title: CMake + Qt Creator: Add header files to project files
body: <p>If I have <code>.h</code> and <code>.cpp</code> files in the directory <code>src</code>, where the <code>.cpp</code> files include the <code>.h</code> files, using these commands in CMake:</p>
  
  <pre><code>aux_source_directory(src SRC_LIST)
  add_executable(${PROJECT_NAME} ${SRC_LIST})
  </code></pre>
  
  <p>And opening that CMake file in Qt Creator, gets all the files (sources + headers) in the list of project files (the file tree on the left by default).</p>
  
  <p>Now, on the other hand, if I put all the <code>.h</code> files in a directory <code>include</code>, and use this:</p>
  
  <pre><code>include_directories(include)
  aux_source_directory(src SRC_LIST)
  add_executable(${PROJECT_NAME} ${SRC_LIST})
  </code></pre>
  
  <p>The header files disappear from the project files!</p>
  
  <p>How can I keep the header files in that directory, and still have them listed in Qt Creator's project files?</p>