How to define rules in the Makefile to compile only that *.cpp files which was modified (and their dependencies), not all *.cpp files

Question

Lets say I have files:

Libs:

• one.cpp, one.h
• two.cpp, two.h
• three.cpp, three.h

Program:

• program.cpp

Answer 1

Add the files a command depends upon to run to the right of the target name.

Example:

default: hello.c
   gcc -o hello.bin hello.c

install: hello.bin
   cp hello.bin ../