diff --git a/ap/libc/glibc/glibc-2.23/stdio-common/fxprintf.c b/ap/libc/glibc/glibc-2.23/stdio-common/fxprintf.c
new file mode 100644
index 0000000..0972651
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/stdio-common/fxprintf.c
@@ -0,0 +1,55 @@
+/* Copyright (C) 2005-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@gnu.org>.
+
+   The GNU C Library is free software; you can redistribute it and/or
+   modify it under the terms of the GNU Lesser General Public
+   License as published by the Free Software Foundation; either
+   version 2.1 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
+   Lesser General Public License for more details.
+
+   You should have received a copy of the GNU Lesser General Public
+   License along with the GNU C Library; if not, see
+   <http://www.gnu.org/licenses/>.  */
+
+#include <assert.h>
+#include <ctype.h>
+#include <stdarg.h>
+#include <stdio.h>
+#include <wchar.h>
+#include <string.h>
+#include <libioP.h>
+
+
+int
+__fxprintf (FILE *fp, const char *fmt, ...)
+{
+  if (fp == NULL)
+    fp = stderr;
+
+  va_list ap;
+  va_start (ap, fmt);
+
+  int res;
+  if (_IO_fwide (fp, 0) > 0)
+    {
+      size_t len = strlen (fmt) + 1;
+      wchar_t wfmt[len];
+      for (size_t i = 0; i < len; ++i)
+	{
+	  assert (isascii (fmt[i]));
+	  wfmt[i] = fmt[i];
+	}
+      res = __vfwprintf (fp, wfmt, ap);
+    }
+  else
+    res = _IO_vfprintf (fp, fmt, ap);
+
+  va_end (ap);
+
+  return res;
+}