STM32L1 : correct compilation warnings

jeromecoutant · jeromecoutant · commit e7c412055077 · 2018-04-12T10:55:16.000+02:00
diff --git a/targets/TARGET_STM/TARGET_STM32L1/serial_device.c b/targets/TARGET_STM/TARGET_STM32L1/serial_device.c
@@ -40,7 +40,7 @@ UART_HandleTypeDef uart_handlers[UART_NUM];
 static uart_irq_handler irq_handler;
 
 // Defined in serial_api.c
-inline int8_t get_uart_index(UARTName uart_name);
+extern int8_t get_uart_index(UARTName uart_name);
 
 /******************************************************************************
  * INTERRUPTS HANDLING
