title: CMake setting to Ninja rebuild when header change?
body: <p>Apparently, Ninja has to be configured to treat headers as dependencies: <a href="https://ninja-build.org/manual.html#ref_headers" rel="nofollow">https://ninja-build.org/manual.html#ref_headers</a>.</p>
  
  <p>How do I tell CMake to generate this into my build.ninja?</p>