title: cmake for GNU Radio tutorial
body: <p>I was trying to follow a tutorial on building the signal processing block on the gnuradio website: <a href="http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules" rel="nofollow">http://gnuradio.org/redmine/projects/gnuradio/wiki/OutOfTreeModules</a>.</p>
  
  <p>However, when it comes to the step where it requires me to use CMake, the terminal is complaining that </p>
  
  <pre><code>package cppunit is not found  checking for module 'cppunit'
  --   package 'cppunit' not found
  -- Could NOT find CPPUNIT (missing:  CPPUNIT_INCLUDE_DIRS) 
  CMake Error at CMakeLists.txt:101 (message):
    CppUnit required to compile howto
  </code></pre>
  
  <p>I have tried command such as <code>sudo apt-get cppunit</code>.</p>