+ifeq ($(strip $(SERIAL_LINK_ENABLE)), yes)
+ SERIAL_DIR = $(QUANTUM_DIR)/serial_link
+ SERIAL_PATH = $(QUANTUM_PATH)/serial_link
+ SERIAL_SRC = $(wildcard $(SERIAL_PATH)/protocol/*.c)
+ SERIAL_SRC += $(wildcard $(SERIAL_PATH)/system/*.c)
+ SRC += $(patsubst $(QUANTUM_PATH)/%,%,$(SERIAL_SRC))
+ OPT_DEFS += -DSERIAL_LINK_ENABLE
+ VAPTH += $(SERIAL_PATH)
+endif
+