add compile guard

Author: zhiqiu

paddle/fluid/pybind/imperative.cc

@@ -1207,12 +1207,14 @@ void BindImperative(py::module *m_ptr) {
               auto p = obj.cast<platform::CUDAPlace *>();
               self.SetExpectedPlace(*p);
 
-              // NOTE(zhiqiu): When switching cuda place, we need to set the
-              // cuda device id.
-              // Otherwise, some cuda API may be launched at other cuda place,
-              // which may cost hundreds of MB of GPU memory due to the cuda
-              // lib.
+// NOTE(zhiqiu): When switching cuda place, we need to set the
+// cuda device id.
+// Otherwise, some cuda API may be launched at other cuda place,
+// which may cost hundreds of MB of GPU memory due to the cuda
+// lib.
+#ifdef PADDLE_WITH_CUDA
               platform::SetDeviceId(p->device);
+#endif
               VLOG(4) << "Tracer(" << &self << ")"
                       << " set expected place " << *p;
             } else if (py::isinstance<platform::XPUPlace>(obj)) {
@@ -1234,9 +1236,11 @@ void BindImperative(py::module *m_ptr) {
               auto p = obj.cast<platform::Place *>();
               self.SetExpectedPlace(*p);
               if (platform::is_gpu_place(*p)) {
-                // NOTE(zhiqu): same as obj is CUDAPlace.
+// NOTE(zhiqu): same as obj is CUDAPlace.
+#ifdef PADDLE_WITH_CUDA
                 platform::SetDeviceId(
                     BOOST_GET_CONST(platform::CUDAPlace, *p).device);
+#endif
               }
               VLOG(4) << "Tracer(" << &self << ")"
                       << " set expected place " << *p;