What is makefile and how to use it.

A Makefile is a special file used in Unix and Unix-like operating systems to automate the building and compilation of programs or projects. It contains a set of rules and dependencies that specify how to build a target, typically an executable program or a collection of files.

.SILENT:

all: first second last

# .DEFAULT_GOAL:= last

first:

    echo "hello world"

second:

    echo "hello Gaurav"

last:

    echo "hello world Gaurav"

 

Refer here for more details