-#ifndef HAVE_STRUCT_ADDRINFO
-struct addrinfo {
- int ai_flags; /* AI_PASSIVE, AI_CANONNAME */
- int ai_family; /* PF_xxx */
- int ai_socktype; /* SOCK_xxx */
- int ai_protocol; /* 0 or IPPROTO_xxx for IPv4 and IPv6 */
- size_t ai_addrlen; /* length of ai_addr */
- char *ai_canonname; /* canonical name for hostname */
- struct sockaddr *ai_addr; /* binary address */
- struct addrinfo *ai_next; /* next structure in linked list */
-};
-#endif /* !HAVE_STRUCT_ADDRINFO */
-
-#ifndef HAVE_GETADDRINFO
-int getaddrinfo(const char *hostname, const char *servname,
- const struct addrinfo *hints, struct addrinfo **res);
-#endif /* !HAVE_GETADDRINFO */
-
-#ifndef HAVE_GAI_STRERROR
-char *gai_strerror(int ecode);
-#endif /* !HAVE_GAI_STRERROR */
-
-#ifndef HAVE_FREEADDRINFO
-void freeaddrinfo(struct addrinfo *ai);
-#endif /* !HAVE_FREEADDRINFO */
-