Add test/thread

test/thread/CMakeLists.txt

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+# Copyright 2018 Peter Dimov
+# Distributed under the Boost Software License, Version 1.0.
+# (See accompanying file LICENSE_1_0.txt or copy at http://boost.org/LICENSE_1_0.txt)
+
+cmake_minimum_required(VERSION 3.5)
+
+project(CmakeConfigThreadTest LANGUAGES CXX)
+
+find_package(boost_thread 1.69.0 EXACT CONFIG)
+
+add_executable(main quick.cpp)
+target_link_libraries(main Boost::thread)
+
+enable_testing()
+add_custom_target(check COMMAND ${CMAKE_CTEST_COMMAND} --output-on-failure -C $<CONFIG>)
+
+add_test(main main)

test/thread/quick.cpp

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+
+// Copyright 2017, 2018 Peter Dimov.
+//
+// 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/thread.hpp>
+#include <boost/core/lightweight_test.hpp>
+
+void f( int & x, int y )
+{
+    x = y;
+}
+
+int main()
+{
+    int x = 0;
+
+    boost::thread th( f, boost::ref( x ), 12 );
+    th.join();
+
+    BOOST_TEST_EQ( x, 12 );
+
+    return boost::report_errors();
+}