Date: Sun, 06 Mar 2005 20:15:26 -0500 From: Chuck Swiger <cswiger@mac.com> To: Jonathon McKitrick <jcm@FreeBSD-uk.eu.org> Cc: freebsd-questions@freebsd.org Subject: Re: Which lib for pthreads? Message-ID: <422BAB2E.9060703@mac.com> In-Reply-To: <20050306215500.GA5571@dogma.freebsd-uk.eu.org> References: <20050305183226.GA47472@dogma.freebsd-uk.eu.org> <20050306011827.GE2272@dan.emsphone.com> <20050306213249.GA4624@dogma.freebsd-uk.eu.org> <20050306213955.GA11496@gothmog.gr> <20050306215500.GA5571@dogma.freebsd-uk.eu.org>
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Jonathon McKitrick wrote: > 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 Um. If you are compiling C++ code into an object file, you ought to use c++ and not cc when linking, too. > ---> 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> Also, you may not have relinked 'app'. Do an ldd on app and see whether it has a dependency on libc_r? Try relinking app using -pthread against a libplugina.so compiled with -pthread... -- -Chuck
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