if command

[fowler]

The if command and the progn command seem to be having a few problems
interacting.  

This works fine:
(if (sgi) (echo "true\n") (echo "false\n"))
and prints out "true" (or "false," as the case may be).

This works:
(if (sgi) (progn (echo "true\n")) (progn (echo "false\n")))
but prints out "true\nfalse"

I also found a fun trick: making macros by putting things like 
(emodule-define encompass "echo (look-encompass World)")
and 
(emodule-define dodec 
	"echo \"(geometry dodec.off < /u/gcg/ngrap/data/geom/dodec.off)\"")
[this is handy on the NeXT which seems to not find the standard
geomview path] into your .geomview file.

-Celeste 

ps thank you stuart for fixing the emodule exit == core dump bug.