From owner-freebsd-hackers@FreeBSD.ORG  Sun Aug 31 12:13:08 2003
Return-Path: <owner-freebsd-hackers@FreeBSD.ORG>
Delivered-To: freebsd-hackers@freebsd.org
Received: from mx1.FreeBSD.org (mx1.freebsd.org [216.136.204.125])
	by hub.freebsd.org (Postfix) with ESMTP id DF12C16A4BF
	for <freebsd-hackers@freebsd.org>;
	Sun, 31 Aug 2003 12:13:07 -0700 (PDT)
Received: from planet.alastria.net (planet.alastria.net [66.111.42.100])
	by mx1.FreeBSD.org (Postfix) with ESMTP id EB39343FE1
	for <freebsd-hackers@freebsd.org>;
	Sun, 31 Aug 2003 12:13:06 -0700 (PDT)
	(envelope-from peter@alastria.net)
Received: from CAESIUM.hilbre.org.uk (m7-mp1.n05.man.dial.ntli.net
	[217.137.176.7] (may be forged))
	by planet.alastria.net (8.12.8p1/8.12.8) with SMTP id h7VJD1cF049965
	for <freebsd-hackers@freebsd.org>;
	Sun, 31 Aug 2003 20:13:02 +0100 (BST)
	(envelope-from peter@alastria.net)
From: Peter Wood <peter@alastria.net>
To: freebsd-hackers@freebsd.org
Date: Sun, 31 Aug 2003 20:13:03 +0100
Organization: Alastria Networks
Message-ID: <kkh4lv8pkgfn2so4ou9i9t3cvc0cimpcig@4ax.com>
X-Mailer: Forte Agent 1.91/32.564
MIME-Version: 1.0
Content-Type: text/plain; charset=us-ascii
Content-Transfer-Encoding: quoted-printable
Subject: Linking with -shared and -pthread...
X-BeenThere: freebsd-hackers@freebsd.org
X-Mailman-Version: 2.1.1
Precedence: list
List-Id: Technical Discussions relating to FreeBSD
	<freebsd-hackers.freebsd.org>
List-Unsubscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=unsubscribe>
List-Archive: <http://lists.freebsd.org/pipermail/freebsd-hackers>
List-Post: <mailto:freebsd-hackers@freebsd.org>
List-Help: <mailto:freebsd-hackers-request@freebsd.org?subject=help>
List-Subscribe: <http://lists.freebsd.org/mailman/listinfo/freebsd-hackers>,
	<mailto:freebsd-hackers-request@freebsd.org?subject=subscribe>
X-List-Received-Date: Sun, 31 Aug 2003 19:13:08 -0000

Good Evening,

I've been looking at writing a program that uses both shared libraries
(dlopen/dlclose) and POSIX threads. I however haven't had any success in =
my
simple tests.

After doing some research via google I found that due to -shared pthreads
wasn't linked into the shared library, fair enough, it's logical.

My question is, is it possible to write programs that use pthreads in =
their
shared libraries on FreeBSD.

=46or compiling the base program (that is the program that loads the =
shared
libraries) I've been using:

gcc -export-dynamic -pthread master.c -o master

And for each of the shared libaries I've been using:

gcc -shared -pthread slave.c -o slave.so

I had intended to use some form of message queue using a pthread =
condition.=20

The sample C files I've been using can be located at:
http://planet.alastria.net/~peter/hackers/master.c
http://planet.alastria.net/~peter/hackers/slave.c

Any light would be greatly apreciated,

Cheers,

Peter.
--=20
Peter Wood <peter@alastria.net> :: Tel +44 7974 799440