Add CMake tests

test/cmake_subdir_test/main.cpp

@@ -0,0 +1,19 @@
+// Copyright 2019 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/throw_exception.hpp>
+#include <stdexcept>
+
+int main()
+{
+    try
+    {
+        boost::throw_exception( std::runtime_error( "" ) );
+        return 1;
+    }
+    catch( std::runtime_error const& )
+    {
+        return 0;
+    }
+}