Hi,<br><br>When i run my C++ program which is using� boost library, i am getting these errors<br><br>main.o: In function `boost::program_options::<div id=":1jf" class="ii gt">variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const':<br> /usr/local/include/boost-1_35/boost/program_options/variables_map.hpp:161: undefined reference to `boost::program_options::abstract_variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const'<br> /usr/local/include/boost-1_35/boost/program_options/variables_map.hpp:161: undefined reference to `boost::program_options::abstract_variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const'<br> /usr/local/include/boost-1_35/boost/program_options/variables_map.hpp:161: undefined reference to `boost::program_options::abstract_variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const'<br> /usr/local/include/boost-1_35/boost/program_options/variables_map.hpp:161: undefined reference to `boost::program_options::abstract_variables_map::operator[](std::basic_string<char, std::char_traits<char>, std::allocator<char> > const&) const<br> <br><br>When i try to link the program library ( -l<span>boost</span>_<span>program</span>_<span>options</span>-mt ) it is giving errors<br> /usr/bin/ld: cannot find -lboost_program_options-mt<br>collect2: ld returned 1 exit status<br><br>I have checked these using� ls /usr/lib|grep boost� command<br>Output is <br><br>libboost_date_time-mt.so.1.34.<div id=":11e" class="ii gt"> 1<br>libboost_date_time-mt.so.3<br> libboost_date_time.so.1.34.1<br>libboost_date_time.so.3<br>libboost_filesystem-mt.so.1.34.1<br>libboost_filesystem-mt.so.3<br>libboost_filesystem.so.1.34.1<br>libboost_filesystem.so.3<br>libboost_graph-mt.so.1.34.1<br>libboost_graph-mt.so.3<br> libboost_graph.so.1.34.1<br>libboost_graph.so.3<br>libboost_iostreams-mt.so.1.34.1<br>libboost_iostreams-mt.so.3<br>libboost_iostreams.so.1.34.1<br>libboost_iostreams.so.3<br>libboost_prg_exec_monitor-mt.so.1.34.1<br>libboost_prg_exec_monitor-mt.so.3<br> libboost_prg_exec_monitor.so.1.34.1<br>libboost_prg_exec_monitor.so.3<br>libboost_program_options-mt.so.1.34.1<br>libboost_program_options-mt.so.3<br>libboost_program_options.so.1.34.1<br>libboost_program_options.so.3<br> libboost_python-mt.so.1.34.1<br>libboost_python-mt.so.3<br>libboost_python.so.1.34.1<br>libboost_python.so.3<br>libboost_regex-mt.so.1.34.1<br>libboost_regex-mt.so.3<br>libboost_regex.so.1.34.1<br>libboost_regex.so.3<br> libboost_serialization-mt.so.1.34.1<br> libboost_serialization-mt.so.3<br>libboost_serialization.so.1.34.1<br>libboost_serialization.so.3<br>libboost_signals-mt.so.1.34.1<br>libboost_signals-mt.so.3<br>libboost_signals.so.1.34.1<br>libboost_signals.so.3<br>libboost_thread-mt.so.1.34.1<br> libboost_thread-mt.so.3<br>libboost_unit_test_framework-mt.so.1.34.1<br>libboost_unit_test_framework-mt.so.3<br>libboost_unit_test_framework.so.1.34.1<br>libboost_unit_test_framework.so.3<br>libboost_wave-mt.so.1.34.1<br> libboost_wave-mt.so.3<br>libboost_wave.so.1.34.1<br>libboost_wave.so.3<br>libboost_wserialization-mt.so.1.34.1<br>libboost_wserialization-mt.so.3<br>libboost_wserialization.so.1.34.1<br>libboost_wserialization.so.3<br><br> <br><br><br>My LD_LIBRARY_PATH contains<br>/usr/local/lib�� /usr/lib� /usr/local/include/boost-1_35/boost</div><br> <br><br><br>Please help to solve this problem.<br>Please...<br><br></div><br clear="all"><br>-- <br>Thanks & Regards<br><br>Nagendar<br>