From 63baf329e7f343ab03f20e71e1cb1ce724a1aa8e Mon Sep 17 00:00:00 2001
From: Timo Heister <timo.heister@gmail.com>
Date: Wed, 5 Oct 2016 16:30:30 -0400
Subject: [PATCH] disable FE_enriched without cxx14

---
 include/deal.II/fe/fe_enriched.h | 8 ++++++--
 source/fe/fe_enriched.cc         | 5 +++--
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/include/deal.II/fe/fe_enriched.h b/include/deal.II/fe/fe_enriched.h
index b3131e46da..6ed3a44c6d 100644
--- a/include/deal.II/fe/fe_enriched.h
+++ b/include/deal.II/fe/fe_enriched.h
@@ -18,7 +18,11 @@
 
 #include <deal.II/base/config.h>
 
-#ifdef DEAL_II_WITH_CXX11
+// We require c++14 here even though we only need features that are part of
+// c++11, but it turns out that gcc 4.6.x and 4.7.x don't support c++11
+// features like delegating constructors.
+
+#ifdef DEAL_II_WITH_CXX14
 #include <deal.II/fe/fe.h>
 #include <deal.II/fe/fe_system.h>
 #include <deal.II/fe/fe_nothing.h>
@@ -607,7 +611,7 @@ private:
 //}
 DEAL_II_NAMESPACE_CLOSE
 
-#endif // CXX11
+#endif // CXX14
 
 #endif // dealii__fe_enriched_h
 
diff --git a/source/fe/fe_enriched.cc b/source/fe/fe_enriched.cc
index 537436d17b..4ba7ebfe88 100644
--- a/source/fe/fe_enriched.cc
+++ b/source/fe/fe_enriched.cc
@@ -13,7 +13,8 @@
 //
 // ---------------------------------------------------------------------
 #include <deal.II/fe/fe_enriched.h>
-#ifdef DEAL_II_WITH_CXX11
+
+#ifdef DEAL_II_WITH_CXX14
 
 #include <deal.II/fe/fe_tools.h>
 
@@ -921,4 +922,4 @@ InternalData::get_fe_output_object (const unsigned int base_no) const
 
 DEAL_II_NAMESPACE_CLOSE
 
-#endif // CXX11
+#endif // CXX14
-- 
2.39.5