Non-SFI mode: Add Linux asynchronous signal support

src/untrusted/pthread/nc_init_private.c

 /*
  * Copyright (c) 2012 The Native Client Authors. All rights reserved.
  * Use of this source code is governed by a BSD-style license that can be
  * found in the LICENSE file.
  */
 
 #include "native_client/src/untrusted/irt/irt_interfaces.h"
 #include "native_client/src/untrusted/nacl/nacl_irt.h"
 #include "native_client/src/untrusted/nacl/syscall_bindings_trampoline.h"
 #include "native_client/src/untrusted/pthread/pthread_internal.h"
 
 static int nacl_irt_thread_create(void (*start_func)(void), void *stack,
-                                  void *thread_ptr) {
+                                  void *thread_ptr, nacl_irt_tid_t *tid) {
 #if defined(NACL_IN_IRT)
   /*
    * We want the first TLS to point to an unmapped location.  The
    * thread_create() syscall rejects a zero argument for the first
    * TLS, so use a non-zero value in the unmapped first 64k page.
    */
   void *user_tls = (void *) 0x1000;
   return -NACL_SYSCALL(thread_create)((void *) start_func, stack,
                                       user_tls, thread_ptr);
 #else
   return -NACL_SYSCALL(thread_create)((void *) start_func, stack,
                                       thread_ptr, 0);
 #endif
 }
 
 static void nacl_irt_thread_exit(int32_t *stack_flag) {
   NACL_SYSCALL(thread_exit)(stack_flag);
   __builtin_trap();
 }
 
 static int nacl_irt_thread_nice(const int nice) {
   return -NACL_SYSCALL(thread_nice)(nice);
 }
 
 void __nc_initialize_interfaces(void) {
-  const struct nacl_irt_thread init = {
+  const struct nacl_irt_thread_v0_2 init = {
     nacl_irt_thread_create,
     nacl_irt_thread_exit,
     nacl_irt_thread_nice,
   };
   __libnacl_irt_thread = init;
 }