$NetBSD: patch-configure,v 1.5 2017/05/23 15:12:57 jperkin Exp $

Don't blanket define _XOPEN_SOURCE on SunOS, patch where required instead.

--- configure.orig	2017-04-05 15:25:13.000000000 +0000
+++ configure
@@ -23169,7 +23169,7 @@ case $host_os in
         # ... this opt-in to get sockaddr_in6 and sockaddr_storage...
         CFLAGS="$CFLAGS -D__EXTENSIONS__"
         # ... and this opt-in to get file descriptor passing support
-        CFLAGS="$CFLAGS -D_XOPEN_SOURCE=500"
+        #CFLAGS="$CFLAGS -D_XOPEN_SOURCE=500"
         ;;
 esac