Support for Ada on aarch64 with -mabi=ilp32

	PR ada/80117
	* system-linux-aarch64-ilp32.ads: New file.
	* gcc-interface/Makefile.in (LIBGNAT_TARGET_PAIRS_COMMON): Rename
	from LIBGNAT_TARGET_PAIRS.
	(LIBGNAT_TARGET_PAIRS_32, LIBGNAT_TARGET_PAIRS_64): Define.
	(LIBGNAT_TARGET_PAIRS): Use LIBGNAT_TARGET_PAIRS_COMMON, and
	LIBGNAT_TARGET_PAIRS_64 or LIBGNAT_TARGET_PAIRS_32 for -mabi=lp64
	or -mabi=ilp32, resp.

From-SVN: r246528

gcc/ada/ChangeLog

+2017-03-28  Andreas Schwab  <schwab@suse.de>
+
+	PR ada/80117
+	* system-linux-aarch64-ilp32.ads: New file.
+	* gcc-interface/Makefile.in (LIBGNAT_TARGET_PAIRS_COMMON): Rename
+	from LIBGNAT_TARGET_PAIRS.
+	(LIBGNAT_TARGET_PAIRS_32, LIBGNAT_TARGET_PAIRS_64): Define.
+	(LIBGNAT_TARGET_PAIRS): Use LIBGNAT_TARGET_PAIRS_COMMON, and
+	LIBGNAT_TARGET_PAIRS_64 or LIBGNAT_TARGET_PAIRS_32 for -mabi=lp64
+	or -mabi=ilp32, resp.
+
 2017-03-14  James Cowgill  <James.Cowgill@imgtec.com>
 
 	* s-osinte-linux.ads (struct_sigaction): Use correct type for sa_flags.

gcc/ada/gcc-interface/Makefile.in

@@ -1973,7 +1973,7 @@ endif
 
 # AArch64 Linux
 ifeq ($(strip $(filter-out aarch64% linux%,$(target_cpu) $(target_os))),)
-  LIBGNAT_TARGET_PAIRS = \
+  LIBGNAT_TARGET_PAIRS_COMMON = \
   a-exetim.adb<a-exetim-posix.adb \
   a-exetim.ads<a-exetim-default.ads \
   a-intnam.ads<a-intnam-linux.ads \
@@ -1993,9 +1993,22 @@ ifeq ($(strip $(filter-out aarch64% linux%,$(target_cpu) $(target_os))),)
   s-taspri.ads<s-taspri-posix.ads \
   g-sercom.adb<g-sercom-linux.adb \
   $(ATOMICS_TARGET_PAIRS) \
-  $(ATOMICS_BUILTINS_TARGET_PAIRS) \
+  $(ATOMICS_BUILTINS_TARGET_PAIRS)
+
+  LIBGNAT_TARGET_PAIRS_32 = \
+  system.ads<system-linux-aarch64-ilp32.ads
+
+  LIBGNAT_TARGET_PAIRS_64 = \
   system.ads<system-linux-arm.ads
 
+  ifneq (,$(or $(filter aarch64-linux-gnu, $(shell $(GCC_FOR_TARGET) $(GNATLIBCFLAGS) -print-multiarch)), $(filter ../lib64, $(shell $(GCC_FOR_TARGET) $(GNATLIBCFLAGS) -print-multi-os-directory))))
+    LIBGNAT_TARGET_PAIRS = \
+    $(LIBGNAT_TARGET_PAIRS_COMMON) $(LIBGNAT_TARGET_PAIRS_64)
+  else
+    LIBGNAT_TARGET_PAIRS = \
+    $(LIBGNAT_TARGET_PAIRS_COMMON) $(LIBGNAT_TARGET_PAIRS_32)
+  endif
+
   TOOLS_TARGET_PAIRS =  \
     mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
     indepsw.adb<indepsw-gnu.adb

gcc/ada/system-linux-aarch64-ilp32.ads

+------------------------------------------------------------------------------
+--                                                                          --
+--                        GNAT RUN-TIME COMPONENTS                          --
+--                                                                          --
+--                               S Y S T E M                                --
+--                                                                          --
+--                                 S p e c                                  --
+--                        (GNU-Linux/ARM Version)                           --
+--                                                                          --
+--          Copyright (C) 1992-2017, Free Software Foundation, Inc.         --
+--                                                                          --
+-- This specification is derived from the Ada Reference Manual for use with --
+-- GNAT. The copyright notice above, and the license provisions that follow --
+-- apply solely to the  contents of the part following the private keyword. --
+--                                                                          --
+-- 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- --
+-- ware  Foundation;  either version 3,  or (at your option) any later ver- --
+-- sion.  GNAT is distributed in the hope that it will be useful, but WITH- --
+-- OUT ANY WARRANTY;  without even the  implied warranty of MERCHANTABILITY --
+-- or FITNESS FOR A PARTICULAR PURPOSE.                                     --
+--                                                                          --
+-- As a special exception under Section 7 of GPL version 3, you are granted --
+-- additional permissions described in the GCC Runtime Library Exception,   --
+-- version 3.1, as published by the Free Software Foundation.               --
+--                                                                          --
+-- You should have received a copy of the GNU General Public License and    --
+-- a copy of the GCC Runtime Library Exception along with this program;     --
+-- see the files COPYING3 and COPYING.RUNTIME respectively.  If not, see    --
+-- <http://www.gnu.org/licenses/>.                                          --
+--                                                                          --
+-- GNAT was originally developed  by the GNAT team at  New York University. --
+-- Extensive contributions were provided by Ada Core Technologies Inc.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+package System is
+   pragma Pure;
+   --  Note that we take advantage of the implementation permission to make
+   --  this unit Pure instead of Preelaborable; see RM 13.7.1(15). In Ada
+   --  2005, this is Pure in any case (AI-362).
+
+   pragma No_Elaboration_Code_All;
+   --  Allow the use of that restriction in units that WITH this unit
+
+   type Name is (SYSTEM_NAME_GNAT);
+   System_Name : constant Name := SYSTEM_NAME_GNAT;
+
+   --  System-Dependent Named Numbers
+
+   Min_Int               : constant := Long_Long_Integer'First;
+   Max_Int               : constant := Long_Long_Integer'Last;
+
+   Max_Binary_Modulus    : constant := 2 ** Long_Long_Integer'Size;
+   Max_Nonbinary_Modulus : constant := 2 ** Integer'Size - 1;
+
+   Max_Base_Digits       : constant := Long_Long_Float'Digits;
+   Max_Digits            : constant := Long_Long_Float'Digits;
+
+   Max_Mantissa          : constant := 63;
+   Fine_Delta            : constant := 2.0 ** (-Max_Mantissa);
+
+   Tick                  : constant := 0.000_001;
+
+   --  Storage-related Declarations
+
+   type Address is private;
+   pragma Preelaborable_Initialization (Address);
+   Null_Address : constant Address;
+
+   Storage_Unit : constant := 8;
+   Word_Size    : constant := 32;
+   Memory_Size  : constant := 2 ** Word_Size;
+
+   --  Address comparison
+
+   function "<"  (Left, Right : Address) return Boolean;
+   function "<=" (Left, Right : Address) return Boolean;
+   function ">"  (Left, Right : Address) return Boolean;
+   function ">=" (Left, Right : Address) return Boolean;
+   function "="  (Left, Right : Address) return Boolean;
+
+   pragma Import (Intrinsic, "<");
+   pragma Import (Intrinsic, "<=");
+   pragma Import (Intrinsic, ">");
+   pragma Import (Intrinsic, ">=");
+   pragma Import (Intrinsic, "=");
+
+   --  Other System-Dependent Declarations
+
+   type Bit_Order is (High_Order_First, Low_Order_First);
+   Default_Bit_Order : constant Bit_Order :=
+                         Bit_Order'Val (Standard'Default_Bit_Order);
+   pragma Warnings (Off, Default_Bit_Order); -- kill constant condition warning
+
+   --  Priority-related Declarations (RM D.1)
+
+   --  0 .. 98 corresponds to the system priority range 1 .. 99.
+   --
+   --  If the scheduling policy is SCHED_FIFO or SCHED_RR the runtime makes use
+   --  of the entire range provided by the system.
+   --
+   --  If the scheduling policy is SCHED_OTHER the only valid system priority
+   --  is 1 and other values are simply ignored.
+
+   Max_Priority           : constant Positive := 97;
+   Max_Interrupt_Priority : constant Positive := 98;
+
+   subtype Any_Priority       is Integer      range  0 .. 98;
+   subtype Priority           is Any_Priority range  0 .. 97;
+   subtype Interrupt_Priority is Any_Priority range 98 .. 98;
+
+   Default_Priority : constant Priority := 48;
+
+private
+
+   type Address is mod Memory_Size;
+   Null_Address : constant Address := 0;
+
+   --------------------------------------
+   -- System Implementation Parameters --
+   --------------------------------------
+
+   --  These parameters provide information about the target that is used
+   --  by the compiler. They are in the private part of System, where they
+   --  can be accessed using the special circuitry in the Targparm unit
+   --  whose source should be consulted for more detailed descriptions
+   --  of the individual switch values.
+
+   Backend_Divide_Checks     : constant Boolean := False;
+   Backend_Overflow_Checks   : constant Boolean := True;
+   Command_Line_Args         : constant Boolean := True;
+   Configurable_Run_Time     : constant Boolean := False;
+   Denorm                    : constant Boolean := True;
+   Duration_32_Bits          : constant Boolean := False;
+   Exit_Status_Supported     : constant Boolean := True;
+   Fractional_Fixed_Ops      : constant Boolean := False;
+   Frontend_Layout           : constant Boolean := False;
+   Machine_Overflows         : constant Boolean := False;
+   Machine_Rounds            : constant Boolean := True;
+   Preallocated_Stacks       : constant Boolean := False;
+   Signed_Zeros              : constant Boolean := True;
+   Stack_Check_Default       : constant Boolean := False;
+   Stack_Check_Probes        : constant Boolean := True;
+   Stack_Check_Limits        : constant Boolean := False;
+   Support_Aggregates        : constant Boolean := True;
+   Support_Atomic_Primitives : constant Boolean := True;
+   Support_Composite_Assign  : constant Boolean := True;
+   Support_Composite_Compare : constant Boolean := True;
+   Support_Long_Shifts       : constant Boolean := True;
+   Always_Compatible_Rep     : constant Boolean := False;
+   Suppress_Standard_Library : constant Boolean := False;
+   Use_Ada_Main_Program_Name : constant Boolean := False;
+   Frontend_Exceptions       : constant Boolean := False;
+   ZCX_By_Default            : constant Boolean := True;
+
+end System;