

	if (f == NULL)

are both illegal if f is a function pointer and NULL is defined as (void *)0.
If this is so, then I don't see that (void *)0 is a reasonable definition
of NULL.

Is (void *)0 a special case?  Gcc 1.32 -ansi -pedantic doesn't think so -
it objects to the above constructs.

Mark Russell
mtr at ukc.ac.uk