+/**
+ * \file props_io.cxx
+ * Started Fall 2000 by David Megginson, david@megginson.com
+ * This code is released into the Public Domain.
+ *
+ * See props.html for documentation [replace with URL when available].
+ *
+ * $Id$
+ */
+
+#ifdef HAVE_CONFIG_H
+# include <simgear_config.h>
+#endif
#include <simgear/compiler.h>