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Re: Target CPU default selection on alpha
- To: David Edelsohn <dje at watson dot ibm dot com>
- Subject: Re: Target CPU default selection on alpha
- From: Jeffrey A Law <law at hurl dot cygnus dot com>
- Date: Tue, 22 Dec 1998 14:00:53 -0700
- cc: egcs at egcs dot cygnus dot com, Richard Henderson <rth at cygnus dot com>, Rainer Orth <ro at TechFak dot Uni-Bielefeld dot DE>
- Reply-To: law at cygnus dot com
In message <9812211631.AA30948@marc.watson.ibm.com>you write:
> All operating systems other than AIX default to a particular
> architecture. IBM's XLC compiler for AIX defaults to "common" mode and a
> substantial number of users were getting confused when GCC did not behave
> the same way. Also, the POWER and PowerPC architectures are fixed and not
> changing with each processor revision. And neither POWER nor PowerPC are
> a true subset of the other architecture. It did not make sense for the
> architecture to be decided arbitrarily based on the particular system on
> which GCC was built in a multi-architecture site.
Yea, I remember numerous problems when we did not generate common code on the
rs6000/ppc port in the past. I believe the decision made for the rs6000/ppc
port was the right decision.
What I meant was that it's not clear that generating common code may not be
the best thing to do for each port.
jeff