$NetBSD$

--- configure.orig	2007-01-23 11:03:59.000000000 -0800
+++ configure
@@ -4625,7 +4625,7 @@ done
 
 
 
-for ac_header in getopt.h unistd.h signal.h pthread.h argz.h
+for ac_header in getopt.h unistd.h signal.h pthread.h argz.h features.h
 do
 as_ac_Header=`echo "ac_cv_header_$ac_header" | $as_tr_sh`
 if eval "test \"\${$as_ac_Header+set}\" = set"; then
