[Bug 282251] java/openjdk22: IPv6 / INET6 is broken

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=282251

--- Comment #6 from antonfb@hesiod.org ---
FYI: I set up to build the openjdk22 port with the following change.
This allows your simple test to work with the -Djava.net.preferIPv4Stack-false
but without the sysctl change.

I run a tomcat server with openjdk22 and this configuration to get a dual stack
tomcat webserver.

--- java.base/unix/native/libnio/ch/Net.c.orig  2024-11-21 20:37:03.701599031
-0800
+++ java.base/unix/native/libnio/ch/Net.c       2024-11-21 20:37:37.327417863
-0800
@@ -285,7 +285,7 @@
         return handleSocketError(env, errno);
     }

-#ifndef _BSDONLY_SOURCE
+#ifndef notdef /* _BSDONLY_SOURCE */
     /*
      * If IPv4 is available, disable IPV6_V6ONLY to ensure dual-socket
support.
      */

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