1、Error: L6218E: Undefined symbol GUI_X_GetTaskId (referred from gui_task.o).
2、Error: L6218E: Undefined symbol GUI_X_InitOS (referred from gui_task.o).
3、Error: L6218E: Undefined symbol GUI_X_Lock (referred from gui_task.o).
4、Error: L6218E: Undefined symbol GUI_X_Unlock (referred from gui_task.o).