+dnl Solaris requires additional libraries for networking functions.
+
+AC_SEARCH_LIBS([inet_addr], [nsl])
+AC_SEARCH_LIBS([connect], [socket])
+AC_SEARCH_LIBS([inet_pton], [nsl socket resolv])
+AC_SEARCH_LIBS([inet_ntop], [nsl socket resolv])
+
+AC_CHECK_FUNCS_ONCE(getaddrinfo)
+