Merge pull request #4829 from atgeirr/fix-serial-nldd-communicate

Fix serial compile

opm/simulators/flow/BlackoilModelEbosNldd.hpp

@@ -257,6 +257,7 @@ public:
             model_.ebosSimulator().model().invalidateAndUpdateIntensiveQuantities(/*timeIdx=*/0);
         }
 
+#if HAVE_MPI
         // Communicate solutions:
         // With multiple processes, this process' overlap (i.e. not
         // owned) cells' solution values have been modified by local
@@ -285,6 +286,7 @@ public:
             // Update intensive quantities for our overlap values.
             model_.ebosSimulator().model().invalidateAndUpdateIntensiveQuantitiesOverlap(/*timeIdx=*/0);
         }
+#endif // HAVE_MPI
 
         // Finish with a Newton step.
         // Note that the "iteration + 100" is a simple way to avoid entering

opm/simulators/linalg/ISTLSolverEbos.hpp

@@ -178,6 +178,9 @@ std::unique_ptr<Matrix> blockJacobiAdjacency(const Grid& grid,
         /// \param[in] simulator   The opm-models simulator object
         /// \param[in] parameters  Explicit parameters for solver setup, do not
         ///                        read them from command line parameters.
+        /// \param[in] forceSerial If true, will set up a serial linear solver only,
+        ///                        local to the current rank, instead of creating a
+        ///                        parallel (MPI distributed) linear solver.
         ISTLSolverEbos(const Simulator& simulator, const FlowLinearSolverParameters& parameters, bool forceSerial = false)
             : simulator_(simulator),
               iterations_( 0 ),