--- /dev/null
+# /* Copyright (C) 2001
+# * Housemarque Oy
+# * http://www.housemarque.com
+# *
+# * Permission to copy, use, modify, sell and distribute this software is
+# * granted provided this copyright notice appears in all copies. This
+# * software is provided "as is" without express or implied warranty, and
+# * with no claim as to its suitability for any purpose.
+# */
+#
+# /* Revised by Paul Mensonides (2002) */
+#
+# /* See http://www.boost.org for most recent version. */
+#
+# ifndef BOOST_PREPROCESSOR_CONTROL_IF_HPP
+# define BOOST_PREPROCESSOR_CONTROL_IF_HPP
+#
+# include <boost/preprocessor/config/config.hpp>
+# include <boost/preprocessor/control/iif.hpp>
+# include <boost/preprocessor/logical/bool.hpp>
+#
+# /* BOOST_PP_IF */
+#
+# if ~BOOST_PP_CONFIG_FLAGS() & BOOST_PP_CONFIG_EDG()
+# define BOOST_PP_IF(cond, t, f) BOOST_PP_IIF(BOOST_PP_BOOL(cond), t, f)
+# else
+# define BOOST_PP_IF(cond, t, f) BOOST_PP_IF_I(cond, t, f)
+# define BOOST_PP_IF_I(cond, t, f) BOOST_PP_IIF(BOOST_PP_BOOL(cond), t, f)
+# endif
+#
+# endif