The comment in boost/config/user.hpp gives 2 examples, both of which appear to be invalid. ------------------------------ // BOOST_ALL_DYN_LINK: Forces all libraries that have separate source, // to be linked as dll's rather than static libraries on Microsoft Windows // (this macro is used to turn on __declspec(dllimport) modifiers, so that // the compiler knows which symbols to look for in a dll rather than in a // static library). Note that there may be some libraries that can only // be statically linked (Boost.Test for example) and others which may only // be dynamically linked (Boost.Threads for example), in these cases this // macro has no effect. // #define BOOST_ALL_DYN_LINK ------------------------------ I believe Boost.Test can now be linked dynamically and Boost.Threads can now be linked statically. -- Michael Marcin