+AC_PATH_PROGS(RUBY, ["${RUBY-ruby}"], [])
+AS_IF([test "x$RUBY" != x],
+ AC_MSG_CHECKING([for Ruby version])
+ [RUBY_VERSION=`$RUBY -e 'puts RUBY_VERSION'`]
+ AC_MSG_RESULT([$RUBY_VERSION])
+ [RUBY_DLEXT=`$RUBY -rrbconfig -e 'puts RbConfig::CONFIG[["DLEXT"]]'`]
+ AC_SUBST(RUBY_DLEXT))