--- /dev/null
+/*
+Copyright Redshift Software, Inc. 2012-2013
+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)
+*/
+
+#ifndef BOOST_PREDEF_OS_BSD_DRAGONFLY_H
+#define BOOST_PREDEF_OS_BSD_DRAGONFLY_H
+
+#include <boost/predef/os/bsd.h>
+
+/*`
+[heading `BOOST_OS_BSD_DRAGONFLY`]
+
+[@http://en.wikipedia.org/wiki/DragonFly_BSD DragonFly BSD] operating system.
+
+[table
+ [[__predef_symbol__] [__predef_version__]]
+
+ [[`__DragonFly__`] [__predef_detection__]]
+ ]
+ */
+
+#define BOOST_OS_BSD_DRAGONFLY BOOST_VERSION_NUMBER_NOT_AVAILABLE
+
+#if !BOOST_PREDEF_DETAIL_OS_DETECTED && ( \
+ defined(__DragonFly__) \
+ )
+# ifndef BOOST_OS_BSD_AVAILABLE
+# define BOOST_OS_BSD BOOST_VERSION_NUMBER_AVAILABLE
+# define BOOST_OS_BSD_AVAILABLE
+# endif
+# undef BOOST_OS_BSD_DRAGONFLY
+# if defined(__DragonFly__)
+# define BOOST_OS_DRAGONFLY_BSD BOOST_VERSION_NUMBER_AVAILABLE
+# endif
+#endif
+
+#if BOOST_OS_BSD_DRAGONFLY
+# define BOOST_OS_BSD_DRAGONFLY_AVAILABLE
+# include <boost/predef/detail/os_detected.h>
+#endif
+
+#define BOOST_OS_BSD_DRAGONFLY_NAME "DragonFly BSD"
+
+#include <boost/predef/detail/test.h>
+BOOST_PREDEF_DECLARE_TEST(BOOST_OS_BSD_DRAGONFLY,BOOST_OS_BSD_DRAGONFLY_NAME)
+
+#endif