From 47ef2df01ae26d319e8119b550f57f1936fec73e Mon Sep 17 00:00:00 2001
From: Xin Pan <panxin.grad@gmail.com>
Date: Fri, 11 Jan 2019 21:47:18 +0800
Subject: [PATCH] polish

test=develop
---
 paddle/fluid/imperative/layer.cc | 3 +++
 paddle/fluid/imperative/layer.h  | 4 ++--
 2 files changed, 5 insertions(+), 2 deletions(-)

diff --git a/paddle/fluid/imperative/layer.cc b/paddle/fluid/imperative/layer.cc
index aaafb4e87f4..c0a337a2b5a 100644
--- a/paddle/fluid/imperative/layer.cc
+++ b/paddle/fluid/imperative/layer.cc
@@ -27,6 +27,9 @@
 namespace paddle {
 namespace imperative {
 
+const char* PyLayer::kFwdInp = PyLayer::kFwdInp;
+const char* PyLayer::kFwdOut = PyLayer::kFwdOut;
+
 std::map<int, py::object> py_funcs_;
 
 using framework::Variable;
diff --git a/paddle/fluid/imperative/layer.h b/paddle/fluid/imperative/layer.h
index 14d89ca40ed..34aa701c5b9 100644
--- a/paddle/fluid/imperative/layer.h
+++ b/paddle/fluid/imperative/layer.h
@@ -200,8 +200,8 @@ class PyLayer {
  public:
   virtual ~PyLayer() {}
 
-  static constexpr char* kFwdInp = "X";
-  static constexpr char* kFwdOut = "Out";
+  static const char* kFwdInp;
+  static const char* kFwdOut;
 
   static void RegisterFunc(int func_id, const py::object& py_func);
 
-- 
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