title: Turning on linker flags with CMake
body: <p>When generating VS2010 targets with CMake, I would like the /LTCG flag turned on (only for release + releasewithdebinfo if possible, but its okay if its on for debug builds). How do I modify the linker flags? <code>add_definitions()</code> doesn't work because that only modifies compiler flags. And yes, I have wrapped it in if(MSVC).</p>
  
  <p>How do I modify the linker flags?</p>