3.1.2 make Command

The make command can be invoked with no arguments, simply:

demo% make

The make utility looks for a file named makefile or Makefile in the current directory and takes its instructions from that file.

The make utility:

• Reads makefile to determine all the target files it must process, the files they depend on, and the commands needed to build them.

• Finds the date and time each file was last changed.

• Rebuilds any target file that is older than any of the files it depends on, using the commands from makefile for that target.