+=head1 EXPORT
+
+The only function of this module, C<sysinfo>, and the constant C<LS_HAS_EXTENDED> are only exported on request.
+Functions are also exported by the C<:funcs> tag, and constants by C<:consts>.
+
+=cut
+
+use base qw/Exporter/;
+
+our @EXPORT = ();
+our %EXPORT_TAGS = (
+ 'funcs' => [ qw/sysinfo/ ],
+ 'consts' => [ qw/LS_HAS_EXTENDED/ ]
+);
+our @EXPORT_OK = map { @$_ } values %EXPORT_TAGS;
+$EXPORT_TAGS{'all'} = [ @EXPORT_OK ];
+
+=head1 BINARY COMPATIBILITY