when building boost.thread (from public CVS / HEAD) with CW 8.3 i get the following warnings: ... cw-C++-action ..\..\..\bin\boost\libs\thread\build\libboost_thread.lib\cw\debug\ threading-multi\read_write_mutex.obj ### mwcc Compiler: # File: ..\src\read_write_mutex.cpp # ------------------------------------ # 934: } # Warning: ^ # return value expected ### mwcc Compiler: # 1163: } # Warning: ^ # return value expected ### mwcc Compiler: # 1247: if (woken = do_wake_all_readers()) # Warning: ^ # possible unwanted assignment ### mwcc Compiler: # 1253: if (woken = do_wake_writer()) # Warning: ^ # possible unwanted assignment ... Bertolt