Use *gmsg for messages

src/Solvers/AMR_MG/Amesos2BottomSolver.h

@@ -7,6 +7,8 @@
 
 #include <string>
 
+extern Inform* gmsg;
+
 /// Interface to Amesos2 solvers of the Trilinos package
 template <class Level>
 class Amesos2BottomSolver : public BottomSolver<Teuchos::RCP<amr::matrix_t>,

src/Solvers/AMR_MG/Amesos2BottomSolver.hpp

@@ -28,8 +28,7 @@ void Amesos2BottomSolver<Level>::setOperator(const Teuchos::RCP<matrix_t>& A,
     try {
         solver_mp = Amesos2::create<matrix_t, mv_t>(solvertype_m, A);
     } catch(const std::invalid_argument& ex) {
-        //TODO change to gmsg IPPL when built-in in OPAL
-        std::cerr << ex.what() << std::endl;
+        *gmsg << ex.what() << endl;
     }
     
     solver_mp->symbolicFactorization();

src/Solvers/AMR_MG/BelosBottomSolver.hpp

 #include "Ippl.h"
 #include "Utilities/OpalException.h"
 
+extern Inform* gmsg;
+
 template <class Level>
 BelosBottomSolver<Level>::BelosBottomSolver(std::string solvertype,
                                             const std::shared_ptr<prec_t>& prec_p)
@@ -39,10 +41,9 @@ void BelosBottomSolver<Level>::solve(const Teuchos::RCP<mv_t>& x,
     Belos::ReturnType ret = solver_mp->solve();
     
     if ( ret != Belos::Converged ) {
-        //TODO When put into OPAL: Replace with gmsg
-        std::cerr << "Warning: Bottom solver not converged. Achieved tolerance"
-                  << " after " << solver_mp->getNumIters() << " iterations is "
-                  << solver_mp->achievedTol() << "." << std::endl;
+        *gmsg << "Warning: Bottom solver not converged. Achieved tolerance"
+              << " after " << solver_mp->getNumIters() << " iterations is "
+              << solver_mp->achievedTol() << "." << endl;
     }
     
     // undo sign change