Path: utzoo!mnetor!tmsoft!torsqnt!news-server.csri.toronto.edu!cs.utexas.edu!uunet!auspex!guy
From: guy@auspex.auspex.com (Guy Harris)
Newsgroups: comp.windows.x
Subject: Re: SUN4 frustrations! (core dump....)
Message-ID: <3322@auspex.auspex.com>
Date: 8 May 90 18:11:55 GMT
References: <X-WINDOW.90May3210706@baldur.uni-paderborn.de> <9005070401.AA10613@expo.lcs.mit.edu>
Organization: Auspex Systems, Santa Clara
Lines: 18

>1) use sun standard cc compiler with -O2 to get the maximum optimization out of
>   it. 

Err, umm:

	1) "-O" is equivalent to "-O2" in SunOS 4.x on a SPARC-based
	   machine;

	2) "the maximum optimization" is "-O4", although, to quote the
	   manual page, "neither -O3 nor -O4 should be used when
	   compiling either device drivers, or programs that modify
	   external variables from within signal handlers;" I don't know
	   if that'll break any X11 code or not.

BTW, if you have a 68K-based Sun and are running 4.0[.x], it might be
interesting to see what performance difference results from compiling
with "-O2" ("-O" is equivalent to "-O2" in 4.1 on 68K-based machines);
it worked when I tried it, but I didn't do any performance comparison.