/usr/lib/x86_64-linux-gnu/perl5/5.24/List/Util/XS.pm is in libscalar-list-utils-perl 1:1.47-1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 | package List::Util::XS;
use strict;
use warnings;
use List::Util;
our $VERSION = "1.47"; # FIXUP
$VERSION = eval $VERSION; # FIXUP
1;
__END__
=head1 NAME
List::Util::XS - Indicate if List::Util was compiled with a C compiler
=head1 SYNOPSIS
use List::Util::XS 1.20;
=head1 DESCRIPTION
C<List::Util::XS> can be used as a dependency to ensure List::Util was
installed using a C compiler and that the XS version is installed.
During installation C<$List::Util::XS::VERSION> will be set to
C<undef> if the XS was not compiled.
Starting with release 1.23_03, Scalar-List-Util is B<always> using
the XS implementation, but for backwards compatibility, we still
ship the C<List::Util::XS> module which just loads C<List::Util>.
=head1 SEE ALSO
L<Scalar::Util>, L<List::Util>, L<List::MoreUtils>
=head1 COPYRIGHT
Copyright (c) 2008 Graham Barr <gbarr@pobox.com>. All rights reserved.
This program is free software; you can redistribute it and/or
modify it under the same terms as Perl itself.
=cut
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