From 93bbcb7198ab15c77039e57c50a4f6021271816a Mon Sep 17 00:00:00 2001
From: Shehzan Mohammed <shehzan@arrayfire.com>
Date: Wed, 14 Dec 2016 16:25:53 -0500
Subject: [PATCH] Remove support for sparse conversions for CUDA 6.5 and older

---
 src/backend/cuda/sparse.cu | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/src/backend/cuda/sparse.cu b/src/backend/cuda/sparse.cu
index 96e430285c..1d13f94ed0 100644
--- a/src/backend/cuda/sparse.cu
+++ b/src/backend/cuda/sparse.cu
@@ -363,6 +363,8 @@ Array<T> sparseConvertStorageToDense(const SparseArray<T> &in)
     return dense;
 }
 
+// Some of the API used here is available only in CUDA 7 or newer
+#if CUDA_VERSION >= 7000
 template<typename T, af_storage dest, af_storage src>
 SparseArray<T> sparseConvertStorageToStorage(const SparseArray<T> &in)
 {
@@ -475,6 +477,14 @@ SparseArray<T> sparseConvertStorageToStorage(const SparseArray<T> &in)
 
     return converted;
 }
+#else // CUDA 6.5 and older (older than 7)
+template<typename T, af_storage dest, af_storage src>
+SparseArray<T> sparseConvertStorageToStorage(const SparseArray<T> &in)
+{
+    AF_ERROR("Sparse storage format conversions are not supported for CUDA 6.5 or older",
+             AF_ERR_NOT_SUPPORTED);
+}
+#endif // CUDA_VERSION >= 7000
 
 #define INSTANTIATE_TO_STORAGE(T, S)                                                                        \
     template SparseArray<T> sparseConvertStorageToStorage<T, S, AF_STORAGE_CSR>(const SparseArray<T> &in);  \