--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libiberty/xstrdup.c	Fri Jul 17 14:47:48 2009 +0900
@@ -0,0 +1,36 @@
+/* xstrdup.c -- Duplicate a string in memory, using xmalloc.
+   This trivial function is in the public domain.
+   Ian Lance Taylor, Cygnus Support, December 1995.  */
+
+/*
+
+@deftypefn Replacement char* xstrdup (const char *@var{s})
+
+Duplicates a character string without fail, using @code{xmalloc} to
+obtain memory.
+
+@end deftypefn
+
+*/
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include <sys/types.h>
+#ifdef HAVE_STRING_H
+#include <string.h>
+#else
+# ifdef HAVE_STRINGS_H
+#  include <strings.h>
+# endif
+#endif
+#include "ansidecl.h"
+#include "libiberty.h"
+
+char *
+xstrdup (const char *s)
+{
+  register size_t len = strlen (s) + 1;
+  register char *ret = XNEWVEC (char, len);
+  return (char *) memcpy (ret, s, len);
+}