在工程中设置了路径，并且加入的相应的头文件，为什么用到相应.h里面的函数，编译链接时还会报错？

zdyzczq

报错如下：
Build target 'STM32F429I-Discovery'
linking...
STM32F429I-Discovery\STM32F429I-Discovery.axf: Error: L6218E: Undefined symbol HAL_RTCEx_BKUPWrite (referred from main.o).
STM32F429I-Discovery\STM32F429I-Discovery.axf: Error: L6218E: Undefined symbol HAL_RTC_GetDate (referred from main.o).
STM32F429I-Discovery\STM32F429I-Discovery.axf: Error: L6218E: Undefined symbol HAL_RTC_GetTime (referred from main.o).
STM32F429I-Discovery\STM32F429I-Discovery.axf: Error: L6218E: Undefined symbol HAL_RTC_Init (referred from main.o).
STM32F429I-Discovery\STM32F429I-Discovery.axf: Error: L6218E: Undefined symbol HAL_RTC_SetDate (referred from main.o).
STM32F429I-Discovery\STM32F429I-Discovery.axf: Error: L6218E: Undefined symbol HAL_RTC_SetTime (referred from main.o).
"STM32F429I-Discovery\STM32F429I-Discovery.axf" - 6 Errors, 0 Warning(s).
Target not created

请问各位这是什么原因呢？我把路径都改成英文后也还是不可以的

小温

.c文件中有没有include 该 .h 文件？

zdyzczq

回复【2楼】小温:
---------------------------------
肯定有哈

正点原子

找不到函数实体。