id summary reporter owner description type status milestone component version severity resolution keywords cc 5468 ASIO does not use the standard BOOST ABI mechanism brian@… chris_kohlhoff BOOST libraries should all use the ABI support that is built into boost. For other boost libraries, in the boost/config/user.hpp you can point to your own header files where you can insert the #pragma pack statement. ASIO does not use this mechanism, it has its own headers in asio/detail/push_options.hpp. Bugs new To Be Determined asio Boost 1.46.1 Problem