title: Qsub parallel dependencies of a target in a makefile
body: <p>Consider a makefile </p>
  
  <pre><code>all : a c
      (cmd3)
  a : b1 b2 b3 b4
      (cmd2)
  b% : 
      (cmd) $*
  </code></pre>
  
  <p>Consider that the dependencies b% can be parallelized and run on grid engine. 
  What would be the simplest way to qsub these dependencies with minimal changes to the makefile  so that cmd2 is executed only after all the dependencies are satisfied ? </p>