From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!.POSTED!not-for-mail From: Eli Zaretskii Newsgroups: gmane.emacs.devel Subject: Re: Preview: portable dumper Date: Sat, 03 Dec 2016 18:42:14 +0200 Message-ID: <83twalklqx.fsf@gnu.org> References: <<<047a67ec-9e29-7e4e-0fb0-24c3e59b5886@dancol.org> <83zikjxt1j.fsf@gnu.org>>> << <8360n6ruzu.fsf@gnu.org>>> << <834m2nplmb.fsf@gnu.org> <83inr2oje6.fsf@gnu.org>>> << <83shq6mlt3.fsf@gnu.org>>> <<>> <<>> <<2b63d48d-a678-49c2-a3a9-4f91d8d8bdb4@default>> <<8337i5mnb5.fsf@gnu.org>> <01a025df-3995-4657-9658-72656185873b@default> Reply-To: Eli Zaretskii NNTP-Posting-Host: blaine.gmane.org X-Trace: blaine.gmane.org 1480783414 4338 195.159.176.226 (3 Dec 2016 16:43:34 GMT) X-Complaints-To: usenet@blaine.gmane.org NNTP-Posting-Date: Sat, 3 Dec 2016 16:43:34 +0000 (UTC) Cc: emacs-devel@gnu.org, rms@gnu.org, drew.adams@oracle.com, monnier@iro.umontreal.ca To: Drew Adams Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Sat Dec 03 17:43:24 2016 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by blaine.gmane.org with esmtp (Exim 4.84_2) (envelope-from ) id 1cDDPI-0007vt-KU for ged-emacs-devel@m.gmane.org; Sat, 03 Dec 2016 17:43:24 +0100 Original-Received: from localhost ([::1]:51698 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cDDPM-00063R-Jp for ged-emacs-devel@m.gmane.org; Sat, 03 Dec 2016 11:43:28 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:48152) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cDDOj-000613-6l for emacs-devel@gnu.org; Sat, 03 Dec 2016 11:42:50 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1cDDOf-0000lT-6g for emacs-devel@gnu.org; Sat, 03 Dec 2016 11:42:49 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:47882) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1cDDOf-0000lP-3c; Sat, 03 Dec 2016 11:42:45 -0500 Original-Received: from 84.94.185.246.cable.012.net.il ([84.94.185.246]:4129 helo=home-c4e4a596f7) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_256_CBC_SHA1:256) (Exim 4.82) (envelope-from ) id 1cDDOV-00072m-KC; Sat, 03 Dec 2016 11:42:38 -0500 In-reply-to: <01a025df-3995-4657-9658-72656185873b@default> (message from Drew Adams on Sat, 3 Dec 2016 08:14:35 -0800 (PST)) X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.2.x-3.x [generic] X-Received-From: 2001:4830:134:3::e X-BeenThere: emacs-devel@gnu.org X-Mailman-Version: 2.1.21 Precedence: list List-Id: "Emacs development discussions." List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Original-Sender: "Emacs-devel" Xref: news.gmane.org gmane.emacs.devel:209985 Archived-At: > Date: Sat, 3 Dec 2016 08:14:35 -0800 (PST) > From: Drew Adams > Cc: rms@gnu.org, monnier@iro.umontreal.ca, emacs-devel@gnu.org > > > > > Only rarely have we made changes that would prevent this. > > > > > > That used to be the case. Now, nearly every major release is > > > incompatible, AFAICT. As far as I can see, long gone are the > > > days when you could byte-compile in an older version and use > > > the byte-compiled code in a newer version. > > > > I'm not aware of such problems. AFAIK, we only made an incompatible > > change once, in Emacs 23. The byte-compiled files compiled by later > ^^^^^^^^^^^ ^^^^^^^^^^^^^^^^^ > > versions should all be compatible. If you see a problem with that, > > please report it as a bug. > > A change _in_ 23? Or a change _after_ 23? The former, AFAIK. > Are you suggesting that if someone can report a true > incompatibility introduced after Emacs 23 you will actually > change the byte compiler to remove it, and that you will > backport that fix to where it was introduced and later > releases? (Otherwise, the fix doesn't really help.) I don't know, but at least we will know where we stand.