From owner-cvs-src@FreeBSD.ORG Thu Oct 25 21:35:26 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 B325B16A41B; Thu, 25 Oct 2007 21:35:26 +0000 (UTC) (envelope-from kensmith@cse.Buffalo.EDU) Received: from phoebe.cse.buffalo.edu (phoebe.cse.buffalo.edu [128.205.32.89]) by mx1.freebsd.org (Postfix) with ESMTP id 02CA413C48A; Thu, 25 Oct 2007 21:35:25 +0000 (UTC) (envelope-from kensmith@cse.Buffalo.EDU) Received: from [192.168.1.101] (cpe-74-77-179-53.buffalo.res.rr.com [74.77.179.53]) (authenticated bits=0) by phoebe.cse.buffalo.edu (8.14.1/8.13.7) with ESMTP id l9PLYw7m004320 (version=TLSv1/SSLv3 cipher=RC4-MD5 bits=128 verify=NO); Thu, 25 Oct 2007 17:35:08 -0400 (EDT) (envelope-from kensmith@cse.buffalo.edu) From: Ken Smith To: Andrey Chernov In-Reply-To: <20071025191437.GD16187@nagual.pp.ru> References: <200710150951.l9F9pUm7026506@repoman.freebsd.org> <4720B30F.4040903@samsco.org> <20071025151707.GA11398@nagual.pp.ru> <4720E0AF.1010004@samsco.org> <4720E904.2090704@delphij.net> <4720EA15.40002@samsco.org> <20071025191437.GD16187@nagual.pp.ru> Content-Type: text/plain Date: Thu, 25 Oct 2007 17:31:03 -0400 Message-Id: <1193347863.93167.11.camel@neo.cse.buffalo.edu> Mime-Version: 1.0 X-Mailer: Evolution 2.8.2.1 FreeBSD GNOME Team Port Content-Transfer-Encoding: 7bit X-DCC-Buffalo.EDU-Metrics: phoebe.cse.buffalo.edu 1029; Body=0 Fuz1=0 Fuz2=0 X-Spam-Status: No, score=0.1 required=5.0 tests=RDNS_DYNAMIC autolearn=no version=3.2.3 X-Spam-Checker-Version: SpamAssassin 3.2.3 (2007-08-08) on phoebe.cse.buffalo.edu Cc: cvs-src@FreeBSD.org, Scott Long , src-committers@FreeBSD.org, d@delphij.net, cvs-all@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 21:35:26 -0000 On Thu, 2007-10-25 at 23:14 +0400, Andrey Chernov wrote: > On Thu, Oct 25, 2007 at 01:10:13PM -0600, Scott Long 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. Personally I think this is acceptable, but maybe we > >> could have a better way to avoid this, because the binaries are no > >> longer backward compatible (i.e. you may have trouble running a program > >> compiled for 6.3-RELEASE on 6.2-RELEASE, if it uses locale bits). > > > > If this is true, then it directly violates the API/ABI compatability > > guidelines that were developed and agreed to by the project in 2005. > > We define only backward compatibility, not forward one. Do you f.e. expect > to run 7x binaries on 6x as is? At least compat7x required (if all syscall > are the same). > That's not what Scott was referring to. It's expected that 8.X binaries *may* not run on 7.X without compat libraries or something along those lines. That said this sort of breakage is what I was hoping we could avoid having happen before 7.0 was out the door (it's what I meant by asking people to be a bit conservative until we're done with 7.0) because it does tend to add to peoples' general frustration level at a time there is enough stress coming from other sources. What we need to try and avoid unless *absolutely* *necessary* is the part Scott quoted above - binaries compiled on 6.3-REL should work on 6.2-REL unless there was a really big issue and the solution to that issue required us to break that. The reason is simple, people should be able to continue running 6.2-REL "for a while" and still be able to update their packages from packages-6-stable even after portmgr@ starts using a 6.3-REL base for the builds (I think they use RELENG_6 for the most part but I could be wrong). And this sort of backwards compatibility is a big help to large sites that do things like have an NFS server where local software gets installed (we build stuff and stick it in /util/bin which is NFS mounted from one machine). Its a big help running a site like this if all machines don't need to be at exactly the same OS rev as the server. -- Ken Smith - From there to here, from here to | kensmith@cse.buffalo.edu there, funny things are everywhere. | - Theodore Geisel |