Xref: news2.mv.net comp.os.msdos.djgpp:4351
From: Alexander Larsson <alla AT lysator DOT liu DOT se>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Pentium Optimized GCC
Date: Wed, 29 May 1996 17:47:05 -0700
Organization: AlgoNet Public Access Node, Stockholm
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Message-ID: <31ACF009.380@lysator.liu.se>
References: <31A371F9 DOT 446B9B3D AT eng DOT umd DOT edu>
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To: djgpp AT delorie DOT com
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John Sabean wrote:
> 
> I saw the Pentium Compiler Group page at:
> 
> http://www.goof.com/pcg/
> 
> These patches are for Linux, but I was wondering
> if anyone had successfully applied them to DJGPP?
> 
> If so, is there a place where I could get the
> executable, or at least some tips on how to patch
> it myself? (if it can be done....)

I have patched/compiled it for djgpp.
The patching is easy, just download gcc272s.zip
from some djgpp site. Download the patches.
Then run:
  patch <patch.diff (or whatever it's called)

I don't know why, but the patching failed miserably 
on my dos machine, so i had to do the patching on 
a unix machine, but it worked great.
(Makefile and Makefile.in failed, but i patched them 
 manually, its just some CFLAG= -O2 to add)


 Then i just did 
   configure go-32
   make

 which produced cc1 and xggc which i copied to my bin dir.


There is only one problem, i don't know if i do 
something wrong, because when i compiled a program
with -mpentium -O6 (or -O3) it actually got SLOWER!
Not much, but still. The docs mention 5% always and
up to 30% in extreme cases. Dunno why, first time i
build gcc, i might have done something wrong.

Has anyone else tried this?

/Alex