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Date: Sun, 31 Oct 2004 02:35:24 -0700
From: Brian Inglis <Brian DOT Inglis AT SystematicSw DOT ab DOT ca>
Subject: Re: gcc-3.4 and option -mcpu
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On Thu, 28 Oct 2004 09:27:19 +0300, Andris Pavenis <pavenis AT latnet DOT lv>
wrote:

>On Wednesday 27 October 2004 21:27, Eli Zaretskii wrote:
>> > From: Andris Pavenis <pavenis AT latnet DOT lv>
>> > Date: Wed, 27 Oct 2004 18:28:56 +0300
>> >
>> > GCC command line option -mcpu is used to build DJGPP runtime. This option
>> > is deprecated in gcc-3.4.X.
>>
>> Why in the world do they make these incompatible changes?  What's
>> wrong with -mcpu, anyway?

The alternative would probably have been to change -mcpu to mean
-march, as that's what some (most?) people expect from -mcpu! 

>Maybe -mtune is a bit less confusing.

There have been a couple of postings on the djgpp list/NG(s) where
programmers expected the "vague" -mcpu to select the (-march)
instruction repertoire and complained because they weren't getting the
expected code: one had the default changed to pentium and found his
code wouldn't run on 386s, and another was getting slow code on his
pentium IIRC.