関連ワード:  implicit declaration of built in function printf    incompatible implicit declaration of built in function printf    incompatible implicit declaration of built in function printf enabled by default    incompatible implicit declaration of built in function printf stm32    warning incompatible implicit declaration of built in function printf    warning incompatible implicit declaration of built in function printf enabled by default    incompatible implicit declaration of built in function exit    incompatible implicit declaration of built in function exit enabled by default    incompatible implicit declaration of built-in function 'printf' -builtin-declaration-mismatch    warning incompatible implicit declaration of built-in function exit  
結果 : implicit declaration of built in function printf