在小熊派开发时，编译出现问题

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？