diff --git a/ap/libc/glibc/glibc-2.23/test-skeleton.c b/ap/libc/glibc/glibc-2.23/test-skeleton.c
new file mode 100644
index 0000000..a2edf83
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/test-skeleton.c
@@ -0,0 +1,525 @@
+/* Skeleton for test programs.
+   Copyright (C) 1998-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+   Contributed by Ulrich Drepper <drepper@cygnus.com>, 1998.
+
+   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 <errno.h>
+#include <fcntl.h>
+#include <getopt.h>
+#include <malloc.h>
+#include <paths.h>
+#include <search.h>
+#include <signal.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <sys/resource.h>
+#include <sys/wait.h>
+#include <sys/param.h>
+#include <time.h>
+
+/* The test function is normally called `do_test' and it is called
+   with argc and argv as the arguments.  We nevertheless provide the
+   possibility to overwrite this name.  */
+#ifndef TEST_FUNCTION
+# define TEST_FUNCTION do_test (argc, argv)
+#endif
+
+#ifndef TEST_DATA_LIMIT
+# define TEST_DATA_LIMIT (64 << 20) /* Data limit (bytes) to run with.  */
+#endif
+
+#ifndef TIMEOUT
+  /* Default timeout is two seconds.  */
+# define TIMEOUT 2
+#endif
+
+#define OPT_DIRECT 1000
+#define OPT_TESTDIR 1001
+
+static struct option options[] =
+{
+#ifdef CMDLINE_OPTIONS
+  CMDLINE_OPTIONS
+#endif
+  { "direct", no_argument, NULL, OPT_DIRECT },
+  { "test-dir", required_argument, NULL, OPT_TESTDIR },
+  { NULL, 0, NULL, 0 }
+};
+
+/* PID of the test itself.  */
+static pid_t pid;
+
+/* Directory to place temporary files in.  */
+static const char *test_dir;
+
+/* List of temporary files.  */
+struct temp_name_list
+{
+  struct qelem q;
+  char *name;
+} *temp_name_list;
+
+/* Add temporary files in list.  */
+static void
+__attribute__ ((unused))
+add_temp_file (const char *name)
+{
+  struct temp_name_list *newp
+    = (struct temp_name_list *) calloc (sizeof (*newp), 1);
+  char *newname = strdup (name);
+  if (newp != NULL && newname != NULL)
+    {
+      newp->name = newname;
+      if (temp_name_list == NULL)
+	temp_name_list = (struct temp_name_list *) &newp->q;
+      else
+	insque (newp, temp_name_list);
+    }
+  else
+    free (newp);
+}
+
+/* Delete all temporary files.  */
+static void
+delete_temp_files (void)
+{
+  while (temp_name_list != NULL)
+    {
+      remove (temp_name_list->name);
+      free (temp_name_list->name);
+
+      struct temp_name_list *next
+	= (struct temp_name_list *) temp_name_list->q.q_forw;
+      free (temp_name_list);
+      temp_name_list = next;
+    }
+}
+
+/* Create a temporary file.  Return the opened file descriptor on
+   success, or -1 on failure.  Write the file name to *FILENAME if
+   FILENAME is not NULL.  In this case, the caller is expected to free
+   *FILENAME.  */
+static int
+__attribute__ ((unused))
+create_temp_file (const char *base, char **filename)
+{
+  char *fname;
+  int fd;
+
+  fname = (char *) malloc (strlen (test_dir) + 1 + strlen (base)
+			   + sizeof ("XXXXXX"));
+  if (fname == NULL)
+    {
+      puts ("out of memory");
+      return -1;
+    }
+  strcpy (stpcpy (stpcpy (stpcpy (fname, test_dir), "/"), base), "XXXXXX");
+
+  fd = mkstemp (fname);
+  if (fd == -1)
+    {
+      printf ("cannot open temporary file '%s': %m\n", fname);
+      free (fname);
+      return -1;
+    }
+
+  add_temp_file (fname);
+  if (filename != NULL)
+    *filename = fname;
+  else
+    free (fname);
+
+  return fd;
+}
+
+/* Timeout handler.  We kill the child and exit with an error.  */
+static void
+__attribute__ ((noreturn))
+signal_handler (int sig __attribute__ ((unused)))
+{
+  int killed;
+  int status;
+
+  assert (pid > 1);
+  /* Kill the whole process group.  */
+  kill (-pid, SIGKILL);
+  /* In case setpgid failed in the child, kill it individually too.  */
+  kill (pid, SIGKILL);
+
+  /* Wait for it to terminate.  */
+  int i;
+  for (i = 0; i < 5; ++i)
+    {
+      killed = waitpid (pid, &status, WNOHANG|WUNTRACED);
+      if (killed != 0)
+	break;
+
+      /* Delay, give the system time to process the kill.  If the
+	 nanosleep() call return prematurely, all the better.  We
+	 won't restart it since this probably means the child process
+	 finally died.  */
+      struct timespec ts;
+      ts.tv_sec = 0;
+      ts.tv_nsec = 100000000;
+      nanosleep (&ts, NULL);
+    }
+  if (killed != 0 && killed != pid)
+    {
+      printf ("Failed to kill test process: %m\n");
+      exit (1);
+    }
+
+#ifdef CLEANUP_HANDLER
+  CLEANUP_HANDLER;
+#endif
+
+  if (sig == SIGINT)
+    {
+      signal (sig, SIG_DFL);
+      raise (sig);
+    }
+
+  /* If we expected this signal: good!  */
+#ifdef EXPECTED_SIGNAL
+  if (EXPECTED_SIGNAL == SIGALRM)
+    exit (0);
+#endif
+
+  if (killed == 0 || (WIFSIGNALED (status) && WTERMSIG (status) == SIGKILL))
+    puts ("Timed out: killed the child process");
+  else if (WIFSTOPPED (status))
+    printf ("Timed out: the child process was %s\n",
+	    strsignal (WSTOPSIG (status)));
+  else if (WIFSIGNALED (status))
+    printf ("Timed out: the child process got signal %s\n",
+	    strsignal (WTERMSIG (status)));
+  else
+    printf ("Timed out: killed the child process but it exited %d\n",
+	    WEXITSTATUS (status));
+
+  /* Exit with an error.  */
+  exit (1);
+}
+
+/* Avoid all the buffer overflow messages on stderr.  */
+static void
+__attribute__ ((unused))
+ignore_stderr (void)
+{
+  int fd = open (_PATH_DEVNULL, O_WRONLY);
+  if (fd == -1)
+    close (STDERR_FILENO);
+  else
+    {
+      dup2 (fd, STDERR_FILENO);
+      close (fd);
+    }
+  setenv ("LIBC_FATAL_STDERR_", "1", 1);
+}
+
+/* Set fortification error handler.  Used when tests want to verify that bad
+   code is caught by the library.  */
+static void
+__attribute__ ((unused))
+set_fortify_handler (void (*handler) (int sig))
+{
+  struct sigaction sa;
+
+  sa.sa_handler = handler;
+  sa.sa_flags = 0;
+  sigemptyset (&sa.sa_mask);
+
+  sigaction (SIGABRT, &sa, NULL);
+  ignore_stderr ();
+}
+
+/* Show people how to run the program.  */
+static void
+usage (void)
+{
+  size_t i;
+
+  printf ("Usage: %s [options]\n"
+	  "\n"
+	  "Environment Variables:\n"
+	  "  TIMEOUTFACTOR          An integer used to scale the timeout\n"
+	  "  TMPDIR                 Where to place temporary files\n"
+	  "\n",
+	  program_invocation_short_name);
+  printf ("Options:\n");
+  for (i = 0; options[i].name; ++i)
+    {
+      int indent;
+
+      indent = printf ("  --%s", options[i].name);
+      if (options[i].has_arg == required_argument)
+	indent += printf (" <arg>");
+      printf ("%*s", 25 - indent, "");
+      switch (options[i].val)
+	{
+	case OPT_DIRECT:
+	  printf ("Run the test directly (instead of forking & monitoring)");
+	  break;
+	case OPT_TESTDIR:
+	  printf ("Override the TMPDIR env var");
+	  break;
+	}
+      printf ("\n");
+    }
+}
+
+/* We provide the entry point here.  */
+int
+main (int argc, char *argv[])
+{
+  int direct = 0;	/* Directly call the test function?  */
+  int status;
+  int opt;
+  unsigned int timeoutfactor = 1;
+  pid_t termpid;
+
+  /* Make uses of freed and uninitialized memory known.  */
+  mallopt (M_PERTURB, 42);
+
+#ifdef STDOUT_UNBUFFERED
+  setbuf (stdout, NULL);
+#endif
+
+  while ((opt = getopt_long (argc, argv, "+", options, NULL)) != -1)
+    switch (opt)
+      {
+      case '?':
+	usage ();
+	exit (1);
+      case OPT_DIRECT:
+	direct = 1;
+	break;
+      case OPT_TESTDIR:
+	test_dir = optarg;
+	break;
+#ifdef CMDLINE_PROCESS
+	CMDLINE_PROCESS
+#endif
+      }
+
+  /* If set, read the test TIMEOUTFACTOR value from the environment.
+     This value is used to scale the default test timeout values. */
+  char *envstr_timeoutfactor = getenv ("TIMEOUTFACTOR");
+  if (envstr_timeoutfactor != NULL)
+    {
+      char *envstr_conv = envstr_timeoutfactor;
+      unsigned long int env_fact;
+
+      env_fact = strtoul (envstr_timeoutfactor, &envstr_conv, 0);
+      if (*envstr_conv == '\0' && envstr_conv != envstr_timeoutfactor)
+	timeoutfactor = MAX (env_fact, 1);
+    }
+
+  /* Set TMPDIR to specified test directory.  */
+  if (test_dir != NULL)
+    {
+      setenv ("TMPDIR", test_dir, 1);
+
+      if (chdir (test_dir) < 0)
+	{
+	  printf ("chdir: %m\n");
+	  exit (1);
+	}
+    }
+  else
+    {
+      test_dir = getenv ("TMPDIR");
+      if (test_dir == NULL || test_dir[0] == '\0')
+	test_dir = "/tmp";
+    }
+
+  /* Make sure we see all message, even those on stdout.  */
+  setvbuf (stdout, NULL, _IONBF, 0);
+
+  /* Make sure temporary files are deleted.  */
+  atexit (delete_temp_files);
+
+  /* Correct for the possible parameters.  */
+  argv[optind - 1] = argv[0];
+  argv += optind - 1;
+  argc -= optind - 1;
+
+  /* Call the initializing function, if one is available.  */
+#ifdef PREPARE
+  PREPARE (argc, argv);
+#endif
+
+  const char *envstr_direct = getenv ("TEST_DIRECT");
+  if (envstr_direct != NULL)
+    {
+      FILE *f = fopen (envstr_direct, "w");
+      if (f == NULL)
+        {
+          printf ("cannot open TEST_DIRECT output file '%s': %m\n",
+                  envstr_direct);
+          exit (1);
+        }
+
+      fprintf (f, "timeout=%u\ntimeoutfactor=%u\n", TIMEOUT, timeoutfactor);
+#ifdef EXPECTED_STATUS
+      fprintf (f, "exit=%u\n", EXPECTED_STATUS);
+#endif
+#ifdef EXPECTED_SIGNAL
+      switch (EXPECTED_SIGNAL)
+        {
+        default: abort ();
+# define init_sig(signo, name, text) \
+        case signo: fprintf (f, "signal=%s\n", name); break;
+# include <siglist.h>
+# undef init_sig
+        }
+#endif
+
+      if (temp_name_list != NULL)
+        {
+          struct temp_name_list *n;
+          fprintf (f, "temp_files=(\n");
+          for (n = temp_name_list;
+               n != NULL;
+               n = (struct temp_name_list *) n->q.q_forw)
+            fprintf (f, "  '%s'\n", n->name);
+          fprintf (f, ")\n");
+        }
+
+      fclose (f);
+      direct = 1;
+    }
+
+  /* If we are not expected to fork run the function immediately.  */
+  if (direct)
+    return TEST_FUNCTION;
+
+  /* Set up the test environment:
+     - prevent core dumps
+     - set up the timer
+     - fork and execute the function.  */
+
+  pid = fork ();
+  if (pid == 0)
+    {
+      /* This is the child.  */
+#ifdef RLIMIT_CORE
+      /* Try to avoid dumping core.  */
+      struct rlimit core_limit;
+      core_limit.rlim_cur = 0;
+      core_limit.rlim_max = 0;
+      setrlimit (RLIMIT_CORE, &core_limit);
+#endif
+
+#ifdef RLIMIT_DATA
+      /* Try to avoid eating all memory if a test leaks.  */
+      struct rlimit data_limit;
+      if (getrlimit (RLIMIT_DATA, &data_limit) == 0)
+	{
+	  if (TEST_DATA_LIMIT == RLIM_INFINITY)
+	    data_limit.rlim_cur = data_limit.rlim_max;
+	  else if (data_limit.rlim_cur > (rlim_t) TEST_DATA_LIMIT)
+	    data_limit.rlim_cur = MIN ((rlim_t) TEST_DATA_LIMIT,
+				       data_limit.rlim_max);
+	  if (setrlimit (RLIMIT_DATA, &data_limit) < 0)
+	    printf ("setrlimit: RLIMIT_DATA: %m\n");
+	}
+      else
+	printf ("getrlimit: RLIMIT_DATA: %m\n");
+#endif
+
+      /* We put the test process in its own pgrp so that if it bogusly
+	 generates any job control signals, they won't hit the whole build.  */
+      if (setpgid (0, 0) != 0)
+	printf ("Failed to set the process group ID: %m\n");
+
+      /* Execute the test function and exit with the return value.   */
+      exit (TEST_FUNCTION);
+    }
+  else if (pid < 0)
+    {
+      printf ("Cannot fork test program: %m\n");
+      exit (1);
+    }
+
+  /* Set timeout.  */
+  signal (SIGALRM, signal_handler);
+  alarm (TIMEOUT * timeoutfactor);
+
+  /* Make sure we clean up if the wrapper gets interrupted.  */
+  signal (SIGINT, signal_handler);
+
+  /* Wait for the regular termination.  */
+  termpid = TEMP_FAILURE_RETRY (waitpid (pid, &status, 0));
+  if (termpid == -1)
+    {
+      printf ("Waiting for test program failed: %m\n");
+      exit (1);
+    }
+  if (termpid != pid)
+    {
+      printf ("Oops, wrong test program terminated: expected %ld, got %ld\n",
+	      (long int) pid, (long int) termpid);
+      exit (1);
+    }
+
+  /* Process terminated normaly without timeout etc.  */
+  if (WIFEXITED (status))
+    {
+#ifndef EXPECTED_STATUS
+# ifndef EXPECTED_SIGNAL
+      /* Simply exit with the return value of the test.  */
+      return WEXITSTATUS (status);
+# else
+      printf ("Expected signal '%s' from child, got none\n",
+	      strsignal (EXPECTED_SIGNAL));
+      exit (1);
+# endif
+#else
+      if (WEXITSTATUS (status) != EXPECTED_STATUS)
+        {
+          printf ("Expected status %d, got %d\n",
+	          EXPECTED_STATUS, WEXITSTATUS (status));
+          exit (1);
+        }
+
+      return 0;
+#endif
+    }
+  /* Process was killed by timer or other signal.  */
+  else
+    {
+#ifndef EXPECTED_SIGNAL
+      printf ("Didn't expect signal from child: got `%s'\n",
+	      strsignal (WTERMSIG (status)));
+      exit (1);
+#else
+      if (WTERMSIG (status) != EXPECTED_SIGNAL)
+	{
+	  printf ("Incorrect signal from child: got `%s', need `%s'\n",
+		  strsignal (WTERMSIG (status)),
+		  strsignal (EXPECTED_SIGNAL));
+	  exit (1);
+	}
+
+      return 0;
+#endif
+    }
+}