From owner-freebsd-hackers@FreeBSD.ORG Tue Mar 31 21:46:55 2009 Return-Path: Delivered-To: freebsd-hackers@freebsd.org Received: from mx1.freebsd.org (mx1.freebsd.org [IPv6:2001:4f8:fff6::34]) by hub.freebsd.org (Postfix) with ESMTP id 059AB1065674 for ; Tue, 31 Mar 2009 21:46:55 +0000 (UTC) (envelope-from julian@elischer.org) Received: from outX.internet-mail-service.net (outx.internet-mail-service.net [216.240.47.247]) by mx1.freebsd.org (Postfix) with ESMTP id DC9B98FC13 for ; Tue, 31 Mar 2009 21:46:54 +0000 (UTC) (envelope-from julian@elischer.org) Received: from idiom.com (mx0.idiom.com [216.240.32.160]) by out.internet-mail-service.net (Postfix) with ESMTP id 2B02B28BD3; Tue, 31 Mar 2009 14:46:55 -0700 (PDT) X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e X-Client-Authorized: MaGic Cook1e Received: from julian-mac.elischer.org (home.elischer.org [216.240.48.38]) by idiom.com (Postfix) with ESMTP id 92FC12D6092; Tue, 31 Mar 2009 14:46:51 -0700 (PDT) Message-ID: <49D28F67.7010802@elischer.org> Date: Tue, 31 Mar 2009 14:47:19 -0700 From: Julian Elischer User-Agent: Thunderbird 2.0.0.21 (Macintosh/20090302) MIME-Version: 1.0 To: "Shaowei Wang (wsw)" References: <2e566b9e0903310239x15b53d1av2f45453cb35a8898@mail.gmail.com> In-Reply-To: <2e566b9e0903310239x15b53d1av2f45453cb35a8898@mail.gmail.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Cc: Srinivas Ganji , freebsd-hackers@freebsd.org Subject: Re: Is it possible to use the libthr.a file on a Redhat Linux? X-BeenThere: freebsd-hackers@freebsd.org X-Mailman-Version: 2.1.5 Precedence: list List-Id: Technical Discussions relating to FreeBSD List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Tue, 31 Mar 2009 21:46:55 -0000 Shaowei Wang (wsw) wrote: > On Tue, Mar 31, 2009 at 4:40 PM, Srinivas Ganji wrote: > >> Dear All, >> >> I have tried to use the libthr.a library for compiling an application which >> is working fine on Redhat system with libpthread library. However, I end up >> with the following errors. >> >> >> >> ../lib/linux/libthr.a(thr_sem.o): In function `_sem_init': >> >> thr_sem.c:(.text+0x100): undefined reference to `ksem_init' >> >> thr_sem.c:(.text+0x115): undefined reference to `ksem_destroy' >> >> ../lib/linux/libthr.a(thr_sem.o): In function `_sem_destroy': >> >> thr_sem.c:(.text+0x216): undefined reference to `ksem_destroy' >> >> ../lib/linux/libthr.a(thr_sem.o): In function `_sem_timedwait': >> >> thr_sem.c:(.text+0x2ad): undefined reference to `ksem_timedwait' >> >> ../lib/linux/libthr.a(thr_sem.o): In function `_sem_wait': >> >> .... >> >> .... >> >> .... >> >> >> >> collect2: ld returned 1 exit status >> >> make: *** [target] Error 1 >> >> >> >> So, I have also mentioned the libc.so.7(This is also a FreeBSD libc >> >> library) library in our application to remove the above undefined >> references. So, at that time I got the following errors. >> >> >> >> /usr/bin/ld: errno@@FBSD_1.0: TLS definition in /lib/libc.so.6 section >> .tbss >> mismatches non-TLS definition in ../lib/linux/libc.so section .bss >> >> /lib/libc.so.6: could not read symbols: Bad value >> >> >> >> Here, the lib/libc.so.6 is a Redhat libc library where as >> ../lib/linux/libc.so is a FreeBSD library (libc.so.7). >> >> >> >> My question is: Is it possible to use the FreeBSD libthr.a library on a >> Redhat Linux distribution? >> > > As I known, it's not possible unless you port the libthr to Linux system. > > Linux use clone() system call to implement thread library and FreeBSD use a > different way(KSE). no, KSE was an experimental system that was removed.. FreeBSD threads are created using the thr_create() call There is some siliarity to the way that libthr and linux make threads as they are both 1:1 models. > > >> >> >> Thanks in advance. >> >> >> >> With Regards, >> >> Srinivas G >> _______________________________________________ >> freebsd-hackers@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-hackers >> To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org" >> > _______________________________________________ > freebsd-hackers@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-hackers > To unsubscribe, send any mail to "freebsd-hackers-unsubscribe@freebsd.org"