hide UmfpackRunner, if umfpack is not available

dune/amdis/linear_algebra/mtl/BITL_Solver.hpp

@@ -30,9 +30,11 @@ namespace AMDiS
       = typename LinearSolver<Matrix, Vector, 
           KrylovRunner<ITLSolver, Matrix, BaseVector_t<Vector>>>::Creator;
     
+#ifdef HAVE_UMFPACK
     using UmfpackSolverCreator
       = typename LinearSolver<Matrix, Vector, 
           UmfpackRunner<Matrix, BaseVector_t<Vector>>>::Creator;
+#endif
           
     using Map = CreatorMap<SolverBase>;
     

dune/amdis/linear_algebra/mtl/ITL_Solver.hpp

@@ -406,9 +406,11 @@ namespace AMDiS
       = typename LinearSolver<Matrix, Vector, 
           KrylovRunner<ITLSolver, Matrix, BaseVector_t<Vector>>>::Creator;
     
+#ifdef HAVE_UMFPACK
     using UmfpackSolverCreator
       = typename LinearSolver<Matrix, Vector, 
           UmfpackRunner<Matrix, BaseVector_t<Vector>>>::Creator;
+#endif
           
     using Map = CreatorMap<SolverBase>;