Add initial implementation of quick_exit

include/boost/core/quick_exit.hpp

@@ -0,0 +1,31 @@
+#ifndef BOOST_CORE_QUICK_EXIT_HPP_INCLUDED
+#define BOOST_CORE_QUICK_EXIT_HPP_INCLUDED
+
+// MS compatible compilers support #pragma once
+
+#if defined(_MSC_VER) && (_MSC_VER >= 1020)
+# pragma once
+#endif
+
+//  boost/core/quick_exit.hpp
+//
+//  Copyright 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/config.hpp>
+#include <cstdlib>
+
+namespace boost
+{
+
+void quick_exit( int code )
+{
+    std::quick_exit( code );
+}
+
+} // namespace boost
+
+#endif  // #ifndef BOOST_CORE_QUICK_EXIT_HPP_INCLUDED