+ * ping/ping_impl.h [!USE_IPV6] (suboptions): New external. Other way round,
* ping/ping_impl.h (suboptions) [!USE_IPV6]: New external.
+ * ping/ping_impl.h [!USE_IPV6] (suboptions): New external. Other way round,
* ping/ping_impl.h (suboptions) [!USE_IPV6]: New external.