Only instantiate VectorizedArrAy::n_array_elements for vectorization enabled

diff --git a/source/base/vectorization.cc b/source/base/vectorization.cc
index 5876d07d2db9cd9545efbd11cae8bbd2220e74b8..1cc3fe6de66728165452a348f669e8bf497c87f7 100644 (file)
--- a/source/base/vectorization.cc
+++ b/source/base/vectorization.cc
@@ -17,7 +17,9 @@
 
 DEAL_II_NAMESPACE_OPEN
 
+#if DEAL_II_COMPILER_VECTORIZATION_LEVEL >= 1
 const unsigned int VectorizedArray<double>::n_array_elements;
 const unsigned int VectorizedArray<float>::n_array_elements;
+#endif
 
 DEAL_II_NAMESPACE_CLOSE