title: how to change directories from makefile and execute subdirectories make file?
body: <p>suppose A has two sub directories B and C where each subdirectories has their own make file.The parent A has its own make file.To call the child directories I have to use the below command in the parent makefile :</p>
  
  <pre><code>subB:
     cd B &amp;&amp; make
  subC:
     cd c &amp;&amp; make
  </code></pre>
  
  <p>Is there a generalized way of calling child directories makefile with a single statement.Beacause in future more 50 to 60 folders may be added.What is the generalized way of writing it</p>