A build of 1.47.0 using VC++10.0 is producing warnings from only a few libraries. It would be great if these were cleared so that this popular compiler builds Boost without warnings at the default settings. Thanks, --Beman boost\test\impl\execution_monitor.ipp(1078) : warning C4702: unreachable code boost\test\impl\execution_monitor.ipp(1082) : warning C4702: unreachable code boost\test\utils\named_params.hpp(74) : warning C4702: unreachable code boost\test\utils\named_params.hpp(78) : warning C4702: unreachable code boost\test\utils\named_params.hpp(86) : warning C4702: unreachable code libs\iostreams\src\file_descriptor.cpp(241) : warning C4800: 'int' : forcing value to bool 'true' or 'false' (performance warning) libs\iostreams\src\file_descriptor.cpp(265) : warning C4244: 'argument' : conversion from 'std::streamsize' to 'DWORD', possible loss of data libs\iostreams\src\file_descriptor.cpp(281) : warning C4244: 'argument' : conversion from 'std::streamsize' to 'DWORD', possible loss of data libs\iostreams\src\mapped_file.cpp(325) : warning C4244: 'argument' : conversion from 'boost::iostreams::stream_offset' to 'SIZE_T', possible loss of data libs\iostreams\src\mapped_file.cpp(59) : warning C4244: 'return' : conversion from 'const boost::iostreams::stream_offset' to 'size_t', possible loss of data