title: Attach library .h to makefile
body: <p>I would like to add library wiringPi.h to my Makefile in cmake, but cmake doesn't see this header.</p>
  
  <pre><code>cmake_minimum_required(VERSION 2.8)
  project( program )
  include_directories(include)
  find_package( OpenCV REQUIRED )
  add_executable( program program.cpp )
  target_link_libraries( program ${OpenCV_LIBS} ) 
  </code></pre>
  
  <p>The project organization is:</p>
  
  <p>|-- CMakeLists.txt<br>
  |<br>
  |-- program.cpp<br>
  |<br>
  |-- wiringPi.h</p>
  
  <p>How should I add this header to Makefile?</p>