Date:	Fri, 23 Aug 1996 13:23:10 +0800 (GMT)
From:	Orlando Andico <orly AT gibson DOT eee DOT upd DOT edu DOT ph>
To:	Peter Johnson <locke AT mcs DOT net>
cc:	djgpp AT delorie DOT com
Subject:	Re: Pentium GCC
In-Reply-To:	<321a8a95.3515402@news.mcs.net>
Message-ID:	<Pine.SGI.3.93.960823131300.8307A-100000@gibson.eee.upd.edu.ph>
MIME-Version:	1.0

On Wed, 21 Aug 1996, Peter Johnson wrote:

> I've heard a few rumors about there being a pentium-optimizing version
> of GNU C/C++.
> 1.	If it exists, where can I get it?  Is it ported to DJGPP yet?
> 2.	If it doesn't exist, where can I pester ;) people about making
> it? (j/k)
> 
> Thanks!

Marc Lehmann and Chai Harjo are working on a set of patches for gcc-2.7.2
which optimizes for Pentiums. Their site is at http://www.goof.com/pcg.
The latest reliable patch that I know of is the pl9. I have tested this
(under Linux) and a 30% speed improvement can be obtained over the stock
i486-linux gcc for things like gzip and dhrystone-2.

There also is the latest alpha patch (which I am helping to test). Marc
claims that it can compile the Linux kernel at -O6 (the pl9 version can
only manage -O3) stably. However, I have not yet succeeding in building
this version because it requires some include files from the POSIX threads
package which I do not possess.

I can help with some tips on the compilation and stuff, although I never
have done it for anything but Linux. Beware that the so-called "patches"
I'm talking about are about 3-5Meg in size, gzipped. You also need the
base gcc-2.7.2 source tree to start with.

Cheers.


----
Orlando Andico                           http://gibson.eee.upd.edu.ph/~orly/
orly AT gibson DOT eee DOT upd DOT edu DOT ph                "Who knows what's going to happen,
IRC Lab/EE Dept/UP Diliman     lottery or car crash, or you'll join a cult."

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