From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received: (qmail 114496 invoked by alias); 4 May 2016 14:30:29 -0000 Mailing-List: contact cygwin-help@cygwin.com; run by ezmlm Precedence: bulk List-Id: List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner@cygwin.com Mail-Followup-To: cygwin@cygwin.com Received: (qmail 114260 invoked by uid 89); 4 May 2016 14:30:28 -0000 Authentication-Results: sourceware.org; auth=none X-Virus-Found: No X-Spam-SWARE-Status: No, score=-0.0 required=5.0 tests=AWL,BAYES_05,RCVD_IN_DNSWL_LOW autolearn=ham version=3.3.2 spammy=sk:listsd, obstacles, H*MI:sk:ff5f5b2, H*f:sk:ff5f5b2 X-HELO: nm22-vm4.access.bullet.mail.gq1.yahoo.com Received: from nm22-vm4.access.bullet.mail.gq1.yahoo.com (HELO nm22-vm4.access.bullet.mail.gq1.yahoo.com) (216.39.63.110) by sourceware.org (qpsmtpd/0.93/v0.84-503-g423c35a) with (AES128-GCM-SHA256 encrypted) ESMTPS; Wed, 04 May 2016 14:30:21 +0000 Received: from [216.39.60.175] by nm22.access.bullet.mail.gq1.yahoo.com with NNFMP; 04 May 2016 14:30:18 -0000 Received: from [67.195.23.145] by tm11.access.bullet.mail.gq1.yahoo.com with NNFMP; 04 May 2016 14:30:18 -0000 Received: from [127.0.0.1] by smtp117.sbc.mail.gq1.yahoo.com with NNFMP; 04 May 2016 14:30:18 -0000 X-Yahoo-SMTP: mjD.OBqswBAPbVUxYJaYPvc61jLEnpq8VnBwJGdbEJOPA9xw Subject: Re: Deterministic builds To: cygwin@cygwin.com References: From: Greg Chicares Message-ID: <572A0778.3080509@sbcglobal.net> Date: Wed, 04 May 2016 14:30:00 -0000 User-Agent: Mozilla/5.0 (X11; Linux x86_64; rv:38.0) Gecko/20100101 Icedove/38.6.0 MIME-Version: 1.0 In-Reply-To: Content-Type: text/plain; charset=utf-8 Content-Transfer-Encoding: 7bit X-IsSubscribed: yes X-SW-Source: 2016-05/txt/msg00046.txt.bz2 On 2016-05-04 13:38, Ken Brown wrote: > Is it possible to build an executable on Cygwin so that subsequent > builds (with no change in source) produce identical results? Currently, > the timestamp embedded in executables prevents this. (I don't know if > that's the only obstacle.) '-fno-guess-branch-probability' removes one potential obstacle: https://lists.debian.org/debian-devel/2005/02/msg01154.html I don't know if there are other obstacles than these. -- Problem reports: http://cygwin.com/problems.html FAQ: http://cygwin.com/faq/ Documentation: http://cygwin.com/docs.html Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple