config/abi/msvc_prefix.hpp

0001 //  (C) Copyright John Maddock 2003.
0002 //  Use, modification and distribution are subject to the
0003 //  Boost Software License, Version 1.0. (See accompanying file
0004 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
0005
0006 //
0007 // Boost binaries are built with the compiler's default ABI settings,
0008 // if the user changes their default alignment in the VS IDE then their
0009 // code will no longer be binary compatible with the bjam built binaries
0010 // unless this header is included to force Boost code into a consistent ABI.
0011 //
0012 // Note that inclusion of this header is only necessary for libraries with
0013 // separate source, header only libraries DO NOT need this as long as all
0014 // translation units are built with the same options.
0015 //
0016 #if defined(_M_X64)
0017 #  pragma pack(push,16)
0018 #else
0019 #  pragma pack(push,8)
0020 #endif
0021
0022