new file mode 100644
--- /dev/null
+++ b/liboctave/tmpnam.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 1991, 1993 Free Software Foundation, Inc.
+This file is part of the GNU C Library.
+
+The GNU C Library 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 of the
+License, or (at your option) any later version.
+
+The GNU C Library 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 the GNU C Library; see the file COPYING.  If
+not, write to the Free Software Foundation, Inc., 675 Mass Ave,
+Cambridge, MA 02139, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+
+#ifndef HAVE_TEMPNAM
+
+#include <stddef.h>
+#include <stdio.h>
+#include <string.h>
+
+extern char *__stdio_gen_tempname (const char *dir, const char *pfx,
+				   int dir_search, size_t *lenptr,
+				   FILE **streamptr);
+
+/* Generate a unique filename in P_tmpdir.  */
+char *
+tmpnam (register char *s)
+{
+  register char *t = __stdio_gen_tempname((const char *) NULL,
+					  (const char *) NULL, 0,
+					  (size_t *) NULL, (FILE **) NULL);
+
+  if (t == NULL)
+    return NULL;
+
+  if (s != NULL)
+    (void) strcpy(s, t);
+  else
+    s = t;
+
+  return s;
+}
+
+#endif