Created attachment 24396 [details] The attached file re-produces the probem that I have reported above Hi, The attached program when compiled using gcc 4.4.3 produces the following output and never returns : ... ===> Fpga: 865, Thread: 6 ===> Fpga: 866, Thread: 6 ===> Fpga: 867, Thread: 6 ===> Fpga: 868, Thread: 6 ===> Fpga: 869, Thread: 6 ===> Fpga: 870, Thread: 6 ===> Fpga: 871, Thread: 6 ===> Fpga: 872, Thread: 6 ===> Fpga: 873, Thread: 6 ===> Fpga: 874, Thread: 6 I have to kill the process to make it exit. The same program when compiled using gcc 4.3.3 and run on the same machine works fine and produces the correct output. I compile and run the program on a redhat 4 linux machine with the following specs: mawhp2:/home/parvizf/tmp=> uname -a Linux mawhp2 2.6.9-89.ELsmp #1 SMP Mon Apr 20 10:33:05 EDT 2009 x86_64 x86_64 x86_64 GNU/Linux mawhp2:/home/parvizf/tmp=> cat /etc/redhat-release Red Hat Enterprise Linux WS release 4 (Nahant Update 8) Thanks in advance for your help. -Parviz
Can't reproduce, tried gcc 4.4.5, 4.6 and 4.7, both -m32 and -m64, gcc and g++, and various options.
-Parviz(In reply to comment #1) > Can't reproduce, tried gcc 4.4.5, 4.6 and 4.7, both -m32 and -m64, gcc and g++, > and various options. The compile/link option -static seems to be significant in this case. The executable built with the following command : /tools/linux64/gcc-4.4.3/bin/g++ -o omp -g -static -fopenmp -lgomp -lpthread -I/tools/linux64/gcc-4.4.3/include -L/usr/lib64 -L/tools/linux64/gcc-4.4.3/lib64 omp.cc Do not work. When I remove the -static option, it does work. Any ideas?
See http://www.akkadia.org/drepper/no_static_linking.html If you still for whatever weird reason insist to link statically, for NPTL you need to -Wl,--whole-archive -lpthread -Wl,--no-whole-archive because if only some objects from libpthread are linked in, it can misbehave in various ways. In RHEL6 libpthread.a contains just one object ld -r linked together the whole normal libpthread.a contents, but in upstream glibc as well as older RHEL versions (no idea about other distros) you need to link as mentioned above.