AC_ARG_WITH(mcpu,
[ --with-mcpu[=CPU] Set name of CPU for gcc -mcpu])
-if test "$withval" == "" -o test "$withval" == "no" -o test "$withval" == "yes" ; then
+if test "$withval" == "no" -o "$withval" == "yes" -o "$withval" == ""; then
AC_MSG_RESULT([no])
else
AC_MSG_RESULT([$withval])