From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 2344 invoked by alias); 9 Feb 2008 04:41:38 -0000 Received: (qmail 2336 invoked by uid 22791); 9 Feb 2008 04:41:38 -0000 X-Spam-Check-By: sourceware.org Received: from smtp-out.google.com (HELO smtp-out.google.com) (216.239.45.13) by sourceware.org (qpsmtpd/0.31) with ESMTP; Sat, 09 Feb 2008 04:41:19 +0000 Received: from zps19.corp.google.com (zps19.corp.google.com [172.25.146.19]) by smtp-out.google.com with ESMTP id m194fFdH013383; Fri, 8 Feb 2008 20:41:15 -0800 Received: from smtp.corp.google.com (spacemonkey3.corp.google.com [192.168.120.116]) by zps19.corp.google.com with ESMTP id m194fER9003110 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 8 Feb 2008 20:41:14 -0800 Received: from localhost.localdomain.google.com (adsl-76-249-168-94.dsl.pltn13.sbcglobal.net [76.249.168.94]) (authenticated bits=0) by smtp.corp.google.com (8.13.8/8.13.8) with ESMTP id m194fD0G030420 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NOT); Fri, 8 Feb 2008 20:41:14 -0800 To: "Frank W. Miller" Cc: Subject: Re: 64-bit for OS kernel development References: <20080209025421.E0B23E3800F@smtpauth02.csee.onr.siteprotect.com> From: Ian Lance Taylor Date: Sat, 09 Feb 2008 04:41:00 -0000 In-Reply-To: <20080209025421.E0B23E3800F@smtpauth02.csee.onr.siteprotect.com> Message-ID: User-Agent: Gnus/5.09 (Gnus v5.9.0) Emacs/21.4 MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii X-IsSubscribed: yes Mailing-List: contact gcc-help-help@gcc.gnu.org; run by ezmlm Precedence: bulk List-Id: List-Archive: List-Post: List-Help: Sender: gcc-help-owner@gcc.gnu.org X-SW-Source: 2008-02/txt/msg00070.txt.bz2 "Frank W. Miller" writes: > Another question, if I want to optimize for core 2 duo, what -mtune should I > use? -mtune=core2. But it's not supported in gcc 4.2.x. It will be supported in gcc 4.3.0 when it comes out. In 4.2 it's probably best to use -mtune=generic, which is the default anyhow. Ian