diff --git a/paddle/fluid/lite/api/cxx_api.cc b/paddle/fluid/lite/api/cxx_api.cc
index 7c6ffccfa0bdab393c6870283834c76c5d1a2668..145d0a1a861018b0714f99cdf36253a2cab52104 100644
--- a/paddle/fluid/lite/api/cxx_api.cc
+++ b/paddle/fluid/lite/api/cxx_api.cc
@@ -61,5 +61,24 @@ const framework::proto::ProgramDesc &Predictor::program_desc() const {
   return program_desc_;
 }
 
+void Predictor::Build(const framework::proto::ProgramDesc &desc,
+                      const Place &prefer_place,
+                      const std::vector<Place> &valid_places) {
+  program_desc_ = desc;
+  Program program(desc, scope_, valid_places);
+
+  optimizer_.KernelPickPreferPlace(prefer_place);
+  core::KernelPickFactor factor;
+  factor.ConsiderTarget();
+  factor.ConsiderPrecision();
+  optimizer_.Run(std::move(program), valid_places, factor);
+  program_ = optimizer_.GenRuntimeProgram();
+}
+
+const lite::Tensor *Predictor::GetTensor(const std::string &name) const {
+  auto *var = program_->exec_scope()->FindVar(name);
+  return &var->Get<lite::Tensor>();
+}
+
 }  // namespace lite
 }  // namespace paddle
diff --git a/paddle/fluid/lite/api/cxx_api.h b/paddle/fluid/lite/api/cxx_api.h
index e7b74a04da25ba3d228aba78d9a5ce9d0909d708..5434bc18eb634a7c2136a64f4afdb490db92119d 100644
--- a/paddle/fluid/lite/api/cxx_api.h
+++ b/paddle/fluid/lite/api/cxx_api.h
@@ -42,18 +42,7 @@ class Predictor {
              const std::vector<Place>& valid_places);
 
   void Build(const framework::proto::ProgramDesc& desc,
-             const Place& prefer_place,
-             const std::vector<Place>& valid_places) {
-    program_desc_ = desc;
-    Program program(desc, scope_, valid_places);
-
-    optimizer_.KernelPickPreferPlace(prefer_place);
-    core::KernelPickFactor factor;
-    factor.ConsiderTarget();
-    factor.ConsiderPrecision();
-    optimizer_.Run(std::move(program), valid_places, factor);
-    program_ = optimizer_.GenRuntimeProgram();
-  }
+             const Place& prefer_place, const std::vector<Place>& valid_places);
 
   // Run the predictor for a single batch of data.
   void Run() { program_->Run(); }
@@ -66,10 +55,7 @@ class Predictor {
 
   // Return the program desc for debug.
   const framework::proto::ProgramDesc& program_desc() const;
-  const lite::Tensor* GetTensor(const std::string& name) const {
-    auto* var = program_->exec_scope()->FindVar(name);
-    return &var->Get<lite::Tensor>();
-  }
+  const lite::Tensor* GetTensor(const std::string& name) const;
 
   // This method is disabled in mobile, for unnecessary dependencies required.
   void SaveModel(const std::string& dir);
diff --git a/paddle/fluid/lite/utils/io.h b/paddle/fluid/lite/utils/io.h
index 4e64ee1d4e4b016fadf40167fb96557e96061fba..29044d580d4d734929ad34a0e5608133812207bf 100644
--- a/paddle/fluid/lite/utils/io.h
+++ b/paddle/fluid/lite/utils/io.h
@@ -14,9 +14,7 @@
 
 #pragma once
 
-#ifndef LITE_WITH_ARM
-#include <bits/stdc++.h>
-#endif
+#include <sys/stat.h>
 #include <fstream>
 #include <string>
 #include "paddle/fluid/lite/utils/cp_logging.h"
@@ -35,12 +33,14 @@ static bool IsFileExists(const std::string& path) {
 }
 
 // ARM mobile not support mkdir in C++
-#ifndef LITE_WITH_ARM
 static void MkDirRecur(const std::string& path) {
+#ifndef LITE_WITH_ARM
   CHECK_EQ(system(string_format("mkdir -p %s", path.c_str()).c_str()), 0)
       << "Cann't mkdir " << path;
-}
+#else  // On ARM
+  CHECK_NE(mkddir(path.c_str(), S_IRWXU), -1) << "Cann't mkdir " << path;
 #endif
+}
 
 }  // namespace lite
 }  // namespace paddle