Hello, I run into following problems compiling a programm what uses boost::program_options under gcc version 3.4.2 / mingw: --------------------------------------------------------------------------------------------------------------------------- ++ -mthreads src/entity/EntityManager.o src/entity/TestJob.o lib/Sched.lib lib/Timer.lib /C/workspace-eclipse/ReflectiveMemory.Linux/lib/mingw/debug/libsw_rm.dll /mingw/lib/libwsock32.a ../../src/common/lib/libpthreadGC2.a /mingw/lib/libwinmm.a /C/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/lib/libboost_filesystem-mgw.lib /C/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/lib/boost_date_time-mgw.lib /C/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/lib/boost_program_options-mgw.lib -o bin/EntityManager.exe Info: resolving vtable for boost::program_options::variables_mapby linking to __imp___ZTVN5boost15program_options13variables_mapE (auto-import) Info: resolving vtable for boost::program_options::value_semantic_codecvt_helper<char>by linking to __imp___ZTVN5boost15program_options29value_semantic_codecvt_helperIcEE (auto-import) Info: resolving boost::program_options::arg by linking to __imp___ZN5boost15program_options3argE (auto-import) Info: resolving vtable for boost::program_options::validation_errorby linking to __imp___ZTVN5boost15program_options16validation_errorE (auto-import) src/entity/EntityManager.o: In function `basic_command_line_parser':c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:42: undefined reference to `boost::program_options::detail::cmdline::cmdline(std::vector<std::string, std::allocator<std::string> > const&)' src/entity/EntityManager.o:c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:49: undefined reference to `boost::program_options::detail::cmdline::set_options_description(boost::program_options::options_description const&)' src/entity/EntityManager.o:c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:67: undefined reference to `boost::program_options::detail::cmdline::style(int)' src/entity/EntityManager.o:c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:75: undefined reference to `boost::program_options::detail::cmdline::set_additional_parser(boost::function1<std::pair<std::string, std::string>, std::string const&, std::allocator<boost::function_base> >)' src/entity/EntityManager.o:c:/workspace-eclipse/libs/boost_1_33_1.mingw_precompiled/include/boost-1_33_1/boost/program_options/detail/parsers.hpp:102: undefined reference to `boost::program_options::detail::cmdline::run()' collect2: ld returned 1 exit status make[1]: *** [bin/EntityManager.exe] Error 1 make[1]: Leaving directory `/c/workspace-eclipse/SimulationEngine/mingw/debug' make: *** [Tests] Error 2 --------------------------------------------------------------------------------------------------------------------------- here is the fragment that causes that behavior: --------------------------------------------------------------------------------------------------------------------------- // Declare the supported options. po::options_description desc("Allowed options"); desc.add_options() ("help", "produce help message") ("client_id", po::value<int>(&mClientId), "set em's client id.") ("srv_ip", po::value<string>(&mSrvIp), "set SWRM server ip adress. Default is 127.0.0.1") ("srv_port", po::value<int>(&mSrvPort), "set SWRM server port number. Default is 8011") ; po::variables_map vm; // trouble starts with commenting in the following line(s): // po::store(po::parse_command_line(globalArgc, globalArgv, desc), // vm); // po::notify(vm); // // if (vm.count("help")) // { // cout << desc << "\n"; // exit(EXIT_SUCCESS); // } // // if (0 == mClientId) // { // cout << "No client_id set. Exiting...\n"; // exit(EXIT_FAILURE); // } // if( 2 > mClientId ) // { // cout << "Client_id has to be greater than 1." // << " 1 is reserved for SWRM server. Exiting...\n"; // exit(EXIT_FAILURE); // }else // { // cout << "client_id of this EM was set to " // << mClientId << "\n"; // } // // if (vm.count("srv_ip")) // { // cout << "SWRM server ip set to " << mSrvIp << "\n"; // }else // { // cout << "SWRM server ip set to " << mSrvIp << "\n"; // } // // if (vm.count("srv_port")) // { // cout << "SWRM server port set to " << mSrvPort << "\n"; // }else // { // cout << "SWRM server port set to " << mSrvPort << "\n"; // } --------------------------------------------------------------------------------------------------------------------------- All does compile fine under linux. And also the other boost libs I'm using (filesystem and date_time) behave well. What I'm doing wrong? Thank you in advance!