[Problem with <bind.hpp> and <function.h> on BCC 6.4] I found what;s the cause: <boost/mem_fn.hpp> is included by <function.hpp> and so if one writes: ---------------- #include <boost/function.hpp> #define BOOST_MEM_FN_ENABLE_FASTCALL #include <boost/bind.hpp> ---------------- it results with Bind using differently pre-processed <mem_fn.hpp> than it is expected. Bellow is solution to produce clean error message when this situation happens: ------- file boost/mem_fn.hpp -------------- 1. remove #pragma once 2. on its place put following text: // Since this header is included by <function.hpp>: if you define // any of following tags after that and then include <bind.hpp>, // compilation will fail with hard to understand message. // // The macros bellow are in order to give early and understandable // failure during precompilation. #ifdef BOOST_BIND_ENABLE_STDCALL # define BOOST_BIND_ENABLE_STDCALL_TAG #endif #ifdef BOOST_BIND_ENABLE_FASTCALL # define BOOST_BIND_ENABLE_FASTCALL_TAG #endif #ifdef BOOST_BIND_ENABLE_PASCA # define BOOST_BIND_ENABLE_PASCAL_TAG #endif 3. at the end of mem_fn.hpp put: ... #else // Check for multiple include with different calling conventions enabled. // See top of header for more details. #ifdef BOOST_BIND_ENABLE_STDCALL # ifndef BOOST_BIND_ENABLE_STDCALL_TAG # error <function.hpp> or other header using <mem_fn.hpp> was included before <bind.hpp>. Please include <bind.hpp> first. # endif #endif #ifdef BOOST_BIND_ENABLE_FASTCALL # ifndef BOOST_BIND_ENABLE_FASTCALL_TAG # error <function.hpp> or other header using <mem_fn.hpp> was included before <bind.hpp>. Please include <bind.hpp> first. # endif #endif #ifdef BOOST_BIND_ENABLE_PASCAL # ifndef BOOST_BIND_ENABLE_PASCAL_TAG # error <function.hpp> or other header using <mem_fn.hpp> was included before <bind.hpp>. Please include <bind.hpp> first. # endif #endif #endif // #ifndef BOOST_MEM_FN_HPP_INCLUDED ------------------------------------ /Pavel