no-mpi issues in PETSc backend

src/amdis/linearalgebra/DOFMapping.hpp

@@ -8,10 +8,10 @@
 
 #if HAVE_MPI
 #include <dune/common/parallel/remoteindices.hh>
+#include <amdis/common/parallel/Communicator.hpp>
 #endif
 
 #include <amdis/Environment.hpp>
-#include <amdis/common/parallel/Communicator.hpp>
 #include <amdis/linearalgebra/AttributeSet.hpp>
 
 namespace AMDiS

src/amdis/linearalgebra/DOFMapping.inc.hpp

@@ -4,8 +4,10 @@
 
 #include <dune/common/timer.hh>
 
+#if HAVE_MPI
 #include <amdis/common/parallel/Collective.hpp>
 #include <amdis/common/parallel/RequestOperations.hpp>
+#endif
 
 namespace AMDiS {
 

src/amdis/linearalgebra/petsc/Communication.hpp

@@ -8,6 +8,7 @@
 #include <dune/common/parallel/remoteindices.hh>
 #include <dune/common/std/optional.hh>
 
+#include <amdis/functions/GlobalIdSet.hpp>
 #include <amdis/linearalgebra/Communication.hpp>
 #include <amdis/linearalgebra/DOFMapping.hpp>
 #include <amdis/linearalgebra/ParallelIndexSet.hpp>

src/amdis/linearalgebra/petsc/MatrixNnzStructure.hpp

@@ -3,7 +3,9 @@
 #include <algorithm>
 #include <vector>
 
+#if HAVE_MPI
 #include <amdis/common/parallel/Communicator.hpp>
+#endif
 
 namespace AMDiS
 {

src/amdis/linearalgebra/petsc/MatrixNnzStructure.inc.hpp

@@ -8,8 +8,10 @@
 
 #include <amdis/AdaptiveGrid.hpp>
 #include <amdis/Output.hpp>
+#if HAVE_MPI
 #include <amdis/common/parallel/Communicator.hpp>
 #include <amdis/common/parallel/RequestOperations.hpp>
+#endif
 #include <amdis/linearalgebra/AttributeSet.hpp>
 
 namespace AMDiS {