[CMake] Add minimal cmake support

- CMake file only supports add_subdirectory workflow.
- Provides Boost::function_types target,
  but no installation and no unit tests.

CMakeLists.txt

@@ -0,0 +1,25 @@
+# Copyright 2019 Mike Dev
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at https://www.boost.org/LICENSE_1_0.txt
+#
+# NOTE: CMake support for Boost.FunctionTypes is currently experimental at best
+#       and the interface is likely to change in the future
+
+cmake_minimum_required(VERSION 3.5)
+project(Boost.FunctionTypes  LANGUAGES CXX)
+
+add_library(boost_function_types INTERFACE)
+add_library(Boost::function_types ALIAS boost_function_types)
+
+target_include_directories(boost_function_types INTERFACE include)
+
+target_link_libraries(boost_function_types
+    INTERFACE
+        Boost::config
+        Boost::core
+        Boost::detail
+        Boost::mpl
+        Boost::preprocessor
+        Boost::type_traits
+)
+