From mboxrd@z Thu Jan 1 00:00:00 1970 Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org) by finch.gentoo.org with esmtp (Exim 4.60) (envelope-from ) id 1OTyFP-0005F0-Ho for garchives@archives.gentoo.org; Wed, 30 Jun 2010 14:26:44 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id C6092E08D2; Wed, 30 Jun 2010 14:26:06 +0000 (UTC) Received: from mail-pw0-f53.google.com (mail-pw0-f53.google.com [209.85.160.53]) by pigeon.gentoo.org (Postfix) with ESMTP id 96DF3E08D2 for ; Wed, 30 Jun 2010 14:26:06 +0000 (UTC) Received: by pwj9 with SMTP id 9so304101pwj.40 for ; Wed, 30 Jun 2010 07:26:06 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma; h=domainkey-signature:mime-version:received:sender:received :in-reply-to:references:date:x-google-sender-auth:message-id:subject :from:to:content-type; bh=au6M67mrwXRhMnxNdPGKSF/gfqq/sFyY4IFkG3uTJNw=; b=KQi3BkeN4xg2E3/Mvk6eUVTEDruTbAVViqPUM+uPH/8lW3UaYz7h7FaI9yrgMTIRuw Lo0lZj+47U4x7DyLql1cZdtkBkesKYZUvm9QhxGO9FJvx8yS9Sq4wOVrfrSYe7AYAuR/ cMyQ0lNLTUyIf9l1/vxy+bCzvh9g0F9pwaNUA= DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma; h=mime-version:sender:in-reply-to:references:date :x-google-sender-auth:message-id:subject:from:to:content-type; b=RywvxaUsTgjtmYKESprfuOPe/OkfT72SDq9RGaFttGx77yP5P7joC0dYuKMN4rUc0k MMboPtwAB//kDPZCPI5LKPV2FiFHFxssrj6sBN3UZ7ZXxPn1Z6SDUbzR8O67vG523hvD 54l5KtHf8MZ0reifkxi5oPeYnGmhXZPIKqqNk= Precedence: bulk List-Post: List-Help: List-Unsubscribe: List-Subscribe: List-Id: Gentoo Linux mail X-BeenThere: gentoo-user@lists.gentoo.org Reply-to: gentoo-user@lists.gentoo.org MIME-Version: 1.0 Received: by 10.143.27.31 with SMTP id e31mr9382576wfj.92.1277907966025; Wed, 30 Jun 2010 07:26:06 -0700 (PDT) Sender: paul.hartman@gmail.com Received: by 10.151.102.3 with HTTP; Wed, 30 Jun 2010 07:26:05 -0700 (PDT) In-Reply-To: <1277862850.1329505.6.camel@paska> References: <4C2A95DB.50000@gmx.com> <4C2A9936.6090505@thehenderson.com> <1277862850.1329505.6.camel@paska> Date: Wed, 30 Jun 2010 09:26:05 -0500 X-Google-Sender-Auth: 41xWzOvnAY83sPoz5CbAS479ZyU Message-ID: Subject: Re: [gentoo-user] -march=native From: Paul Hartman To: gentoo-user@lists.gentoo.org Content-Type: text/plain; charset=ISO-8859-1 X-Archives-Salt: 12c8df3d-8ce4-47a5-b2d2-3e222fdd44b8 X-Archives-Hash: 1617c4be514eef65a540f283c71d1898 On Tue, Jun 29, 2010 at 8:54 PM, Albert Hopkins wrote: > On Wed, 2010-06-30 at 11:09 +1000, Beau Henderson wrote: >> On 06/30/10 08:07, Paul Hartman wrote: > [...] >> > You can see which options -march=native would use by running this command: >> > >> > gcc -Q --help=target -march=native >> > >> > (thanks to Daniel Iliev for the tip) >> > >> >> Perhaps I'm missing something but running the above gives me the impression that -march=native >> actually only configures the bare minimal install. I'm not seeing -mmmx or -msse3 enabled on my >> k8-sse3 for instance ( amongst much else ). >> > > -march sometimes implies a some things. E.g., anything above a pentium2 > implies MMX. My hunch is that k8-sse3 implies... sse3. See this page of the GCC documentation for some info about what is enabled in the different arches: http://gcc.gnu.org/onlinedocs/gcc-4.4.3/gcc/i386-and-x86_002d64-Options.html