编译信息如下，请问该如何修改代码或者库文件？
Rebuild target 'STM32F103C8x'compiling main.c...compiling gpio.c...compiling tim.c...compiling usart.c...compiling stm32f1xx_it.c...compiling stm32f1xx_hal_msp.c...compiling gizwits_product.c...compiling gizwits_protocol.c.....\Gizwits\gizwits_protocol.c(185): warning: #550-D: variable "lastReportTime" was set but never used static uint32_t lastReportTime = 0;..\Gizwits\gizwits_protocol.c(186): warning: #550-D: variable "currentTime" was set but never used uint32_t currentTime = 0;..\Gizwits\gizwits_protocol.c: 2 warnings 0 errorscompiling hal_key.c...compiling common.c...compiling dataPointTools.c...compiling ringbuffer.c...compiling stm32f1xx_hal_gpio_ex.c...compiling stm32f1xx_hal_tim.c...compiling stm32f1xx_hal_tim_ex.c...compiling stm32f1xx_hal.c...compiling stm32f1xx_hal_rcc.c...compiling stm32f1xx_hal_rcc_ex.c...compiling stm32f1xx_hal_gpio.c...compiling stm32f1xx_hal_dma.c...compiling stm32f1xx_hal_cortex.c...compiling stm32f1xx_hal_pwr.c...compiling stm32f1xx_hal_flash.c...compiling stm32f1xx_hal_flash_ex.c...compiling stm32f1xx_hal_exti.c...compiling stm32f1xx_hal_uart.c...assembling startup_stm32f10x_md.s...compiling system_stm32f10x.c...linking....\STM32F103C8x\STM32F103C8x.axf: Error: L6218E: Undefined symbol APBPrescTable (referred from stm32f1xx_hal_rcc.o).Not enough information to list image symbols.Finished: 1 information 0 warning and 1 error messages.".\STM32F103C8x\STM32F103C8x.axf" - 1 Error(s) 2 Warning(s).Target not created.Build Time Elapsed: 00:00:28
相对应代码如下：
stm32f1xx_hal_rcc.c
53 extern const uint8_t APBPrescTable[8U]; /@@*!< APB prescalers table values */
1190 return (HAL_RCC_GetHCLKFreq() >> APBPrescTable[(RCC->CFGR & RCC_CFGR_PPRE1) >> RCC_CFGR_PPRE1_Pos]);
1202 return (HAL_RCC_GetHCLKFreq() >> APBPrescTable[(RCC->CFGR & RCC_CFGR_PPRE2) >> RCC_CFGR_PPRE2_Pos]);
