Port current code to python3

CMakeLists.txt

@@ -66,6 +66,12 @@ option(WITH_ANAKIN      "Compile with Anakin library"                   OFF)
 option(WITH_GRPC     "Use grpc as the default rpc framework"            ${WITH_DISTRIBUTE})
 option(WITH_BRPC_RDMA     "Use brpc rdma as the rpc protocal"           OFF)
 option(WITH_SYSTEM_BLAS   "Use system blas library"           OFF)
+option(PY_VERSION       "Compile PaddlePaddle with python3 support"     ${PY_VERSION})
+
+# PY_VERSION
+if(NOT PY_VERSION)
+  set(PY_VERSION 2.7)
+endif()
 
 # CMAKE_BUILD_TYPE
 if(NOT CMAKE_BUILD_TYPE)

cmake/external/python.cmake

@@ -18,8 +18,9 @@ ENDIF()
 
 INCLUDE(python_module)
 
-FIND_PACKAGE(PythonInterp 3.5)
-FIND_PACKAGE(PythonLibs 3.5)
+FIND_PACKAGE(PythonInterp ${PY_VERSION})
+FIND_PACKAGE(PythonLibs ${PY_VERSION})
+
 # Fixme: Maybe find a static library. Get SHARED/STATIC by FIND_PACKAGE.
 ADD_LIBRARY(python SHARED IMPORTED GLOBAL)
 SET_PROPERTY(TARGET python PROPERTY IMPORTED_LOCATION ${PYTHON_LIBRARIES})

paddle/scripts/paddle_build.sh

@@ -108,6 +108,7 @@ function cmake_gen() {
         -DWITH_CONTRIB=${WITH_CONTRIB:-ON}
         -DWITH_ANAKIN=${WITH_ANAKIN:-OFF}
         -DWITH_INFERENCE_DEMO=${WITH_INFERENCE_DEMO:-ON}
+        -DPY_VERSION=${PY_VERSION:-2.7}
     ========================================
 EOF
     # Disable UNITTEST_USE_VIRTUALENV in docker because
@@ -136,7 +137,8 @@ EOF
         -DCMAKE_EXPORT_COMPILE_COMMANDS=ON \
         -DWITH_CONTRIB=${WITH_CONTRIB:-ON} \
         -DWITH_ANAKIN=${WITH_ANAKIN:-OFF} \
-        -DWITH_INFERENCE_DEMO=${WITH_INFERENCE_DEMO:-ON}
+        -DWITH_INFERENCE_DEMO=${WITH_INFERENCE_DEMO:-ON} \
+        -DPY_VERSION=${PY_VERSION:-2.7}
 }
 
 function abort(){