title: Cmake is installing something to /usr/local/include and /usr/lib instead of /usr/include
body: <p>i was reading this <a href="https://stackoverflow.com/questions/17768008/how-to-build-install-glfw-3-and-use-it-in-a-linux-project">How to build &amp; install GLFW 3 and use it in a Linux project</a> because i was having trouble installing glfw. when i ran "make install" this was the output. </p>
  
  <pre><code>blah blah blah build target [100%]
  -- Install configuration: ""
  -- Installing: /usr/local/include/GLFW
  -- Installing: /usr/local/include/GLFW/glfw3.h
  -- Installing: /usr/local/include/GLFW/glfw3native.h
  -- Installing: /usr/local/lib/cmake/glfw3/glfw3Config.cmake
  -- Installing: /usr/local/lib/cmake/glfw3/glfw3ConfigVersion.cmake
  -- Installing: /usr/local/lib/cmake/glfw3/glfw3Targets.cmake
  -- Installing: /usr/local/lib/cmake/glfw3/glfw3Targets-noconfig.cmake
  -- Installing: /usr/local/lib/pkgconfig/glfw3.pc
  -- Installing: /usr/local/lib/libglfw3.a
  </code></pre>
  
  <p>how do i install it in /usr/include instead?</p>