title: How to make CMake find google protobuf on windows?
body: <p>I am using Google Protobuf with CMake. On Linux the Protobuf library is found by:</p>
  
  <pre><code>find_package( Protobuf REQUIRED ) 
  </code></pre>
  
  <p>CMake knows where to look for the library. How though do I get this to work in Windows? Is there an environment variable I should create, such as <code>PROTOBUF_LIB</code>? I have looked in <code>FindProtobuf.cmake</code> but cannot work out what is required.</p>