Linux build: Use sysroot when calculating dependencies

third_party/dpkg-dev/scripts/Dpkg/Source/Package/V3/Custom.pm

+# Copyright © 2008 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::Source::Package::V3::Custom;
+
+use strict;
+use warnings;
+
+our $VERSION = '0.01';
+
+use parent qw(Dpkg::Source::Package);
+
+use Dpkg;
+use Dpkg::Gettext;
+use Dpkg::ErrorHandling;
+
+our $CURRENT_MINOR_VERSION = '0';
+
+sub parse_cmdline_option {
+    my ($self, $opt) = @_;
+    if ($opt =~ /^--target-format=(.*)$/) {
+        $self->{options}{target_format} = $1;
+        return 1;
+    }
+    return 0;
+}
+sub do_extract {
+    error(_g("Format `3.0 (custom)' is only used to create source packages"));
+}
+
+sub can_build {
+    my ($self, $dir) = @_;
+
+    return (0, _g('no files indicated on command line'))
+        unless scalar(@{$self->{options}{ARGV}});
+    return 1;
+}
+
+sub do_build {
+    my ($self, $dir) = @_;
+    # Update real target format
+    my $format = $self->{options}{target_format};
+    error(_g('--target-format option is missing')) unless $format;
+    $self->{fields}{'Format'} = $format;
+    # Add all files
+    foreach my $file (@{$self->{options}{ARGV}}) {
+        $self->add_file($file);
+    }
+}
+
+1;