Date: Fri, 23 Feb 2001 03:22:03 -0800 From: "David O'Brien" <obrien@FreeBSD.ORG> To: Alexander Leidinger <Alexander@Leidinger.net> Cc: cvs-committers@FreeBSD.ORG, cvs-all@FreeBSD.ORG Subject: Re: cvs commit: src/share/mk sys.mk Message-ID: <20010223032203.A1785@dragon.nuxi.com> In-Reply-To: <200102221219.f1MCJSF08422@Magelan.Leidinger.net>; from Alexander@Leidinger.net on Thu, Feb 22, 2001 at 01:19:26PM %2B0100 References: <20010221114805.A96924@dragon.nuxi.com> <200102221219.f1MCJSF08422@Magelan.Leidinger.net>
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On Thu, Feb 22, 2001 at 01:19:26PM +0100, Alexander Leidinger wrote:
> On 21 Feb, David O'Brien wrote:
>
> >> BTW, may be -mcpu=${MACHINE_CPU} can be added to the default CFLAGS now?
> >
> > I am nervous about this on the Alpha unless very well tested. We all
> > know that an ev4 system as the ev4 cannot handled ev56-only instructions.
> > [note the release building box and package cluster are ev56 machines]
> > According to the GCC manual for 3.0 (in development), -mcpu on the Alpha
> > includes the functionality of -march:
>
> [Quoting the docs]
>
> Reading "man gcc" on my -current (gcc 2.95.3) I interpret this as:
> - -mcpu does the _instruction scheduling_ for the specified CPU
> - -march _uses instructions_ of the specified CPU
See the manual at http://gcc.gnu.org, and look at the Alpha specific
options. My read of it makes me want to check this carefully before an
MFC.
--
-- David (obrien@FreeBSD.org)
GNU is Not Unix / Linux Is Not UniX
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