title: Scons: run a make command as a dependency for a target
body: <p>I have a library that needs to by built as a dependency for my target.  The library is distributed with a Makefile and there's nothing special needed to build it other than to run:</p>
  
  <pre><code>make my_target
  </code></pre>
  
  <p>How would I run this command as part of my SConstruct file if my file looks something like:</p>
  
  <pre><code>env = Environment()
  flags = env.ParseFlags( CCFLAGS + LDFLAGS )
  env.MergeFlags( flags )
  env.Program( target = 'my_prog', source = SRC )
  </code></pre>