From 20147ace3f6d6b720d85a8e9501de7c3a93dd97c Mon Sep 17 00:00:00 2001
From: Zhou Wei <52485244+zhouwei25@users.noreply.github.com>
Date: Fri, 14 Aug 2020 21:35:25 +0800
Subject: [PATCH] fix_copy_if_different (#25868)

---
 paddle/fluid/pybind/CMakeLists.txt | 9 ++-------
 1 file changed, 2 insertions(+), 7 deletions(-)

diff --git a/paddle/fluid/pybind/CMakeLists.txt b/paddle/fluid/pybind/CMakeLists.txt
index b5165078cb1..318a45919af 100644
--- a/paddle/fluid/pybind/CMakeLists.txt
+++ b/paddle/fluid/pybind/CMakeLists.txt
@@ -71,13 +71,8 @@ if(WITH_PYTHON)
   set(tmp_impl_file ${impl_file}.tmp)
 
   if(WIN32)
-    add_custom_command(TARGET op_function_generator
-          POST_BUILD
-          COMMAND "${CMAKE_BINARY_DIR}/paddle/fluid/pybind/${CMAKE_BUILD_TYPE}/op_function_generator"
-              "${tmp_impl_file}"
-          COMMAND ${CMAKE_COMMAND} -E copy_if_different ${tmp_impl_file} ${impl_file}
-          COMMENT "copy_if_different ${impl_file}"
-          VERBATIM
+    add_custom_command(TARGET op_function_generator POST_BUILD
+          COMMAND ${CMAKE_BINARY_DIR}/paddle/fluid/pybind/${CMAKE_BUILD_TYPE}/op_function_generator ${impl_file}
     )
 
     if(${CBLAS_PROVIDER} STREQUAL MKLML)
-- 
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