[Boost-users] thread warning ununsed variable

Hi, On Boost 1.45 I get a warning message in the condition_variable.hpp inline void condition_variable::wait(unique_lock<mutex>& m) { thread_cv_detail::lock_on_exit guard; detail::interruption_checker check_for_interruption(&internal_mutex,&cond); guard.activate(m); int const res=pthread_cond_wait(&cond,&internal_mutex); BOOST_ASSERT(!res); this_thread::interruption_point(); } the res variable isn't used (I compile the code with -O2 option) Have a nice day Phil