[Boost-users] compile asio against static boost libs

Hi all! I would like to compile my project against static libraries If I compile my project in following manner: c++ -I/usr/local/include/boost/1.49.0/ -c -o azio.o azio.cpp c++ -L/usr/local/lib64/boost/1.49.0/ azio.o -lboost_system -o bin/azio It is OK. But if I use static libraries: c++ -I/usr/local/include/boost/1.49.0/ -c -o azio.o azio.cpp c++ -L/usr/local/lib64/boost/1.49.0/ azio.o /usr/local/lib64/boost/1.49.0/libboost_system.a -o bin/azio I have got error: azio.o: In function `boost::asio::detail::posix_tss_ptr_create(unsigned int&)': azio.cpp:(.text._ZN5boost4asio6detail20posix_tss_ptr_createERj[boost::asio::detail::posix_tss_ptr_create(unsigned int&)]+0x19): undefined reference to `pthread_key_create' azio.o: In function `boost::asio::detail::posix_thread::~posix_thread()': ........ ........ boost::asio::detail::task_io_service::thread_info>::context>::operator=(boost::asio::detail::call_stack::context*)]+0x20): undefined reference to `pthread_setspecific' collect2: ld returned 1 exit status I used strings to know where is function pthread_key_create. I found in libboost_thread.so. Next my step was: c++ -L/usr/local/lib64/boost/1.49.0/ azio.o /usr/local/lib64/boost/1.49.0/libboost_system.a /usr/local/lib64/boost/1.49.0/libboost_thread.a -o bin/azio I've try out to mix up places libraries and object file c++ .. azio.o libboost_system.a libboost_thread.a -o bin/azio c++ .. libboost_system.a libboost_thread.a azio.o -o bin/azio c++ .. libboost_thread.a azio.o libboost_system.a -o bin/azio But error is still. Thanx, Sergiy