gentoo-overlay/net-analyzer/fping/files/fping-4.1-ipv6.patch

--- a/src/fping.c
+++ b/src/fping.c
@@ -687,7 +687,11 @@ int main(int argc, char** argv)
 
     /* validate various option settings */
 
-    if (socket4 < 0 && socket6 < 0) {
+    if (socket4 < 0
+#ifdef IPV6
+        && socket6 < 0
+#endif
+    ) {
         crash_and_burn("can't create socket (must run as root?)");
     }