add more macros

Signed-off-by: Fedorov, Andrey <andrey.fedorov@intel.com>

Author: andreyfe1

sycl/include/CL/sycl/detail/group_sort_impl.hpp

@@ -10,6 +10,7 @@
 
 #pragma once
 
+#if __cplusplus >= 201703L
 #include <CL/sycl/detail/helpers.hpp>
 
 #ifdef __SYCL_DEVICE_ONLY__
@@ -252,3 +253,4 @@ void merge_sort(Group group, Iter first, const std::size_t n, Compare comp,
 } // namespace sycl
 } // __SYCL_INLINE_NAMESPACE(cl)
 #endif
+#endif // __cplusplus >=201703L

sycl/include/sycl/ext/oneapi/experimental/group_helpers_sorters.hpp

@@ -8,6 +8,7 @@
 
 #pragma once
 
+#if __cplusplus >= 201703L
 #include <CL/sycl/detail/group_sort_impl.hpp>
 
 __SYCL_INLINE_NAMESPACE(cl) {
@@ -97,3 +98,4 @@ template <typename Compare = std::less<>> class default_sorter {
 } // namespace ext
 } // namespace sycl
 } // __SYCL_INLINE_NAMESPACE(cl)
+#endif // __cplusplus >=201703L

sycl/include/sycl/ext/oneapi/group_sort.hpp

@@ -8,6 +8,7 @@
 
 #pragma once
 
+#if __cplusplus >= 201703L
 #include <CL/sycl/detail/defines_elementary.hpp>
 #include <CL/sycl/detail/group_sort_impl.hpp>
 #include <CL/sycl/detail/type_traits.hpp>
@@ -141,3 +142,4 @@ joint_sort(experimental::group_with_scratchpad<Group, Extent> exec, Iter first,
 } // namespace ext
 } // namespace sycl
 } // __SYCL_INLINE_NAMESPACE(cl)
+#endif // __cplusplus >=201703L