Remove must_check in paddle::platform

paddle/platform/CMakeLists.txt

@@ -2,4 +2,3 @@ nv_test(cuda_test SRCS cuda_test.cu)
 
 cc_library(place SRCS place.cc)
 cc_test(place_test SRCS place_test.cc DEPS place glog gflags)
-cc_test(must_check_test SRCS must_check_test.cc)

paddle/platform/must_check.h

-/* Copyright (c) 2016 PaddlePaddle Authors. All Rights Reserved.
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-    http://www.apache.org/licenses/LICENSE-2.0
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License. */
-
-#pragma once
-/**
- * __must_check macro. It make the function's return value must be used,
- * otherwise it will raise a compile warning. And also Paddle treat all compile
- * warnings as errors.
- */
-#ifdef __GNUC__
-#if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= 30400
-#define __must_check __attribute__((warn_unused_result))
-#else
-#define __must_check
-#endif
-#else
-#define __must_check
-#endif

paddle/platform/must_check_test.cc

-#include <gtest/gtest.h>
-#include <paddle/platform/must_check.h>
-
-int __must_check SomeFunctionMustCheck() { return 0; }
-
-TEST(MustCheck, all) {
-  //  This line should not be compiled, because the
-  //  return value of SomeFunctionMustCheck marked as __must_check
-  //  SomeFunctionMustCheck();
-}
\ No newline at end of file

paddle/utils/Error.h

@@ -19,7 +19,21 @@ limitations under the License. */
 #include <stdio.h>
 #include <memory>
 #include <string>
-#include "paddle/platform/must_check.h"
+
+/**
+ * __must_check macro. It make the function's return value must be used,
+ * otherwise it will raise a compile warning. And also Paddle treat all compile
+ * warnings as errors.
+ */
+#ifdef __GNUC__
+#if (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) >= 30400
+#define __must_check __attribute__((warn_unused_result))
+#else
+#define __must_check
+#endif
+#else
+#define __must_check
+#endif
 
 namespace paddle {