modified nacl_sync.h to have NACL_WUR for all functions that return a

src/include/nacl_compiler_annotations.h

+/*
+ * Copyright (c) 2011 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.
+ */
+
+#ifndef NATIVE_CLIENT_SRC_INCLUDE_NACL_COMPILER_ANNOTATIONS_H_
+#define NATIVE_CLIENT_SRC_INCLUDE_NACL_COMPILER_ANNOTATIONS_H_
+
+/* MSVC supports "inline" only in C++ */
+#if NACL_WINDOWS
+# define INLINE __forceinline
+#else
+# define INLINE __inline__
+#endif
+
+#if NACL_WINDOWS
+# define DLLEXPORT __declspec(dllexport)
+#elif defined(NACL_LINUX) || defined(NACL_OSX)
+# define DLLEXPORT __attribute__ ((visibility("default")))
+#elif defined(__native_client__)
+/* do nothing */
+#else
+# error "what platform?"
+#endif
+
+#if NACL_WINDOWS
+# define ATTRIBUTE_FORMAT_PRINTF(m, n)
+#else
+# define ATTRIBUTE_FORMAT_PRINTF(m, n) __attribute__((format(printf, m, n)))
+#endif
+
+#if NACL_WINDOWS
+# define UNREFERENCED_PARAMETER(P) (P)
+#else
+# define UNREFERENCED_PARAMETER(P) do { (void) P; } while (0)
+#endif
+
+#if NACL_WINDOWS
+# define NORETURN __declspec(noreturn)
+#else
+# define NORETURN __attribute__((noreturn))  /* assumes gcc */
+# define _cdecl /* empty */
+#endif
+
+#if NACL_WINDOWS
+# define THREAD __declspec(thread)
+#else
+# define THREAD __thread
+# define WINAPI
+#endif
+
+#if NACL_WINDOWS
+# define NACL_WUR
+#else
+# define NACL_WUR __attribute__((__warn_unused_result__))
+#endif
+
+#endif