From owner-freebsd-bugs@FreeBSD.ORG  Sun Sep  5 01:30:06 2010
Return-Path: <owner-freebsd-bugs@FreeBSD.ORG>
Delivered-To: freebsd-bugs@hub.freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id E76E61065670
	for <freebsd-bugs@hub.freebsd.org>;
	Sun,  5 Sep 2010 01:30:05 +0000 (UTC)
	(envelope-from gnats@FreeBSD.org)
Received: from freefall.freebsd.org (freefall.freebsd.org
	[IPv6:2001:4f8:fff6::28])
	by mx1.freebsd.org (Postfix) with ESMTP id BC2818FC1A
	for <freebsd-bugs@hub.freebsd.org>;
	Sun,  5 Sep 2010 01:30:05 +0000 (UTC)
Received: from freefall.freebsd.org (localhost [127.0.0.1])
	by freefall.freebsd.org (8.14.4/8.14.4) with ESMTP id o851U5II048739
	for <freebsd-bugs@freefall.freebsd.org>; Sun, 5 Sep 2010 01:30:05 GMT
	(envelope-from gnats@freefall.freebsd.org)
Received: (from gnats@localhost)
	by freefall.freebsd.org (8.14.4/8.14.4/Submit) id o851U5Gw048733;
	Sun, 5 Sep 2010 01:30:05 GMT (envelope-from gnats)
Date: Sun, 5 Sep 2010 01:30:05 GMT
Message-Id: <201009050130.o851U5Gw048733@freefall.freebsd.org>
To: freebsd-bugs@FreeBSD.org
From: "b. f." <bf1783@googlemail.com>
Cc: 
Subject: Re: conf/112997: [patch] Add note about the 'native' mtune option
	to share/examples/etc/make.conf
X-BeenThere: freebsd-bugs@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
Reply-To: "b. f." <bf1783@googlemail.com>
List-Id: Bug reports <freebsd-bugs.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-bugs>
List-Post: <mailto:freebsd-bugs@freebsd.org>
List-Help: <mailto:freebsd-bugs-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-bugs>,
	<mailto:freebsd-bugs-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 05 Sep 2010 01:30:06 -0000

The following reply was made to PR conf/112997; it has been noted by GNATS.

From: "b. f." <bf1783@googlemail.com>
To: bug-followup@FreeBSD.org
Cc: Scot Hetzel <swhetzel@gmail.com>
Subject: Re: conf/112997: [patch] Add note about the 'native' mtune option to share/examples/etc/make.conf
Date: Sun, 5 Sep 2010 01:22:03 +0000

 It is very inefficient to invoke gcc, grep, and/or awk every time this
 makefile is processed.  (In the past, we've gone to a great deal of
 trouble to avoid this kind of thing:
 
 http://lists.freebsd.org/pipermail/freebsd-ports/2008-July/049777.html
 http://lists.freebsd.org/pipermail/cvs-ports/2008-July/153224.html
 
 )  Instead, I think that comments in /etc/make.conf instructing users
 to how to correctly specify their CPUTYPE would be appropriate.  The
 list of overrides for the base system compiler should be expanded, and
 perhaps relaxed if CC != cc.  But _all_ overrides cannot be removed,
 and MACHINE_CPU cannot be expanded to include all features recognized
 by compilers from ports, because the kernel lacks the necessary
 support for things like SSE5/XOP+FMA4+CVT16, LWP, AVX, etc.
 
 b.