title: Can we include another Makefile in a GNU Makefile by using the relative path?
body: <p>I have a Makefile in:</p>
  
  <pre><code>project/all_app/myapp/src/Makefile
  </code></pre>
  
  <p>I also have a master Depend.mk in </p>
  
  <pre><code>project/Depend.mk
  </code></pre>
  
  <p>Can I include the main Makefile by using the relative path?</p>
  
  <pre><code>include ../../../../Depend.mk
  </code></pre>