title: set cmake output executable directory
body: <p>I want to set the output executable using cmake. I've achieved this by using these:</p>
  <pre><code>SET( EXECUTABLE_OUTPUT_PATH ${dir}/bin )
  set( CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/bin )
  </code></pre>
  <p>But the problem is now everything is set inside <code>/bin</code> including the binaries of all the libraries used in the project. I only want the executable created by my project to be inside <code>/bin</code>. How can I achieve this?</p>