new file mode 100644
--- /dev/null
+++ b/src/defun-int.h
@@ -0,0 +1,76 @@
+// defun-int.h                                          -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993, 1994 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 2, 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, write to the Free
+Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.
+
+*/
+
+#if !defined (octave_defun_int_h)
+#define octave_defun_int_h 1
+
+#ifdef MAKE_BUILTINS
+
+#define DEFUN_INTERNAL(name, fname, sname, nargin_max, nargout_max, \
+		       is_text_fcn, doc) \
+  BEGIN_INSTALL_BUILTIN \
+    extern DECLARE_FUN(fname); \
+    static builtin_function sname = \
+      { name, nargin_max, nargout_max, is_text_fcn, fname, doc }; \
+    install_builtin_function (&sname); \
+  END_INSTALL_BUILTIN
+
+#define DEFALIAS_INTERNAL(alias, name)
+
+#else /* ! MAKE_BUILTINS */
+
+#define DEFUN_INTERNAL(name, fname, sname, nargin_max, nargout_max, \
+		       is_text_fcn, doc) \
+  DECLARE_FUN(fname)
+
+#define DEFALIAS_INTERNAL(alias, name)
+
+#endif /* ! MAKE_BUILTINS */
+
+#define DECLARE_FUN(fname) \
+  Octave_object \
+  fname (const Octave_object& args, int nargout)
+
+#define DEFINE_ARGV(warnfor) \
+  int argc = args.length (); \
+  char **argv = make_argv (args, warnfor); \
+  if (error_state) \
+    return retval
+
+#define DELETE_ARGV \
+  do \
+    { \
+      while (--argc) \
+	delete [] argv[argc]; \
+      delete [] argv; \
+    } \
+  while (0)
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/