fix compile warning in inference related codes

cmake/external/anakin.cmake

@@ -7,7 +7,17 @@ set(ANAKIN_INSTALL_DIR "${THIRD_PARTY_PATH}/install/anakin" CACHE PATH
 set(ANAKIN_INCLUDE "${ANAKIN_INSTALL_DIR}" CACHE STRING "root of Anakin header files")
 set(ANAKIN_LIBRARY "${ANAKIN_INSTALL_DIR}" CACHE STRING "path of Anakin library")
 
-set(ANAKIN_COMPILE_EXTRA_FLAGS -Wno-error=unused-variable -Wno-error=format-extra-args -Wno-error=comment -Wno-error=format -Wno-error=switch -Wno-error=return-type -Wno-error=non-virtual-dtor -Wno-reorder -Wno-error=cpp)
+set(ANAKIN_COMPILE_EXTRA_FLAGS 
+    -Wno-error=unused-variable -Wno-unused-variable 
+    -Wno-error=format-extra-args -Wno-format-extra-args
+    -Wno-error=comment -Wno-comment 
+    -Wno-error=format -Wno-format 
+    -Wno-error=switch -Wno-switch
+    -Wno-error=return-type -Wno-return-type 
+    -Wno-error=non-virtual-dtor -Wno-non-virtual-dtor
+    -Wno-sign-compare
+    -Wno-reorder 
+    -Wno-error=cpp)
 
 set(ANAKIN_LIBRARY_URL "https://github.com/pangge/Anakin/releases/download/3.0/anakin_release_simple.tar.gz")
 

paddle/contrib/inference/test_paddle_inference_api_impl.cc

@@ -249,7 +249,7 @@ void MainThreadsImageClassification(bool use_gpu) {
       const size_t len = local_outputs[0].data.length();
       float* data = static_cast<float*>(local_outputs[0].data.data());
       float* ref_data = refs[tid].data<float>();
-      EXPECT_EQ(refs[tid].numel(), len / sizeof(float));
+      EXPECT_EQ((size_t)refs[tid].numel(), len / sizeof(float));
       for (int i = 0; i < refs[tid].numel(); ++i) {
         EXPECT_NEAR(ref_data[i], data[i], 1e-3);
       }

paddle/fluid/inference/analysis/fluid_to_data_flow_graph_pass_tester.cc

@@ -27,7 +27,7 @@ TEST_F(DFG_Tester, Init) {
   DataFlowGraph graph;
   pass.Run(&graph);
   // Analysis is sensitive to ProgramDesc, careful to change the original model.
-  ASSERT_EQ(graph.nodes.size(), 37);
+  ASSERT_EQ(graph.nodes.size(), 37UL);
   pass.Finalize();
   LOG(INFO) << '\n' << graph.DotString();
 }

paddle/fluid/inference/analysis/subgraph_splitter_tester.cc

@@ -82,7 +82,7 @@ TEST_F(DFG_Tester, Fuse) {
 
   // At least one nodes should be deleted.
   ASSERT_EQ(dfg.nodes.size(), count0 + 1);  // added a new FunctionBlock
-  ASSERT_EQ(6UL, count1);
+  ASSERT_EQ(6, count1);
 }
 
 }  // namespace analysis