Date: Sun, 6 Mar 2005 21:55:00 +0000 From: Jonathon McKitrick <jcm@FreeBSD-uk.eu.org> To: Giorgos Keramidas <keramida@ceid.upatras.gr> Cc: freebsd-questions@freebsd.org Subject: Re: Which lib for pthreads? Message-ID: <20050306215500.GA5571@dogma.freebsd-uk.eu.org> In-Reply-To: <20050306213955.GA11496@gothmog.gr> References: <20050305183226.GA47472@dogma.freebsd-uk.eu.org> <20050306011827.GE2272@dan.emsphone.com> <20050306213249.GA4624@dogma.freebsd-uk.eu.org> <20050306213955.GA11496@gothmog.gr>
next in thread | previous in thread | raw e-mail | index | archive | help
On Sun, Mar 06, 2005 at 11:39:55PM +0200, Giorgos Keramidas wrote: : On 2005-03-06 21:32, Jonathon McKitrick <jcm@FreeBSD-uk.eu.org> wrote: : >On Sat, Mar 05, 2005 at 07:18:31PM -0600, Dan Nelson wrote: : >:In the last episode (Mar 05), Jonathon McKitrick said: : >:> Linux lets me use -pthread, but under BSD I get 'undefined symbol : >:> "pthread_mutex_lock."' : >:> : >:> What's the correct linker syntax for pthreads? : >: : >: That would be it. It should work on 4.* and 5.*. : > : > I found -lc_r does the trick. Not what I was expecting. : : -lpthread should work too. Hmmmm... jcm@worker:...cvs/tcontainer/libplugina> make install cc -O -pipe -Wall -g -I.. -I../include -shared -fPIC -c plugina.c c++ -O -pipe -Wall -g -I.. -I../include -shared -fPIC -c wrapper.cpp c++ -O -pipe -Wall -g -I.. -I../include -shared -fPIC -c myclass.cpp cc -O -pipe -Wall -g -I.. -I../include -shared -fPIC -c threads.c cc -O -pipe -Wall -g -I.. -I../include -shared -fPIC -lpthread -lstdc++ -g -Wl,-soname,libplugina.so.0 -o libplugina.so.0.0 plugina.o wrapper.o myclass.o threads.o /usr/libexec/elf/ld: cannot find -lpthread *** Error code 1 Stop in /usr/home/jcm/cvs/tcontainer/libplugina. jcm@worker:...cvs/tcontainer/libplugina> What about -pthread? jcm@worker:...cvs/tcontainer/libplugina> make install cc -O -pipe -Wall -g -I.. -I../include -shared -fPIC -c plugina.c c++ -O -pipe -Wall -g -I.. -I../include -shared -fPIC -c wrapper.cpp c++ -O -pipe -Wall -g -I.. -I../include -shared -fPIC -c myclass.cpp cc -O -pipe -Wall -g -I.. -I../include -shared -fPIC -c threads.c cc -O -pipe -Wall -g -I.. -I../include -shared -fPIC -pthread -lstdc++ -g -Wl,-soname,libplugina.so.0 -o libplugina.so.0.0 plugina.o wrapper.o myclass.o threads.o ---> Installing libplugina.so to /home/jcm/lib install -m 644 libplugina.so.0.0 /home/jcm/lib ln -sf libplugina.so.0.0 /home/jcm/lib/libplugina.so.0 ln -sf libplugina.so.0 /home/jcm/lib/libplugina.so jcm@worker:...cvs/tcontainer/libplugina> app /usr/libexec/ld-elf.so.1: /home/jcm/lib/libplugina.so: Undefined symbol "pthread_create" jcm@worker:...cvs/tcontainer/libplugina> Jonathon McKitrick -- My other computer is your Windows box.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?20050306215500.GA5571>