[CMake] Add test for cmake file

test/test_cmake/CMakeLists.txt

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+# 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.Atomic.
+#       It only tests, if the CMakeLists.txt file in it's root works as expected
+
+cmake_minimum_required( VERSION 3.5 )
+
+project( BoostAtomicCMakeSelfTest )
+
+add_definitions( -DBOOST_ALL_NO_LIB )
+
+add_subdirectory( ../../../assert ${CMAKE_CURRENT_BINARY_DIR}/libs/assert )
+add_subdirectory( ../../../config ${CMAKE_CURRENT_BINARY_DIR}/libs/config )
+add_subdirectory( ../../../static_assert ${CMAKE_CURRENT_BINARY_DIR}/libs/static_assert )
+add_subdirectory( ../../../type_traits ${CMAKE_CURRENT_BINARY_DIR}/libs/type_traits )
+
+add_subdirectory( ../.. ${CMAKE_CURRENT_BINARY_DIR}/libs/boost_atomic )
+
+add_executable( boost_atomic_cmake_self_test main.cpp )
+target_link_libraries( boost_atomic_cmake_self_test Boost::atomic )

test/test_cmake/main.cpp

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+//  Copyright (c) 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)
+
+#include <boost/atomic.hpp>
+
+struct Dummy
+{
+    int x[128];
+};
+
+int main()
+{
+    Dummy d = {};
+    boost::atomic<Dummy> ad;
+
+    // this operation requires functions from
+    // the compiled part of Boost.Atomic
+    ad = d;
+}