I'm fairly new to using Boost Python and running into some funkiness. When I try to pass back a simple int from C++ to Python, I get a Segmentation Fault. Here's the C++: #include <iostream> #include int helloworld() { return 10; } BOOST_PYTHON_MODULE(test_boost) { boost::python::def("helloworld", helloworld); } and here's the Python: import test_boost print(test_boost.helloworld()) The strange thing is it works fine with char const* types. Does anyone know what could cause this? Compiled on Mac OS X 10.10.5 with Anaconda Python with the following: g++ -g -shared -fPIC -I/Users/bradneuberg/anaconda/include/python2.7 test_boost.cpp -lpython2.7 -lboost_python -o test_boost.so Best, Brad Neuberg