Android源码树中C代码的编译
https://www.cnblogs.com/palance/p/5229500.html
LOCAL_PATH := $(call my-dir)
include $(CLEAR_VARS)
LOCAL_MODULE_TAGS := optional
LOCAL_MODULE := helloworld
LOCAL_CFLAGS += -g -O0
LOCAL_SRC_FILES := $(call all-subdir-c-files)
include $(BUILD_EXECUTABLE)
如何在Android源码编译系统中添加一个C项目
https://blog.csdn.net/tech_pro/article/details/77896141