$NetBSD: patch-libstdc++-v3_configure.host,v 1.1 2012/06/23 22:13:02 marino Exp $

--- libstdc++-v3/configure.host.orig	2012-02-10 18:10:12.000000000 +0000
+++ libstdc++-v3/configure.host
@@ -239,6 +239,9 @@ case "${host_os}" in
     os_include_dir="os/djgpp"
     error_constants_dir="os/djgpp"
     ;;
+  dragonfly*)
+    os_include_dir="os/bsd/dragonfly"
+    ;;
   freebsd*)
     os_include_dir="os/bsd/freebsd"
     ;;