fix cuda build

Author: jeffdaily

faiss/gpu/impl/PQCodeLoad.cuh

@@ -47,9 +47,6 @@ inline __device__ unsigned int getByte(uint64_t v, int pos, int width) {
     return getBitfield(v, pos, width);
 }
 
-// template <int NumSubQuantizers>
-// struct LoadCode32 {};
-
 #ifdef USE_ROCM
 
 template <int NumSubQuantizers>
@@ -381,6 +378,9 @@ struct LoadCode32<96> {
 
 #else // USE_ROCM
 
+template <int NumSubQuantizers>
+struct LoadCode32 {};
+
 template <>
 struct LoadCode32<1> {
     static inline __device__ void load(

faiss/gpu/utils/PtxUtils.cuh

@@ -8,7 +8,9 @@
 #pragma once
 
 #include <cuda.h>
+#ifdef USE_ROCM
 #include <device_functions.h>
+#endif
 
 namespace faiss {
 namespace gpu {