Message-ID: <37B31E2E.24D7D864@home.com>
From: Trevor <kearns AT home DOT com>
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Newsgroups: comp.os.msdos.djgpp
Subject: Re: Optimization for pentium (pgcc warning)
References: <3796313E DOT 7548AFDD AT friko6 DOT onet DOT pl>
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Date: Thu, 12 Aug 1999 17:16:52 GMT
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To: djgpp AT delorie DOT com
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Reply-To: djgpp AT delorie DOT com

I have had major problems compiling windows code using mssdk headers
using pgcc (1.0.1 I think). The problem was that it was pushing two
arguments to TranslateMessage() and DispatchMessage(), and they only
take one argument. This lead to a leak of 8 bytes of stack space per
message, which causes a mysterious crash a few minutes after starting
the program (due to stack overflow).

Also, -O6 does enable unstable optimizations. Just read the pgcc faq and
see the options labelled as unstable and compare it to the options
enabled with -O6

The best commandline for stability is -O6 -fno-loop-after-global
-fno-combine-222 -fno-opt-reg-stack -fno-peep-spills

although I still had the problem explained above with these options.

toudi wrote:
> 
> I have gcc 2.8.1 and it has an option -mpentium, but it does
> nothing.
> I heard somethin about PGCC. Is it gcc with optimization for
> pentium?
> Where I can download it from?
> 
> --
>        mailto:pienkny AT friko6 DOT onet DOT pl
>   +4822368951