I've got a linking issue with this lib on Linux. If I don't specify -lboost_program_options, I naturally get several pages of missing symbols. No surprise there. However, if I /do/ specify it, I still get /some/!? ________________________________________________________________________________ Creating bin/baker g++ obj/mesh.o obj/dnHumpBaker.o -L/hosts/norwich/user_data/ritz/usr/local/3delight-6.5.24/Linux-x86_64/lib -l3delight -lboost_program_options -o bin/baker obj/dnHumpBaker.o(.text+0xb84): In function `main': dnHumpBaker.cpp: undefined reference to `boost::program_options::options_description::options_description(std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&, unsigned int)' obj/dnHumpBaker.o(.gnu.linkonce.t._ZN5boost15program_options25basic_command_line_parserIcE7optionsERKNS0_19options_descriptionE[boost::program_options::basic_command_line_parser<char>::options(boost::program_options::options_description const&)]+0x15): In function `boost::program_options::basic_command_line_parser<char>::options(boost::program_options::options_description const&)': dnHumpBaker.cpp: undefined reference to `boost::program_options::detail::cmdline::set_options_description(boost::program_options::options_description const&)' obj/dnHumpBaker.o(.gnu.linkonce.t._ZN5boost15program_options25basic_command_line_parserIcE10positionalERKNS0_30positional_options_descriptionE[boost::program_options::basic_command_line_parser<char>::positional(boost::program_options::positional_options_description const&)]+0x5): In function `boost::program_options::basic_command_line_parser<char>::positional(boost::program_options::positional_options_description const&)': dnHumpBaker.cpp: undefined reference to `boost::program_options::detail::cmdline::set_positional_options(boost::program_options::positional_options_description const&)' obj/dnHumpBaker.o(.gnu.linkonce.t._ZN5boost15program_options25basic_command_line_parserIcE3runEv[boost::program_options::basic_command_line_parser<char>::run()]+0x40): In function `boost::program_options::basic_command_line_parser<char>::run()': dnHumpBaker.cpp: undefined reference to `boost::program_options::detail::cmdline::run()' obj/dnHumpBaker.o(.gnu.linkonce.t._ZN5boost15program_options25basic_command_line_parserIcEC1EiPPc[boost::program_options::basic_command_line_parser<char>::basic_command_line_parser(int, char**)]+0x3e): In function `boost::program_options::basic_command_line_parser<char>::basic_command_line_parser(int, char**)': dnHumpBaker.cpp: undefined reference to `boost::program_options::detail::cmdline::cmdline(std::vector<std::basic_string<char, std::char_traits<char>, std::allocator<char> >, std::allocator<std::basic_string<char, std::char_traits<char>, std::allocator<char> > > > const&)' collect2: ld returned 1 exit status make: *** [baker] Error 1