From owner-freebsd-questions@FreeBSD.ORG  Thu Oct 27 19:20:35 2005
Return-Path: <owner-freebsd-questions@FreeBSD.ORG>
X-Original-To: freebsd-questions@freebsd.org
Delivered-To: freebsd-questions@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id 3681616A41F
	for <freebsd-questions@freebsd.org>;
	Thu, 27 Oct 2005 19:20:35 +0000 (GMT)
	(envelope-from dpkirchner@gmail.com)
Received: from xproxy.gmail.com (xproxy.gmail.com [66.249.82.202])
	by mx1.FreeBSD.org (Postfix) with ESMTP id 4C97D43D48
	for <freebsd-questions@freebsd.org>;
	Thu, 27 Oct 2005 19:20:24 +0000 (GMT)
	(envelope-from dpkirchner@gmail.com)
Received: by xproxy.gmail.com with SMTP id t5so56027wxc
	for <freebsd-questions@freebsd.org>;
	Thu, 27 Oct 2005 12:20:16 -0700 (PDT)
DomainKey-Signature: a=rsa-sha1; q=dns; c=nofws; s=beta; d=gmail.com;
	h=received:message-id:date:from:sender:to:subject:in-reply-to:mime-version:content-type:content-transfer-encoding:content-disposition:references;
	b=MdZxrehRM2xTC7cpmJ54axgaN9YefiHMG8bK6PU9c5kxWTKXoZew6eZFMDP+dsnIz4c5XgoaIiogySJYqlv3o8YOWMqd0Cb2KNk/sm/Yhcgz0SLiu+6ms86Ly49xXlc0Dq0J9ES+KZ1vLI3AY/GyTRWd71ESlGnb5gmrCWJPYgA=
Received: by 10.70.105.5 with SMTP id d5mr1421060wxc;
	Thu, 27 Oct 2005 12:20:16 -0700 (PDT)
Received: by 10.70.104.18 with HTTP; Thu, 27 Oct 2005 12:20:16 -0700 (PDT)
Message-ID: <35c231bf0510271220i2fb3de62g55a80f3d06f03355@mail.gmail.com>
Date: Thu, 27 Oct 2005 12:20:16 -0700
From: David Kirchner <dpk@dpk.net>
Sender: dpkirchner@gmail.com
To: freebsd-questions@freebsd.org
In-Reply-To: <20051027185157.GV29508@localdomain>
MIME-Version: 1.0
Content-Type: text/plain; charset=ISO-8859-1
Content-Transfer-Encoding: quoted-printable
Content-Disposition: inline
References: <cb5206420510251524r32ddd9adx7d4fdce8f82a85be@mail.gmail.com>
	<17247.39311.203645.265116@jerusalem.litteratus.org>
	<cb5206420510260818p664df038g39a1035c747ac315@mail.gmail.com>
	<200510262115.48144.krinklyfig@comcast.net>
	<cb5206420510270116k27ad6e13r5dd17dbc7323c01f@mail.gmail.com>
	<4360DB59.7010900@ywave.com> <20051027154408.GS29508@localdomain>
	<43611E22.5030408@ywave.com> <20051027185157.GV29508@localdomain>
Subject: Re: Which version of FreeBSD a binary was compiled for?
X-BeenThere: freebsd-questions@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: User questions <freebsd-questions.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-questions>
List-Post: <mailto:freebsd-questions@freebsd.org>
List-Help: <mailto:freebsd-questions-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-questions>, 
	<mailto:freebsd-questions-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Thu, 27 Oct 2005 19:20:35 -0000

On 10/27/05, Will Maier <willmaier@ml1.net> wrote:
> Must be -- some flag produces unique bits in the executables. I'm a
> little surprised there isn't (AFAICT) anything descriptive in
> file(1)'s manpage or /u/s/mi/magic that would explain the
> discrepancy. Didn't see anything in quick looks through gcc(1) or
> make(1), either.
>
> Weird.

It doesn't look like it's done in the magic file. Rather, it's
something built in to file itself. Check out around line 400 of
'readelf.c'.

This doesn't explain how it gets in to the binaries built, though.