Add C++14 support based on https://github.com/boostorg/config/pull/39

include/boost/config/compiler/codegear.hpp

@@ -123,6 +123,17 @@
 #define BOOST_NO_CXX11_REF_QUALIFIERS
 #define BOOST_NO_CXX11_FINAL
 
+// C++ 14:
+#define BOOST_NO_CXX14_AGGREGATE_NSDMI
+#define BOOST_NO_CXX14_BINARY_LITERALS
+#define BOOST_NO_CXX14_CONSTEXPR
+#define BOOST_NO_CXX14_DECLTYPE_AUTO
+#define BOOST_NO_CXX14_DIGIT_SEPARATOR
+#define BOOST_NO_CXX14_GENERIC_LAMBDAS
+#define BOOST_NO_CXX14_INITIALIZED_LAMBDA_CAPTURE
+#define BOOST_NO_CXX14_RETURN_TYPE_DEDUCTION
+#define BOOST_NO_CXX14_VARIABLE_TEMPLATES
+
 //
 // TR1 macros:
 //