Merge pull request #1722 from NVIDIA/bug/temp_alloc_error

Reference CUDA back end functions only when CUDA back end is enabled

Author: alliepiper

thrust/detail/allocator/temporary_allocator.inl

@@ -50,11 +50,15 @@ __host__ __device__
     // note that we pass cnt to deallocate, not a value derived from result.second
     deallocate(result.first, cnt);
 
+#if THRUST_DEVICE_SYSTEM == THRUST_DEVICE_SYSTEM_CUDA
     NV_IF_TARGET(NV_IS_HOST, (
       throw thrust::system::detail::bad_alloc("temporary_buffer::allocate: get_temporary_buffer failed");
     ), ( // NV_IS_DEVICE
       thrust::system::cuda::detail::terminate_with_message("temporary_buffer::allocate: get_temporary_buffer failed");
     ));
+#else
+    throw thrust::system::detail::bad_alloc("temporary_buffer::allocate: get_temporary_buffer failed");
+#endif
   } // end if
 
   return result.first;