+char *strdup (const char *);
+char *strndup (const char *, size_t);
+char *strsignal(int);
+#endif
+
+#if defined(_XOPEN_SOURCE) || defined(_GNU_SOURCE)
+void *memccpy (void *, const void *, int, size_t);
+#endif
+
+#ifdef _BSD_SOURCE
+size_t strlcat (char *, const char *, size_t);
+size_t strlcpy (char *, const char *, size_t);
+#endif