Original author: jpho
CMake prefers Win8-SDK for Direct3D headers. This is a problem as the Direct3D9 RenderSystem uses some DX features and headers not included in the Win8 SDK.
See discussion here: http://www.ogre3d.org/forums/viewtopic.php?f=4&t=69209&p=475592#p475592
A possible solution was proposed my Wolfmanfx here:
Original Mantis Ticket: http://www.ogre3d.org/mantis/view.php?id=589