    __format__         49 libutil/die.h  	__attribute__ ((__noreturn__, __format__ (__printf__, 1, 2)));
    __format__         51 libutil/die.h  	__attribute__ ((__noreturn__, __format__ (__printf__, 2, 3)));
    __format__         53 libutil/die.h  	__attribute__ ((__format__ (__printf__, 1, 2)));
    __format__         55 libutil/die.h  	__attribute__ ((__format__ (__printf__, 1, 2)));
    __format__        128 libutil/strbuf.h 	__attribute__ ((__format__ (__printf__, 2, 3)));