update pybind.h source dir

CMakeLists.txt

@@ -216,6 +216,8 @@ endif(WITH_GOLANG)
 
 set(PADDLE_PYTHON_BUILD_DIR "${CMAKE_CURRENT_BINARY_DIR}/python/build")
 
+message(STATUS "CMAKE_CURRENT_BINARY_DIR: ${CMAKE_CURRENT_BINARY_DIR}")
+
 set(CMAKE_CXX_FLAGS_RELWITHDEBINFO "-O3 -g -DNDEBUG")
 set(CMAKE_C_FLAGS_RELWITHDEBINFO "-O3 -g -DNDEBUG")
 

cmake/inference_lib.cmake

@@ -150,7 +150,7 @@ copy(string_lib
 
 set(module "pybind")
 copy(pybind_lib
-  SRCS ${src_dir}/${module}/pybind.h
+  SRCS ${CMAKE_CURRENT_BINARY_DIR}/paddle/fluid/${module}/pybind.h
   DSTS ${dst_dir}/${module}
 )