提交 8605544c 编写于 作者: Y Yu Yang

Add some comments to compiler.h

上级 9bc12034
...@@ -10,7 +10,10 @@ See the License for the specific language governing permissions and ...@@ -10,7 +10,10 @@ See the License for the specific language governing permissions and
limitations under the License. */ limitations under the License. */
#pragma once #pragma once
/**
* This header defines some useful attribute by each compiler. It is the
* abstract layer of compilers.
*/
#ifdef __GNUC__ #ifdef __GNUC__
#define GCC_VERSION \ #define GCC_VERSION \
(__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__) (__GNUC__ * 10000 + __GNUC_MINOR__ * 100 + __GNUC_PATCHLEVEL__)
...@@ -18,6 +21,11 @@ limitations under the License. */ ...@@ -18,6 +21,11 @@ limitations under the License. */
#define GCC_VERSION #define GCC_VERSION
#endif #endif
/**
* __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.
*/
#if GCC_VERSION >= 30400 #if GCC_VERSION >= 30400
#define __must_check __attribute__((warn_unused_result)) #define __must_check __attribute__((warn_unused_result))
#else #else
......
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