new file mode 100644
--- /dev/null
+++ b/liboctave/lo-error.h
@@ -0,0 +1,54 @@
+// error.h                                              -*- C++ -*-
+/*
+
+Copyright (C) 1992, 1993 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 (_error_h)
+#define _error_h 1
+
+#ifdef __GNUG__
+#pragma interface
+#endif
+
+// Tell g++ that fatal doesn't return;
+
+#ifdef __GNUG__
+typedef void v_fcn_cpc_x (const char *, ...);
+volatile v_fcn_cpc_x fatal;
+#endif
+
+typedef void (*liboctave_error_handler) (const char *, ...);
+
+extern void set_liboctave_error_handler (liboctave_error_handler f);
+
+extern void liboctave_fatal (const char *fmt, ...);
+
+// Current error state.
+extern int error_state;
+
+#endif
+
+/*
+;;; Local Variables: ***
+;;; mode: C++ ***
+;;; page-delimiter: "^/\\*" ***
+;;; End: ***
+*/