$NetBSD: patch-configure,v 1.1 2012/05/20 21:07:25 marino Exp $

--- configure.orig	2011-12-18 23:22:41.000000000 +0000
+++ configure
@@ -17110,6 +17110,14 @@ $as_echo "#define ZMQ_FORCE_MUTEXES 1" >
 
         fi
         ;;
+    *dragonfly*)
+        # Define on DragonFly to enable all library features
+        CPPFLAGS="-D__BSD_VISIBLE $CPPFLAGS"
+
+$as_echo "#define ZMQ_HAVE_FREEBSD 1" >>confdefs.h
+$as_echo "#define ZMQ_DRAGONFLY 1" >>confdefs.h
+
+        ;;
     *freebsd*)
         # Define on FreeBSD to enable all library features
         CPPFLAGS="-D__BSD_VISIBLE $CPPFLAGS"
