2016-03-31  Svante Signell  <svante.signell@gmail.com>

        * gcc-interface/Makefile.in: Add support for x86 GNU/Hurd.
        * s-osinte-gnu.ads: New specification file.
        * s-osinte-gnu.adb: New body file, basically s-osinte-posix.adb
          adding dummy implementation of functions not yet implemented.
---
Index: gcc-5-5.3.1/src/gcc/ada/s-osinte-gnu.adb
===================================================================
--- /dev/null
+++ gcc-5-5.3.1/src/gcc/ada/s-osinte-gnu.adb
@@ -0,0 +1,144 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                 GNAT RUN-TIME LIBRARY (GNARL) COMPONENTS                 --
+--                                                                          --
+--                   S Y S T E M . O S _ I N T E R F A C E                  --
+--                                                                          --
+--                                   B o d y                                --
+--                                                                          --
+--          Copyright (C) 2015-2016, 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/>.                                          --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University.       --
+-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is the GNU/Hurd version of this package.
+
+pragma Polling (Off);
+--  Turn off polling, we do not want ATC polling to take place during
+--  tasking operations. It causes infinite loops and other problems.
+
+--  This package encapsulates all direct interfaces to OS services
+--  that are needed by children of System.
+
+package body System.OS_Interface is
+
+   --------------------
+   -- Get_Stack_Base --
+   --------------------
+
+   function Get_Stack_Base (thread : pthread_t) return Address is
+      pragma Warnings (Off, thread);
+
+   begin
+      return Null_Address;
+   end Get_Stack_Base;
+
+   ------------------
+   -- pthread_init --
+   ------------------
+
+   procedure pthread_init is
+   begin
+      null;
+   end pthread_init;
+
+   --------------------------------------
+   -- pthread_mutexattr_setprioceiling --
+   --------------------------------------
+
+   function pthread_mutexattr_setprioceiling
+     (attr     : access pthread_mutexattr_t;
+      prioceiling : int) return int is
+      pragma Unreferenced (attr, prioceiling);
+   begin
+      return 0;
+   end pthread_mutexattr_setprioceiling;
+
+   --------------------------------------
+   -- pthread_mutexattr_getprioceiling --
+   --------------------------------------
+
+   function pthread_mutexattr_getprioceiling
+     (attr     : access pthread_mutexattr_t;
+      prioceiling : access int) return int is
+      pragma Unreferenced (attr, prioceiling);
+   begin
+      return 0;
+   end pthread_mutexattr_getprioceiling;
+
+   ---------------------------
+   -- pthread_setschedparam --
+   ---------------------------
+
+   function pthread_setschedparam
+     (thread : pthread_t;
+      policy : int;
+      param : access struct_sched_param) return int is
+      pragma Unreferenced (thread, policy, param);
+   begin
+      return 0;
+   end pthread_setschedparam;
+
+   -----------------
+   -- To_Duration --
+   -----------------
+
+   function To_Duration (TS : timespec) return Duration is
+   begin
+      return Duration (TS.tv_sec) + Duration (TS.tv_nsec) / 10#1#E9;
+   end To_Duration;
+
+   ------------------------
+   -- To_Target_Priority --
+   ------------------------
+
+   function To_Target_Priority
+     (Prio : System.Any_Priority) return Interfaces.C.int
+   is
+   begin
+      return Interfaces.C.int (Prio);
+   end To_Target_Priority;
+
+   -----------------
+   -- To_Timespec --
+   -----------------
+
+   function To_Timespec (D : Duration) return timespec is
+      S : time_t;
+      F : Duration;
+
+   begin
+      S := time_t (Long_Long_Integer (D));
+      F := D - Duration (S);
+
+      --  If F has negative value due to a round-up, adjust for positive F
+      --  value.
+
+      if F < 0.0 then
+         S := S - 1;
+         F := F + 1.0;
+      end if;
+
+      return timespec'(tv_sec => S,
+                       tv_nsec => long (Long_Long_Integer (F * 10#1#E9)));
+   end To_Timespec;
+
+end System.OS_Interface;
Index: gcc-5-5.3.1/src/gcc/ada/s-osinte-gnu.ads
===================================================================
--- /dev/null
+++ gcc-5-5.3.1/src/gcc/ada/s-osinte-gnu.ads
@@ -0,0 +1,801 @@
+------------------------------------------------------------------------------
+--                                                                          --
+--                GNU ADA RUN-TIME LIBRARY (GNARL) COMPONENTS               --
+--                                                                          --
+--                   S Y S T E M . O S _ I N T E R F A C E                  --
+--                                                                          --
+--                                  S p e c                                 --
+--                                                                          --
+--             Copyright (C) 1991-1994, Florida State University            --
+--          Copyright (C) 1995-2016, 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/>.                                          --
+--                                                                          --
+-- GNARL was developed by the GNARL team at Florida State University.       --
+-- Extensive contributions were provided by Ada Core Technologies, Inc.     --
+--                                                                          --
+------------------------------------------------------------------------------
+
+--  This is the GNU/Hurd (POSIX Threads) version of this package
+
+--  This package encapsulates all direct interfaces to OS services
+--  that are needed by children of System.
+
+--  PLEASE DO NOT add any with-clauses to this package or remove the pragma
+--  Preelaborate. This package is designed to be a bottom-level (leaf) package
+
+with Interfaces.C;
+with Unchecked_Conversion;
+
+package System.OS_Interface is
+   pragma Preelaborate;
+
+   pragma Linker_Options ("-lpthread");
+   pragma Linker_Options ("-lrt");
+
+   subtype int            is Interfaces.C.int;
+   subtype char           is Interfaces.C.char;
+   subtype short          is Interfaces.C.short;
+   subtype long           is Interfaces.C.long;
+   subtype unsigned       is Interfaces.C.unsigned;
+   subtype unsigned_short is Interfaces.C.unsigned_short;
+   subtype unsigned_long  is Interfaces.C.unsigned_long;
+   subtype unsigned_char  is Interfaces.C.unsigned_char;
+   subtype plain_char     is Interfaces.C.plain_char;
+   subtype size_t         is Interfaces.C.size_t;
+
+   -----------
+   -- Errno --
+   -----------
+   --  From /usr/include/i386-gnu/bits/errno.h
+
+   function errno return int;
+   pragma Import (C, errno, "__get_errno");
+
+   EAGAIN   : constant := 1073741859;
+   EINTR    : constant := 1073741828;
+   EINVAL   : constant := 1073741846;
+   ENOMEM   : constant := 1073741836;
+   EPERM    : constant := 1073741825;
+   ETIMEDOUT    : constant := 1073741884;
+
+   -------------
+   -- Signals --
+   -------------
+   --  From /usr/include/i386-gnu/bits/signum.h
+
+   Max_Interrupt : constant := 32;
+   type Signal is new int range 0 .. Max_Interrupt;
+   for Signal'Size use int'Size;
+
+   SIGHUP     : constant := 1; --  hangup
+   SIGINT     : constant := 2; --  interrupt (rubout)
+   SIGQUIT    : constant := 3; --  quit (ASCD FS)
+   SIGILL     : constant := 4; --  illegal instruction (not reset)
+   SIGTRAP    : constant := 5; --  trace trap (not reset)
+   SIGIOT     : constant := 6; --  IOT instruction
+   SIGABRT    : constant := 6; --  used by abort, replace SIGIOT in the  future
+   SIGEMT     : constant := 7; --  EMT instruction
+   SIGFPE     : constant := 8; --  floating point exception
+   SIGKILL    : constant := 9; --  kill (cannot be caught or ignored)
+   SIGBUS     : constant := 10; --  bus error
+   SIGSEGV    : constant := 11; --  segmentation violation
+   SIGSYS     : constant := 12; --  bad argument to system call
+   SIGPIPE    : constant := 13; --  write on a pipe with no one to read it
+   SIGALRM    : constant := 14; --  alarm clock
+   SIGTERM    : constant := 15; --  software termination signal from kill
+   SIGURG     : constant := 16; --  urgent condition on IO channel
+   SIGSTOP    : constant := 17; --  stop (cannot be caught or ignored)
+   SIGTSTP    : constant := 18; --  user stop requested from tty
+   SIGCONT    : constant := 19; --  stopped process has been continued
+   SIGCLD     : constant := 20; --  alias for SIGCHLD
+   SIGCHLD    : constant := 20; --  child status change
+   SIGTTIN    : constant := 21; --  background tty read attempted
+   SIGTTOU    : constant := 22; --  background tty write attempted
+   SIGIO      : constant := 23; --  I/O possible (Solaris SIGPOLL alias)
+   SIGPOLL    : constant := 23; --  I/O possible (same as SIGIO?)
+   SIGXCPU    : constant := 24; --  CPU time limit exceeded
+   SIGXFSZ    : constant := 25; --  filesize limit exceeded
+   SIGVTALRM  : constant := 26; --  virtual timer expired
+   SIGPROF    : constant := 27; --  profiling timer expired
+   SIGWINCH   : constant := 28; --  window size change
+   SIGINFO    : constant := 29; --  information request (NetBSD/FreeBSD)
+   SIGUSR1    : constant := 30; --  user defined signal 1
+   SIGUSR2    : constant := 31; --  user defined signal 2
+   SIGLOST    : constant := 32; --  Resource lost (Sun); server died (GNU)
+
+   SIGADAABORT : constant := SIGABRT;
+   --  Change this if you want to use another signal for task abort.
+   --  SIGTERM might be a good one.
+
+   type Signal_Set is array (Natural range <>) of Signal;
+
+   Unmasked    : constant Signal_Set := (
+      SIGTRAP,
+      --  To enable debugging on multithreaded applications, mark SIGTRAP to
+      --  be kept unmasked.
+
+      SIGBUS,
+
+      SIGTTIN, SIGTTOU, SIGTSTP,
+      --  Keep these three signals unmasked so that background processes
+      --  and IO behaves as normal "C" applications
+
+      SIGPROF,
+      --  To avoid confusing the profiler
+
+      SIGKILL, SIGSTOP);
+      --  These two signals actually cannot be masked;
+      --  POSIX simply won't allow it.
+
+   Reserved    : constant Signal_Set :=
+   --  I am not sure why the following signal is reserved.
+   --  I guess they are not supported by this version of GNU/Hurd.
+     (0 .. 0 => SIGVTALRM);
+
+   type sigset_t is private;
+
+   --  From /usr/include/signal.h /usr/include/i386-gnu/bits/sigset.h
+   function sigaddset (set : access sigset_t; sig : Signal) return int;
+   pragma Import (C, sigaddset, "sigaddset");
+
+   function sigdelset (set : access sigset_t; sig : Signal) return int;
+   pragma Import (C, sigdelset, "sigdelset");
+
+   function sigfillset (set : access sigset_t) return int;
+   pragma Import (C, sigfillset, "sigfillset");
+
+   function sigismember (set : access sigset_t; sig : Signal) return int;
+   pragma Import (C, sigismember, "sigismember");
+
+   function sigemptyset (set : access sigset_t) return int;
+   pragma Import (C, sigemptyset, "sigemptyset");
+
+   --  sigcontext is architecture dependent, so define it private
+   type struct_sigcontext is private;
+
+   --  From /usr/include/i386-gnu/bits/sigaction.h: Note: arg. order differs
+   type struct_sigaction is record
+      sa_handler : System.Address;
+      sa_mask    : sigset_t;
+      sa_flags   : int;
+   end record;
+   pragma Convention (C, struct_sigaction);
+
+   type struct_sigaction_ptr is access all struct_sigaction;
+
+   --  From /usr/include/i386-gnu/bits/sigaction.h
+   SIG_BLOCK   : constant := 1;
+   SIG_UNBLOCK : constant := 2;
+   SIG_SETMASK : constant := 3;
+
+   --  From /usr/include/i386-gnu/bits/signum.h
+   SIG_ERR  : constant := 1;
+   SIG_DFL  : constant := 0;
+   SIG_IGN  : constant := 1;
+   SIG_HOLD : constant := 2;
+
+   --  From /usr/include/i386-gnu/bits/sigaction.h
+   SA_SIGINFO : constant := 16#0040#;
+   SA_ONSTACK : constant := 16#0001#;
+
+   function sigaction
+     (sig  : Signal;
+      act  : struct_sigaction_ptr;
+      oact : struct_sigaction_ptr) return int;
+   pragma Import (C, sigaction, "sigaction");
+
+   ----------
+   -- Time --
+   ----------
+
+   Time_Slice_Supported : constant Boolean := True;
+   --  Indicates whether time slicing is supported (i.e SCHED_RR is supported)
+
+   type timespec is private;
+
+   function nanosleep (rqtp, rmtp : access timespec) return int;
+   pragma Import (C, nanosleep, "nanosleep");
+
+   type clockid_t is new int;
+   CLOCK_REALTIME : constant clockid_t := 0;
+
+   --  From: /usr/include/time.h
+   function clock_gettime
+     (clock_id : clockid_t;
+      tp       : access timespec)
+      return int;
+   pragma Import (C, clock_gettime, "clock_gettime");
+
+   function clock_getres
+     (clock_id : clockid_t;
+      res      : access timespec) return int;
+   pragma Import (C, clock_getres, "clock_getres");
+
+   function To_Duration (TS : timespec) return Duration;
+   pragma Inline (To_Duration);
+
+   function To_Timespec (D : Duration) return timespec;
+   pragma Inline (To_Timespec);
+
+   --  From: /usr/include/unistd.h
+   function sysconf (name : int) return long;
+   pragma Import (C, sysconf);
+
+   --  From /usr/include/i386-gnu/bits/confname.h
+   SC_CLK_TCK          : constant := 2;
+   SC_NPROCESSORS_ONLN : constant := 84;
+
+   -------------------------
+   -- Priority Scheduling --
+   -------------------------
+   --  From /usr/include/i386-gnu/bits/sched.h
+
+   SCHED_OTHER : constant := 0;
+   SCHED_FIFO  : constant := 1;
+   SCHED_RR    : constant := 2;
+
+   function To_Target_Priority
+     (Prio : System.Any_Priority) return Interfaces.C.int;
+   --  Maps System.Any_Priority to a POSIX priority.
+
+   -------------
+   -- Process --
+   -------------
+
+   type pid_t is private;
+
+   --  From: /usr/include/signal.h
+   function kill (pid : pid_t; sig : Signal) return int;
+   pragma Import (C, kill, "kill");
+
+   --  From: /usr/include/unistd.h
+   function getpid return pid_t;
+   pragma Import (C, getpid, "getpid");
+
+   ---------
+   -- LWP --
+   ---------
+
+   --  From: /usr/include/pthread/pthread.h
+   function lwp_self return System.Address;
+   --  lwp_self does not exist on this thread library, revert to pthread_self
+   --  which is the closest approximation (with getpid). This function is
+   --  needed to share 7staprop.adb across POSIX-like targets.
+   pragma Import (C, lwp_self, "pthread_self");
+
+   -------------
+   -- Threads --
+   -------------
+
+   type Thread_Body is access
+     function (arg : System.Address) return System.Address;
+   pragma Convention (C, Thread_Body);
+
+   function Thread_Body_Access is new
+     Unchecked_Conversion (System.Address, Thread_Body);
+
+   --  From: /usr/include/bits/pthread.h:typedef int __pthread_t;
+   --  /usr/include/pthread/pthreadtypes.h:typedef __pthread_t pthread_t;
+   type pthread_t is new unsigned_long;
+   subtype Thread_Id        is pthread_t;
+
+   function To_pthread_t is new Unchecked_Conversion
+     (unsigned_long, pthread_t);
+
+   type pthread_mutex_t     is limited private;
+   type pthread_rwlock_t     is limited private;
+   type pthread_cond_t      is limited private;
+   type pthread_attr_t      is limited private;
+   type pthread_mutexattr_t is limited private;
+   type pthread_rwlockattr_t is limited private;
+   type pthread_condattr_t  is limited private;
+   type pthread_key_t       is private;
+
+   --  From /usr/include/pthread/pthreadtypes.h
+   PTHREAD_CREATE_DETACHED : constant := 1;
+   PTHREAD_CREATE_JOINABLE : constant := 0;
+
+   PTHREAD_SCOPE_PROCESS : constant := 1;
+   PTHREAD_SCOPE_SYSTEM  : constant := 0;
+
+   -----------
+   -- Stack --
+   -----------
+
+   --  From: /usr/include/i386-gnu/bits/sigstack.h
+   type stack_t is record
+      ss_sp    : System.Address;
+      ss_size  : size_t;
+      ss_flags : int;
+   end record;
+   pragma Convention (C, stack_t);
+
+   function sigaltstack
+     (ss  : not null access stack_t;
+      oss : access stack_t) return int;
+   pragma Import (C, sigaltstack, "sigaltstack");
+
+   Alternate_Stack : aliased System.Address;
+   --  This is a dummy definition, never used (Alternate_Stack_Size is null)
+
+   Alternate_Stack_Size : constant := 0;
+   --  No alternate signal stack is used on this platform
+
+   Stack_Base_Available : constant Boolean := False;
+   --  Indicates whether the stack base is available on this target
+
+   function Get_Stack_Base (thread : pthread_t) return Address;
+   pragma Inline (Get_Stack_Base);
+   --  returns the stack base of the specified thread. Only call this function
+   --  when Stack_Base_Available is True.
+
+   --  From: /usr/include/i386-gnu/bits/shm.h __getpagesize or getpagesize??
+   function Get_Page_Size return size_t;
+   function Get_Page_Size return Address;
+   pragma Import (C, Get_Page_Size, "__getpagesize");
+   --  Returns the size of a page
+
+   --  From /usr/include/i386-gnu/bits/mman.h
+   PROT_NONE  : constant := 0;
+   PROT_READ  : constant := 4;
+   PROT_WRITE : constant := 2;
+   PROT_EXEC  : constant := 1;
+   PROT_ALL   : constant := PROT_READ + PROT_WRITE + PROT_EXEC;
+   PROT_ON    : constant := PROT_NONE;
+   PROT_OFF   : constant := PROT_ALL;
+
+   --  From /usr/include/i386-gnu/bits/mman.h
+   function mprotect (addr : Address; len : size_t; prot : int) return int;
+   pragma Import (C, mprotect);
+
+   ---------------------------------------
+   -- Nonstandard Thread Initialization --
+   ---------------------------------------
+
+   procedure pthread_init;
+   pragma Inline (pthread_init);
+   --  This is a dummy procedure to share some GNULLI files
+
+   -------------------------
+   -- POSIX.1c  Section 3 --
+   -------------------------
+
+   --  From: /usr/include/signal.h:
+   --  sigwait (__const sigset_t *__restrict __set, int *__restrict __sig)
+   function sigwait (set : access sigset_t; sig : access Signal) return int;
+   pragma Import (C, sigwait, "sigwait");
+
+   --  From: /usr/include/pthread/pthread.h:
+   --  extern int pthread_kill (pthread_t thread, int signo);
+   function pthread_kill (thread : pthread_t; sig : Signal) return int;
+   pragma Import (C, pthread_kill, "pthread_kill");
+
+   --  From: /usr/include/i386-gnu/bits/sigthread.h
+   --  extern int pthread_sigmask (int __how, __const __sigset_t *__newmask,
+   --  __sigset_t *__oldmask) __THROW;
+   function pthread_sigmask
+     (how  : int;
+      set  : access sigset_t;
+      oset : access sigset_t) return int;
+   pragma Import (C, pthread_sigmask, "pthread_sigmask");
+
+   --------------------------
+   -- POSIX.1c  Section 11 --
+   --------------------------
+
+   --  From: /usr/include/pthread/pthread.h and
+   --  /usr/include/pthread/pthreadtypes.h
+   function pthread_mutexattr_init
+     (attr : access pthread_mutexattr_t) return int;
+   pragma Import (C, pthread_mutexattr_init, "pthread_mutexattr_init");
+
+   function pthread_mutexattr_destroy
+     (attr : access pthread_mutexattr_t) return int;
+   pragma Import (C, pthread_mutexattr_destroy, "pthread_mutexattr_destroy");
+
+   function pthread_mutex_init
+     (mutex : access pthread_mutex_t;
+      attr  : access pthread_mutexattr_t) return int;
+   pragma Import (C, pthread_mutex_init, "pthread_mutex_init");
+
+   function pthread_mutex_destroy (mutex : access pthread_mutex_t) return int;
+   pragma Import (C, pthread_mutex_destroy, "pthread_mutex_destroy");
+
+   function pthread_mutex_lock (mutex : access pthread_mutex_t) return int;
+   pragma Import (C, pthread_mutex_lock, "pthread_mutex_lock");
+
+   function pthread_mutex_unlock (mutex : access pthread_mutex_t) return int;
+   pragma Import (C, pthread_mutex_unlock, "pthread_mutex_unlock");
+
+   function pthread_rwlockattr_init
+     (attr : access pthread_rwlockattr_t) return int;
+   pragma Import (C, pthread_rwlockattr_init, "pthread_rwlockattr_init");
+
+   function pthread_rwlockattr_destroy
+     (attr : access pthread_rwlockattr_t) return int;
+   pragma Import (C, pthread_rwlockattr_destroy, "pthread_rwlockattr_destroy");
+   PTHREAD_RWLOCK_PREFER_READER_NP              : constant := 0;
+   PTHREAD_RWLOCK_PREFER_WRITER_NP              : constant := 1;
+   PTHREAD_RWLOCK_PREFER_WRITER_NONRECURSIVE_NP : constant := 2;
+
+   function pthread_rwlockattr_setkind_np
+     (attr : access pthread_rwlockattr_t;
+      pref : int) return int;
+   pragma Import
+     (C, pthread_rwlockattr_setkind_np, "pthread_rwlockattr_setkind_np");
+
+   function pthread_rwlock_init
+     (mutex : access pthread_rwlock_t;
+      attr  : access pthread_rwlockattr_t) return int;
+   pragma Import (C, pthread_rwlock_init, "pthread_rwlock_init");
+
+   function pthread_rwlock_destroy
+     (mutex : access pthread_rwlock_t) return int;
+   pragma Import (C, pthread_rwlock_destroy, "pthread_rwlock_destroy");
+
+   function pthread_rwlock_rdlock (mutex : access pthread_rwlock_t) return int;
+   pragma Import (C, pthread_rwlock_rdlock, "pthread_rwlock_rdlock");
+
+   function pthread_rwlock_wrlock (mutex : access pthread_rwlock_t) return int;
+   pragma Import (C, pthread_rwlock_wrlock, "pthread_rwlock_wrlock");
+
+   function pthread_rwlock_unlock (mutex : access pthread_rwlock_t) return int;
+   pragma Import (C, pthread_rwlock_unlock, "pthread_rwlock_unlock");
+
+   function pthread_condattr_init
+     (attr : access pthread_condattr_t) return int;
+   pragma Import (C, pthread_condattr_init, "pthread_condattr_init");
+
+   function pthread_condattr_destroy
+     (attr : access pthread_condattr_t) return int;
+   pragma Import (C, pthread_condattr_destroy, "pthread_condattr_destroy");
+
+   function pthread_cond_init
+     (cond : access pthread_cond_t;
+      attr : access pthread_condattr_t) return int;
+   pragma Import (C, pthread_cond_init, "pthread_cond_init");
+
+   function pthread_cond_destroy (cond : access pthread_cond_t) return int;
+   pragma Import (C, pthread_cond_destroy, "pthread_cond_destroy");
+
+   function pthread_cond_signal (cond : access pthread_cond_t) return int;
+   pragma Import (C, pthread_cond_signal, "pthread_cond_signal");
+
+   function pthread_cond_wait
+     (cond  : access pthread_cond_t;
+      mutex : access pthread_mutex_t) return int;
+   pragma Import (C, pthread_cond_wait, "pthread_cond_wait");
+
+   function pthread_cond_timedwait
+     (cond    : access pthread_cond_t;
+      mutex   : access pthread_mutex_t;
+      abstime : access timespec) return int;
+   pragma Import (C, pthread_cond_timedwait, "pthread_cond_timedwait");
+
+   Relative_Timed_Wait : constant Boolean := False;
+   --  pthread_cond_timedwait requires an absolute delay time
+
+   --------------------------
+   -- POSIX.1c  Section 13 --
+   --------------------------
+   --  From /usr/include/pthread/pthreadtypes.h
+
+   PTHREAD_PRIO_NONE    : constant := 0;
+   PTHREAD_PRIO_PROTECT : constant := 2;
+   PTHREAD_PRIO_INHERIT : constant := 1;
+
+   --  GNU/Hurd does not support Thread Priority Protection or Thread
+   --  Priority Inheritance and lacks some pthread_mutexattr_* functions.
+   --  Replace them with dummy versions.
+   --  From: /usr/include/pthread/pthread.h
+
+   function pthread_mutexattr_setprotocol
+     (attr     : access pthread_mutexattr_t;
+      protocol : int) return int;
+   pragma Import (C, pthread_mutexattr_setprotocol,
+     "pthread_mutexattr_setprotocol");
+
+   function pthread_mutexattr_getprotocol
+     (attr     : access pthread_mutexattr_t;
+      protocol : access int) return int;
+   pragma Import (C, pthread_mutexattr_getprotocol,
+     "pthread_mutexattr_getprotocol");
+
+   function pthread_mutexattr_setprioceiling
+     (attr     : access pthread_mutexattr_t;
+      prioceiling : int) return int;
+
+   function pthread_mutexattr_getprioceiling
+     (attr     : access pthread_mutexattr_t;
+      prioceiling : access int) return int;
+
+   type struct_sched_param is record
+      sched_priority : int;  --  scheduling priority
+   end record;
+   pragma Convention (C, struct_sched_param);
+
+   function pthread_setschedparam
+     (thread : pthread_t;
+      policy : int;
+      param  : access struct_sched_param) return int;
+
+   function pthread_attr_setscope
+     (attr            : access pthread_attr_t;
+      contentionscope : int) return int;
+   pragma Import (C, pthread_attr_setscope, "pthread_attr_setscope");
+
+   function pthread_attr_getscope
+     (attr            : access pthread_attr_t;
+      contentionscope : access int) return int;
+   pragma Import (C, pthread_attr_getscope, "pthread_attr_getscope");
+
+   function pthread_attr_setinheritsched
+     (attr            : access pthread_attr_t;
+      inheritsched : int) return int;
+   pragma Import (C, pthread_attr_setinheritsched,
+     "pthread_attr_setinheritsched");
+
+   function pthread_attr_getinheritsched
+     (attr         : access pthread_attr_t;
+      inheritsched : access int) return int;
+   pragma Import (C, pthread_attr_getinheritsched,
+     "pthread_attr_getinheritsched");
+
+   function pthread_attr_setschedpolicy
+     (attr   : access pthread_attr_t;
+      policy : int) return int;
+   pragma Import (C, pthread_attr_setschedpolicy, "pthread_setschedpolicy");
+
+   function sched_yield return int;
+   pragma Import (C, sched_yield, "sched_yield");
+
+   ---------------------------
+   -- P1003.1c - Section 16 --
+   ---------------------------
+
+   function pthread_attr_init
+     (attributes : access pthread_attr_t) return int;
+   pragma Import (C, pthread_attr_init, "pthread_attr_init");
+
+   function pthread_attr_destroy
+     (attributes : access pthread_attr_t) return int;
+   pragma Import (C, pthread_attr_destroy, "pthread_attr_destroy");
+
+   function pthread_attr_setdetachstate
+     (attr        : access pthread_attr_t;
+      detachstate : int) return int;
+   pragma Import
+     (C, pthread_attr_setdetachstate, "pthread_attr_setdetachstate");
+
+   function pthread_attr_setstacksize
+     (attr      : access pthread_attr_t;
+      stacksize : size_t) return int;
+   pragma Import (C, pthread_attr_setstacksize, "pthread_attr_setstacksize");
+
+   --  From: /usr/include/pthread/pthread.h
+   function pthread_create
+     (thread        : access pthread_t;
+      attributes    : access pthread_attr_t;
+      start_routine : Thread_Body;
+      arg           : System.Address) return int;
+   pragma Import (C, pthread_create, "pthread_create");
+
+   procedure pthread_exit (status : System.Address);
+   pragma Import (C, pthread_exit, "pthread_exit");
+
+   function pthread_self return pthread_t;
+   pragma Import (C, pthread_self, "pthread_self");
+
+   --------------------------
+   -- POSIX.1c  Section 17 --
+   --------------------------
+
+   function pthread_setspecific
+     (key   : pthread_key_t;
+      value : System.Address) return int;
+   pragma Import (C, pthread_setspecific, "pthread_setspecific");
+
+   function pthread_getspecific (key : pthread_key_t) return System.Address;
+   pragma Import (C, pthread_getspecific, "pthread_getspecific");
+
+   type destructor_pointer is access procedure (arg : System.Address);
+   pragma Convention (C, destructor_pointer);
+
+   function pthread_key_create
+     (key        : access pthread_key_t;
+      destructor : destructor_pointer) return int;
+   pragma Import (C, pthread_key_create, "pthread_key_create");
+
+   --  From /usr/include/i386-gnu/bits/sched.h
+   CPU_SETSIZE : constant := 1_024;
+
+   type bit_field is array (1 .. CPU_SETSIZE) of Boolean;
+   for bit_field'Size use CPU_SETSIZE;
+   pragma Pack (bit_field);
+   pragma Convention (C, bit_field);
+
+   type cpu_set_t is record
+      bits : bit_field;
+   end record;
+   pragma Convention (C, cpu_set_t);
+
+private
+
+   type sigset_t is array (1 .. 4) of unsigned;
+
+   --  In GNU/Hurd the component sa_handler turns out to
+   --  be one a union type, and the selector is a macro:
+   --  #define sa_handler __sigaction_handler.sa_handler
+   --  #define sa_sigaction __sigaction_handler.sa_sigaction
+
+   --  Should we add a signal_context type here ?
+   --  How could it be done independent of the CPU architecture ?
+   --  sigcontext type is opaque, so it is architecturally neutral.
+   --  It is always passed as an access type, so define it as an empty record
+   --  since the contents are not used anywhere.
+   type struct_sigcontext is null record;
+   pragma Convention (C, struct_sigcontext);
+
+   type pid_t is new int;
+
+   type time_t is new long;
+
+   type timespec is record
+      tv_sec  : time_t;
+      tv_nsec : long;
+   end record;
+   pragma Convention (C, timespec);
+
+   --  From: /usr/include/pthread/pthreadtypes.h:
+   --  typedef struct __pthread_attr pthread_attr_t;
+   --  /usr/include/i386-gnu/bits/thread-attr.h: struct __pthread_attr...
+   --  /usr/include/pthread/pthreadtypes.h: enum __pthread_contentionscope
+   --   enum __pthread_detachstate detachstate;
+   --   enum __pthread_inheritsched inheritsched;
+   --   enum __pthread_contentionscope contentionscope;
+   --   Not used: schedpolicy   : int;
+   type pthread_attr_t is record
+      schedparam    : struct_sched_param;
+      stackaddr     : System.Address;
+      stacksize     : size_t;
+      guardsize     : size_t;
+      detachstate   : int;
+      inheritsched  : int;
+      contentionscope : int;
+      schedpolicy   : int;
+   end record;
+   pragma Convention (C, pthread_attr_t);
+
+   --  From: /usr/include/pthread/pthreadtypes.h:
+   --  typedef struct __pthread_condattr pthread_condattr_t;
+   --  From: /usr/include/i386-gnu/bits/condition-attr.h:
+   --  struct __pthread_condattr {
+   --    enum __pthread_process_shared pshared;
+   --    __Clockid_T Clock;}
+   --  From: /usr/include/pthread/pthreadtypes.h:
+   --  enum __pthread_process_shared
+   type pthread_condattr_t is record
+      pshared : int;
+      clock   : clockid_t;
+   end record;
+   pragma Convention (C, pthread_condattr_t);
+
+   --  From: /usr/include/pthread/pthreadtypes.h:
+   --  typedef struct __pthread_mutexattr pthread_mutexattr_t; and
+   --  /usr/include/i386-gnu/bits/mutex-attr.h
+   --  struct __pthread_mutexattr {
+   --  int prioceiling;
+   --  enum __pthread_mutex_protocol protocol;
+   --  enum __pthread_process_shared pshared;
+   --  enum __pthread_mutex_type mutex_type;};
+   type pthread_mutexattr_t is record
+      prioceiling : int;
+      protocol    : int;
+      pshared     : int;
+      mutex_type  : int;
+   end record;
+   pragma Convention (C, pthread_mutexattr_t);
+
+   --  From: /usr/include/pthread/pthreadtypes.h
+   --  typedef struct __pthread_mutex pthread_mutex_t; and
+   --  /usr/include/i386-gnu/bits/mutex.h:
+   --  struct __pthread_mutex {
+   --  __pthread_spinlock_t __held;
+   --  __pthread_spinlock_t __lock;
+   --  /* in cthreads, mutex_init does not initialized the third
+   --    pointer, as such, we cannot rely on its value for anything.  */
+   --    char *cthreadscompat1;
+   --  struct __pthread *__queue;
+   --  struct __pthread_mutexattr *attr;
+   --  void *data;
+   --  /*  up to this point, we are completely compatible with cthreads
+   --    and what libc expects.  */
+   --    void *owner;
+   --  unsigned locks;
+   --  /* if null then the default attributes apply.  */
+   --    };
+
+   type pthread_mutex_t is record
+      held          : int;
+      lock          : int;
+      cthreadcompat : System.Address;
+      queue         : System.Address;
+      attr          : System.Address;
+      data          : System.Address;
+      owner         : System.Address;
+      locks         : unsigned;
+   end record;
+   pragma Convention (C, pthread_mutex_t);
+   --  pointer needed?
+   --  type pthread_mutex_t_ptr is access pthread_mutex_t;
+
+   --  From: /usr/include/pthread/pthreadtypes.h:
+   --  typedef struct __pthread_cond pthread_cond_t;
+   --  typedef struct __pthread_condattr pthread_condattr_t;
+   --  /usr/include/i386-gnu/bits/condition.h:struct __pthread_cond{}
+   --  pthread_condattr_t: see above!
+   --  /usr/include/i386-gnu/bits/condition.h:
+   --  struct __pthread_condimpl *__impl;
+
+   type pthread_cond_t is record
+      lock       : int;
+      queue      : System.Address;
+      condattr   : System.Address;
+      impl       : System.Address;
+      data       : System.Address;
+   end record;
+   pragma Convention (C, pthread_cond_t);
+
+   --  From: /usr/include/pthread/pthreadtypes.h:
+   --  typedef __pthread_key pthread_key_t; and
+   --  /usr/include/i386-gnu/bits/thread-specific.h:
+   --  typedef int __pthread_key;
+
+   type pthread_key_t is new int;
+
+   --  From: /usr/include/i386-gnu/bits/rwlock-attr.h:
+   --  struct __pthread_rwlockattr {
+   --  enum __pthread_process_shared pshared; };
+
+   type pthread_rwlockattr_t is record
+      pshared : int;
+   end record;
+   pragma Convention (C, pthread_rwlockattr_t);
+
+   --  From: /usr/include/i386-gnu/bits/rwlock.h:
+   --  struct __pthread_rwlock {
+   --  __pthread_spinlock_t __held;
+   --  __pthread_spinlock_t __lock;
+   --  int readers;
+   --  struct __pthread *readerqueue;
+   --  struct __pthread *writerqueue;
+   --  struct __pthread_rwlockattr *__attr;
+   --  void *__data; };
+
+   type pthread_rwlock_t is record
+      held        : int;
+      lock        : int;
+      readers     : int;
+      readerqueue : System.Address;
+      writerqueue : System.Address;
+      attr        : pthread_rwlockattr_t;
+      data        : int;
+   end record;
+   pragma Convention (C, pthread_rwlock_t);
+
+end System.OS_Interface;
Index: gcc-5-5.3.1/src/gcc/ada/gcc-interface/Makefile.in
===================================================================
--- gcc-5-5.3.1.orig/src/gcc/ada/gcc-interface/Makefile.in
+++ gcc-5-5.3.1/src/gcc/ada/gcc-interface/Makefile.in
@@ -1390,6 +1390,35 @@ ifeq ($(strip $(filter-out %86 kfreebsd%
   MISCLIB = -lutil
 endif
 
+# i[3456]86-pc-gnu i.e. GNU Hurd
+ifeq ($(strip $(filter-out %86 pc gnu,$(target_cpu) $(target_vendor) $(target_os))),)
+  LIBGNAT_TARGET_PAIRS = \
+  a-intnam.ads<a-intnam-freebsd.ads \
+  s-inmaop.adb<s-inmaop-posix.adb \
+  s-intman.adb<s-intman-posix.adb \
+  s-osinte.adb<s-osinte-gnu.adb \
+  s-osinte.ads<s-osinte-gnu.ads \
+  s-osprim.adb<s-osprim-posix.adb \
+  s-taprop.adb<s-taprop-posix.adb \
+  s-taspri.ads<s-taspri-posix.ads \
+  s-tpopsp.adb<s-tpopsp-posix-foreign.adb \
+  $(ATOMICS_TARGET_PAIRS) \
+  $(X86_TARGET_PAIRS) \
+  system.ads<system-freebsd-x86.ads
+
+  TOOLS_TARGET_PAIRS =  \
+    mlib-tgt-specific.adb<mlib-tgt-specific-linux.adb \
+    indepsw.adb<indepsw-gnu.adb
+
+  EXTRA_GNATRTL_NONTASKING_OBJS=g-sse.o g-ssvety.o
+
+  EH_MECHANISM=-gcc
+  THREADSLIB = -lpthread
+  GNATLIB_SHARED = gnatlib-shared-dual
+  GMEM_LIB = gmemlib
+  LIBRARY_VERSION := $(LIB_VERSION)
+endif
+
 ifeq ($(strip $(filter-out x86_64 kfreebsd%,$(target_cpu) $(target_os))),)
   LIBGNAT_TARGET_PAIRS = \
   a-intnam.ads<a-intnam-freebsd.ads \
