Message-Id: <199801272138.KAA03406@cirrostratus.netaccess.co.nz>
Comments: Authenticated sender is <chapmic5 AT pop3 DOT netaccess DOT co DOT nz>
From: "Richard Chappell" <chapmic5 AT cirrostratus DOT netaccess DOT co DOT nz>
To: Vik Heyndrickx <Vik DOT Heyndrickx AT rug DOT ac DOT be>
Date: Wed, 28 Jan 1998 09:30:56 +0000
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Subject: Re: djgpp/rhide acting strange
Reply-to: Pixnaps AT netaccess DOT co DOT nz
CC: djgpp AT delorie DOT com
In-reply-to: <34CD9535.5AB@rug.ac.be>
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> From:          Vik Heyndrickx <Vik DOT Heyndrickx AT rug DOT ac DOT be>
> Subject:       Re: djgpp/rhide acting strange
> Date:          Tue, 27 Jan 1998 09:05:09 +0100
> Organization:  University of Ghent, Belgium
> To:            djgpp AT delorie DOT com

> Oscar Iommi Campbell wrote:
> > 
> > I've been away from djgpp programming a few months, using VC++ 5.
> > However today a I sat down to finish of an old GUI I was making in
> > djgpp. The problem is when I debug some variables are said to be 'not
> > available' though they exist right in front of my eyes. Sometimes they
> > evaluate but to another value then the real one ('monitored' with
> > fprint). Another bug also raises when I compile with -m486, in a place
> > which isn't exactly a critical dangerous code place..
> > 
> > Has my djgpp/rhide freaked out somehow??
>  
> No :-)
> Compile your code without optimizations.
> In the past it was said that compilers could not optimize the code and
> produce debugging information. Stallman and Kenner were able to
> integrate both at the same time in the gnu compiler which djgpp uses.
> But some sacrifices had to be made. This means that local variables can
> get "optimized out" and that they can acquire other values other than
> the value that was last explicitely assigned to them.
> 
> > BTW, I've always runned rhide in a dosbox, it compiles 10-20 times
> > slower in real dos!??.
> 
> use SMARTDRV.EXE

What does optimization do?? Does it make your exe file smaller, or 
faster, or what??