Enabled PETSc 3.5

CMakeLists.txt

@@ -117,7 +117,11 @@ IF(OGS_USE_LIS)
 ENDIF()
 
 IF(OGS_USE_PETSC)
+    MESSAGE(STATUS "PETSc version is ${PETSC_VERSION}")
     ADD_DEFINITIONS(-DUSE_PETSC)
+    IF(PETSC_VERSION VERSION_GREATER 3.4)
+      ADD_DEFINITIONS(-DPETSC_V35)
+    ENDIF(PETSC_VERSION VERSION_GREATER 3.4) 
 ENDIF()
 
 IF(OGS_USE_EIGEN)

MathLib/LinAlg/PETSc/PETScLinearSolver.cpp

@@ -41,7 +41,11 @@ bool PETScLinearSolver::solve(const PETScVector &b, PETScVector &x)
     PetscMemoryGetCurrentUsage(&mem1);
 #endif
 
+#ifdef PETSC_V35
+    KSPSetOperators(_solver, _A.getRawMatrix(), _A.getRawMatrix());
+#else 
     KSPSetOperators(_solver, _A.getRawMatrix(), _A.getRawMatrix(), DIFFERENT_NONZERO_PATTERN);
+#endif
 
     KSPSolve(_solver, b.getData(), x.getData());