alloca() portability

[Russ Rew]

Comments in Doug Gwyn's "(mostly) portable public-domain implementation" of
alloca say

	It should work under any C implementation that uses an
	actual procedure stack (as opposed to a linked list of
	frames).

What common platforms do not provide an alloca or cannot use Doug Gwyn's
alloca because they don't use a procedure stack?  In other words, if we
decide to use alloca despite the warnings about its portability, what
platforms are we precluding?

Reply by mail, and I'll summarize.

Russ Rew
Unidata Program Center
russ at unidata.ucar.edu

 Russ Rew                                         Unidata Program Center
 russ at unidata.ucar.edu                            UCAR, P.O. Box 3000
 (303) 497-8845                                   Boulder, CO  80307-3000