--- configure.orig	2014-12-20 04:39:02 UTC
+++ configure
@@ -40,16 +40,6 @@ else
   exit 1
 fi
 
-# Check encoding filter
-if CHECK_COMMAND qkc ; then
-  PROGRAM_ENCODEFILTER="qkc -q -u"
-elif CHECK_COMMAND nkf ; then
-  PROGRAM_ENCODEFILTER="nkf -x"
-else
-  echo "ERROR: Require qkc or nkf installed for encode filter."
-  exit 1
-fi
-
 # Check install program
 if test -x /usr/ucb/install ; then
   PROGRAM_INSTALL="/usr/ucb/install"