--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/scripts/deprecated/usage.m	Sat Sep 20 14:25:30 2014 -0700
@@ -0,0 +1,66 @@
+## Copyright (C) 2014 John W. Eaton
+##
+## This file is part of Octave.
+##
+## Octave is free software; you can redistribute it and/or modify it
+## under the terms of the GNU General Public License as published by
+## the Free Software Foundation; either version 3 of the License, or (at
+## your option) any later version.
+##
+## Octave is distributed in the hope that it will be useful, but
+## WITHOUT ANY WARRANTY; without even the implied warranty of
+## MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+## General Public License for more details.
+##
+## You should have received a copy of the GNU General Public License
+## along with Octave; see the file COPYING.  If not, see
+## <http://www.gnu.org/licenses/>.
+
+## -*- texinfo -*-
+## @deftypefn {Built-in Function} {} usage (@var{msg})
+##
+## @code{usage} is deprecated and will be removed in Octave version 4.6.
+## Please use @code{print_usage} in all new code.
+##
+## Print the message @var{msg}, prefixed by the string @samp{usage: }, and
+## set Octave's internal error state such that control will return to the
+## top level without evaluating any more commands.  This is useful for
+## aborting from functions.
+## 
+## After @code{usage} is evaluated, Octave will print a traceback of all
+## the function calls leading to the usage message.
+## 
+## You should use this function for reporting problems errors that result
+## from an improper call to a function, such as calling a function with an
+## incorrect number of arguments, or with arguments of the wrong type.  For
+## example, most functions distributed with Octave begin with code like
+## this
+## 
+## @example
+## @group
+## if (nargin != 2)
+##   usage (\"foo (a, b)\");
+## endif
+## @end group
+## @end example
+## 
+## @noindent
+## to check for the proper number of arguments.
+## @seealso{print_usage}
+## @end deftypefn
+
+## Deprecated in version 4.2
+
+function retval = usage (varargin)
+
+  persistent warned = false;
+  if (! warned)
+    warned = true;
+    warning ("Octave:deprecated-function",
+             "usage is obsolete and will be removed from a future version of Octave, please use print_usage instead");
+  endif
+
+  retval = __usage__ (varargin{:});
+
+endfunction
+