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From: kaleb@mars.jpl.nasa.gov (Kaleb Keithley)
Newsgroups: comp.windows.x
Subject: Re: SUN4 frustrations! (core dump....)
Message-ID: <3612@jato.Jpl.Nasa.Gov>
Date: 8 May 90 19:19:48 GMT
References: <9005070401.AA10613@expo.lcs.mit.edu> <3322@auspex.auspex.com>
Sender: news@jato.Jpl.Nasa.Gov
Reply-To: kaleb@mars.UUCP (Kaleb Keithley)
Organization: Jet Propulsion Laboratory, Pasadena, CA.
Lines: 20

In article <3322@auspex.auspex.com> guy@auspex.auspex.com (Guy Harris) writes:
>>1) use sun standard cc compiler with -O2 to get the maximum optimization out of
>>   it. 
>
>Err, umm:
>	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.

I have compiled the entire R4 (mit tape) with -O4 on my Sun SS1; the only 
gotcha was MenuButton.c in the Athena widgets, which broke the optimizer 
and had to be "hand" compiled at -O2.  I have over a month now, and nothing 
has broken yet.

kaleb@mars.jpl.nasa.gov            Jet Propeller Labs
Kaleb Keithley

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