add experimental support for a new menuconfig submenu "Package features". allows selection between multiple packages providing the same feature, which affects dependencies of other packages. will be used e.g. for choosing between DirectFB and X.org for libraries like GTK2

SVN-Revision: 18056

scripts/metadata.pl

@@ -533,6 +533,30 @@ sub print_package_config_category($) {
 	undef $category{$cat};
 }
 
+sub print_package_features() {
+	keys %features > 0 or return;
+	print "menu \"Package features\"\n";
+	foreach my $n (keys %features) {
+		my @features = sort { $b->{priority} <=> $a->{priority} or $a->{title} cmp $b->{title} } @{$features{$n}};
+		print <<EOF;
+choice
+	prompt "$features[0]->{target_title}"
+	default FEATURE_$features[0]->{name}
+EOF
+
+		foreach my $feature (@features) {
+			print <<EOF;
+	config FEATURE_$feature->{name}
+		bool "$feature->{title}"
+		help
+$feature->{description}
+EOF
+		}
+		print "endchoice\n"
+	}
+	print "endmenu\n\n";
+}
+
 sub gen_package_config() {
 	parse_package_metadata($ARGV[0]) or exit 1;
 	print "menuconfig UCI_PRECONFIG\n\tbool \"Image configuration\"\n" if %preconfig;
@@ -549,6 +573,7 @@ sub gen_package_config() {
 EOF
 		}
 	}
+	print_package_features();
 	print_package_config_category 'Base system';
 	foreach my $cat (keys %category) {
 		print_package_config_category $cat;