title: Check if a ccache call was a cache hit
body: <p>As part of my build process, I'd like to get statistics on the build time and whether ccache found the item in the cache. I know about <code>ccache -s</code> where I can compare the previous and current cache hit counts.</p>
  
  <p>However, if I have hundreds of compilation threads running in parallel, the statistics don't tell me which file caused the hit.</p>
  
  <p>The return code of <code>ccache</code> is that of the compiler. Is there any way I can get ccache to tell me if it was successful?</p>