Make-the purpose of the make utility is to determine automatically which pieces of a large program need to be recompiled, and issue the commands to recompile them. example c programs, since they are most common, but you can use make with any programming language whose compiler can be run with a shell command. in fact, make is not limited to programs. you can use it to describe any task where some files must be updated automatically from others whenever the others change. to prepare to use make, you must write a file called the makefile that describes the relationships among files in your program, and the states the commands for updating each file. in a program,typically the executable file is updated from object files, which are in turn made by compiling source files. so, make command compile the source code.