Add deprecation notice to boost/bind.hpp

include/boost/bind.hpp

@@ -7,7 +7,6 @@
 # pragma once
 #endif
 
-//
 //  bind.hpp - binds function objects to arguments
 //
 //  Copyright (c) 2009, 2015 Peter Dimov
@@ -18,6 +17,15 @@
 //
 //  See http://www.boost.org/libs/bind/bind.html for documentation.
 //
+//  For backward compatibility, this header includes
+//  <boost/bind/bind.hpp> and then imports the placeholders _1, _2,
+//  _3, ... into the global namespace. Definitions in the global
+//  namespace are not a good practice and this use is deprecated.
+//  Please switch to including <boost/bind/bind.hpp> directly,
+//  adding the using directive locally where appropriate.
+
+#include <boost/config/header_deprecated.hpp>
+BOOST_HEADER_DEPRECATED( "<boost/bind/bind.hpp>" )
 
 #include <boost/bind/bind.hpp>