GNU bug report logs - #12319
libltdl does not skip bad libs

Message received at submit <at> debbugs.gnu.org:

Received: (at submit) by debbugs.gnu.org; 31 Aug 2012 16:25:28 +0000
From debbugs-submit-bounces <at> debbugs.gnu.org Fri Aug 31 12:25:28 2012
Received: from localhost ([127.0.0.1]:59725 helo=debbugs.gnu.org)
	by debbugs.gnu.org with esmtp (Exim 4.72)
	(envelope-from <debbugs-submit-bounces <at> debbugs.gnu.org>)
	id 1T7U2B-0005N9-GM
	for submit <at> debbugs.gnu.org; Fri, 31 Aug 2012 12:25:27 -0400
Received: from eggs.gnu.org ([208.118.235.92]:52758)
	by debbugs.gnu.org with esmtp (Exim 4.72)
	(envelope-from <ossman@HIDDEN>) id 1T7PSf-0007FI-JL
	for submit <at> debbugs.gnu.org; Fri, 31 Aug 2012 07:32:31 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <ossman@HIDDEN>) id 1T7PRO-0004Tb-J0
	for submit <at> debbugs.gnu.org; Fri, 31 Aug 2012 07:31:14 -0400
X-Spam-Checker-Version: SpamAssassin 3.3.2 (2011-06-06) on eggs.gnu.org
X-Spam-Level: 
X-Spam-Status: No, score=-6.9 required=5.0 tests=BAYES_00,RCVD_IN_DNSWL_HI
	autolearn=unavailable version=3.3.2
Received: from lists.gnu.org ([208.118.235.17]:51530)
	by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <ossman@HIDDEN>) id 1T7PRO-0004TX-Fj
	for submit <at> debbugs.gnu.org; Fri, 31 Aug 2012 07:31:10 -0400
Received: from eggs.gnu.org ([208.118.235.92]:34706)
	by lists.gnu.org with esmtp (Exim 4.71)
	(envelope-from <ossman@HIDDEN>) id 1T7PRI-0001xa-BK
	for bug-libtool@HIDDEN; Fri, 31 Aug 2012 07:31:10 -0400
Received: from Debian-exim by eggs.gnu.org with spam-scanned (Exim 4.71)
	(envelope-from <ossman@HIDDEN>) id 1T7PR8-0004Lk-Mt
	for bug-libtool@HIDDEN; Fri, 31 Aug 2012 07:31:04 -0400
Received: from saehrimnir.ossman.eu ([193.12.253.10]:52291
	helo=smtp-relay.ossman.eu) by eggs.gnu.org with esmtp (Exim 4.71)
	(envelope-from <ossman@HIDDEN>) id 1T7PR8-0004LS-Fx
	for bug-libtool@HIDDEN; Fri, 31 Aug 2012 07:30:54 -0400
Received: from smtp.ossman.eu (c-89-233-204-98.cust.bredband2.com
	[::ffff:89.233.204.98])
	(AUTH: PLAIN smtpproxy, TLS: TLSv1/SSLv3,256bits,AES256-SHA)
	by smtp-relay.ossman.eu with esmtp; Fri, 31 Aug 2012 13:30:51 +0200
	id 0039E022.5040A06B.000019DF
Received: from mjolnir.ossman.eu ([2001:16d8:ff07:2:21d:e0ff:fe88:be11])
	(AUTH: LOGIN drzeus, TLS: TLS1.1,128bits,RSA_AES_128_CBC_SHA1)
	by smtp.ossman.eu with ESMTPSA; Fri, 31 Aug 2012 13:30:50 +0200
	id 00000000000000B8.000000005040A06A.00001799
Date: Fri, 31 Aug 2012 13:30:46 +0200
From: Pierre Ossman <ossman@HIDDEN>
To: bug-libtool@HIDDEN
Subject: libltdl does not skip bad libs
Message-ID: <20120831133046.67b8464f@HIDDEN>
Organization: Cendio AB
X-Mailer: Claws Mail 3.8.0 (GTK+ 2.24.8; x86_64-redhat-linux-gnu)
Mime-Version: 1.0
Content-Type: multipart/signed; micalg=PGP-SHA256;
	protocol="application/pgp-signature";
	boundary="=_freyr.ossman.eu-6041-1346412650-0001-2"
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 2)
X-detected-operating-system: by eggs.gnu.org: GNU/Linux 2.6 (newer, 3)
X-Received-From: 208.118.235.17
X-Spam-Score: -6.9 (------)
X-Debbugs-Envelope-To: submit
X-Mailman-Approved-At: Fri, 31 Aug 2012 12:25:25 -0400
X-BeenThere: debbugs-submit <at> debbugs.gnu.org
X-Mailman-Version: 2.1.13
Precedence: list
List-Id: <debbugs-submit.debbugs.gnu.org>
List-Unsubscribe: <http://debbugs.gnu.org/cgi-bin/mailman/options/debbugs-submit>,
	<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=unsubscribe>
List-Archive: <http://debbugs.gnu.org/cgi-bin/mailman/private/debbugs-submit>
List-Post: <mailto:debbugs-submit <at> debbugs.gnu.org>
List-Help: <mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=help>
List-Subscribe: <http://debbugs.gnu.org/cgi-bin/mailman/listinfo/debbugs-submit>,
	<mailto:debbugs-submit-request <at> debbugs.gnu.org?subject=subscribe>
Sender: debbugs-submit-bounces <at> debbugs.gnu.org
Errors-To: debbugs-submit-bounces <at> debbugs.gnu.org
X-Spam-Score: -6.9 (------)

This is a MIME-formatted message.  If you see this text it means that your
E-mail software does not support MIME-formatted messages.

--=_freyr.ossman.eu-6041-1346412650-0001-2
Content-Type: text/plain; charset=US-ASCII
Content-Transfer-Encoding: quoted-printable

I've unfortunately stumbled upon a key difference in behaviour between
dlopen() and lt_dlopen(). When dlopen() encounters a bad library (e.g.
wrong arch), it will just continue on and find another library.
lt_dlopen() however, will stop on the first library which it can read.

This breaks libltdl applications horribly in multi-arch environments.
As LD_LIBRARY_PATH is not arch specific, having a universal one means
having one like:

	LD_LIBRARY_PATH=3D/usr/foo/lib32:/usr/foo/lib64

This works fine with dlopen(), but not with lt_dlopen().

The fix seems simple enough. In find_handle_callback(), change:

	*phandle =3D 0;

to:

	return 0;

Rgds
--=20
Pierre Ossman            OpenSource-based Thin Client Technology
System Developer         Telephone: +46-13-21 46 00
Cendio AB                Web: http://www.cendio.com

--=_freyr.ossman.eu-6041-1346412650-0001-2
Content-Type: application/pgp-signature; name="signature.asc"
Content-Transfer-Encoding: 7bit
Content-Disposition: attachment; filename=signature.asc

-----BEGIN PGP SIGNATURE-----
Version: GnuPG v2.0.18 (GNU/Linux)

iF4EAREIAAYFAlBAoGkACgkQopDLsoqlmELZWQD/YMMqn4WdFuuHOCiWyuJEPlqs
M41TMntwrfNWdzmrQq8A/R1mUfqMGskCWYCMkTcvwpRQE18pG+jUuZR9vEF7PV69
=DRtB
-----END PGP SIGNATURE-----

--=_freyr.ossman.eu-6041-1346412650-0001-2--