+AC_SEARCH_LIBS(inet_ntop, resolv)
+
+# Solaris and HP-UX weirdness:
+# Search for libiconv_open (not iconv_open) to discover if -liconv is needed!
+AC_SEARCH_LIBS(libiconv_open, iconv)
+
+dnl AC_MSG_NOTICE([Looking in libraries: $LIBS])
+
+AC_CHECK_FUNCS(inet_ntop, , [AC_LIBOBJ(lib/inet_ntop)])
+AC_CHECK_FUNCS(inet_pton, , [AC_LIBOBJ(lib/inet_pton)])
+
+# Irix 6.5 has getaddrinfo but not the corresponding defines, so use
+# builtin getaddrinfo if one of the defines don't exist
+AC_CACHE_CHECK([whether defines needed by getaddrinfo exist],
+ rsync_cv_HAVE_GETADDR_DEFINES,[
+ AC_EGREP_CPP(yes, [
+ #include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netdb.h>
+ #ifdef AI_PASSIVE
+ yes
+ #endif],
+ rsync_cv_HAVE_GETADDR_DEFINES=yes,
+ rsync_cv_HAVE_GETADDR_DEFINES=no)])
+if test x"$rsync_cv_HAVE_GETADDR_DEFINES" = x"yes"; then
+ # Tru64 UNIX has getaddrinfo() but has it renamed in libc as
+ # something else so we must include <netdb.h> to get the
+ # redefinition.
+ AC_CHECK_FUNCS(getaddrinfo, ,
+ [AC_MSG_CHECKING([for getaddrinfo by including <netdb.h>])
+ AC_TRY_LINK([#include <sys/types.h>
+ #include <sys/socket.h>
+ #include <netdb.h>],[getaddrinfo(NULL, NULL, NULL, NULL);],
+ [AC_MSG_RESULT([yes])
+ AC_DEFINE(HAVE_GETADDRINFO, 1,
+ [Define to 1 if you have the "getaddrinfo" function.])],
+ [AC_MSG_RESULT([no])
+ AC_LIBOBJ(lib/getaddrinfo)])])
+ AC_CHECK_FUNCS(getnameinfo, , [AC_LIBOBJ(lib/getnameinfo)])
+else
+ AC_LIBOBJ(lib/getaddrinfo)
+ AC_LIBOBJ(lib/getnameinfo)
+fi
+
+AC_CHECK_MEMBER([struct sockaddr.sa_len],
+ [ AC_DEFINE(HAVE_SOCKADDR_LEN, 1, [Do we have sockaddr.sa_len?]) ],
+ [],
+ [
+#include <sys/types.h>
+#include <sys/socket.h>
+])
+
+AC_CHECK_MEMBER([struct sockaddr_in.sin_len],
+ [ AC_DEFINE(HAVE_SOCKADDR_IN_LEN, 1, [Do we have sockaddr_in.sin_len?]) ],
+ [],
+ [
+#include <sys/types.h>
+#include <sys/socket.h>
+#include <netinet/in.h>
+])