[Ada] Allow System.Multiprocessors[.Dispatching_Domains] in Ada 95

Index: gnat_rm.texi
===================================================================
--- gnat_rm.texi	(revision 197897)
+++ gnat_rm.texi	(working copy)
@@ -548,6 +548,8 @@ 
 * System.Address_Image (s-addima.ads)::
 * System.Assertions (s-assert.ads)::
 * System.Memory (s-memory.ads)::
+* System.Multiprocessors (s-multip.ads)::
+* System.Multiprocessors.Dispatching_Domains (s-mudido.ads)::
 * System.Partition_Interface (s-parint.ads)::
 * System.Pool_Global (s-pooglo.ads)::
 * System.Pool_Local (s-pooloc.ads)::
@@ -15508,6 +15510,8 @@ 
 * System.Address_Image (s-addima.ads)::
 * System.Assertions (s-assert.ads)::
 * System.Memory (s-memory.ads)::
+* System.Multiprocessors (s-multip.ads)::
+* System.Multiprocessors.Dispatching_Domains (s-mudido.ads)::
 * System.Partition_Interface (s-parint.ads)::
 * System.Pool_Global (s-pooglo.ads)::
 * System.Pool_Local (s-pooloc.ads)::
@@ -16970,6 +16974,22 @@ 
 calls to this unit may be made for low level allocation uses (for
 example see the body of @code{GNAT.Tables}).
 
+@node System.Multiprocessors (s-multip.ads)
+@section @code{System.Multiprocessors} (@file{s-multip.ads})
+@cindex @code{System.Multiprocessors} (@file{s-multip.ads})
+@cindex Multiprocessor interface
+This is an Ada 2012 unit defined in the Ada 2012 Reference Manual, but
+in GNAT we also make it available in Ada 95 and Ada 2005 (where it is
+technically an implementation-defined addition).
+
+@node System.Multiprocessors.Dispatching_Domains (s-mudido.ads)
+@section @code{System.Multiprocessors.Dispatching_Domains} (@file{s-mudido.ads})
+@cindex @code{System.Multiprocessors.Dispatching_Domains} (@file{s-mudido.ads})
+@cindex Multiprocessor interface
+This is an Ada 2012 unit defined in the Ada 2012 Reference Manual, but
+in GNAT we also make it available in Ada 95 and Ada 2005 (where it is
+technically an implementation-defined addition).
+
 @node System.Partition_Interface (s-parint.ads)
 @section @code{System.Partition_Interface} (@file{s-parint.ads})
 @cindex @code{System.Partition_Interface} (@file{s-parint.ads})
Index: impunit.adb
===================================================================
--- impunit.adb	(revision 197897)
+++ impunit.adb	(working copy)
@@ -6,7 +6,7 @@ 
 --                                                                          --
 --                                 B o d y                                  --
 --                                                                          --
---           Copyright (C) 2000-2012, Free Software Foundation, Inc.        --
+--           Copyright (C) 2000-2013, Free Software Foundation, Inc.        --
 --                                                                          --
 -- GNAT is free software;  you can  redistribute it  and/or modify it under --
 -- terms of the  GNU General Public License as published  by the Free Soft- --
@@ -380,8 +380,15 @@ 
     ("s-ststop", F),  -- System.Strings.Stream_Ops
     ("s-tasinf", F),  -- System.Task_Info
     ("s-wchcnv", F),  -- System.Wch_Cnv
-    ("s-wchcon", F)); -- System.Wch_Con
+    ("s-wchcon", F),  -- System.Wch_Con
 
+   --  The following are strictly speaking Ada 2012 units, but we are allowed
+   --  to add children to system, so we consider them to be implementation
+   --  defined additions to System in earlier versions of Ada.
+
+    ("s-multip", T),  -- System.Multiprocessors
+    ("s-mudido", T)); -- System.Multiprocessors.Dispatching_Domains
+
    --------------------
    -- Ada 2005 Units --
    --------------------
@@ -544,8 +551,6 @@ 
    --  The following units should be used only in Ada 2012 mode
 
    Non_Imp_File_Names_12 : constant File_List := (
-    ("s-multip", T),  -- System.Multiprocessors
-    ("s-mudido", T),  -- System.Multiprocessors.Dispatching_Domains
     ("s-stposu", T),  -- System.Storage_Pools.Subpools
     ("a-cobove", T),  -- Ada.Containers.Bounded_Vectors
     ("a-cbdlli", T),  -- Ada.Containers.Bounded_Doubly_Linked_Lists