diff --git a/ap/libc/glibc/glibc-2.23/string/test-stpcpy.c b/ap/libc/glibc/glibc-2.23/string/test-stpcpy.c
new file mode 100644
index 0000000..ce325e6
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/string/test-stpcpy.c
@@ -0,0 +1,52 @@
+/* Test stpcpy functions.
+   Copyright (C) 1999-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Written by Jakub Jelinek <jakub@redhat.com>, 1999.
+
+   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/>.  */
+
+#define STRCPY_RESULT(dst, len) ((dst) + (len))
+#define TEST_MAIN
+#ifndef WIDE
+# define TEST_NAME "stpcpy"
+#else
+# define TEST_NAME "wcpcpy"
+#endif /* !WIDE */
+#include "test-string.h"
+#ifndef WIDE
+# define CHAR char
+# define SIMPLE_STPCPY simple_stpcpy
+# define STPCPY stpcpy
+#else
+# include <wchar.h>
+# define CHAR wchar_t
+# define SIMPLE_STPCPY simple_wcpcpy
+# define STPCPY wcpcpy
+#endif /* !WIDE */
+
+CHAR *SIMPLE_STPCPY (CHAR *, const CHAR *);
+
+IMPL (SIMPLE_STPCPY, 0)
+IMPL (STPCPY, 1)
+
+CHAR *
+SIMPLE_STPCPY (CHAR *dst, const CHAR *src)
+{
+  while ((*dst++ = *src++) != '\0');
+  return dst - 1;
+}
+
+#undef CHAR
+#include "test-strcpy.c"