From http://ftp.gnu.org/pub/gnu/readline/readline-6.3-patches/readline63-005

Signed-off-by: Gustavo Zacarias <gustavo@zacarias.com.ar>

			   READLINE PATCH REPORT
			   =====================

Readline-Release: 6.3
Patch-ID: readline63-005

Bug-Reported-by:	Juergen Daubert <jue@jue.li>
Bug-Reference-ID:	<20140303180430.GA7346@jue.netz>
Bug-Reference-URL:	http://lists.gnu.org/archive/html/bug-readline/2014-03/msg00002.html

Bug-Description:

There are still applications using the deprecated Function/VFunction/etc.
typedefs in rltypedefs.h.  This patch restores the typedefs, but attempts
to mark them as deprecated using gcc/clang attributes.  Thanks to Max Horn
for the suggestion.

Patch (apply with `patch -p0'):

*** a/readline-6.3-patched/rltypedefs.h	2011-03-26 14:53:31.000000000 -0400
--- b/rltypedefs.h	2014-04-10 11:30:45.000000000 -0400
***************
*** 27,30 ****
--- 27,49 ----
  #endif
  
+ /* Old-style, attempt to mark as deprecated in some way people will notice. */
+ 
+ #if !defined (_FUNCTION_DEF)
+ #  define _FUNCTION_DEF
+ 
+ #if defined(__GNUC__) || defined(__clang__)
+ typedef int Function () __attribute__ ((deprecated));
+ typedef void VFunction () __attribute__ ((deprecated));
+ typedef char *CPFunction () __attribute__ ((deprecated));
+ typedef char **CPPFunction () __attribute__ ((deprecated));
+ #else
+ typedef int Function ();
+ typedef void VFunction ();
+ typedef char *CPFunction ();
+ typedef char **CPPFunction ();
+ #endif
+ 
+ #endif /* _FUNCTION_DEF */
+ 
  /* New style. */
  
*** a/readline-6.3/patchlevel	2013-11-15 08:11:11.000000000 -0500
--- b/patchlevel	2014-03-21 08:28:40.000000000 -0400
***************
*** 1,3 ****
  # Do not edit -- exists only for use by patch
  
! 4
--- 1,3 ----
  # Do not edit -- exists only for use by patch
  
! 5