$(INSTALL_BIN) ./files/gre.sh $(1)/lib/netifd/proto/gre.sh
endef
+define Package/grev4/install
+ :
+endef
+
+define Package/grev6/install
+ :
+endef
+
$(eval $(call BuildPackage,gre))
$(eval $(call BuildPackage,grev4))
$(eval $(call BuildPackage,grev6))