--- a/gsm-fw/cfgmagic/functions	Sun Nov 01 00:07:09 2015 +0000
+++ b/gsm-fw/cfgmagic/functions	Sun Nov 01 03:05:06 2015 +0000
@@ -40,6 +40,35 @@
 	. "cfgmagic/feature.$1"
 }
 
+allow_target_feature() {
+	while [ $# != 0 ]
+	do
+		case "$target_feature_list" in
+			*" $1 "* | *" $1")
+				;;
+			*)
+				target_feature_list="$target_feature_list $1"
+				;;
+		esac
+		shift
+	done
+}
+
+check_target_feature() {
+    while [ $# != 0 ]
+    do
+	case "$target_feature_list" in
+	    *" $1 "* | *" $1" | *" OVERRIDE "* | *" OVERRIDE")
+		;;
+	    *)
+		echo "Error: feature $1 not supported on target $TARGET" 1>&2
+		exit 1
+		;;
+	esac
+	shift
+    done
+}
+
 export_to_c() {
 	while [ $# != 0 ]
 	do