+dnl Check for Ruby.
+AC_PATH_PROG(RUBY, ruby, no)
+
+AC_ARG_ENABLE(ruby,[ --disable-ruby do not build the ruby modules],
+[],[enable_ruby=yes])
+
+
+if test "x$RUBY" = "xno" -o x$enable_ruby = xno; then
+ COMP_RUBY=
+else
+ COMP_RUBY="ruby"
+
+fi
+
+AC_MSG_CHECKING(Ruby Modules to build)
+AC_MSG_RESULT(${COMP_RUBY:-No Ruby Modules will be built})
+
+dnl pass additional ruby options when generating Makefile from Makefile.PL
+AC_ARG_ENABLE(ruby-site-install,
+[ --enable-ruby-site-install by default the rrdtool ruby modules are installed
+ together with rrdtool in $prefix/lib/ruby. You have to
+ add $prefix/lib/ruby/$ruby_version/$sitearch to you $: variable
+ for ruby to find the RRD.so file.],
+[RUBY_MAKE_OPTIONS=],[RUBY_MAKE_OPTIONS="sitedir=$prefix/lib/ruby"])
+
+
+AC_ARG_WITH(ruby-options,
+[ --with-ruby-options=[OPTIONS] options to pass on command-line when
+ generating Makefile from extconf.rb. If you set this
+ option, interesting things may happen unless you know
+ what you are doing!],
+[RUBY_MAKE_OPTIONS=$withval])
+
+AC_SUBST(RUBY_MAKE_OPTIONS)
+AC_SUBST(RUBY)
+AC_SUBST(COMP_RUBY)
+
+