try fix py2

test=develop

paddle/fluid/framework/python_headers.h

+/* Copyright (c) 2018 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
+
+// workaround for Python 2 issue: https://bugs.python.org/issue17120
+#pragma push_macro("_XOPEN_SOURCE")
+#pragma push_macro("_POSIX_C_SOURCE")
+#undef _XOPEN_SOURCE
+#undef _POSIX_C_SOURCE
+
+#include <Python.h>
+#include "pybind11/pybind11.h"
+
+#pragma pop_macro("_XOPEN_SOURCE")
+#pragma pop_macro("_POSIX_C_SOURCE")

paddle/fluid/imperative/layer.h

@@ -14,15 +14,18 @@
 
 #pragma once
 
-#include <map>
-#include <string>
-#include <vector>
+// clang-format off
+#include "paddle/fluid/framework/python_headers.h"
+// clang-format on
+
+#include <map>     // NOLINT
+#include <string>  // NOLINT
+#include <vector>  // NOLINT
 
 #include "paddle/fluid/framework/op_desc.h"
 #include "paddle/fluid/framework/operator.h"
 #include "paddle/fluid/framework/var_desc.h"
 #include "paddle/fluid/platform/enforce.h"
-#include "pybind11/pybind11.h"
 
 #include "paddle/fluid/imperative/type_defs.h"
 

paddle/fluid/imperative/tracer.h

@@ -14,6 +14,7 @@
 
 #pragma once
 
+#include <map>
 #include <string>
 #include <vector>
 
@@ -39,11 +40,10 @@ class Tracer {
 
   virtual ~Tracer() {}
 
-  void Trace(
-      OpBase* op,
-      const std::map<std::string, std::vector<VarBase*>>& inputs,   // NOLINT
-      const std::map<std::string, std::vector<VarBase*>>& outputs,  // NOLINT
-      framework::BlockDesc* block, const bool stop_gradient = false);
+  void Trace(OpBase* op,
+             const std::map<std::string, std::vector<VarBase*>>& inputs,
+             const std::map<std::string, std::vector<VarBase*>>& outputs,
+             framework::BlockDesc* block, const bool stop_gradient = false);
 
   std::vector<VarBase*> PyTrace(OpBase* op, const std::vector<VarBase*>& inputs,
                                 bool stop_gradient = false);

paddle/fluid/operators/py_func_op.cc

@@ -13,10 +13,10 @@
 // limitations under the License.
 
 #include "paddle/fluid/operators/py_func_op.h"
+
 #include <set>
 #include <string>
 #include <vector>
-#include "Python.h"
 #include "paddle/fluid/framework/op_registry.h"
 
 namespace paddle {

paddle/fluid/operators/py_func_op.h

@@ -13,8 +13,7 @@
 // limitations under the License.
 
 #pragma once
-
-#include "pybind11/pybind11.h"
+#include "paddle/fluid/framework/python_headers.h"
 
 namespace paddle {
 namespace operators {