From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Delivered-To: caml-list@yquem.inria.fr Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by yquem.inria.fr (Postfix) with ESMTP id B1972BB91 for ; Fri, 14 Jan 2005 14:25:21 +0100 (CET) Received: from pauillac.inria.fr (pauillac.inria.fr [128.93.11.35]) by nez-perce.inria.fr (8.13.0/8.13.0) with ESMTP id j0EDPK1M012749 for ; Fri, 14 Jan 2005 14:25:20 +0100 Received: from nez-perce.inria.fr (nez-perce.inria.fr [192.93.2.78]) by pauillac.inria.fr (8.7.6/8.7.3) with ESMTP id OAA22359 for ; Fri, 14 Jan 2005 14:25:20 +0100 (MET) Received: from smtp2.wanadoo.fr (smtp2.wanadoo.fr [193.252.22.29]) by nez-perce.inria.fr (8.13.0/8.13.0) with ESMTP id j0EDPJRh012746 for ; Fri, 14 Jan 2005 14:25:20 +0100 Received: from me-wanadoo.net (localhost [127.0.0.1]) by mwinf0212.wanadoo.fr (SMTP Server) with ESMTP id DB3151C0023C; Fri, 14 Jan 2005 14:25:19 +0100 (CET) Received: from pegasos (AStrasbourg-251-1-61-78.w82-126.abo.wanadoo.fr [82.126.129.78]) by mwinf0212.wanadoo.fr (SMTP Server) with ESMTP id B5E3B1C0020A; Fri, 14 Jan 2005 14:25:19 +0100 (CET) Received: from luther by pegasos with local (Exim 4.34) id 1CpRcu-0001Jk-B3; Fri, 14 Jan 2005 14:36:32 +0100 Date: Fri, 14 Jan 2005 14:36:32 +0100 To: Jacques Garrigue Cc: zack@debian.org, caml-list@inria.fr, debian-ocaml-maint@lists.debian.org Subject: Re: [Caml-list] binary compatibility of 3.08.3 Message-ID: <20050114133632.GA4923@pegasos> Mail-Followup-To: Jacques Garrigue , zack@debian.org, caml-list@inria.fr, debian-ocaml-maint@lists.debian.org References: <99C2C114-6583-11D9-B72B-000D9345235C@inria.fr> <20050113184137.GA24040@fistandantilus.takhisis.org> <20050113.150239.95895778.garrigue@math.nagoya-u.ac.jp> Mime-Version: 1.0 Content-Type: text/plain; charset=iso-8859-1 Content-Disposition: inline In-Reply-To: <20050113.150239.95895778.garrigue@math.nagoya-u.ac.jp> User-Agent: Mutt/1.5.6+20040907i From: Sven Luther X-Miltered: at nez-perce with ID 41E7C840.001 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Miltered: at nez-perce with ID 41E7C840.000 by Joe's j-chkmail (http://j-chkmail.ensmp.fr)! X-Spam: no; 0.00; caml-list:01 binary:01 sven:01 luther:01 sven:01 luther:01 wrote:01 zacchiroli:01 damien:01 wrote:01 binary:01 bug:01 compiler:01 reasonnable:01 bugfix:01 X-Spam-Checker-Version: SpamAssassin 3.0.0 (2004-09-13) on yquem.inria.fr X-Spam-Status: No, score=0.0 required=5.0 tests=none autolearn=disabled version=3.0.0 X-Spam-Level: On Thu, Jan 13, 2005 at 03:02:39PM -0800, Jacques Garrigue wrote: > From: Stefano Zacchiroli > > > On Thu, Jan 13, 2005 at 05:53:07PM +0100, Damien Doligez wrote: > > > Or you can wait a few weeks for 3.08.3. > > > > BTW, do 3.08.3 break binary compatibility with 3.08.2? > > (as happened when upgrading from 3.08.1 to 3.08.2) > > Any bug fix in the compiler has a very high probability of breaking > binary compatibility. This is due to the fact interface digests depend > on the indices of internal identifiers, so that purely internal > changes may break compatibility, eventhough the cmi format is left > unchanged. > It is reasonnable to assume that 3.08.3 will not be binary compatible. Notice that this is really not nice for a bugfix release, since this means we have to rebuild all of the ocaml related packages on all arches, which may take us month and such. Maybe we would be better off just backporting the non-breaking fixes ? Maybe in future this situation could be somewhat improved ? > By the way, due to a bug fix in the variance inference, it will also > not be 100% source compatible, but I hope this has no impact on > existing programs (as only few programs use variance). (I sincerely > hope there were no unsound programs around...) Oh, well. ... Friendly, Sven Luther