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diff --git a/lib/Lintian/Check/Languages/Ocaml/ByteCode/Plugin.pm b/lib/Lintian/Check/Languages/Ocaml/ByteCode/Plugin.pm
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+# languages/ocaml/byte-code/plugin -- lintian check script -*- perl -*-
+#
+# Copyright (C) 2009 Stephane Glondu
+# Copyright (C) 2021 Felix Lechner
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 2 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program. If not, you can find it on the World Wide
+# Web at https://www.gnu.org/copyleft/gpl.html, or write to the Free
+# Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston,
+# MA 02110-1301, USA.
+
+package Lintian::Check::Languages::Ocaml::ByteCode::Plugin;
+
+use v5.20;
+use warnings;
+use utf8;
+
+use Moo;
+use namespace::clean;
+
+with 'Lintian::Check';
+
+sub visit_installed_files {
+ my ($self, $item) = @_;
+
+ my $no_extension = $item->basename;
+ $no_extension =~ s{ [.] [^.]+ $}{}x;
+
+ # For each .cmxs file, there must be a matching .cma or .cmo file
+ # (at least, in library packages)
+ $self->pointed_hint('ocaml-dangling-cmxs', $item->pointer)
+ if $item->name =~ m{ [.]cmxs $}x
+ && !$item->parent_dir->child($no_extension . '.cma')
+ && !$item->parent_dir->child($no_extension . '.cmo')
+ && $self->processable->name =~ /^lib/;
+
+ return;
+}
+
+1;
+
+# Local Variables:
+# indent-tabs-mode: nil
+# cperl-indent-level: 4
+# End:
+# vim: syntax=perl sw=4 sts=4 sr et