$NetBSD$

ERROR: [check-portability.awk] => Found test ... == ...:
ERROR: [check-portability.awk] configure: if test "$ac_cv_lib_rt_shm_open" == yes ; then

--- configure.orig	2015-01-15 23:33:54.000000000 +0900
+++ configure	2015-01-15 23:36:02.000000000 +0900
@@ -15118,7 +15118,7 @@ _ACEOF
 
 fi
 
-if test "$ac_cv_lib_rt_shm_open" == yes ; then
+if test "$ac_cv_lib_rt_shm_open" = yes ; then
 	 RT_LIB="-lrt"
 fi
 
