在使用VS2015+VIRTUALGDB编译CUBEMX生成的代码时出现了一下错误:Debug/system_stm32f4xx.o.data+0x0): multiple definition of `SystemCoreClock'
1> Debug/system_stm32f4xx.o.data+0x0): first defined here
1> Debug/system_stm32f4xx.o.rodata+0x0): multiple definition of `AHBPrescTable'
1> Debug/system_stm32f4xx.o.rodata+0x0): first defined here
1> Debug/system_stm32f4xx.o: In function `SystemInit':
1> system_stm32f4xx.c.text.SystemInit+0x0): multiple definition of `SystemInit'
1> Debug/system_stm32f4xx.o:system_stm32f4xx.c.text.SystemInit+0x0): first defined here
1> Debug/system_stm32f4xx.o: In function `SystemCoreClockUpdate':
1> system_stm32f4xx.c.text.SystemCoreClockUpdate+0x0): multiple definition of `SystemCoreClockUpdate'
1> Debug/system_stm32f4xx.o:system_stm32f4xx.c.text.SystemCoreClockUpdate+0x0): first defined here