Linux build: Use sysroot when calculating dependencies

third_party/dpkg-dev/scripts/Dpkg/Control/Fields.pm

+# Copyright © 2007-2009 Raphaël Hertzog <hertzog@debian.org>
+#
+# 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, see <https://www.gnu.org/licenses/>.
+
+package Dpkg::Control::Fields;
+
+use strict;
+use warnings;
+
+our $VERSION = '1.00';
+
+use Carp;
+use Exporter qw(import);
+
+use Dpkg::Control::FieldsCore;
+use Dpkg::Vendor qw(run_vendor_hook);
+
+our @EXPORT = @Dpkg::Control::FieldsCore::EXPORT;
+
+# Register vendor specifics fields
+foreach my $op (run_vendor_hook('register-custom-fields')) {
+    next if not (defined $op and ref $op); # Skip when not implemented by vendor
+    my $func = shift @$op;
+    if ($func eq 'register') {
+        &field_register(@$op);
+    } elsif ($func eq 'insert_before') {
+        &field_insert_before(@$op);
+    } elsif ($func eq 'insert_after') {
+        &field_insert_after(@$op);
+    } else {
+        croak "vendor hook register-custom-fields sent bad data: @$op";
+    }
+}
+
+=encoding utf8
+
+=head1 NAME
+
+Dpkg::Control::Fields - manage (list of official) control fields
+
+=head1 DESCRIPTION
+
+The module contains a list of vendor-neutral and vendor-specific fieldnames
+with associated meta-data explaining in which type of control information
+they are allowed. The vendor-neutral fieldnames and all functions are
+inherited from Dpkg::Control::FieldsCore.
+
+=head1 AUTHOR
+
+Raphaël Hertzog <hertzog@debian.org>.
+
+=cut
+
+1;