[CMake] Add test for cmake file

test/test_cmake/CMakeLists.txt

@@ -0,0 +1,16 @@
+# Copyright 2018 Mike Dev
+# Distributed under the Boost Software License, Version 1.0.
+# See accompanying file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt
+#
+# NOTE: This does NOT run the unit tests for Boost.IO.
+#       It only tests, if the CMakeLists.txt file in it's root works as expected
+
+cmake_minimum_required( VERSION 3.5 )
+
+project( BoostIoCMakeSelfTest )
+
+add_subdirectory( ../../../config ${CMAKE_CURRENT_BINARY_DIR}/libs/config )
+add_subdirectory( ../.. ${CMAKE_CURRENT_BINARY_DIR}/libs/io )
+
+add_executable( boost_io_cmake_self_test main.cpp )
+target_link_libraries( boost_io_cmake_self_test Boost::io )

test/test_cmake/main.cpp

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+#include <boost/io/ios_state.hpp>
+#include <boost/io_fwd.hpp>
+
+int main() {
+}