title: sample make file for creating more than one exe files with different directory
body: <p>I am having a directory called test where make file should be. i am having subdirectory called sub1, sub2, sub3.</p>
  <blockquote>
  <p>test/Makefile</p>
  <p>test/sub1</p>
  <p>test/sub2</p>
  <p>test/sub3</p>
  </blockquote>
  <p>I want to create exe1 by compiling sub1, exe2 by compiling sub2 and exe3 from sub3.</p>
  <p>Can i add more than one directory in vpath?? or any other solution</p>