KEIL~未定义的符号os_set_env

Question

将Keil与KL46Z板一起使用我发现了这些错误......

<img ng-show="showImage" ng-src="{{json.user.picture}}" ng-error="showImage = false">

...当我尝试构建此代码时：

.\Flash\Blinky.axf: Error: L6218E: Undefined symbol os_set_env (referred from pr05.o).
.\Flash\Blinky.axf: Error: L6218E: Undefined symbol rt_sys_init (referred from pr05.o).
Not enough information to list image symbols.

我做错了什么？