/SEVERITY=(WARNINGS=opt) D=/SEVERITY=(WARNINGS=WARNING)

 Changes the severity of warning or error messages.

 The default is that compiler diagnostic warning messages and
 standards checking messages have a severity of warning, or
 /SEVERITY=(WARNINGS=WARNING).


 ERROR
   Specifies that all warning messages are to be issued with ERROR
   severity.

 STDERROR
   Specifies that if /STANDARD is in effect and diagnostics
   indicating non-standard features are issued, the diagnostics are
   issued with ERROR severity (the default is that these are
   informational).  All other warning messages are issued with
   WARNING severity.

 WARNINGS
   Specifies that all warning messages are to be issued with WARNING
   severity.