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--- /dev/null
+++ b/liboctave/oct-math.h
@@ -0,0 +1,49 @@
+/* oct-math.h                                    -*- C -*- */
+/*
+
+Copyright (C) 1996 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, 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+
+*/
+
+#if !defined (octave_oct_math_h)
+#define octave_oct_math_h 1
+
+#include <cmath>
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+// Provide declarations for these whether they are actually missing or
+// not, because they are not part of the standard math.h, and the
+// g++/libg++ installation no longer provides declarations for them.
+
+extern double acosh ();
+extern double asinh ();
+extern double atanh ();
+extern double erf ();
+extern double erfc ();
+extern double lgamma ();
+extern double gamma ();
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif