使用arm-none-eabi-gcc编译cubemx生成的项目没有程序跳到uart_init是为什么

使用arm-none-eabi-gcc编译cubemx 生成的项目。 发现没有程序没有跳到uart_init

void rt_hw_board_init(void)
{
    extern void SystemClock_Config(void);
    HAL_Init();
    SystemClock_Config();
    SystemCoreClockUpdate();
    /*
     * 1: OS tick Configuration
     * Enable the hardware timer and call the rt_os_tick_callback function
     * periodically with the frequency RT_TICK_PER_SECOND.
     */
    HAL_SYSTICK_Config(HAL_RCC_GetHCLKFreq()/RT_TICK_PER_SECOND);
    /* Call components board initial (use INIT_BOARD_EXPORT()) */
#ifdef RT_USING_COMPONENTS_INIT
    rt_components_board_init();
#endif
#if defined(RT_USING_USER_MAIN) && defined(RT_USING_HEAP)
    rt_system_heap_init(rt_heap_begin_get(), rt_heap_end_get());
#endif
}
#ifdef RT_USING_CONSOLE
static UART_HandleTypeDef UartHandle;
static int uart_init(void)
{
    /* TODO: Please modify the UART port number according to your needs */
    UartHandle.Instance = USART3;
    UartHandle.Init.BaudRate = 115200;
    UartHandle.Init.WordLength = UART_WORDLENGTH_8B;
    UartHandle.Init.StopBits = UART_STOPBITS_1;
    UartHandle.Init.Parity = UART_PARITY_NONE;
    UartHandle.Init.Mode = UART_MODE_TX_RX;
    UartHandle.Init.HwFlowCtl = UART_HWCONTROL_NONE;
    UartHandle.Init.OverSampling = UART_OVERSAMPLING_16;
    if (HAL_UART_Init(&UartHandle) != HAL_OK)
    {
        while (1);
    }
    return 0;
}
INIT_BOARD_EXPORT(uart_init);