* they won't be available unless used. When new symbols are probed
* in Configure, this is the way to force them into availability.
*
+ * BOOTSTRAP_CHARSET
* CHARBITS
* HAS_ASCTIME64
* HAS_CTIME64
* HAS_ISBLANK
* HAS_LOCALTIME64
* HAS_IP_MREQ
+ * HAS_IP_MREQ_SOURCE
* HAS_IPV6_MREQ
+ * HAS_IPV6_MREQ_SOURCE
* HAS_MKTIME64
* HAS_PRCTL
* HAS_PSEUDOFORK