Added support for NaCl IO to use the IRT Extension API.

native_client_sdk/src/libraries/nacl_io/kernel_wrap_dummy.cc

 // Copyright (c) 2013 The Chromium 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 "nacl_io/kernel_wrap.h" // IRT_EXT is turned on in this header.
+
 // The Chromium build system defines __linux__ even for native client builds,
 // so guard against __native_client__ being defined as well.
-#if defined(WIN32) || (defined(__linux__) && !defined(__native_client__))
+#if defined(WIN32) || (!defined(NACL_IO_IRT_EXT) && \

[binji, 2014/10/02 17:54:34]

I don't think you want this one. This file will only be included for host
builds, where the definition of NACL_IO_IRT_EXT will be irrelevant.

Oh, I see. You are defining NACL_IO_IRT_EXT dependently in kernel_wrap.h... I
think it might be nicer to have that logic in the source file, rather than
distributing between here and the kernel_wrap header.

[David Yen, 2014/10/02 18:23:49]

I'll revert this file, the !defined(__native_client__) check should be
sufficient to turn it off when NACL_IO_IRT_EXT is on.

[David Yen, 2014/10/02 18:26:15]

Note that NACL_IO_IRT_EXT is meant to be able to replace every kernel_wrap_**
file, so it should be shared across all the source files.

+                       defined(__linux__) && \
+                       !defined(__native_client__))
 
 #include <errno.h>
 
-#include "nacl_io/kernel_wrap.h"
 #include "nacl_io/kernel_wrap_real.h"
 
 // "real" functions, i.e. the unwrapped original functions. For Windows/Linux
 // host builds we don't wrap, so the real functions aren't accessible. In most
 // cases, we just fail.
 
 int _real_close(int fd) {
   return ENOSYS;
 }
 
@@ skipping 66 matching lines @@
 // so guard against __native_client__ being defined as well.
 #if defined(__linux__) && !defined(__native_client__)
 
 void kernel_wrap_init() {
 }
 
 void kernel_wrap_uninit() {
 }
 
 #endif