title: Timestamp for phony target
body: <p>How can I add a timestamp in makefile for <code>.PHONY</code> targets</p>
  
  <pre><code>phony_Target:Real_Target .phony_Target_Token_File
      $(shell run_some_commands)
      touch .phony_Target_Token_File
  </code></pre>
  
  <p>This is the best that I could come up with. But it breaks-down when <code>.phony_Target_Token_File</code> does not exists (Since this is viewed as an unmet prerequisite).</p>
  
  <p>Does there exist a smarter way to do it?</p>