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Fwd: Re: [Fwd: Re: Kernel 2.4 CPU Arch issues]
- From: "William M. Quarles" <quarlewm at jmu dot edu>
- To: gcc-help at gcc dot gnu dot org
- Date: Tue, 22 Jul 2003 19:49:46 -0400
- Subject: Fwd: Re: [Fwd: Re: Kernel 2.4 CPU Arch issues]
Hi,
I heard this gnasty rumor attached below that says that GCC
can't optimize any differently between any of the P6 or later
processors, so that -march=pentiumpro and -march=pentium2 for
example will always compile the same. I have not been able to
find anything in the GCC documentation, buglist, or
limitations list that suggests that this is the case. Is what
this developer telling me true?
Thanks,
William
---- Original message ----
>Date: 21 Jul 2003 07:39:16 +0100
>From: Alan Cox <alan@lxorguk.ukuu.org.uk>
>Subject: Re: [Fwd: Re: Kernel 2.4 CPU Arch issues]
>To: "William M. Quarles" <quarlewm@jmu.edu>
>Cc: Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
>
>On Llu, 2003-07-21 at 01:25, William M. Quarles wrote:
>> Well, wouldn't changing the gcc -march option and/or adding
-mcpu
>> options for the various processors in the Makefile make a
difference, as
>> the patchfile suggests?
>
>Currently - no. gcc knows a lot more processor names that
require individual
>unique optimisation
>
--
William M. Quarles
quarlewm@jmu.edu
walrus@bellsouth.net