Message-Id: <m0wD4Bn-000S1qC@natacha.inti.edu.ar>
Comments: Authenticated sender is <salvador AT natacha DOT inti DOT edu DOT ar>
From: "Salvador Eduardo Tropea (SET)" <salvador AT natacha DOT inti DOT edu DOT ar>
Organization: INTI
To: David Jenkins <me AT jenkinsdavid DOT demon DOT co DOT uk>, djgpp AT delorie DOT com
Date: Fri, 4 Apr 1997 11:32:50 +0000
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Subject: Re: Simple 32-bit question.

David Jenkins <me AT jenkinsdavid DOT demon DOT co DOT uk> wrote:
> In article <3334969b DOT 455274 AT news DOT demon DOT co DOT uk>, "Alaric B. Williams"
> <alaric AT abwillms DOT demon DOT co DOT uk> writes
> >What optimisation setting are you using?
> >
> >Try putting "-O3 -fomit-frame-pointer -ffast-math -fstrength-reduce"
> >on the gcc command line like so:
> >
> >gcc my.c -o my -O3 -fomit-frame-pointer -ffast-math
> >-fstrength-reduce
> I thought that -O1 to -O3 switched on the -f optimisations in stages.
> Does this mean that to get the maximum optimisation we should turn all
> these -f switches on too???   (I know RTFM ;-)
Consult the info files, not all the -f are enabled!!, some of them doesn't help 
at all!!, others have side effects (-fomit-frame-pointer make problems to debug 
under some platforms).

SET 
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Salvador Eduardo Tropea (SET).
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