id summary reporter owner description type status milestone component version severity resolution keywords cc 4094 BOOST_INTRUSIVE_TT_TEST_MSC_FUNC_SIGS versus is_unary_or_binary_function_impl vziegler@… Ion Gaztañaga "With _MSC_EXTENSIONS, intrusive/detail/mpl.hpp defines both is_unary_or_binary_function_impl is_unary_or_binary_function_impl which will raise a compiler error. The fist definition should be disabled via preprocessor if defined(BOOST_INTRUSIVE_TT_TEST_MSC_FUNC_SIGS) and class templates for __cdecl and __fastcall should be added instead. Find a patch attached (boost 1.42.0). Regards, Valentin " Bugs closed Boost 1.43.0 intrusive Boost 1.42.0 Problem fixed