i was building and running the regression tests in the src tree (just to see
what would happen) and i found that libc does not contain sigsetjmp (and
siglongjmp) while building the sigsetjmp test.  i modified the gen/Makefile
to cause the generic c versions of these routines to be built.  the sig
regression tests then linked and seemed to work fine.  however, today i
see the following in the changelog:

cgd
Sat Feb  4 22:09:30 PST 1995
Update of /b/source/CVS/src/lib/libc/gen
In directory ...

Removed Files:
	sigsetjmp.c
Log Message:
kill this.  really.

should the m68k ports have sigsetjmp?  i noticed the other architectures all
have a machine specific version.