From owner-freebsd-hackers@FreeBSD.ORG Thu Oct 21 17:57:52 2010 Return-Path: Delivered-To: hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 2F587106567A for ; Thu, 21 Oct 2010 17:57:52 +0000 (UTC) (envelope-from uqs@spoerlein.net) Received: from acme.spoerlein.net (acme.spoerlein.net [IPv6:2001:470:9a47::1]) by mx1.freebsd.org (Postfix) with ESMTP id 9B8158FC0C for ; Thu, 21 Oct 2010 17:57:51 +0000 (UTC) Received: from acme.spoerlein.net (localhost.spoerlein.net [IPv6:::1]) by acme.spoerlein.net (8.14.4/8.14.4) with ESMTP id o9LHvmkO071356 (version=TLSv1/SSLv3 cipher=DHE-RSA-AES256-SHA bits=256 verify=NO); Thu, 21 Oct 2010 19:57:48 +0200 (CEST) (envelope-from uqs@spoerlein.net) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=spoerlein.net; s=dkim200908; t=1287683868; bh=wcf4Y7+KtEkGaJzl5PDFr04Tl1Po8pjBQK+Wm/JX5bM=; h=Date:From:To:Cc:Subject:Message-ID:References:MIME-Version: Content-Type:In-Reply-To; b=JnHv/+jhblZFLLxT9FHQy6Z/JZPZalZOBBGqizEh/8AYebxEVaWMk/M+TuRhlS7qU 2FaKQbuY1uVnGciIxrcHeAtBuy0fO7eUx3ovk7H6LLTzxPw3fBXRjIPxxY3a3frm+i a9L6h83g38l+rXJeW5s0a5F18rX/RtP/2Rem0TiY= Received: (from uqs@localhost) by acme.spoerlein.net (8.14.4/8.14.4/Submit) id o9LHvmix071355; Thu, 21 Oct 2010 19:57:48 +0200 (CEST) (envelope-from uqs@spoerlein.net) Date: Thu, 21 Oct 2010 19:57:48 +0200 From: Ulrich =?utf-8?B?U3DDtnJsZWlu?= To: Erik Cederstrand Message-ID: <20101021175748.GD19295@acme.spoerlein.net> Mail-Followup-To: Erik Cederstrand , Kostik Belousov , FreeBSD Hackers References: <718D8E86-EA2E-4D07-BAFF-5D8D093FD296@cederstrand.dk> <20101011084733.GM2392@deviant.kiev.zoral.com.ua> <95F3B27C-42E6-4267-9965-AC3219310C35@cederstrand.dk> MIME-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Disposition: inline In-Reply-To: <95F3B27C-42E6-4267-9965-AC3219310C35@cederstrand.dk> User-Agent: Mutt/1.5.21 (2010-09-15) Cc: Kostik Belousov , FreeBSD Hackers Subject: Re: Deterministic builds? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Thu, 21 Oct 2010 17:57:52 -0000 On Mon, 11.10.2010 at 11:35:42 +0200, Erik Cederstrand wrote: > > Den 11/10/2010 kl. 10.47 skrev Kostik Belousov: > > > > My personal opinion that the feature is nice to have. Unless the changes to > > get this working are too large, and, more importantly, unless the maintenance > > cost of having this in good shape is too high, sure we would better have > > deterministic build results. > > > > Also, the deterministic builds require somebody who would monitor the > > feature, either manually, or by setting some bot that automatically > > checks it. Otherwise, I suspect, it will degrade. > > I might want to adopt the task of monitoring the feature. > > I'm beginning to think that it should at least be optional. Removing e.g. build times, mtimes and path to OBJDIR or SRCDIR might not make everyone happy. The problem with making it optional is, that we already have enough flags and knobs. No need in adding more. Besides, why would people want to know the date of the build? Far more important is the date and state of the source for the time of build. So you might want to replace ${BUILDATE} with ${SRCDATE} somehow (time of last commit?). Otherwise, please go for it. It would be nice if two people compiling GENERIC for the same source-base would get identical binaries. Uli