打印文件和行號
printf("%s(%d): "##fmt, __FILE__, __LINE__, ##__VA_ARGS__)
printf("-------%s(%d)--------\n"__FILE__, __LINE__);
fastboot/common/main.c:126:
printf(CONFIG_AUTOBOOT_PROMPT);
fastboot/include/configs/s40.h:453:# define CONFIG_AUTOBOOT_PROMPT "Press Ctrl+C to stop autoboot\n"
