From mboxrd@z Thu Jan  1 00:00:00 1970
Received: from pigeon.gentoo.org ([208.92.234.80] helo=lists.gentoo.org)
	by finch.gentoo.org with esmtp (Exim 4.60)
	(envelope-from <gentoo-user+bounces-106543-garchives=archives.gentoo.org@lists.gentoo.org>)
	id 1NXzx7-0006HH-8a
	for garchives@archives.gentoo.org; Thu, 21 Jan 2010 16:32:13 +0000
Received: from pigeon.gentoo.org (localhost [127.0.0.1])
	by pigeon.gentoo.org (Postfix) with SMTP id C76B4E0730;
	Thu, 21 Jan 2010 16:31:37 +0000 (UTC)
Received: from mail-ew0-f215.google.com (mail-ew0-f215.google.com [209.85.219.215])
	by pigeon.gentoo.org (Postfix) with ESMTP id 5FA1BE0730
	for <gentoo-user@lists.gentoo.org>; Thu, 21 Jan 2010 16:31:37 +0000 (UTC)
Received: by ewy7 with SMTP id 7so159873ewy.10
        for <gentoo-user@lists.gentoo.org>; Thu, 21 Jan 2010 08:31:36 -0800 (PST)
DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed;
        d=gmail.com; s=gamma;
        h=domainkey-signature:mime-version:received:in-reply-to:references
         :date:message-id:subject:from:to:content-type;
        bh=JQAyN0bYefH7U/QIj83nOemWj0Qd179MFyj8ogmuv0g=;
        b=uUwc+wj60sTq4H4hH6qnE5nLsp4SdYVSSJspxqhKk9z9aFhpliDMlEkKFGfXUr6YO5
         Jg8LOFq4WX7PpzrGkK6a6hwaVMkqmybgohHdO5/Y+M1/IQCCngBL7COM1Dy2gsAL4Y4f
         oXkUcwqAsZc9VPbryeX1E9W/0g2JJHV3ibI8I=
DomainKey-Signature: a=rsa-sha1; c=nofws;
        d=gmail.com; s=gamma;
        h=mime-version:in-reply-to:references:date:message-id:subject:from:to
         :content-type;
        b=XoZ5oAp5n/XcCSVTQ9z69KWvJIozm/yI11zYGqUhh8cGkUbC6YOK/aIbWAaEDUuQNB
         QNDeIFtt7uCZKrfyiO252UNZsXL7W9UQTX9Wq/KbzRzURhdXuSl5XDBlSGrndWZeFHsS
         vGgM6JZSr+y+K80HrJb50tmFI2ZAx1UbDBO2E=
Precedence: bulk
List-Post: <mailto:gentoo-user@lists.gentoo.org>
List-Help: <mailto:gentoo-user+help@lists.gentoo.org>
List-Unsubscribe: <mailto:gentoo-user+unsubscribe@lists.gentoo.org>
List-Subscribe: <mailto:gentoo-user+subscribe@lists.gentoo.org>
List-Id: Gentoo Linux mail <gentoo-user.gentoo.org>
X-BeenThere: gentoo-user@lists.gentoo.org
Reply-to: gentoo-user@lists.gentoo.org
MIME-Version: 1.0
Received: by 10.213.100.131 with SMTP id y3mr1493379ebn.91.1264091494488; Thu, 
	21 Jan 2010 08:31:34 -0800 (PST)
In-Reply-To: <tkrat.96ade464d75d0932@igpm.rwth-aachen.de>
References: <tkrat.96ade464d75d0932@igpm.rwth-aachen.de>
Date: Thu, 21 Jan 2010 18:31:34 +0200
Message-ID: <fecdbac61001210831x5c2f9545l2fb6e4ef8a1abf56@mail.gmail.com>
Subject: Re: [gentoo-user] dependencies - one more mystery novel
From: "Arttu V." <arttuv69@gmail.com>
To: gentoo-user@lists.gentoo.org
Content-Type: text/plain; charset=ISO-8859-1
X-Archives-Salt: d5243ccf-283b-4fbe-9994-a701d817b0d6
X-Archives-Hash: eacd9ec28d9ddfb81b35fa580df8568f

On 1/21/10, Helmut Jarausch <jarausch@igpm.rwth-aachen.de> wrote:
> Upgrading to media-libs/jpeg-8
> poses a new level of difficulty (to me).
>
> I cannot use  emerge @preserved-rebuild since I still
> have kde-3 packages and still have problems with the
> kde-sunset overlay which I have to resolve lateron.
>
> Now, I try to find out which packages depend on jpeg-7.
> First idea
> revdep-rebuild -p -L /usr/lib64/libjpeg.so.7
>
> but this also finds packages which depend on
>  /usr/lib64/libjpeg.so.7 AND /usr/lib64/libjpeg.so.8
> probably because they depend on /usr/lib64/libjpeg.so.7
> only indirectly.
>
> But how to find out these intermediate libraries which depend
> on /usr/lib64/libjpeg.so.7 directly?

I don't know why you wouldn't want to fix the kde3 overlay part ASAP,
but here is a guesswork, which might dig you something useful:

ls /usr/lib64/*.so | xargs -r scanelf -BF%n | grep 'libjpeg\.so\.7' |
awk '{ print $2 }' | xargs -r qfile -qC | uniq

It doesn't understand, e.g., slots, nor is really optimized. For such,
we'd need a separate program, which we'd call ... umm, lemme think ...
is reverse-dependency-rebuilder good? ;)

-- 
Arttu V.