new file mode 100644
--- /dev/null
+++ b/lib/realloc.c
@@ -0,0 +1,40 @@
+/* Work around bug on some systems where realloc (NULL, n) fails.
+   Copyright (C) 1997 Free Software Foundation, Inc.
+
+   This program 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.
+
+   This program 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 this program; if not, write to the Free Software Foundation,
+   Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.  */
+
+/* written by Jim Meyering */
+
+#if HAVE_CONFIG_H
+# include <config.h>
+#endif
+#undef realloc
+
+#include <sys/types.h>
+
+char *realloc ();
+
+/* Change the size of an allocated block of memory P to N bytes,
+   with error checking.  If P is NULL, use malloc.  */
+
+char *
+rpl_realloc (p, n)
+     char *p;
+     size_t n;
+{
+  if (p == 0)
+    return malloc (n);
+  return realloc (p, n);
+}