title: Performing greater-than less-than calculations in a Makefile
body: <p>I'm trying to do this in a Makefile:</p>
  
  <pre><code>value = 2.0
  
  if ${greaterthan ${value}, 1.50}
  -&gt; execute a rule
  elseif ${lessthan ${value}, 0.50}
  -&gt; execute a rule
  endif
  </code></pre>
  
  <p>It seems like quite a common thing to want to do. What's the best way of doing this?</p>