$NetBSD: patch-configure,v 1.1 2010/05/12 21:27:02 rillig Exp $

The remaining pieces of:
http://sourceforge.net/tracker/index.php?func=detail&aid=1864687&group_id=54091&atid=472657

--- configure.orig	2010-03-06 23:29:12.000000000 +0100
+++ configure	2010-05-12 23:20:00.000000000 +0200
@@ -2255,7 +2255,7 @@
 	Linux)
 		FOUND_OS="linux"
 		;;
-	OpenBSD | FreeBSD | NetBSD)
+	OpenBSD | FreeBSD | NetBSD | DragonFly)
 		# *BSD has important stuff (from ports)
 		# in /usr/local ...
 		CFLAGS="$CFLAGS -I/usr/local/include -L/usr/local/lib"
@@ -3693,6 +3693,7 @@
 
 
 
+if false; then
 { $as_echo "$as_me:${as_lineno-$LINENO}: checking for main in -lstdc++" >&5
 $as_echo_n "checking for main in -lstdc++... " >&6; }
 if test "${ac_cv_lib_stdcpp_main+set}" = set; then :
@@ -3728,6 +3729,7 @@
 else
   as_fn_error "stdc++ library not found" "$LINENO" 5
 fi
+fi