--- configure.orig	2008-03-06 06:58:16.000000000 +0900
+++ configure	2012-04-23 14:21:29.000000000 +0900
@@ -4544,7 +4544,7 @@
 
 { echo "$as_me:$LINENO: host os is detected as $host_os " >&5
 echo "$as_me: host os is detected as $host_os " >&6;}
-if test -n "$sound-type"; then
+if test "$sound-type" != "no" ; then
   case $host_os in
     *linux*)
       sound_type=native