From owner-freebsd-questions@FreeBSD.ORG  Sun Feb 28 13:00:58 2010
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 5A63E106566C
	for <freebsd-questions@freebsd.org>;
	Sun, 28 Feb 2010 13:00:58 +0000 (UTC)
	(envelope-from aaron.lewis1989@gmail.com)
Received: from mail-pw0-f54.google.com (mail-pw0-f54.google.com
	[209.85.160.54])
	by mx1.freebsd.org (Postfix) with ESMTP id 2FFF38FC34
	for <freebsd-questions@freebsd.org>;
	Sun, 28 Feb 2010 13:00:57 +0000 (UTC)
Received: by pwj7 with SMTP id 7so1242701pwj.13
	for <freebsd-questions@freebsd.org>;
	Sun, 28 Feb 2010 05:00:52 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=gamma;
	h=domainkey-signature:received:received:message-id:date:from
	:user-agent:mime-version:to:subject:content-type
	:content-transfer-encoding;
	bh=M135OQPm4I55qFwy/Hx24ECptzUNTxJKjNjIMFnDNk0=;
	b=ekqSCk/mW8McG1bsGSZWPttb6tR/7yvHCqs74QNpB4sLh9D4dT1BUq8Gcl2rhgXfDb
	JLM/Fz83o+LYeadmG9rz1cIYfHhTO7MyT6xQz+RF2f8H+HVYSMy/FB0wA26hvJID0cil
	/Ev/7DRema5dczRt477DASxYu0X18Id6k1Y9k=
DomainKey-Signature: a=rsa-sha1; c=nofws; d=gmail.com; s=gamma;
	h=message-id:date:from:user-agent:mime-version:to:subject
	:content-type:content-transfer-encoding;
	b=U1BTi+tKgPkyTwOal21p8N+m3BQ15f1lfY8GR9X1YYlBio01HKosPmhE7tk4w1zu3x
	96QblXhYQcxkPHeUTn/rOX+LlgBjK7mxwHJJhCeEc48cYliaQoamNtiiZfzHURbP3Zgk
	Tx8QGZjnMvP5n/fBTj8Pt1J+ceCmFeDCPsnnw=
Received: by 10.140.87.23 with SMTP id k23mr1683862rvb.292.1267360724353;
	Sun, 28 Feb 2010 04:38:44 -0800 (PST)
Received: from ?192.168.0.101? ([112.229.152.74])
	by mx.google.com with ESMTPS id 23sm2481203pzk.14.2010.02.28.04.38.42
	(version=TLSv1/SSLv3 cipher=RC4-MD5);
	Sun, 28 Feb 2010 04:38:43 -0800 (PST)
Message-ID: <4B8A63D5.90104@gmail.com>
Date: Sun, 28 Feb 2010 20:38:45 +0800
From: Aaron Lewis <aaron.lewis1989@gmail.com>
User-Agent: Thunderbird 2.0.0.22 (X11/20090608)
MIME-Version: 1.0
To: freebsd-questions@freebsd.org
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 7bit
Subject: Compiler Flags problem with core2 CPU
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 28 Feb 2010 13:00:58 -0000

Hi,
    I gonna recompile kernel for my core2 CPU , so i'd like to pass some 
flags to gcc.
    Kinds of "-march=core2" , i tried to modify /etc/make.conf
   
    e.g    CFLAGS += -march=core2 -O20 -ffast-math -mfpmath=sse
    But it fails .. bad arch switch , core2 cpu is not supported ?

    And is that useful to let gcc select cpu specified asm code ?

-- 
Best Regards,
Aaron Lewis - PGP: 0xA476D2E9
irc: A4r0n on freenode