title: Makefile: is it possible to have stem with slash?
body: <p>I have these files:</p>
  
  <pre><code> tests/prova.txt
   tests/mydir/prova.txt
  </code></pre>
  
  <p>In my <strong>Makefile</strong> I have a target like that for printing file paths (it's just an example):</p>
  
  <pre><code>checkf-%:
      echo tests/${@:checkf-%=%}.txt
  </code></pre>
  
  <p>If I call </p>
  
  <pre><code>make checkf-prova
  </code></pre>
  
  <p>it works!
  But if I call </p>
  
  <pre><code>make checkf-mydir/prova
  </code></pre>
  
  <p>I get</p>
  
  <p><strong>make: No rule to make target</strong></p>
  
  <p>How can I call the target with a slash in % ?</p>