VAX/Apple(6502) C xcompiler, small C as in Dr. Dobbs

[David Terlinden]

I'm trying to develop a C compiler to run on a VAX to generate code for
Apple.  Does anyone have any comments on
1) using so-called portable C compiler for this purpose
2) modifying small C to emit code for 6502 and beefing up small C to be bigger
3) any other method of getting one, including buying it
4) anything else germane to such an endeavor
?
Thanks:
Boris First, ttidca!davidt TTI Santa Monica CA 90405
Path:  ...!{randvax|trwrb|philabs|vortex}!ttidca!davidt