From owner-freebsd-current@FreeBSD.ORG  Fri Nov 17 13:40:40 2006
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
X-Original-To: freebsd-current@freebsd.org
Delivered-To: freebsd-current@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 90A1316A47E;
	Fri, 17 Nov 2006 13:40:40 +0000 (UTC) (envelope-from avg@icyb.net.ua)
Received: from citadel.icyb.net.ua (citadel.icyb.net.ua [212.40.38.140])
	by mx1.FreeBSD.org (Postfix) with ESMTP id BA33E43D6D;
	Fri, 17 Nov 2006 13:40:08 +0000 (GMT) (envelope-from avg@icyb.net.ua)
Received: from [212.40.38.87] (oddity-e.topspin.kiev.ua [212.40.38.87])
	by citadel.icyb.net.ua (8.8.8p3/ICyb-2.3exp) with ESMTP id PAA27017;
	Fri, 17 Nov 2006 15:40:05 +0200 (EET) (envelope-from avg@icyb.net.ua)
Message-ID: <455DBBB4.7010501@icyb.net.ua>
Date: Fri, 17 Nov 2006 15:40:04 +0200
From: Andriy Gapon <avg@icyb.net.ua>
User-Agent: Thunderbird 1.5.0.8 (X11/20061113)
MIME-Version: 1.0
To: Alexander Kabaev <kabaev@gmail.com>
References: <1163701391.00638085.1163691003@10.7.7.3>	<455CB8CA.8040603@icyb.net.ua>	<200611161506.58128.jkim@FreeBSD.org>	<20061116215639.73d00824@kan.dnsalias.net>	<20061117075724.GB21627@rambler-co.ru>
	<20061117083311.5ec6aee2@kan.dnsalias.net>
In-Reply-To: <20061117083311.5ec6aee2@kan.dnsalias.net>
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: 7bit
Cc: freebsd-fs@freebsd.org, freebsd-current@freebsd.org,
	Jung-uk Kim <jkim@freebsd.org>
Subject: Re: ZFS patches for FreeBSD.
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Fri, 17 Nov 2006 13:40:40 -0000

on 17/11/2006 15:33 Alexander Kabaev said the following:
> On Fri, 17 Nov 2006 10:57:24 +0300
> Ruslan Ermilov <ru@freebsd.org> wrote:
> 
>> On Thu, Nov 16, 2006 at 09:56:39PM -0500, Alexander Kabaev wrote:
>>> This is not a GCC bug. -ffreestanding is _documented_ as requiring
>>> memset and friends as resolvable extern symbols. We were just lucky
>>> to get away without it before.
>>>
>> Yes.  But to make it clear: it's there in libkern.h, just not
>> external.
>>
> 
> inline definitions do not satisfy the requirement. So memset is NOT
> there. I implemented simple-minded amd64 and i386 vesrions for GCC4
> import.  

And just for the record: I got an impression from a message in a
parallel branch of this discussion thread that the compiler behavior in
this respect might also depend on optimization level, which probably
doesn't mean much for practical usage, but might be an interesting factoid.


-- 
Andriy Gapon