From mboxrd@z Thu Jan 1 00:00:00 1970 Path: news.gmane.org!not-for-mail From: ludo@gnu.org (Ludovic =?utf-8?Q?Court=C3=A8s?=) Newsgroups: gmane.emacs.devel Subject: Re: [PATCH PING] Honor 'SOURCE_DATE_EPOCH' when generating autoloads. Date: Tue, 08 Dec 2015 00:11:46 +0100 Message-ID: <87r3ixrgzx.fsf@gnu.org> References: <87k2ph3mgx.fsf@gnu.org> <87io4lnkyz.fsf@gnu.org> <83mvtwoktg.fsf@gnu.org> <878u5gkakj.fsf@gnu.org> <83a8pwoesc.fsf@gnu.org> <87two3475d.fsf@gnu.org> NNTP-Posting-Host: plane.gmane.org Mime-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: quoted-printable X-Trace: ger.gmane.org 1449529938 15175 80.91.229.3 (7 Dec 2015 23:12:18 GMT) X-Complaints-To: usenet@ger.gmane.org NNTP-Posting-Date: Mon, 7 Dec 2015 23:12:18 +0000 (UTC) Cc: Eli Zaretskii , alezost@gmail.com, emacs-devel@gnu.org To: Philipp Stephani Original-X-From: emacs-devel-bounces+ged-emacs-devel=m.gmane.org@gnu.org Tue Dec 08 00:11:59 2015 Return-path: Envelope-to: ged-emacs-devel@m.gmane.org Original-Received: from lists.gnu.org ([208.118.235.17]) by plane.gmane.org with esmtp (Exim 4.69) (envelope-from ) id 1a64wm-0007Rx-SS for ged-emacs-devel@m.gmane.org; Tue, 08 Dec 2015 00:11:57 +0100 Original-Received: from localhost ([::1]:56929 helo=lists.gnu.org) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a64wm-0003Qz-4t for ged-emacs-devel@m.gmane.org; Mon, 07 Dec 2015 18:11:56 -0500 Original-Received: from eggs.gnu.org ([2001:4830:134:3::10]:48327) by lists.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a64wi-0003Qm-Vl for emacs-devel@gnu.org; Mon, 07 Dec 2015 18:11:53 -0500 Original-Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71) (envelope-from ) id 1a64wg-0001L6-AB for emacs-devel@gnu.org; Mon, 07 Dec 2015 18:11:52 -0500 Original-Received: from fencepost.gnu.org ([2001:4830:134:3::e]:46686) by eggs.gnu.org with esmtp (Exim 4.71) (envelope-from ) id 1a64wg-0001L2-7g; Mon, 07 Dec 2015 18:11:50 -0500 Original-Received: from reverse-83.fdn.fr ([80.67.176.83]:42202 helo=pluto) by fencepost.gnu.org with esmtpsa (TLS1.2:RSA_AES_128_CBC_SHA1:128) (Exim 4.82) (envelope-from ) id 1a64wf-00080Y-4t; Mon, 07 Dec 2015 18:11:49 -0500 X-URL: http://www.fdn.fr/~lcourtes/ X-Revolutionary-Date: 18 Frimaire an 224 de la =?utf-8?Q?R=C3=A9volution?= X-PGP-Key-ID: 0x3D9AEBB5 X-PGP-Key: http://www.fdn.fr/~lcourtes/ludovic.asc X-PGP-Fingerprint: 3CE4 6455 8A84 FDC6 9DB4 0CFB 090B 1199 3D9A EBB5 X-OS: x86_64-unknown-linux-gnu In-Reply-To: (Philipp Stephani's message of "Mon, 07 Dec 2015 18:36:19 +0000") User-Agent: Gnus/5.13 (Gnus v5.13) Emacs/24.5 (gnu/linux) 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: 2.1.14 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-bounces+ged-emacs-devel=m.gmane.org@gnu.org Xref: news.gmane.org gmane.emacs.devel:195975 Archived-At: Philipp Stephani skribis: > I'm interested in reproducible builds as well; do you already have some > design ideas how to tackle this problem? So far I've found three areas > where Emacs itself builds something that could be reproducible (dumping, > generating autoload files, byte compilation), and a couple of data items > that cause irreproducibility (host names, timestamps, absolute paths). There are two things at stake here: making Emacs builds reproducible, and making Emacs produce deterministic output. If autoload generation is non-deterministic, then every elisp package ends up being non-deterministic. So fixing it is a net win, and that=E2=80= =99s the reason why we started with this one. The other issues affect only Emacs itself. Timestamps and the likes are easily addressed I guess. Unexec is likely another story, though. Ludo=E2=80=99.