Your program contains 3 files: info.h, info.c, main.c. You also added a correct makefile. if you did some changes on the file main.c only after the first execution of command (make). What is the output of executing the command (make) again gcc-cintos gcc-c main.c gee into.o main.o -o project gcc-c mainc gcc infoo maina -o project goc-c mainc gcc info.o main.o -o project