[Ada] Declare time_t uniformly based on a system parameter

gcc/ada/

	* Makefile.rtl: Add translations for s-parame__posix2008.ads
	* libgnarl/s-linux.ads: Import System.Parameters.
	(time_t): Declare using System.Parameters.time_t_bits.
	* libgnarl/s-linux__alpha.ads: Likewise.
	* libgnarl/s-linux__android.ads: Likewise.
	* libgnarl/s-linux__hppa.ads: Likewise.
	* libgnarl/s-linux__mips.ads: Likewise.
	* libgnarl/s-linux__riscv.ads: Likewise.
	* libgnarl/s-linux__sparc.ads: Likewise.
	* libgnarl/s-linux__x32.ads: Likewise.
	* libgnarl/s-qnx.ads: Likewise.
	* libgnarl/s-osinte__aix.ads: Likewise.
	* libgnarl/s-osinte__android.ads: Likewise.
	* libgnarl/s-osinte__darwin.ads: Likewise.
	* libgnarl/s-osinte__dragonfly.ads: Likewise.
	* libgnarl/s-osinte__freebsd.ads: Likewise.
	* libgnarl/s-osinte__gnu.ads: Likewise.
	* libgnarl/s-osinte__hpux-dce.ads: Likewise.
	* libgnarl/s-osinte__hpux.ads: Likewise.
	* libgnarl/s-osinte__kfreebsd-gnu.ads: Likewise.
	* libgnarl/s-osinte__lynxos178e.ads: Likewise.
	* libgnarl/s-osinte__qnx.ads: Likewise.
	* libgnarl/s-osinte__rtems.ads: Likewise.
	* libgnarl/s-osinte__solaris.ads: Likewise.
	* libgnarl/s-osinte__vxworks.ads: Likewise.
	* libgnat/g-sothco.ads: Likewise.
	* libgnat/s-osprim__darwin.adb: Likewise.
	* libgnat/s-osprim__posix.adb: Likewise.
	* libgnat/s-osprim__posix2008.adb: Likewise.
	* libgnat/s-osprim__rtems.adb: Likewise.
	* libgnat/s-osprim__x32.adb: Likewise.
	* libgnarl/s-osinte__linux.ads: use type System.Linux.time_t.
	* libgnat/s-os_lib.ads (time_t): Declare as subtype of
	Long_Long_Integer.
	* libgnat/s-parame.ads (time_t_bits): New constant.
	* libgnat/s-parame__ae653.ads (time_t_bits): Likewise.
	* libgnat/s-parame__hpux.ads (time_t_bits): Likewise.
	* libgnat/s-parame__vxworks.ads (time_t_bits): Likewise.
	* libgnat/s-parame__posix2008.ads: New file for 64 bit time_t.

37 files changed, 342 insertions, 33 deletions

diff --git a/gcc/ada/Makefile.rtl b/gcc/ada/Makefile.rtl
index 5475d0d..fb851a6 100644
--- a/gcc/ada/Makefile.rtl
+++ b/gcc/ada/Makefile.rtl
@@ -2162,6 +2162,7 @@ ifeq ($(strip $(filter-out lynxos178%,$(target_os))),)
 
   ifeq ($(strip $(filter-out lynxos178e,$(target_os))),)
     LIBGNAT_TARGET_PAIRS += \
+    s-parame.ads<libgnat/s-parame__posix2008.ads \
     s-osinte.ads<libgnarl/s-osinte__lynxos178e.ads \
     s-osprim.adb<libgnat/s-osprim__posix2008.adb \
     s-tracon.adb<hie/s-tracon__ppc-eabi.adb
@@ -2181,6 +2182,7 @@ ifeq ($(strip $(filter-out rtems%,$(target_os))),)
   s-osinte.ads<libgnarl/s-osinte__rtems.ads \
   s-osprim.adb<libgnat/s-osprim__rtems.adb \
   s-parame.adb<libgnat/s-parame__rtems.adb \
+  s-parame.ads<libgnat/s-parame__posix2008.ads \
   s-taprop.adb<libgnarl/s-taprop__posix.adb \
   s-taspri.ads<libgnarl/s-taspri__posix.ads \
   s-tpopsp.adb<libgnarl/s-tpopsp__tls.adb \
@@ -2760,6 +2762,7 @@ ifeq ($(strip $(filter-out %x32 linux%,$(target_cpu) $(target_os))),)
   s-osinte.ads<libgnarl/s-osinte__linux.ads \
   s-osinte.adb<libgnarl/s-osinte__x32.adb \
   s-osprim.adb<libgnat/s-osprim__x32.adb \
+  s-parame.ads<libgnat/s-parame__posix2008.ads \
   s-taprop.adb<libgnarl/s-taprop__linux.adb \
   s-tasinf.ads<libgnarl/s-tasinf__linux.ads \
   s-tasinf.adb<libgnarl/s-tasinf__linux.adb \
diff --git a/gcc/ada/libgnarl/s-linux.ads b/gcc/ada/libgnarl/s-linux.ads
index 16a28ac..2251f2d 100644
--- a/gcc/ada/libgnarl/s-linux.ads
+++ b/gcc/ada/libgnarl/s-linux.ads
@@ -36,6 +36,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
 
 with Interfaces.C;
+with System.Parameters;
 
 package System.Linux is
    pragma Preelaborate;
@@ -46,7 +47,8 @@ package System.Linux is
 
    subtype long        is Interfaces.C.long;
    subtype suseconds_t is Interfaces.C.long;
-   subtype time_t      is Interfaces.C.long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+        .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
diff --git a/gcc/ada/libgnarl/s-linux__alpha.ads b/gcc/ada/libgnarl/s-linux__alpha.ads
index cd9a62e..06b12f2 100644
--- a/gcc/ada/libgnarl/s-linux__alpha.ads
+++ b/gcc/ada/libgnarl/s-linux__alpha.ads
@@ -36,6 +36,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
 
 with Interfaces.C;
+with System.Parameters;
 
 package System.Linux is
    pragma Preelaborate;
@@ -46,7 +47,8 @@ package System.Linux is
 
    subtype long        is Interfaces.C.long;
    subtype suseconds_t is Interfaces.C.long;
-   subtype time_t      is Interfaces.C.long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
diff --git a/gcc/ada/libgnarl/s-linux__android.ads b/gcc/ada/libgnarl/s-linux__android.ads
index 5b23b73..d2b689e 100644
--- a/gcc/ada/libgnarl/s-linux__android.ads
+++ b/gcc/ada/libgnarl/s-linux__android.ads
@@ -36,6 +36,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
 
 with Interfaces.C;
+with System.Parameters;
 
 package System.Linux is
    pragma Preelaborate;
@@ -46,7 +47,8 @@ package System.Linux is
 
    subtype long        is Interfaces.C.long;
    subtype suseconds_t is Interfaces.C.long;
-   subtype time_t      is Interfaces.C.long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
diff --git a/gcc/ada/libgnarl/s-linux__hppa.ads b/gcc/ada/libgnarl/s-linux__hppa.ads
index 73815d2..03869df 100644
--- a/gcc/ada/libgnarl/s-linux__hppa.ads
+++ b/gcc/ada/libgnarl/s-linux__hppa.ads
@@ -36,6 +36,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package.
 
 with Interfaces.C;
+with System.Parameters;
 
 package System.Linux is
    pragma Preelaborate;
@@ -46,7 +47,8 @@ package System.Linux is
 
    subtype long        is Interfaces.C.long;
    subtype suseconds_t is Interfaces.C.long;
-   subtype time_t      is Interfaces.C.long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
diff --git a/gcc/ada/libgnarl/s-linux__mips.ads b/gcc/ada/libgnarl/s-linux__mips.ads
index f63640c..3660ee9 100644
--- a/gcc/ada/libgnarl/s-linux__mips.ads
+++ b/gcc/ada/libgnarl/s-linux__mips.ads
@@ -35,6 +35,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
 
 with Interfaces.C;
+with System.Parameters;
 
 package System.Linux is
    pragma Preelaborate;
@@ -46,7 +47,8 @@ package System.Linux is
    subtype int         is Interfaces.C.int;
    subtype long        is Interfaces.C.long;
    subtype suseconds_t is Interfaces.C.long;
-   subtype time_t      is Interfaces.C.long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
diff --git a/gcc/ada/libgnarl/s-linux__riscv.ads b/gcc/ada/libgnarl/s-linux__riscv.ads
index d8d0f63..e3f7cc3 100644
--- a/gcc/ada/libgnarl/s-linux__riscv.ads
+++ b/gcc/ada/libgnarl/s-linux__riscv.ads
@@ -35,6 +35,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
 
 with Interfaces.C;
+with System.Parameters;
 
 package System.Linux is
    pragma Preelaborate;
@@ -46,7 +47,8 @@ package System.Linux is
    subtype int         is Interfaces.C.int;
    subtype long        is Interfaces.C.long;
    subtype suseconds_t is Interfaces.C.long;
-   subtype time_t      is Interfaces.C.long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
diff --git a/gcc/ada/libgnarl/s-linux__sparc.ads b/gcc/ada/libgnarl/s-linux__sparc.ads
index 47850fe..102e9ff 100644
--- a/gcc/ada/libgnarl/s-linux__sparc.ads
+++ b/gcc/ada/libgnarl/s-linux__sparc.ads
@@ -36,6 +36,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
 
 with Interfaces.C;
+with System.Parameters;
 
 package System.Linux is
    pragma Preelaborate;
@@ -46,7 +47,8 @@ package System.Linux is
 
    subtype long        is Interfaces.C.long;
    subtype suseconds_t is Interfaces.C.long;
-   subtype time_t      is Interfaces.C.long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
diff --git a/gcc/ada/libgnarl/s-linux__x32.ads b/gcc/ada/libgnarl/s-linux__x32.ads
index 29b1c0c..3281235 100644
--- a/gcc/ada/libgnarl/s-linux__x32.ads
+++ b/gcc/ada/libgnarl/s-linux__x32.ads
@@ -38,6 +38,8 @@
 
 with Interfaces.C;
 
+with System.Parameters;
+
 package System.Linux is
    pragma Preelaborate;
 
@@ -46,12 +48,15 @@ package System.Linux is
    ----------
 
    subtype suseconds_t is Long_Long_Integer;
-   subtype time_t      is Long_Long_Integer;
+   --  Note that suseconds_t is 64 bits.
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
       tv_sec  : time_t;
       tv_nsec : Long_Long_Integer;
+      --  Note that tv_nsec is 64 bits.
    end record;
    pragma Convention (C, timespec);
 
diff --git a/gcc/ada/libgnarl/s-osinte__aix.ads b/gcc/ada/libgnarl/s-osinte__aix.ads
index 065876c..bab03d0 100644
--- a/gcc/ada/libgnarl/s-osinte__aix.ads
+++ b/gcc/ada/libgnarl/s-osinte__aix.ads
@@ -43,6 +43,8 @@ with Ada.Unchecked_Conversion;
 with Interfaces.C;
 with Interfaces.C.Extensions;
 
+with System.Parameters;
+
 package System.OS_Interface is
    pragma Preelaborate;
 
@@ -540,7 +542,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__android.ads b/gcc/ada/libgnarl/s-osinte__android.ads
index 56bd134..27f7d9d 100644
--- a/gcc/ada/libgnarl/s-osinte__android.ads
+++ b/gcc/ada/libgnarl/s-osinte__android.ads
@@ -42,6 +42,7 @@ with Ada.Unchecked_Conversion;
 with Interfaces.C;
 with System.Linux;
 with System.OS_Constants;
+with System.Parameters;
 
 package System.OS_Interface is
    pragma Preelaborate;
@@ -593,7 +594,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__darwin.ads b/gcc/ada/libgnarl/s-osinte__darwin.ads
index a58f520..ac41d528 100644
--- a/gcc/ada/libgnarl/s-osinte__darwin.ads
+++ b/gcc/ada/libgnarl/s-osinte__darwin.ads
@@ -40,6 +40,7 @@
 
 with Interfaces.C;
 with System.OS_Constants;
+with System.Parameters;
 
 package System.OS_Interface is
    pragma Preelaborate;
@@ -514,7 +515,8 @@ private
 
    type pid_t is new int32_t;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__dragonfly.ads b/gcc/ada/libgnarl/s-osinte__dragonfly.ads
index 5ac4792..515e1b3 100644
--- a/gcc/ada/libgnarl/s-osinte__dragonfly.ads
+++ b/gcc/ada/libgnarl/s-osinte__dragonfly.ads
@@ -43,6 +43,8 @@ with Ada.Unchecked_Conversion;
 
 with Interfaces.C;
 
+with System.Parameters;
+
 package System.OS_Interface is
    pragma Preelaborate;
 
@@ -633,7 +635,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       ts_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__freebsd.ads b/gcc/ada/libgnarl/s-osinte__freebsd.ads
index cbe8a6e..0dae1fb 100644
--- a/gcc/ada/libgnarl/s-osinte__freebsd.ads
+++ b/gcc/ada/libgnarl/s-osinte__freebsd.ads
@@ -43,6 +43,8 @@ with Ada.Unchecked_Conversion;
 
 with Interfaces.C;
 
+with System.Parameters;
+
 package System.OS_Interface is
    pragma Preelaborate;
 
@@ -630,7 +632,8 @@ private
    type pid_t is new int;
    Self_PID : constant pid_t := 0;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       ts_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__gnu.ads b/gcc/ada/libgnarl/s-osinte__gnu.ads
index 99ee175..98eef86 100644
--- a/gcc/ada/libgnarl/s-osinte__gnu.ads
+++ b/gcc/ada/libgnarl/s-osinte__gnu.ads
@@ -39,6 +39,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
 
 with Interfaces.C;
+with System.Parameters;
 with Unchecked_Conversion;
 
 package System.OS_Interface is
@@ -652,7 +653,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__hpux-dce.ads b/gcc/ada/libgnarl/s-osinte__hpux-dce.ads
index 8e04e63..ce8c5ab 100644
--- a/gcc/ada/libgnarl/s-osinte__hpux-dce.ads
+++ b/gcc/ada/libgnarl/s-osinte__hpux-dce.ads
@@ -42,6 +42,8 @@ with Ada.Unchecked_Conversion;
 
 with Interfaces.C;
 
+with System.Parameters;
+
 package System.OS_Interface is
    pragma Preelaborate;
 
@@ -444,7 +446,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__hpux.ads b/gcc/ada/libgnarl/s-osinte__hpux.ads
index c92fbda..c94b84c 100644
--- a/gcc/ada/libgnarl/s-osinte__hpux.ads
+++ b/gcc/ada/libgnarl/s-osinte__hpux.ads
@@ -42,6 +42,8 @@ with Ada.Unchecked_Conversion;
 
 with Interfaces.C;
 
+with System.Parameters;
+
 package System.OS_Interface is
    pragma Preelaborate;
 
@@ -514,7 +516,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__kfreebsd-gnu.ads b/gcc/ada/libgnarl/s-osinte__kfreebsd-gnu.ads
index 90e0116..de91ee8 100644
--- a/gcc/ada/libgnarl/s-osinte__kfreebsd-gnu.ads
+++ b/gcc/ada/libgnarl/s-osinte__kfreebsd-gnu.ads
@@ -39,6 +39,7 @@
 --  Preelaborate. This package is designed to be a bottom-level (leaf) package
 
 with Interfaces.C;
+with System.Parameters;
 with Unchecked_Conversion;
 
 package System.OS_Interface is
@@ -598,7 +599,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__linux.ads b/gcc/ada/libgnarl/s-osinte__linux.ads
index ca0bf1b..cda0f8e 100644
--- a/gcc/ada/libgnarl/s-osinte__linux.ads
+++ b/gcc/ada/libgnarl/s-osinte__linux.ads
@@ -51,6 +51,8 @@ package System.OS_Interface is
 
    pragma Linker_Options ("-lpthread");
 
+   use type System.Linux.time_t;
+
    subtype int            is Interfaces.C.int;
    subtype char           is Interfaces.C.char;
    subtype short          is Interfaces.C.short;
diff --git a/gcc/ada/libgnarl/s-osinte__lynxos178e.ads b/gcc/ada/libgnarl/s-osinte__lynxos178e.ads
index f2a866b..4f38a53 100644
--- a/gcc/ada/libgnarl/s-osinte__lynxos178e.ads
+++ b/gcc/ada/libgnarl/s-osinte__lynxos178e.ads
@@ -43,6 +43,7 @@ with Ada.Unchecked_Conversion;
 with Interfaces.C;
 
 with System.Multiprocessors;
+with System.Parameters;
 
 package System.OS_Interface is
    pragma Preelaborate;
@@ -539,7 +540,8 @@ private
 
    type pid_t is new long;
 
-   type time_t is new int64;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type suseconds_t is new int;
 
diff --git a/gcc/ada/libgnarl/s-osinte__qnx.ads b/gcc/ada/libgnarl/s-osinte__qnx.ads
index af326c4..28abfbe 100644
--- a/gcc/ada/libgnarl/s-osinte__qnx.ads
+++ b/gcc/ada/libgnarl/s-osinte__qnx.ads
@@ -40,6 +40,7 @@
 with Ada.Unchecked_Conversion;
 with Interfaces.C;
 with System.OS_Constants;
+with System.Parameters;
 
 package System.OS_Interface is
    pragma Preelaborate;
@@ -566,7 +567,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__rtems.ads b/gcc/ada/libgnarl/s-osinte__rtems.ads
index 6aae823..ffbfc3a 100644
--- a/gcc/ada/libgnarl/s-osinte__rtems.ads
+++ b/gcc/ada/libgnarl/s-osinte__rtems.ads
@@ -52,6 +52,7 @@
 
 with Interfaces.C;
 with System.OS_Constants;
+with System.Parameters;
 
 package System.OS_Interface is
    pragma Preelaborate;
@@ -617,7 +618,8 @@ private
 
    type pid_t is new int;
 
-   type time_t is new Long_Long_Integer;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__solaris.ads b/gcc/ada/libgnarl/s-osinte__solaris.ads
index b2f4af4..29e1026 100644
--- a/gcc/ada/libgnarl/s-osinte__solaris.ads
+++ b/gcc/ada/libgnarl/s-osinte__solaris.ads
@@ -42,6 +42,8 @@ with Interfaces.C;
 
 with Ada.Unchecked_Conversion;
 
+with System.Parameters;
+
 package System.OS_Interface is
    pragma Preelaborate;
 
@@ -523,7 +525,8 @@ private
 
    type pid_t is new long;
 
-   type time_t is new long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-osinte__vxworks.ads b/gcc/ada/libgnarl/s-osinte__vxworks.ads
index 5e30698..8b9c5bf 100644
--- a/gcc/ada/libgnarl/s-osinte__vxworks.ads
+++ b/gcc/ada/libgnarl/s-osinte__vxworks.ads
@@ -42,6 +42,7 @@ with Interfaces.C;
 with System.VxWorks;
 with System.VxWorks.Ext;
 with System.Multiprocessors;
+with System.Parameters;
 
 package System.OS_Interface is
    pragma Preelaborate;
@@ -239,7 +240,11 @@ package System.OS_Interface is
    -- Time --
    ----------
 
-   type time_t is new unsigned_long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
+   --  Time_t here used to be unsigned to match the VxWorks header
+   --  declaration. The header declaration has changed in newer release
+   --  and is now signed for applications.
 
    type timespec is record
       ts_sec  : time_t;
diff --git a/gcc/ada/libgnarl/s-qnx.ads b/gcc/ada/libgnarl/s-qnx.ads
index 7f33d70..811c41c 100644
--- a/gcc/ada/libgnarl/s-qnx.ads
+++ b/gcc/ada/libgnarl/s-qnx.ads
@@ -37,6 +37,8 @@
 
 with Interfaces.C;
 
+with System.Parameters;
+
 package System.QNX is
    pragma Preelaborate;
 
@@ -46,7 +48,8 @@ package System.QNX is
 
    subtype long        is Interfaces.C.long;
    subtype suseconds_t is Interfaces.C.long;
-   subtype time_t      is Interfaces.C.long;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
    subtype clockid_t   is Interfaces.C.int;
 
    type timespec is record
diff --git a/gcc/ada/libgnat/g-sothco.ads b/gcc/ada/libgnat/g-sothco.ads
index f6e61b2..b48657b 100644
--- a/gcc/ada/libgnat/g-sothco.ads
+++ b/gcc/ada/libgnat/g-sothco.ads
@@ -34,6 +34,7 @@
 
 with Ada.Unchecked_Conversion;
 with Interfaces.C.Strings;
+with System.Parameters;
 
 package GNAT.Sockets.Thin_Common is
 
@@ -44,9 +45,9 @@ package GNAT.Sockets.Thin_Common is
    Failure : constant C.int := -1;
 
    type time_t is
-     range -2 ** (8 * SOSC.SIZEOF_tv_sec - 1)
-         .. 2 ** (8 * SOSC.SIZEOF_tv_sec - 1) - 1;
-   for time_t'Size use 8 * SOSC.SIZEOF_tv_sec;
+     range -2 ** (System.Parameters.time_t_bits - 1)
+        .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
+   for time_t'Size use System.Parameters.time_t_bits;
    pragma Convention (C, time_t);
 
    type suseconds_t is
diff --git a/gcc/ada/libgnat/s-os_lib.ads b/gcc/ada/libgnat/s-os_lib.ads
index d4911d9..4c279d5 100644
--- a/gcc/ada/libgnat/s-os_lib.ads
+++ b/gcc/ada/libgnat/s-os_lib.ads
@@ -172,8 +172,14 @@ package System.OS_Lib is
    --  instead use OS_Time. These 3 declarations are indended for use only
    --  by consumers of the GNAT.OS_Lib renaming of this package.
 
-   subtype time_t is Long_Integer;
-   --  C time_t type of the time representation
+   subtype time_t is Long_Long_Integer;
+   --  C time_t can be either long or long long, but this is a subtype
+   --  not used in the compiler or tools, but only for user
+   --  applications, so we choose the Ada equivalent of the latter
+   --  because eventually that will be the type used out of necessity.
+   --  This may effect some user code on 32 bit targets that have not yet
+   --  migrated to the Posix 2008 standard, particularly pre version 5
+   --  32 bit Linux.
 
    function To_C (Time : OS_Time) return time_t;
    --  Convert OS_Time to C time_t type
diff --git a/gcc/ada/libgnat/s-osprim__darwin.adb b/gcc/ada/libgnat/s-osprim__darwin.adb
index adbd7ed..00d0ccb 100644
--- a/gcc/ada/libgnat/s-osprim__darwin.adb
+++ b/gcc/ada/libgnat/s-osprim__darwin.adb
@@ -31,6 +31,7 @@
 
 --  This version is for darwin
 
+with System.Parameters;
 package body System.OS_Primitives is
 
    --  ??? These definitions are duplicated from System.OS_Interface
@@ -45,7 +46,8 @@ package body System.OS_Primitives is
    pragma Convention (C, struct_timezone);
    type struct_timezone_ptr is access all struct_timezone;
 
-   type time_t is new Long_Integer;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type struct_timeval is record
       tv_sec       : time_t;
diff --git a/gcc/ada/libgnat/s-osprim__posix.adb b/gcc/ada/libgnat/s-osprim__posix.adb
index d3083dd..96bf70e 100644
--- a/gcc/ada/libgnat/s-osprim__posix.adb
+++ b/gcc/ada/libgnat/s-osprim__posix.adb
@@ -30,6 +30,7 @@
 ------------------------------------------------------------------------------
 
 --  This version is for POSIX-like operating systems
+with System.Parameters;
 
 package body System.OS_Primitives is
 
@@ -38,7 +39,8 @@ package body System.OS_Primitives is
    --  these declarations in System.OS_Interface and move these ones in
    --  the spec.
 
-   type time_t is new Long_Integer;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnat/s-osprim__posix2008.adb b/gcc/ada/libgnat/s-osprim__posix2008.adb
index 4804f0b..44f14c4f 100644
--- a/gcc/ada/libgnat/s-osprim__posix2008.adb
+++ b/gcc/ada/libgnat/s-osprim__posix2008.adb
@@ -33,6 +33,7 @@
 
 with System.CRTL;
 with System.OS_Constants;
+with System.Parameters;
 package body System.OS_Primitives is
 
    subtype int is System.CRTL.int;
@@ -41,7 +42,8 @@ package body System.OS_Primitives is
    --  we don't want to depend on any package. Consider removing these
    --  declarations in System.OS_Interface and move these ones to the spec.
 
-   type time_t is new System.CRTL.int64;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnat/s-osprim__rtems.adb b/gcc/ada/libgnat/s-osprim__rtems.adb
index f7a7e1f..23669e1 100644
--- a/gcc/ada/libgnat/s-osprim__rtems.adb
+++ b/gcc/ada/libgnat/s-osprim__rtems.adb
@@ -31,6 +31,7 @@
 
 --  This version is for POSIX-like operating systems
 
+with System.Parameters;
 package body System.OS_Primitives is
 
    --  ??? These definitions are duplicated from System.OS_Interface
@@ -38,7 +39,8 @@ package body System.OS_Primitives is
    --  these declarations in System.OS_Interface and move these ones in
    --  the spec.
 
-   type time_t is new Long_Long_Integer;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+      .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnat/s-osprim__x32.adb b/gcc/ada/libgnat/s-osprim__x32.adb
index 846ca11..d3c922c 100644
--- a/gcc/ada/libgnat/s-osprim__x32.adb
+++ b/gcc/ada/libgnat/s-osprim__x32.adb
@@ -38,7 +38,8 @@ package body System.OS_Primitives is
    --  these declarations in System.OS_Interface and move these ones in
    --  the spec.
 
-   type time_t is new Long_Long_Integer;
+   type time_t is range -2 ** (System.Parameters.time_t_bits - 1)
+     .. 2 ** (System.Parameters.time_t_bits - 1) - 1;
 
    type timespec is record
       tv_sec  : time_t;
diff --git a/gcc/ada/libgnat/s-parame.ads b/gcc/ada/libgnat/s-parame.ads
index d767f8d..178bd7c 100644
--- a/gcc/ada/libgnat/s-parame.ads
+++ b/gcc/ada/libgnat/s-parame.ads
@@ -100,6 +100,13 @@ package System.Parameters is
    --  Indicates if secondary stacks can grow and shrink at run-time. If False,
    --  the size of a secondary stack is fixed at the point of its creation.
 
+   ------------------------------------
+   -- Characteristics of time_t type --
+   ------------------------------------
+
+   time_t_bits : constant := Long_Integer'Size;
+   --  Number of bits in type time_t.
+
    ----------------------------------------------
    -- Characteristics of types in Interfaces.C --
    ----------------------------------------------
diff --git a/gcc/ada/libgnat/s-parame__ae653.ads b/gcc/ada/libgnat/s-parame__ae653.ads
index c42c97c..7682435 100644
--- a/gcc/ada/libgnat/s-parame__ae653.ads
+++ b/gcc/ada/libgnat/s-parame__ae653.ads
@@ -100,6 +100,13 @@ package System.Parameters is
    --  Indicates if secondary stacks can grow and shrink at run-time. If False,
    --  the size of a secondary stack is fixed at the point of its creation.
 
+   ------------------------------------
+   -- Characteristics of time_t type --
+   ------------------------------------
+
+   time_t_bits : constant := Long_Integer'Size;
+   --  Number of bits in type time_t.
+
    ----------------------------------------------
    -- Characteristics of types in Interfaces.C --
    ----------------------------------------------
diff --git a/gcc/ada/libgnat/s-parame__hpux.ads b/gcc/ada/libgnat/s-parame__hpux.ads
index 961c9ce..053cd76 100644
--- a/gcc/ada/libgnat/s-parame__hpux.ads
+++ b/gcc/ada/libgnat/s-parame__hpux.ads
@@ -98,6 +98,13 @@ package System.Parameters is
    --  Indicates if secondary stacks can grow and shrink at run-time. If False,
    --  the size of a secondary stack is fixed at the point of its creation.
 
+   ------------------------------------
+   -- Characteristics of time_t type --
+   ------------------------------------
+
+   time_t_bits : constant := Long_Integer'Size;
+   --  Number of bits in type time_t.
+
    ----------------------------------------------
    -- Characteristics of Types in Interfaces.C --
    ----------------------------------------------
diff --git a/gcc/ada/libgnat/s-parame__posix2008.ads b/gcc/ada/libgnat/s-parame__posix2008.ads
new file mode 100644
index 0000000..af299ec
--- /dev/null
+++ b/gcc/ada/libgnat/s-parame__posix2008.ads
@@ -0,0 +1,193 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                         GNAT COMPILER COMPONENTS                         --
+--                                                                          --
+--                    S Y S T E M . P A R A M E T E R S                     --
+--                                                                          --
+--                                 S p e c                                  --
+--                                                                          --
+--          Copyright (C) 1992-2021, 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- --
+-- 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.      --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is the Posix 2008 version for 64 bit time_t.
+
+--  This package defines some system dependent parameters for GNAT. These
+--  are values that are referenced by the runtime library and are therefore
+--  relevant to the target machine.
+
+--  The parameters whose value is defined in the spec are not generally
+--  expected to be changed. If they are changed, it will be necessary to
+--  recompile the run-time library.
+
+--  The parameters which are defined by functions can be changed by modifying
+--  the body of System.Parameters in file s-parame.adb. A change to this body
+--  requires only rebinding and relinking of the application.
+
+--  Note: do not introduce any pragma Inline statements into this unit, since
+--  otherwise the relinking and rebinding capability would be deactivated.
+
+pragma Compiler_Unit_Warning;
+
+package System.Parameters is
+   pragma Pure;
+
+   ---------------------------------------
+   -- Task And Stack Allocation Control --
+   ---------------------------------------
+
+   type Size_Type is range
+     -(2 ** (Integer'(Standard'Address_Size) - 1)) ..
+     +(2 ** (Integer'(Standard'Address_Size) - 1)) - 1;
+   --  Type used to provide task stack sizes to the runtime. Sized to permit
+   --  stack sizes of up to half the total addressable memory space. This may
+   --  seem excessively large (even for 32-bit systems), however there are many
+   --  instances of users requiring large stack sizes (for example string
+   --  processing).
+
+   Unspecified_Size : constant Size_Type := Size_Type'First;
+   --  Value used to indicate that no size type is set
+
+   function Default_Stack_Size return Size_Type;
+   --  Default task stack size used if none is specified
+
+   function Minimum_Stack_Size return Size_Type;
+   --  Minimum task stack size permitted
+
+   function Adjust_Storage_Size (Size : Size_Type) return Size_Type;
+   --  Given the storage size stored in the TCB, return the Storage_Size
+   --  value required by the RM for the Storage_Size attribute. The
+   --  required adjustment is as follows:
+   --
+   --    when Size = Unspecified_Size, return Default_Stack_Size
+   --    when Size < Minimum_Stack_Size, return Minimum_Stack_Size
+   --    otherwise return given Size
+
+   Default_Env_Stack_Size : constant Size_Type := 8_192_000;
+   --  Assumed size of the environment task, if no other information is
+   --  available. This value is used when stack checking is enabled and
+   --  no GNAT_STACK_LIMIT environment variable is set.
+
+   Stack_Grows_Down  : constant Boolean := True;
+   --  This constant indicates whether the stack grows up (False) or
+   --  down (True) in memory as functions are called. It is used for
+   --  proper implementation of the stack overflow check.
+
+   Runtime_Default_Sec_Stack_Size : constant Size_Type := 10 * 1024;
+   --  The run-time chosen default size for secondary stacks that may be
+   --  overridden by the user with the use of binder -D switch.
+
+   Sec_Stack_Dynamic : constant Boolean := True;
+   --  Indicates if secondary stacks can grow and shrink at run-time. If False,
+   --  the size of a secondary stack is fixed at the point of its creation.
+
+   ------------------------------------
+   -- Characteristics of time_t type --
+   ------------------------------------
+
+   time_t_bits : constant := Long_Long_Integer'Size;
+   --  Number of bits in type time_t. Use for targets that are Posix 2008
+   --  compliant (fixes the year 2038 time_t overflow).
+
+   ----------------------------------------------
+   -- Characteristics of types in Interfaces.C --
+   ----------------------------------------------
+
+   long_bits : constant := Long_Integer'Size;
+   --  Number of bits in type long and unsigned_long. The normal convention
+   --  is that this is the same as type Long_Integer, but this may not be true
+   --  of all targets.
+
+   ptr_bits  : constant := Standard'Address_Size;
+   subtype C_Address is System.Address;
+   --  Number of bits in Interfaces.C pointers, normally a standard address
+
+   C_Malloc_Linkname : constant String := "__gnat_malloc";
+   --  Name of runtime function used to allocate such a pointer
+
+   ----------------------------------------------
+   -- Behavior of Pragma Finalize_Storage_Only --
+   ----------------------------------------------
+
+   --  Garbage_Collected is a Boolean constant whose value indicates the
+   --  effect of the pragma Finalize_Storage_Entry on a controlled type.
+
+   --    Garbage_Collected = False
+
+   --      The system releases all storage on program termination only,
+   --      but not other garbage collection occurs, so finalization calls
+   --      are omitted only for outer level objects can be omitted if
+   --      pragma Finalize_Storage_Only is used.
+
+   --    Garbage_Collected = True
+
+   --      The system provides full garbage collection, so it is never
+   --      necessary to release storage for controlled objects for which
+   --      a pragma Finalize_Storage_Only is used.
+
+   Garbage_Collected : constant Boolean := False;
+   --  The storage mode for this system (release on program exit)
+
+   ---------------------
+   -- Tasking Profile --
+   ---------------------
+
+   --  In the following sections, constant parameters are defined to
+   --  allow some optimizations and fine tuning within the tasking run time
+   --  based on restrictions on the tasking features.
+
+   -------------------
+   -- Task Abortion --
+   -------------------
+
+   No_Abort : constant Boolean := False;
+   --  This constant indicates whether abort statements and asynchronous
+   --  transfer of control (ATC) are disallowed. If set to True, it is
+   --  assumed that neither construct is used, and the run time does not
+   --  need to defer/undefer abort and check for pending actions at
+   --  completion points. A value of True for No_Abort corresponds to:
+   --  pragma Restrictions (No_Abort_Statements);
+   --  pragma Restrictions (Max_Asynchronous_Select_Nesting => 0);
+
+   ---------------------
+   -- Task Attributes --
+   ---------------------
+
+   Max_Attribute_Count : constant := 32;
+   --  Number of task attributes stored in the task control block
+
+   -----------------------
+   -- Task Image Length --
+   -----------------------
+
+   Max_Task_Image_Length : constant := 256;
+   --  This constant specifies the maximum length of a task's image
+
+   ------------------------------
+   -- Exception Message Length --
+   ------------------------------
+
+   Default_Exception_Msg_Max_Length : constant := 200;
+   --  This constant specifies the default number of characters to allow
+   --  in an exception message (200 is minimum required by RM 11.4.1(18)).
+
+end System.Parameters;
diff --git a/gcc/ada/libgnat/s-parame__vxworks.ads b/gcc/ada/libgnat/s-parame__vxworks.ads
index 8598a43..11b408b 100644
--- a/gcc/ada/libgnat/s-parame__vxworks.ads
+++ b/gcc/ada/libgnat/s-parame__vxworks.ads
@@ -100,6 +100,21 @@ package System.Parameters is
    --  Indicates if secondary stacks can grow and shrink at run-time. If False,
    --  the size of a secondary stack is fixed at the point of its creation.
 
+   ------------------------------------
+   -- Characteristics of time_t type --
+   ------------------------------------
+
+   --  IMPORTANT NOTE:
+   --  Select the appropriate time_t_bits for the VSB in use, then rebuild
+   --  the runtime using instructions in adainclude/libada.gpr.
+
+   time_t_bits : constant := Long_Integer'Size;
+   --  Number of bits in type time_t for SR0650 and before and SR0660 with
+   --  non-default configuration.
+
+   --  time_t_bits : constant := Long_Long_Integer'Size;
+   --  Number of bits in type time_t for SR0660 with default configuration.
+
    ----------------------------------------------
    -- Characteristics of types in Interfaces.C --
    ----------------------------------------------