title: How to detect if 64 bit MSVC with cmake?
body: <p>I have a project which uses cmake, one target is set to only build with MSVC:</p>
  
  <pre><code> if (MSVC)
       add_library(test SHARED source.cpp) 
   endif()
  </code></pre>
  
  <p>Now the other issue is that this target is only designed for MSVC 32bit. So how can I detect that the generator is MSVC64 and skip this target?</p>