fix(Cpu): fix cpu compile and unittest

test=develop

Author: reyoung

paddle/fluid/pybind/pybind.cc

@@ -46,6 +46,7 @@ limitations under the License. */
 #include "paddle/fluid/memory/allocation/allocator_strategy.h"
 #include "paddle/fluid/operators/activation_op.h"
 #include "paddle/fluid/operators/reader/lod_tensor_blocking_queue.h"
+#include "paddle/fluid/platform/cpu_info.h"
 #include "paddle/fluid/platform/enforce.h"
 #include "paddle/fluid/platform/init.h"
 #include "paddle/fluid/platform/place.h"
@@ -95,6 +96,9 @@ bool IsCompiledWithDIST() {
 }
 
 PYBIND11_PLUGIN(core) {
+  // Not used, just make sure cpu_info.cc is linked.
+  paddle::platform::CpuTotalPhysicalMemory();
+
   paddle::memory::allocation::UseAllocatorStrategyGFlag();
   py::module m("core", "C++ core of PaddlePaddle");
 

python/paddle/fluid/tests/unittests/CMakeLists.txt

@@ -23,7 +23,9 @@ if(NOT WITH_DISTRIBUTE)
     LIST(REMOVE_ITEM TEST_OPS test_dist_text_classification)
 endif(NOT WITH_DISTRIBUTE)
 
-if (${CUDNN_MAJOR_VERSION} VERSION_LESS 7)
+if (NOT ${WITH_GPU})
+    LIST(REMOVE_ITEM TEST_OPS test_conv2d_fusion_op)
+elseif(${CUDNN_MAJOR_VERSION} VERSION_LESS 7)
     LIST(REMOVE_ITEM TEST_OPS test_conv2d_fusion_op)
 endif()