Borland C++ 6.4 emits a warning (in release mode) for function add_ref_lock() from sp_counted_base_w32.hpp ("cannot expand it inline because of for inside"). I use CVS version few weeks old. Wrapping the function with #pragma helps: ----------------- #include <boost/detail/workaround.hpp> .... #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) # pragma warn -8027 // function with "for" is not expanded inline #endif bool add_ref_lock() // true on success { .... } #if BOOST_WORKAROUND(__BORLANDC__, BOOST_TESTED_AT(0x564)) # pragma warn .8027 #endif --------------------- Could this workaround be applied? - it is a bit annoying and completely useless warning /Pavel