+AC_MSG_CHECKING(Perl Modules to build)
+AC_MSG_RESULT(${COMP_PERL:-No Perl Modules will be built})
+
+# Options to pass when configuring perl module
+ppref=$prefix
+test "x$ppref" = xNONE && ppref=$ac_default_prefix
+
+PERL_MAKE_OPTIONS="PREFIX=$ppref LIB=$ppref/lib/perl/$PERL_VERSION"
+
+dnl pass additional perl options when generating Makefile from Makefile.PL
+AC_ARG_ENABLE(perl-site-install,
+[ --enable-perl-site-install by default the rrdtool perl modules are installed
+ together with rrdtool in $prefix/lib/perl. You have to
+ put a 'use lib qw($prefix/lib/perl)' into your scripts
+ when you want to use them. When you set this option
+ the perl modules will get installed wherever
+ your perl setup thinks it is best.],
+[PERL_MAKE_OPTIONS=],[])
+
+AC_ARG_WITH(perl-options,
+[ --with-perl-options=[OPTIONS] options to pass on command-line when
+ generating Makefile from Makefile.PL. If you set this
+ option, interesting things may happen unless you know
+ what you are doing!],
+[PERL_MAKE_OPTIONS=$withval])
+
+AC_SUBST(PERL_MAKE_OPTIONS)
+AC_SUBST(PERL)