X-Git-Url: https://git.archive.openwrt.org/?a=blobdiff_plain;f=scripts%2Fkconfig.pl;h=b91cdf397aa828f28e6533b82fc5a54b0144ef4a;hb=97ef5324572a921cb5ed9fbd8783120a7accdbeb;hp=7073e3b1ae426fedcf86d3034f713b1e320fa734;hpb=ddac78a7682a411dfc3e06971c14c216c35cce00;p=openwrt.git

diff --git a/scripts/kconfig.pl b/scripts/kconfig.pl
index 7073e3b1ae..b91cdf397a 100755
--- a/scripts/kconfig.pl
+++ b/scripts/kconfig.pl
@@ -73,20 +73,25 @@ sub config_add($$$) {
 		my %cfg = %$_;
 		
 		foreach my $config (keys %cfg) {
-			next if $mod_plus and $config{$config} and $config{$config} eq "y";
+			if ($mod_plus and $config{$config}) {
+				next if $config{$config} eq "y";
+				next if $cfg{$config} eq '#undef';
+			}
 			$config{$config} = $cfg{$config};
 		}
 	}
 	return \%config;
 }
 
-sub config_diff($$) {
+sub config_diff($$$) {
 	my $cfg1 = shift;
 	my $cfg2 = shift;
+	my $new_only = shift;
 	my %config;
 	
 	foreach my $config (keys %$cfg2) {
 		if (!defined($cfg1->{$config}) or $cfg1->{$config} ne $cfg2->{$config}) {
+			next if $new_only and !defined($cfg1->{$config}) and $cfg2->{$config} eq '#undef';
 			$config{$config} = $cfg2->{$config};
 		}
 	}
@@ -146,7 +151,11 @@ sub parse_expr {
 	} elsif ($arg eq '>') {
 		my $arg1 = parse_expr($pos);
 		my $arg2 = parse_expr($pos);
-		return config_diff($arg1, $arg2);
+		return config_diff($arg1, $arg2, 0);
+	} elsif ($arg eq '>+') {
+		my $arg1 = parse_expr($pos);
+		my $arg2 = parse_expr($pos);
+		return config_diff($arg1, $arg2, 1);
 	} elsif ($arg eq '-') {
 		my $arg1 = parse_expr($pos);
 		my $arg2 = parse_expr($pos);