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 1M7gsB-0000KM-6y for garchives@archives.gentoo.org; Sat, 23 May 2009 02:22:07 +0000 Received: from pigeon.gentoo.org (localhost [127.0.0.1]) by pigeon.gentoo.org (Postfix) with SMTP id 7FAB1E02F5; Sat, 23 May 2009 02:22:05 +0000 (UTC) Received: from mail.askja.de (mail.askja.de [83.137.103.136]) by pigeon.gentoo.org (Postfix) with ESMTP id 56D16E02F5 for ; Sat, 23 May 2009 02:22:05 +0000 (UTC) Received: from static-87-79-89-40.netcologne.de ([87.79.89.40] helo=zone.wonkology.org) by mail.askja.de with esmtpsa (TLS1.0:DHE_RSA_AES_256_CBC_SHA1:32) (Exim 4.69) (envelope-from ) id 1M7gs8-0004j6-Pb for gentoo-user@lists.gentoo.org; Sat, 23 May 2009 04:22:04 +0200 Received: from localhost (localhost [127.0.0.1]) (uid 1000) by zone.wonkology.org with local; Sat, 23 May 2009 04:22:02 +0200 id 00010496.4A175DCA.0000200B From: Alex Schuster To: gentoo-user@lists.gentoo.org Subject: Re: [gentoo-user] Re: -march=auto Date: Sat, 23 May 2009 04:21:59 +0200 User-Agent: KMail/1.11.3 (Linux/2.6.28-tuxonice-r3; KDE/4.2.3; i686; ; ) References: <634395.77014.qm@web31605.mail.mud.yahoo.com> In-Reply-To: <634395.77014.qm@web31605.mail.mud.yahoo.com> 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 Content-Disposition: inline Content-Type: Text/Plain; charset="iso-8859-15" Content-Transfer-Encoding: 7bit Message-Id: <200905230422.01149.wonko@wonkology.org> X-Archives-Salt: 25bd7339-3d2a-433c-ac82-c4c0c38b728e X-Archives-Hash: 8f48113b9cfade185ffee90673a291da maxim wexler writes: > > If so, Daniel's tip about 'gcc -Q --help=target -march=native' will give > > you the exact options to use. > See attachment please. Some stuff is enabled, some disabled, some blank. Try this: gcc -Q --help=target -march=native > /tmp/gccoptions.native gcc -Q --help=target > /tmp/gccoptions.plain diff /tmp/gccoptions.* This will show the things that specifying -march=native turns on. Put this in your CFLAGS, unless you use -march=native. > And -march=prescott !? Why not? Seems gcc 4.3 does not have the -march=atom optimization yet. It's also suggested here: http://en.gentoo-wiki.com/wiki/Safe_Cflags/Intel#Atom Wonko