Sorry for the dumb question... Just installed boost following the instructions on boost.org, and I can't find the smart_ptr library. I downloaded the 1.32 .bz file, and bjam, and installed on Linux/RHEL4. I've now got 189 boost libraries in /usr/local/lib, and 32 in /usr/lib. However, the only base libraries seem to be date_time, filesystem, prg_exec_monitor, program_options, python, regex, serialisation, signals, test_exec_monitor, thread, unit_test_framework, and wserialisation, some of which aren't even listed on the libraries page at boost.org. Where's smart_ptr? None of these libraries appear to have it. The smart_ptr headers are in /usr/local/include/boost-1_32/boost, as expected (but why 2 levels down? Surely I'm not expected to #include <boost-1_32/boost/xx.hpp??) Cheers.