Created by: luotao1

When gcc version is 4.8.3: https://paddleci.ngrok.io/viewLog.html?buildId=35590&buildTypeId=Manylinux1_Cuda80cudnn5cp27cp27mu&tab=buildLog&_focus=3589

• a lot of -Werror=unused-result

In file included from /home/luotao02/Paddle/build/third_party/mkldnn/src/extern_mkldnn/src/cpu/cpu_barrier.hpp:22:0,
                 from /home/luotao02/Paddle/build/third_party/mkldnn/src/extern_mkldnn/src/cpu/cpu_barrier.cpp:19:
/home/luotao02/Paddle/build/third_party/mkldnn/src/extern_mkldnn/src/cpu/jit_generator.hpp: In member function ‘void mkldnn::impl::cpu::jit_generator::dump_code(const uint8*) const’:
/home/luotao02/Paddle/build/third_party/mkldnn/src/extern_mkldnn/src/cpu/jit_generator.hpp:719:47: error: ignoring return value of ‘size_t fwrite(const void*, size_t, size_t, FILE*)’, declared with attribute warn_unused_result [-Werror=unused-result]
                 fwrite(code, getSize(), 1, fp);
                                               ^

• after fix -Werror=unused-result, there is -Werror=missing-field-initializers

In file included from /home/luotao02/Paddle/paddle/fluid/platform/device_context.h:26:0,
                 from /home/luotao02/Paddle/paddle/fluid/platform/device_context.cc:11:
/home/luotao02/Paddle/build/third_party/install/mkldnn/include/mkldnn.hpp: In function ‘mkldnn::memory::desc mkldnn::zero_md()’:
/home/luotao02/Paddle/build/third_party/install/mkldnn/include/mkldnn.hpp:796:31: error: missing initializer for member ‘mkldnn_memory_desc_t::primitive_kind’ [-Werror=missing-field-initializers]
     mkldnn_memory_desc_t zero{};
                               ^
/home/luotao02/Paddle/build/third_party/install/mkldnn/include/mkldnn.hpp:796:31: error: missing initializer for member ‘mkldnn_memory_desc_t::ndims’ [-Werror=missing-field-initializers]
/home/luotao02/Paddle/build/third_party/install/mkldnn/include/mkldnn.hpp:796:31: error: missing initializer for member ‘mkldnn_memory_desc_t::dims’ [-Werror=missing-field-initializers]
/home/luotao02/Paddle/build/third_party/install/mkldnn/include/mkldnn.hpp:796:31: error: missing initializer for member ‘mkldnn_memory_desc_t::data_type’ [-Werror=missing-field-initializers]
/home/luotao02/Paddle/build/third_party/install/mkldnn/include/mkldnn.hpp:796:31: error: missing initializer for member ‘mkldnn_memory_desc_t::format’ [-Werror=missing-field-initializers]
/home/luotao02/Paddle/build/third_party/install/mkldnn/include/mkldnn.hpp:796:31: error: missing initializer for member ‘mkldnn_memory_desc_t::layout_desc’ [-Werror=missing-field-initializers]
cc1plus: all warnings being treated as errors
make[2]: *** [paddle/fluid/platform/CMakeFiles/device_context.dir/device_context.cc.o] Error 1
make[1]: *** [paddle/fluid/platform/CMakeFiles/device_context.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....
Linking CXX static library libpaddle_test_util.a
[ 20%] Built target paddle_test_util
make: *** [all] Error 2