Hi, I get an error linking the example program days_alive to the shared library libboost_date_time. g++ -L/usr/lib -lboost_date_time -odays_alive days_alive.o days_alive.o(.gnu.linkonce.t._ZN5boost9date_time19month_str_to_ushortINS_9gregorian10greg_monthEEEtSs+0xec): In function `unsigned short boost::date_time::month_str_to_ushort<boost::gregorian::greg_month>(std::basic_string<char, std::char_traits<char>, std::allocator<char> >)': /usr/include/boost/token_functions.hpp:587: undefined reference to `boost::gregorian::greg_month::get_month_map_ptr()' collect2: ld returned 1 exit status Platform is FC2 gcc version 3.3.3 20040412 (Red Hat Linux 3.3.3-7) I built Boost from the SRC RPM boost-1.32.0-3.src.rpm with no special switches. I found a comment in the boost mailings advising linking to static library. This was successful. Is the general advice to only use the static libraries? Giles Anderson