Mailing-List: contact cygwin-help AT cygwin DOT com; run by ezmlm List-Subscribe: List-Archive: List-Post: List-Help: , Sender: cygwin-owner AT cygwin DOT com Mail-Followup-To: cygwin AT cygwin DOT com Delivered-To: mailing list cygwin AT cygwin DOT com Message-ID: <8D861ADC5B8FD211B4100008C71EA7DA04F7140D@kjsdemucshrexc1.eu.pm.com> From: "Demmer, Thomas" To: "'Cygwin AT cygwin DOT com'" Subject: Re: Different executables of the same source Date: Tue, 10 Feb 2004 14:43:22 +0100 MIME-Version: 1.0 Content-Type: text/plain; charset="iso-8859-1" Content-Transfer-Encoding: 8bit X-MIME-Autoconverted: from quoted-printable to 8bit by delorie.com id i1AECX65005419 "Alex Vinokur" wrote: [...] >$ gcc foo.c -o x1.exe > >$ gcc foo.c -o x2.exe > >$ cmp x1.exe x2.exe >x1.exe x2.exe differ: char 137, line 2 > >Why are x1.exe and x2.exe different? Because the PE header has a field that contains the creation time. Due to this "feature" the MD5-sums of executables compiled on two different machines will hardly ever concide. I have no clue why this feature exists. Ciao Tom Best regards / Mit freundlichen Grüssen, Thomas Demmer Kraft Foods R&D Inc. Chocolate WW Process Development Tel.: +49 (0)89 62738-6302 Fax: +49 (0)89 62738-86302 Thought of the day By doing just a little every day, you can gradually let the task completely overwhelm you. -- Unsubscribe info: http://cygwin.com/ml/#unsubscribe-simple Problem reports: http://cygwin.com/problems.html Documentation: http://cygwin.com/docs.html FAQ: http://cygwin.com/faq/