--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/libiberty/xasprintf.c	Fri Oct 27 22:46:09 2017 +0900
@@ -0,0 +1,50 @@
+/* Implement the xasprintf function.
+   Copyright (C) 2014-2017 Free Software Foundation, Inc.
+   Contributed by Manuel Lopez-Ibanez.
+
+This file is part of the libiberty library.
+Libiberty is free software; you can redistribute it and/or
+modify it under the terms of the GNU Library General Public
+License as published by the Free Software Foundation; either
+version 2 of the License, or (at your option) any later version.
+
+Libiberty 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
+Library General Public License for more details.
+
+You should have received a copy of the GNU Library General Public
+License along with libiberty; see the file COPYING.LIB.  If not, write
+to the Free Software Foundation, Inc., 51 Franklin Street - Fifth
+Floor, Boston, MA 02110-1301, USA.  */
+
+#ifdef HAVE_CONFIG_H
+#include "config.h"
+#endif
+#include "ansidecl.h"
+#include "libiberty.h"
+
+#include <stdarg.h>
+
+/*
+
+@deftypefn Replacement char* xasprintf (const char *@var{format}, ...)
+
+Print to allocated string without fail.  If @code{xasprintf} fails,
+this will print a message to @code{stderr} (using the name set by
+@code{xmalloc_set_program_name}, if any) and then call @code{xexit}.
+
+@end deftypefn
+
+*/
+
+char *
+xasprintf (const char *fmt, ...)
+{
+  char *buf;
+  va_list ap;
+  va_start (ap, fmt);
+  buf = xvasprintf (fmt, ap);
+  va_end (ap);
+  return buf;
+}