--- /dev/null
+#!/usr/bin/perl
+
+my %change = (
+ 'BUSYBOX' => 'make -C package busybox-clean',
+ '' => 'make target_clean'
+);
+
+foreach my $change (keys %change) {
+ my $v1 = `grep '$change' .config.test`;
+ my $v2 = `grep '$change' .config`;
+ $v1 eq $v2 or system($change{$change});
+}