Force internal linkage of an internal FETools function

diff --git a/include/deal.II/fe/fe_tools.templates.h b/include/deal.II/fe/fe_tools.templates.h
index e0daa228e9750f9d16ef7189588b6735a1592aed..36b5665eb1a6a7095a236b7760a4e984413da162 100644 (file)
--- a/include/deal.II/fe/fe_tools.templates.h
+++ b/include/deal.II/fe/fe_tools.templates.h
@@ -1303,7 +1303,7 @@ namespace FETools
       // running, there are no thread-safety issues here. since this is
       // compiled for all dimensions at once, need to create objects for
       // each dimension and then separate between them further down
-      std::array<
+      inline std::array<
         std::array<std::map<std::string, std::unique_ptr<const Subscriptor>>,
                    4>,
         4> &