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From: Michael Meissner <meissner AT cygnus DOT com>
Message-ID: <20000308230014.18478@cse.cygnus.com>
Date: Wed, 8 Mar 2000 23:00:14 -0500
To: DJ Delorie <dj AT delorie DOT com>
Cc: Brendan DOT Simon AT ctam DOT com DOT au, cygwin AT sourceware DOT cygnus DOT com
Subject: Re: cygwin-inst-20000304 query
References: <38C441C9 DOT D83FB437 AT ctam DOT com DOT au> <200003070146 DOT UAA19157 AT envy DOT delorie DOT com> <38C5820D DOT 23D114E1 AT ctam DOT com DOT au> <200003080020 DOT TAA26089 AT envy DOT delorie DOT com> <38C70079 DOT FCDADBF4 AT ctam DOT com DOT au> <200003090308 DOT WAA29406 AT envy DOT delorie DOT com>
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In-Reply-To: <200003090308.WAA29406@envy.delorie.com>; from DJ Delorie on Wed, Mar 08, 2000 at 10:08:13PM -0500

On Wed, Mar 08, 2000 at 10:08:13PM -0500, DJ Delorie wrote:
> 
> > If they are just names that are independent of architecture, then
> > why is there any need to mention the architecture ?
> 
> Well, so you can tell the difference between those and, say,
> ppc-pc-cygwin.  Or, i86-pc-cygwin (if a 16-bit version were even
> possible).
> 
> > Furthermore, what is the point of changing the name of the
> > architecture if there is no difference ?
> 
> Marketing.  People don't like buying software for "older" computers.
> Plus, "uname" returns the actual cpu, and config.guess uses that, so
> if you built cygwin on a 486, it would default to i486-pc-cygwin
> because that's what you built it on.  We all have 686's so that's our
> default.

It does mean that by default a i686-pc-cygwin compiler will optimize for a i686
(aka, pentium-II and pentium-III), but it won't generate any instructions that
aren't common across the x86 architecture (ie, cmov and fcmov).

-- 
Michael Meissner, Cygnus Solutions, a Red Hat company.
PMB 198, 174 Littleton Road #3, Westford, Massachusetts 01886, USA
Work:	  meissner AT redhat DOT com		phone: +1 978-486-9304
Non-work: meissner AT spectacle-pond DOT org	fax:   +1 978-692-4482

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