Merge branch 'issue/updated_dune_2-7' into 'master'

dune 2.7 updated some preconditioners in istl such that some precompiler files had to be fixed

See merge request !119

src/amdis/linearalgebra/istl/precompiled/Preconditioners.cpp

@@ -7,7 +7,9 @@
 namespace Dune
 {
   template class SeqJac<Precompiled::Matrix, Precompiled::Vector, Precompiled::Vector>;
+#if DUNE_VERSION_LT(DUNE_ISTL,2,7)
   template class SeqGS<Precompiled::Matrix, Precompiled::Vector, Precompiled::Vector>;
+#endif
   template class SeqSOR<Precompiled::Matrix, Precompiled::Vector, Precompiled::Vector>;
   template class SeqSSOR<Precompiled::Matrix, Precompiled::Vector, Precompiled::Vector>;
   template class Richardson<Precompiled::Vector, Precompiled::Vector>;

src/amdis/linearalgebra/istl/precompiled/Preconditioners.hpp

+#include <dune/common/version.hh>
 #include <dune/istl/preconditioners.hh>
 #include <dune/istl/novlpschwarz.hh>
 #include <dune/istl/schwarz.hh>
@@ -7,7 +8,9 @@
 namespace Dune
 {
   extern template class SeqJac<Precompiled::Matrix, Precompiled::Vector, Precompiled::Vector>;
+#if DUNE_VERSION_LT(DUNE_ISTL,2,7)
   extern template class SeqGS<Precompiled::Matrix, Precompiled::Vector, Precompiled::Vector>;
+#endif
   extern template class SeqSOR<Precompiled::Matrix, Precompiled::Vector, Precompiled::Vector>;
   extern template class SeqSSOR<Precompiled::Matrix, Precompiled::Vector, Precompiled::Vector>;
   extern template class Richardson<Precompiled::Vector, Precompiled::Vector>;