+char *pool_strdup0 (struct pool *, const char *, size_t) MALLOC_LIKE;
+char *pool_vasprintf (struct pool *, const char *, va_list)
+ MALLOC_LIKE PRINTF_FORMAT (2, 0);
+char *pool_asprintf (struct pool *, const char *, ...)
+ MALLOC_LIKE PRINTF_FORMAT (2, 3);