Index: tcpdump-4.0.0/configure.in
===================================================================
--- tcpdump-4.0.0.orig/configure.in
+++ tcpdump-4.0.0/configure.in
@@ -160,8 +160,9 @@ yes)   AC_MSG_RESULT(yes)
        ipv6=no
        ;;
   esac ],
-
-  AC_TRY_RUN([ /* AF_INET6 available check */
+[
+  if test x"$cross_compiling" != "xyes"; then
+    AC_TRY_RUN([ /* AF_INET6 avalable check */
 #include <sys/types.h>
 #include <sys/socket.h>
 main()
@@ -180,7 +181,10 @@ main()
   ipv6=no],
 [ AC_MSG_RESULT(no)
   ipv6=no]
-))
+  )
+else
+  AC_MSG_FAILURE([Unable to check for ipv6 when crosscompiling, please specify.])
+fi])
 
 ipv6type=unknown
 ipv6lib=none
@@ -295,7 +299,7 @@ if test "$ipv6" = "yes" -a "$ipv6lib" !=
 fi
 
 
-if test "$ipv6" = "yes"; then
+if test x"$cross_compiling" != "xyes" -a "$ipv6" = "yes"; then
 	#
 	# XXX - on Tru64 UNIX 5.1, there is no "getaddrinfo()"
 	# function in libc; there are "ngetaddrinfo()" and