在运行b6实例，进行改编使其可以通过串口输出温湿度。修改完程序后编译出现问题，日志如下：
Failed building output/bin/Hi3861_wifiiot_app.out: Error 1
Traceback (most recent call last):
File "../../build/lite/build_ext_components.py", line 64, in <module>
sys.exit(main())
File "../../build/lite/build_ext_components.py", line 58, in main
cmd_exec(args.command)
File "../../build/lite/build_ext_components.py", line 32, in cmd_exec
raise Exception("{} failed, return code is {}".format(cmd, ret_code))
Exception: ['sh', 'hm_build.sh'] failed, return code is 2
ninja: build stopped: subcommand failed.
这到底是出现什么问题了呢？
