ipc.pp missing sem.h constants for Mac OS-X Darwin

[rphoover]

Is there a reason that the following constants in "fpcsrc/packages/rtl-extra/src/unix/ipc.pp" are not included for Darwin?  The same definitions are  defined in Yosemite at /usr/include/sys/sem.h.  Both SEM_GETVAL and SEM_SETVAL are used by ibx.
{$if not defined(aix) and not defined(darwin)}
  SEM_GETNCNT = 3;   { Return the value of sempid (READ)  }
  SEM_GETPID  = 4;   { Return the value of semval (READ)  }
  SEM_GETVAL  = 5;   { Return semvals into arg.array (READ)  }
  SEM_GETALL  = 6;   { Return the value of semzcnt (READ)  }
  SEM_GETZCNT = 7;   { Set the value of semval to arg.val (ALTER)  }
  SEM_SETVAL  = 8;   { Set semvals from arg.array (ALTER)  }
  SEM_SETALL  = 9;
{$endif}

[Jonas Maebe]

http://bugs.freepascal.org/view.php?id=29495