title: Where does the CLion IDE look for header files?
body: <p>I'm using the CLion IDE and need to put some OpenGL files in. In the JetBrains/CLion folder there's a bin and lib folder. In the lib folder theres jar files, do I put the header and dlls in here?</p>
  
  <p>get this error:</p>
  
  <pre><code>CMakeFiles\GL.dir/objects.a(main.cpp.obj): In function `glutInit_ATEXIT_HACK':
  c:/mingw/include/gl/glut.h:486: undefined reference to `__glutInitWithExit'
  CMakeFiles\GL.dir/objects.a(main.cpp.obj): In function `glutCreateWindow_ATEXIT_HACK':
  c:/mingw/include/gl/glut.h:503: undefined reference to `__glutCreateWindowWithExit'
  CMakeFiles\GL.dir/objects.a(main.cpp.obj): In function `glutCreateMenu_ATEXIT_HACK':
  c:/mingw/include/gl/glut.h:549: undefined reference to `__glutCreateMenuWithExit'
  collect2.exe: error: ld returned 1 exit status
  CMakeFiles\GL.dir\build.make:86: recipe for target 'GL.exe' failed
  mingw32-make.exe[3]: *** [GL.exe] Error 1
  CMakeFiles\Makefile2:59: recipe for target 'CMakeFiles/GL.dir/all' failed
  CMakeFiles\Makefile2:71: recipe for target 'CMakeFiles/GL.dir/rule' failed
  mingw32-make.exe[2]: *** [CMakeFiles/GL.dir/all] Error 2
  mingw32-make.exe[1]: *** [CMakeFiles/GL.dir/rule] Error 2
  Makefile:109: recipe for target 'GL' failed
  mingw32-make.exe: *** [GL] Error 2
  </code></pre>