What C compilers have non-zero null pointers?

[amoore at softg.uucp]

In article <1990Jul10.141208.24902 at uunet!unhd>, pas at uunet!unhd (Paul A. Sand) writes:

> "Certain Prime computers use a value different from all-bits-0 to
> encode the null pointer. 

The Prime 50 series (segmented) architecture has a segment 0.  A null
pointer on a Prime is segment 7777 location 0 (usually written 7777/0).
The C compiler (written by Garth Conboy of Pacer Software) deals with
comparisons to 0.