Date:	Mon, 20 Jan 2003 00:12:48 -0500
Message-Id:	<200301200512.h0K5CmK27584@envy.delorie.com>
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From:	DJ Delorie <dj AT delorie DOT com>
To:	djgpp AT delorie DOT com
In-reply-to:	<b0ffom$m18$1@news.online.de> (lars.o.hansen@gmx.de)
Subject:	Re: several questions (symify, dynamic labels, cpu clock)
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> how is it possible to define paragraphs in source code in which the
> compiler should not optimize but translate "straight" from C to
> machine code, if at all?

You can't.  GCC optimizes the whole file, or none of the file.

You can use the "volatile" keyword to tell gcc that certain memory
accesses can't be optimized away.  You can also use volatile asms
similarly, or "asm volatile ("")" to put in a "block" that gcc cannot
optimize across.

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