.\Obj\Object.axf: Error: L6218E: Undefined symbol __BASEPRICONFIG (referred from stm32f10x_nvic.o).
.\Obj\Object.axf: Error: L6218E: Undefined symbol __GetBASEPRI (referred from stm32f10x_nvic.o).
.\Obj\Object.axf: Error: L6218E: Undefined symbol __RESETFAULTMASK (referred from stm32f10x_nvic.o).
.\Obj\Object.axf: Error: L6218E: Undefined symbol __RESETPRIMASK (referred from stm32f10x_nvic.o).
.\Obj\Object.axf: Error: L6218E: Undefined symbol __SETFAULTMASK (referred from stm32f10x_nvic.o).
.\Obj\Object.axf: Error: L6218E: Undefined symbol __SETPRIMASK (referred from stm32f10x_nvic.o).
.\Obj\Object.axf: Not enough information to list image symbols.
.\Obj\Object.axf: Finished: 1 information, 0 warning and 6 error messages.
请问一下这是为什么呀?