fix gpu build error

paddle/framework/executor.cc

@@ -69,10 +69,13 @@ void GraphView::Initialize(const ProgramDesc* pdesc) {
 
 struct Device {
   platform::CPUDeviceContext* cpu_device_context;
+#ifndef PADDLE_ONLY_CPU
+  platform::CUDADeviceContext* cuda_device_context;
+#endif
+
 #ifndef PADDLE_ONLY_CPU
   Device(platform::CPUDeviceContext* cpu, platform::CUDADeviceContext* gpu)
       : cpu_device_context(cpu), cuda_device_context(gpu) {}
-  platform::CDUADeviceContext* cuda_device_context;
 #else
   explicit Device(platform::CPUDeviceContext* cpu) : cpu_device_context(cpu) {}
 #endif
@@ -126,10 +129,16 @@ platform::CUDADeviceContext* GetCUDADeviceContext(
 Device* GetDevice(const platform::Place& place) {
   platform::CPUPlace cpu_place;
 #ifndef PADDLE_ONLY_CPU
-  platform::GPUPlace gpu_place = boost::get<platform::GPUPlace>(place);
-  static std::unique_ptr<Device> g_device = make_unique<Device>(
-      GetCPUDeviceContext(cpu_place), GetCUDADeviceContext(gpu_place));
-  return g_device.get();
+  if (platform::is_gpu_place(place)) {
+    platform::GPUPlace gpu_place = boost::get<platform::GPUPlace>(place);
+    static std::unique_ptr<Device> g_device = make_unique<Device>(
+        GetCPUDeviceContext(cpu_place), GetCUDADeviceContext(gpu_place));
+    return g_device.get();
+  } else {
+    static std::unique_ptr<Device> g_device =
+        make_unique<Device>(GetCPUDeviceContext(cpu_place), nullptr);
+    return g_device.get();
+  }
 #else
   static std::unique_ptr<Device> g_device =
       make_unique<Device>(GetCPUDeviceContext(cpu_place));
@@ -153,7 +162,9 @@ void ExecutorImpl::Run() {
   scope_->NewVar();
   device_->cpu_device_context->Wait();
 #ifndef PADDLE_ONLY_CPU
-  device_->cuda_device_context->Wait();
+  if (device_->cuda_device_context) {
+    device_->cuda_device_context->Wait();
+  }
 #endif
 }