I can only support Beast on Visual Studio 2015 with Update 3 or later.
The way I handled this in AFIO v1 was to add C++ feature requirements in Boost.Build sufficient to exclude any Visual Studio before some version X. I also strongly recommend you add #error trapping of ancient compilers in your config.hpp. Otherwise you'll be plagued in years to come by users complaining about unobvious error messages when they do weird things with some older version of your library. I personally would even go so far as to #error out on any compiler which is not MSVC, clang nor GCC, and versions before specific hardcoded minimum versions. Niall -- ned Productions Limited Consulting http://www.nedproductions.biz/ http://ie.linkedin.com/in/nialldouglas/