[CMake] Add minimal cmake support

CMake file only supports add_subdirectory workflow.
No installation and no unit tests.

CMakeLists.txt

@@ -0,0 +1,26 @@
+# 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.TypeIndex is currently experimental at best
+#       and the interface is likely to change in the future
+
+cmake_minimum_required(VERSION 3.5)
+project(Boost.TypeIndex)
+
+add_library(boost_type_index INTERFACE)
+add_library(Boost::type_index ALIAS boost_type_index)
+
+target_include_directories(boost_type_index INTERFACE include)
+
+target_link_libraries(boost_type_index
+    INTERFACE
+        Boost::config
+        Boost::container_hash
+        Boost::core
+        Boost::preprocessor
+        Boost::smart_ptr
+        Boost::static_assert
+        Boost::throw_exception
+        Boost::type_traits
+)