$NetBSD: patch-ag,v 1.2 2018/03/17 01:27:55 ryoon Exp $

--- configure.orig	2011-07-12 21:21:49.000000000 +0000
+++ configure
@@ -3154,7 +3154,7 @@ $as_echo "*** GNU, building POSIX versio
 	PPC_CXXFLAGS="$PPC_CXXFLAGS -pthread"
 	PPC_LDADD="$PPC_LDADD -lpthread -lrt"
 ;;
-freebsd*)
+freebsd* | dragonfly*)
 	OSAPI_DIR=posix
 	if test "x$enable_ui" = "xno"; then
 		enable_ui="x11"