|| (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
struct hostent *gethostbyname (const char *);
struct hostent *gethostbyaddr (const void *, socklen_t, int);
|| (defined(_XOPEN_SOURCE) && _XOPEN_SOURCE+0 < 700)
struct hostent *gethostbyname (const char *);
struct hostent *gethostbyaddr (const void *, socklen_t, int);