The release notes for Boost 1.43 says "Put the implementation of random_device in a compiled lib, and added Windows support." Trying to use this library does not seem to work for me, under visual studio 2005, with static libraries. #include <cstdlib> #include int main(int argc, char* argv[]) { boost::random_device d; return EXIT_SUCCESS; } 1>libboost_random-vc80-mt-sgd-1_43.lib(random_device.obj) : error LNK2005: "public: static bool const boost::random_device::has_fixed_range" (?has_fixed_range@random_device@boost@@2_NB) already defined in main.obj 1>libboost_random-vc80-mt-sgd-1_43.lib(random_device.obj) : error LNK2005: "public: static unsigned int const boost::random_device::min_value" (?min_value@random_device@boost@@2IB) already defined in main.obj 1>libboost_random-vc80-mt-sgd-1_43.lib(random_device.obj) : error LNK2005: "public: static unsigned int const boost::random_device::max_value" (?max_value@random_device@boost@@2IB) already defined in main.obj 1>Debug\Win32\random_device.exe : fatal error LNK1169: one or more multiply defined symbols found -- Eld på åren og sol på eng gjer mannen fegen og fjåg. [Jøtul] <demo> 2010 Tore Halvorsen || +052 0553034554