Hi, I am kind of really new to boost and to jam files. I have built bjam and then libboost_thread.so by executing bjam in the boost-1.30.2/libs/thread/build folder. But building the files in the boost-1.30.2/libs/thread/tutorial folder gives me the following error: ...found 649 targets... ...updating 11 targets... gcc-Link-action ../../../libs/thread/tutorial/bin/helloworld/gcc/debug/runtime-l ink-dynamic/threading-multi/helloworld Undefined first referenced symbol in file logic_error::logic_error(basic_string<char, string_char_traits<char>, __default_ alloc_template<true, 0> > const &)../../../libs/thread/build/bin/libboost_thread .so/gcc/debug/runtime-link-dynamic/shared-linkable-true/threading-multi/libboost _thread.so runtime_error::runtime_error(basic_string<char, string_char_traits<char>, __defa ult_alloc_template<true, 0> > const &)../../../libs/thread/build/bin/libboost_th read.so/gcc/debug/runtime-link-dynamic/shared-linkable-true/threading-multi/libb oost_thread.so ld: fatal: Symbol referencing errors. No output written to ../../../libs/thread/ tutorial/bin/helloworld/gcc/debug/runtime-link-dynamic/threading-multi/helloworl d collect2: ld returned 1 exit status Unable to understand this kindly help. Regards, Manu ___________________________________________________ Check-out GO.com GO get your free GO E-Mail account with expanded storage of 6 MB! http://mail.go.com