/NOWARNINGS

  Controls whether the compiler generates diagnostic  messages  in
  response  to  warning-level  or  informational-level  errors.  A
  warning  message  indicates  that  the  compiler  has   detected
  acceptable  but  unorthodox syntax or that it has performed some
  corrective action.   In  either  case,  unexpected  results  may
  occur.

  By default, /WARNING is enabled; use the  /NOWARNINGS  qualifier
  to suppress informational messages.