android.mk自动添加cpp文件

LOCAL_SRC_FILES := hellolua/main.cpp \
../../Classes/AppDelegate.cpp

#travers all the directory and sub_directory
define walk
$(wildcard $(1)) $(foreach e, $(wildcard $(1)/*), $(call walk, $(e)))
endef

#traverse Classes Directory
ALL_FILES = $(call walk, $(LOCAL_PATH)/../../Classes)

FILE_LIST := hellolua/main.cpp

FILE_LIST += $(filter %.cpp, $(ALL_FILES))

FILE_INCLUDES := $(shell find $(LOCAL_PATH)/../../Classes -type d)

#source file will be compiled
LOCAL_SRC_FILES := $(FILE_LIST:$(LOCAL_PATH)/%=%)