I am trying to run the regression test on my new opteron duel core machine, and it won't compile: gcc-Link-action ../../../bin/boost/tools/regression/build/process_jam_log/gcc/release/process_jam_log ../../../bin/boost/tools/regression/build/process_jam_log/gcc/release/process_jam_log.o: In function `boost::system::system_error::what() const': process_jam_log.cpp:(.text._ZNK5boost6system12system_error4whatEv[boost::system::system_error::what() const]+0xb5): undefined reference to `boost::system::error_code::message() const' ../../../bin/boost/tools/regression/build/process_jam_log/gcc/release/process_jam_log.o: In function `boost::filesystem::basic_filesystem_error<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::what() const': process_jam_log.cpp:(.text._ZNK5boost10filesystem22basic_filesystem_errorINS0_10basic_pathISsNS0_11path_traitsEEEE4whatEv[boost::filesystem::basic_filesystem_error<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::what() const]+0xb5): undefined reference to `boost::system::error_code::message() const' collect2: ld returned 1 exit status gcc-Link-action ../../../bin/boost/tools/regression/build/compiler_status/gcc/release/compiler_status ../../../bin/boost/tools/regression/build/compiler_status/gcc/release/compiler_status.o: In function `boost::filesystem::basic_filesystem_error<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::what() const': compiler_status.cpp:(.text._ZNK5boost10filesystem22basic_filesystem_errorINS0_10basic_pathISsNS0_11path_traitsEEEE4whatEv[boost::filesystem::basic_filesystem_error<boost::filesystem::basic_path<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, boost::filesystem::path_traits> >::what() const]+0xad): undefined reference to `boost::system::error_code::message() const' ../../../bin/boost/tools/regression/build/compiler_status/gcc/release/compiler_status.o: In function `boost::system::system_error::what() const': compiler_status.cpp:(.text._ZNK5boost6system12system_error4whatEv[boost::system::system_error::what() const]+0xb5): undefined reference to `boost::system::error_code::message() const' collect2: ld returned 1 exit status Here is the full text of python regression.py --runner=LobsterAtBrazil --toolsets=gcc http://acumenconsultinginc.net/error.txt --------------------------------- Access over 1 million songs - Yahoo! Music Unlimited.