Specifies that the external name used in cDEC$ ALIAS or cDEC$
  ATTRIBUTES ALIAS should have the prefix and postfix decorations
  performed on it that are associated with the calling mechanism that
  is in effect.  These are the same decorations performed on the
  procedure name when ALIAS is not specified.

  The case of the external name is not modified.

  If ALIAS is not specified, this property has no effect.