From owner-cvs-src@FreeBSD.ORG Thu Oct 25 23:04:36 2007 Return-Path: Delivered-To: cvs-src@FreeBSD.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id AC7A216A417; Thu, 25 Oct 2007 23:04:36 +0000 (UTC) (envelope-from scottl@samsco.org) Received: from pooker.samsco.org (pooker.samsco.org [168.103.85.57]) by mx1.freebsd.org (Postfix) with ESMTP id 5240513C4A6; Thu, 25 Oct 2007 23:04:35 +0000 (UTC) (envelope-from scottl@samsco.org) Received: from phobos.samsco.home (phobos.samsco.home [192.168.254.11]) (authenticated bits=0) by pooker.samsco.org (8.13.8/8.13.8) with ESMTP id l9PN4Qlu064801; Thu, 25 Oct 2007 17:04:26 -0600 (MDT) (envelope-from scottl@samsco.org) Message-ID: <472120E8.90504@samsco.org> Date: Thu, 25 Oct 2007 17:04:08 -0600 From: Scott Long User-Agent: Mozilla/5.0 (Macintosh; U; Intel Mac OS X; en-US; rv:1.8.1.6) Gecko/20070802 SeaMonkey/1.1.4 MIME-Version: 1.0 To: Robert Watson References: <200710150951.l9F9pUm7026506@repoman.freebsd.org> <4720B30F.4040903@samsco.org> <20071025151707.GA11398@nagual.pp.ru> <4720E0AF.1010004@samsco.org> <4720E904.2090704@delphij.net> <20071025191127.GC16187@nagual.pp.ru> <20071025233536.B99770@fledge.watson.org> In-Reply-To: <20071025233536.B99770@fledge.watson.org> Content-Type: text/plain; charset=ISO-8859-1; format=flowed Content-Transfer-Encoding: 7bit X-Greylist: Sender succeeded SMTP AUTH authentication, not delayed by milter-greylist-2.0.2 (pooker.samsco.org [168.103.85.57]); Thu, 25 Oct 2007 17:04:26 -0600 (MDT) X-Spam-Status: No, score=-1.4 required=5.5 tests=ALL_TRUSTED autolearn=failed version=3.1.8 X-Spam-Checker-Version: SpamAssassin 3.1.8 (2007-02-13) on pooker.samsco.org Cc: Andrey Chernov , src-committers@FreeBSD.org, d@delphij.net, cvs-all@FreeBSD.org, cvs-src@FreeBSD.org Subject: Re: cvs commit: src/lib/libc/locale utf8.c X-BeenThere: cvs-src@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: CVS commit messages for the src tree List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 25 Oct 2007 23:04:36 -0000 Robert Watson wrote: > On Thu, 25 Oct 2007, Andrey Chernov wrote: > >> On Thu, Oct 25, 2007 at 12:05:40PM -0700, LI Xin wrote: >>> Well, I think the problem is not exposing a new symbol by itself, but >>> __mb_sb_limit is being used in _ctype.h, in a form of __inline >>> functions. Therefore, the change will break new binaries running on >>> older systems. >> >> Yes. Only vice versa compatibility supported. > > I think the issue here is that the change occurred very quickly after > the branch, and when users wanted to 'change gears' back to RELENG_7 > from HEAD once it was created immediately ran into the problem. It > seems like a useful piece of post-branch advice to developers in the > future will be, "Please don't do things that make switching branches -- > back or forward -- for the first few weeks after the branch is > created". In general, I don't think we care about forward > compatibility, but we are currently getting lots of reports because this > is one of those few times where a lot of moving backward happens. > We do care about forward compatibility within STABLE branches, as Ken and I have discussed in side threads. But yes, forward compat between major branches is merely desired; i.e. changes will happen, and hopefully not for gratuitous reasons. Scott