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Message-Id: <199912230415.WAA16673@hp2.xraylith.wisc.edu>
To: "s.rekow" <s DOT rekow AT sh-home DOT de>
cc: cygwin AT sourceware DOT cygnus DOT com
Subject: Re: c compiler mmx support 
In-reply-to: Your message of "Thu, 23 Dec 1999 03:12:36 +0100."
             <000901bf4ceb$377986c0$1e003cd4 AT theunknown> 
Date: Wed, 22 Dec 1999 22:15:00 -0600
From: Mumit Khan <khan AT NanoTech DOT Wisc DOT EDU>

"s.rekow" <s DOT rekow AT sh-home DOT de> writes:
> 
> or you can rebuild gcc with the pgcc-patch (supports mmx); take a look at
> Mumit Kahn's "HOWTO build GCC-2.95.2 on Cygb20.1"

Not if you want reliable code from your compiler. I've run into too many
bugs in pgcc to endorse it, sorry. Btw, similarly for the compiler in
Cygwin v1.0 -- it's faster than gcc-2.95.2 (and for certain types of
code, must faster), but it's too buggy to be reliable.

> PGCC claims to be up to 30% faster than gcc but has no support for the
> latest stuff like PIII's ISSE or K7
> btw, stable stuff is merged into gcc after some time

There's an inherent trade-off with speed and reliability, at least in
this particular case. Some pgcc changes have been merged into gcc 
starting with egcs-1.1.x, and more will over time. The new backend,
contributed by Cygnus, is however good enough to stand on its own.

Regards,
Mumit


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