I've just started this morning with boost::python and have been struggling all day to get the basic http://www.boost.org/doc/libs/1_35_0/libs/python/doc/tutorial/doc/html/pytho... 'exposing classes' doc/tutorial: to link correctly under gcc 4.1.2. I would greatly appreciate any help as I'm sure it's probably something simple and I'm pretty much at a loss at the moment. So the source file compiles and the shared object appears to link ok however when I try and import the module, python reports the following missing symbol: ImportError: /test/BoostPython/hello.so: undefined symbol: _ZN5boost6python9converter8registry6insertEPFPvP7_objectEPFvS5_PNS1_30rvalue_from_python_stage1_dataEENS0_9type_infoE de-mangled courtesy of c++filt: boost::python::converter::registry::insert(void* (*)(_object*), void (*)(_object*, boost::python::converter::rvalue_from_python_stage1_data*), boost::python::type_info) Indeed a search through the boost.python headers yields no such function prototype. Nor does searching the symbols defined in libboost_python-gcc41-mt.so. The closest match I can find in libboost_python-gcc41-mt.so is: boost::python::converter::registry::insert(void* (*)(_object*), void (*)(_object*, boost::python::converter::rvalue_from_python_stage1_data*), boost::python::type_info, _typeobject const* (*)()) which appears to match the following function in python/converter/registry.hpp: // Insert an rvalue from_python converter BOOST_PYTHON_DECL void insert( convertible_function , constructor_function , type_info , PyTypeObject const* (*expected_pytype)() = 0 ); Beyond that I'm pretty much stuck. Thanks in advance to anyone who can help me out! antony /*------------------- hello.cpp -------------------*/ #include <string> struct World { void set(std::string msg) { this->msg = msg; } std::string greet() { return msg; } std::string msg; }; #include using namespace boost::python; BOOST_PYTHON_MODULE(hello) { class_<World>("World") .def("greet", &World::greet) .def("set", &World::set) ; } /*-----------------------------------------------------------*/ g++ -c -g -Wall -fPIC -pipe -DBOOST_PYTHON_MAX_ARITY=20 -I. -I/usr/local/include -I/usr/local/include/python2.5 hello.cpp g++ -shared -o hello.so hello.o -L/usr/local/lib -lpython2.5 -lboost_python-gcc41-mt -- View this message in context: http://www.nabble.com/boost.python---undefined-symbol-error-tp19054023p19054... Sent from the Boost - Users mailing list archive at Nabble.com.