From owner-freebsd-current@FreeBSD.ORG  Wed Jan  4 22:41:25 2012
Return-Path: <owner-freebsd-current@FreeBSD.ORG>
Delivered-To: current@freebsd.org
Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34])
	by hub.freebsd.org (Postfix) with ESMTP id 70BA6106567A
	for <current@freebsd.org>; Wed,  4 Jan 2012 22:41:25 +0000 (UTC)
	(envelope-from luigi@onelab2.iet.unipi.it)
Received: from onelab2.iet.unipi.it (onelab2.iet.unipi.it [131.114.59.238])
	by mx1.freebsd.org (Postfix) with ESMTP id 32CFB8FC1B
	for <current@freebsd.org>; Wed,  4 Jan 2012 22:41:25 +0000 (UTC)
Received: by onelab2.iet.unipi.it (Postfix, from userid 275)
	id EF2E77300A; Wed,  4 Jan 2012 23:58:15 +0100 (CET)
Date: Wed, 4 Jan 2012 23:58:15 +0100
From: Luigi Rizzo <rizzo@iet.unipi.it>
To: Garrett Cooper <yanegomi@gmail.com>
Message-ID: <20120104225815.GA73964@onelab2.iet.unipi.it>
References: <20120104222315.GA73613@onelab2.iet.unipi.it>
	<CAGH67wR0jwr9vtJWNCB=-947TSAxciEf971m4keNNkwxvO9SeQ@mail.gmail.com>
	<20120104222955.GA73868@onelab2.iet.unipi.it>
	<CAGH67wR8WCimVp8tn4MY=7=BWUubjma1Cjcsj0+qEqo4StK_wg@mail.gmail.com>
Mime-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Disposition: inline
In-Reply-To: <CAGH67wR8WCimVp8tn4MY=7=BWUubjma1Cjcsj0+qEqo4StK_wg@mail.gmail.com>
User-Agent: Mutt/1.4.2.3i
Cc: current@freebsd.org
Subject: Re: add 'ldd' to cross-tools ?
X-BeenThere: freebsd-current@freebsd.org
X-Mailman-Version: 2.1.5
Precedence: list
List-Id: Discussions about the use of FreeBSD-current
	<freebsd-current.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>, 
	<mailto:freebsd-current-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-current>
List-Post: <mailto:freebsd-current@freebsd.org>
List-Help: <mailto:freebsd-current-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-current>,
	<mailto:freebsd-current-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Wed, 04 Jan 2012 22:41:25 -0000

On Wed, Jan 04, 2012 at 02:30:27PM -0800, Garrett Cooper wrote:
> On Wed, Jan 4, 2012 at 2:29 PM, Luigi Rizzo <rizzo@iet.unipi.it> wrote:
...
> >> $ objdump -x `which tar` | awk '$1 == "NEEDED" { print $2 }'
> >> libarchive.so.5
> >> libbz2.so.4
> >> libz.so.6
> >> liblzma.so.5
> >> libbsdxml.so.4
> >> libcrypto.so.6
> >> libc.so.7
> >
> > wonderful, thanks!
> 
>     Np! The only gap with both of these tools is that you have to
> watch out for dl_open'ed binaries as they won't show up in ldd/objdump
> -x. If I could figure out how to detect these with a command line
> tool, I would be set for life :).

and the other thing, i just realized, is that once you locate
the libraries you should run objdump recursively to find
out further dependencies. Perhaps ldd sorts this out by itself ?

cheers
luigi