title: Is there a possibility in jenkins to run build only if something changed (in ClearCase SCM) from last build?
body: <p>I need to build in jenkins only if there has been any change in ClearCase stream. I want to check it also in nightly or when someone choose to build manually, and to stop the build completely if there are no changes.</p>
  
  <p>I tried the poll SCM but it doesn't seem to work well...</p>
  
  <p>Any suggestion?</p>