diff --git a/ap/libc/glibc/glibc-2.23/stdio-common/psignal.c b/ap/libc/glibc/glibc-2.23/stdio-common/psignal.c
new file mode 100644
index 0000000..f391ada
--- /dev/null
+++ b/ap/libc/glibc/glibc-2.23/stdio-common/psignal.c
@@ -0,0 +1,52 @@
+/* Copyright (C) 1991-2016 Free Software Foundation, Inc.
+   This file is part of the GNU C Library.
+
+   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 <stdio.h>
+#include <signal.h>
+#include <stdlib.h>
+#include <libintl.h>
+#include <wchar.h>
+
+/* Print out on stderr a line consisting of the test in S, a colon, a space,
+   a message describing the meaning of the signal number SIG and a newline.
+   If S is NULL or "", the colon and space are omitted.  */
+void
+psignal (int sig, const char *s)
+{
+  const char *colon, *desc;
+
+  if (s == NULL || *s == '\0')
+    s = colon = "";
+  else
+    colon = ": ";
+
+  if (sig >= 0 && sig < NSIG && (desc = _sys_siglist[sig]) != NULL)
+    (void) __fxprintf (NULL, "%s%s%s\n", s, colon, _(desc));
+  else
+    {
+      char *buf;
+
+      if (__asprintf (&buf, _("%s%sUnknown signal %d\n"), s, colon, sig) < 0)
+	(void) __fxprintf (NULL, "%s%s%s\n", s, colon, _("Unknown signal"));
+      else
+	{
+	  (void) __fxprintf (NULL, "%s", buf);
+
+	  free (buf);
+	}
+    }
+}