execution_context.hpp gives errors when building with VS2015RC

[robvdnieuwenhof@…]

When building boost 1_58 wirh VS2015RC it gives the following errors:

Unknown compiler version - please run the configure tests and report the results
boost/context/execution_context.hpp(140): error C2492: 'boost::context::execution_context::main_ctx_': data with thread storage duration may not have dll interface
boost/context/execution_context.hpp(140): warning C4251: 'boost::context::execution_context::main_ctx_': struct 'boost::context::execution_context::fcontext' needs to have dll-interface to be used by clients of class 'boost::context::execution_context'
boost/context/execution_context.hpp(59): note: see declaration of 'boost::context::execution_context::fcontext'
boost/context/execution_context.hpp(140): error C2492: 'private: static boost::context::execution_context::fcontext boost::context::execution_context::main_ctx_': data with thread storage duration may not have dll interface
boost/context/execution_context.hpp(141): error C2492: 'boost::context::execution_context::current_ctx_': data with thread storage duration may not have dll interface
boost/context/execution_context.hpp(141): warning C4251: 'boost::context::execution_context::current_ctx_': class 'boost::intrusive_ptr<boost::context::execution_context::fcontext>' needs to have dll-interface to be used by clients of class 'boost::context::execution_context'
boost/context/execution_context.hpp(141): error C2492: 'private: static boost::intrusive_ptr<boost::context::execution_context::fcontext> boost::context::execution_context::current_ctx_': data with thread storage duration may not have dll interface
boost/context/execution_context.hpp(143): warning C4251: 'boost::context::execution_context::ptr_': class 'boost::intrusive_ptr<boost::context::execution_context::fcontext>' needs to have dll-interface to be used by clients of class 'boost::context::execution_context'