/boost-1.50.0-mgw/boost/program_options/detail/config_file.hpp:145: undefined reference to `boost::program_options::detail::common_config_file_iterator::common_config_file_iterator(std::set<std::string, std::less, std::allocatorstd::string > const&, bool)'
/boost-1.50.0-mgw/boost/program_options/detail/config_file.hpp:148: undefined reference to `boost::program_options::detail::common_config_file_iterator::get()'
/boost-1.50.0-mgw/boost/program_options/detail/config_file.hpp:145: undefined reference to `boost::program_options::detail::common_config_file_iterator::common_config_file_iterator(std::set<std::string, std::less, std::allocatorstd::string > const&, bool)'
/boost-1.50.0-mgw/boost/program_options/detail/config_file.hpp:148: undefined reference to `boost::program_options::detail::common_config_file_iterator::get()'