diff --git a/CMakeLists.txt b/CMakeLists.txt
index 1cef8aaf..f8889033 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -81,19 +81,7 @@ macro (sources_hook)
 			${PROJECT_SOURCE_DIR}/${opm-core_DIR}/core/linalg/LinearSolverIstl.cpp
 			)
 	endif (NOT dune-istl_FOUND)
-	if (NOT SuiteSparse_FOUND)
-		list (REMOVE_ITEM opm-core_SOURCES
-			${PROJECT_SOURCE_DIR}/${opm-core_DIR}/core/linalg/call_umfpack.c
-			${PROJECT_SOURCE_DIR}/${opm-core_DIR}/core/linalg/LinearSolverUmfpack.cpp
-			)
-	endif (NOT SuiteSparse_FOUND)
 
-	if (NOT PETSC_FOUND)
-		list (REMOVE_ITEM opm-core_SOURCES
-			${PROJECT_SOURCE_DIR}/${opm-core_DIR}/core/linalg/call_petsc.c
-			${PROJECT_SOURCE_DIR}/${opm-core_DIR}/core/linalg/LinearSolverPetsc.cpp
-			)
-	endif (NOT PETSC_FOUND)
 	if ((NOT MPI_FOUND) OR (NOT DUNE_ISTL_FOUND))
 		list (REMOVE_ITEM tests_SOURCES
 			${PROJECT_SOURCE_DIR}/tests/test_parallel_linearsolver.cpp
diff --git a/examples/compute_eikonal_from_files.cpp b/examples/compute_eikonal_from_files.cpp
index edecd251..8e054614 100644
--- a/examples/compute_eikonal_from_files.cpp
+++ b/examples/compute_eikonal_from_files.cpp
@@ -19,7 +19,7 @@
 
 
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif // HAVE_CONFIG_H
 
diff --git a/examples/compute_initial_state.cpp b/examples/compute_initial_state.cpp
index 33c6f4a4..a2bae934 100644
--- a/examples/compute_initial_state.cpp
+++ b/examples/compute_initial_state.cpp
@@ -19,7 +19,7 @@
 */
 
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif // HAVE_CONFIG_H
 
diff --git a/examples/compute_tof.cpp b/examples/compute_tof.cpp
index b43452cc..f27d4fdb 100644
--- a/examples/compute_tof.cpp
+++ b/examples/compute_tof.cpp
@@ -19,7 +19,7 @@
 
 
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif // HAVE_CONFIG_H
 
diff --git a/examples/compute_tof_from_files.cpp b/examples/compute_tof_from_files.cpp
index 2ca476e9..d35a50b8 100644
--- a/examples/compute_tof_from_files.cpp
+++ b/examples/compute_tof_from_files.cpp
@@ -18,7 +18,7 @@
 */
 
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif // HAVE_CONFIG_H
 
diff --git a/examples/diagnose_relperm.cpp b/examples/diagnose_relperm.cpp
index 07aec746..7e7118e1 100644
--- a/examples/diagnose_relperm.cpp
+++ b/examples/diagnose_relperm.cpp
@@ -19,7 +19,7 @@
 
 
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif // HAVE_CONFIG_H
 
diff --git a/opm/core/linalg/LinearSolverFactory.cpp b/opm/core/linalg/LinearSolverFactory.cpp
index 5d71d720..b0890e59 100644
--- a/opm/core/linalg/LinearSolverFactory.cpp
+++ b/opm/core/linalg/LinearSolverFactory.cpp
@@ -17,7 +17,7 @@
   along with OPM.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
diff --git a/opm/core/linalg/LinearSolverIstl.cpp b/opm/core/linalg/LinearSolverIstl.cpp
index 82ba1345..1ec4a161 100644
--- a/opm/core/linalg/LinearSolverIstl.cpp
+++ b/opm/core/linalg/LinearSolverIstl.cpp
@@ -18,7 +18,7 @@
 */
 
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif
 
diff --git a/opm/core/linalg/LinearSolverPetsc.cpp b/opm/core/linalg/LinearSolverPetsc.cpp
index 57823aad..89521aff 100644
--- a/opm/core/linalg/LinearSolverPetsc.cpp
+++ b/opm/core/linalg/LinearSolverPetsc.cpp
@@ -19,6 +19,9 @@
 */
 
 #include "config.h"
+
+#if HAVE_PETSC
+
 #include <cstring>
 #include <opm/core/linalg/LinearSolverPetsc.hpp>
 #include <unordered_map>
@@ -287,3 +290,4 @@ namespace{
 
 } // namespace Opm
 
+#endif // HAVE_PETSC
diff --git a/opm/core/linalg/LinearSolverPetsc.hpp b/opm/core/linalg/LinearSolverPetsc.hpp
index c5ba9a50..e8b9931c 100644
--- a/opm/core/linalg/LinearSolverPetsc.hpp
+++ b/opm/core/linalg/LinearSolverPetsc.hpp
@@ -20,6 +20,11 @@
 
 #ifndef OPM_LINEARSOLVERPETSC_HEADER_INCLUDED
 #define OPM_LINEARSOLVERPETSC_HEADER_INCLUDED
+
+#if !HAVE_PETSC
+#error "LinearSolverPetsc.hpp included, but the PETSc libraries are not available!"
+#endif
+
 #include <opm/core/linalg/LinearSolverInterface.hpp>
 #include <opm/core/utility/parameters/ParameterGroup.hpp>
 #include <string>
diff --git a/opm/core/linalg/call_umfpack.c b/opm/core/linalg/call_umfpack.c
index 9f721141..f8b926e6 100644
--- a/opm/core/linalg/call_umfpack.c
+++ b/opm/core/linalg/call_umfpack.c
@@ -34,6 +34,8 @@
 */
 
 #include "config.h"
+
+#if HAVE_UMFPACK
 #include <assert.h>
 #include <stdlib.h>
 
@@ -183,3 +185,15 @@ call_UMFPACK(struct CSRMatrix *A, const double *b, double *x)
     csc_deallocate(csc);
 }
 
+#else
+#include <stdlib.h>
+#include <opm/core/linalg/call_umfpack.h>
+
+void
+call_UMFPACK(struct CSRMatrix *A, const double *b, double *x)
+{
+    /* UMFPACK is not available */
+    abort();
+}
+
+#endif
diff --git a/opm/core/simulator/SimulatorState.cpp b/opm/core/simulator/SimulatorState.cpp
deleted file mode 100644
index 180dc141..00000000
--- a/opm/core/simulator/SimulatorState.cpp
+++ /dev/null
@@ -1,130 +0,0 @@
-#include <opm/common/ErrorMacros.hpp>
-#include <opm/common/util/numeric/cmp.hpp>
-#include <opm/core/simulator/SimulatorState.hpp>
-
-#include <algorithm>
-#include <cmath>
-#include <cassert>
-
-using namespace Opm;
-
-bool
-SimulatorState::equals (const SimulatorState& other,
-                        double epsilon) const {
-    bool equal = (num_phases_ == other.num_phases_);
-
-    // if we use &=, then all the tests will be run regardless
-    equal = equal && cmp::vector_equal( pressure() , other.pressure() , cmp::default_abs_epsilon , epsilon);
-    equal = equal && cmp::vector_equal( temperature() , other.temperature() , cmp::default_abs_epsilon , epsilon);
-    equal = equal && cmp::vector_equal( facepressure() , other.facepressure() , cmp::default_abs_epsilon , epsilon);
-    equal = equal && cmp::vector_equal( faceflux() , other.faceflux() , cmp::default_abs_epsilon , epsilon);
-    equal = equal && cmp::vector_equal( saturation() , other.saturation() , cmp::default_abs_epsilon , epsilon);
-
-    return equal;
-}
-
-
-
-void
-SimulatorState::init(int number_of_cells, int number_of_faces, int num_phases)
-{
-    num_cells_  = number_of_cells;
-    num_faces_  = number_of_faces;
-    num_phases_ = num_phases;
-
-    // clear memory
-    cellData_ = std::vector< std::vector<double> > ();
-    faceData_ = std::vector< std::vector<double> > ();
-
-    int id;
-    id = registerCellData("PRESSURE", 1, 0.0 );
-    if( id != pressureId_ )
-        OPM_THROW(std::logic_error,"ids in SimulatorState do not match");
-    assert( pressureId_ == id );
-    id = registerCellData("TEMPERATURE", 1, 273.15 + 20 );
-    assert( temperatureId_ == id );
-    id = registerCellData("SATURATION", num_phases_, 0.0 );
-    assert( saturationId_ == id );
-
-    for (int cell = 0; cell < number_of_cells; ++cell) {
-        // Defaulting the second saturation to 1.0.
-        // This will usually be oil in a water-oil case,
-        // gas in an oil-gas case.
-        // For proper initialization, one should not rely on this,
-        // but use available phase information instead.
-        saturation()[num_phases_*cell + 1] = 1.0;
-    }
-
-    id = registerFaceData("FACEPRESSURE", 1, 0.0 );
-    assert( facePressureId_ == id );
-    id = registerFaceData("FACEFLUX", 1, 0.0 );
-    assert( faceFluxId_ == id );
-}
-
-size_t
-SimulatorState::registerCellData( const std::string& name, const int components, const double initialValue )
-{
-    // check if init has been called
-    const size_t pos = cellData_.size();
-    cellDataNames_.emplace_back( name );
-    cellData_.emplace_back( num_cells_ * components, initialValue );
-    return pos;
-}
-
-size_t
-SimulatorState::registerFaceData( const std::string& name, const int components, const double initialValue )
-{
-    // check if init has been called
-    const size_t pos = faceData_.size();
-    faceDataNames_.emplace_back( name );
-    faceData_.emplace_back( num_faces_ * components, initialValue );
-    return pos ;
-}
-
-void SimulatorState::setCellDataComponent( const std::string& name , size_t component , const std::vector<int>& cells , const std::vector<double>& values) {
-  const auto iter = std::find( cellDataNames_.begin() , cellDataNames_.end() , name);
-  int id = iter - cellDataNames_.begin();
-  auto& data = cellData_[id];
-  if (component >= size_t(num_phases_))
-    throw std::invalid_argument("Invalid component");
-
-  if (cells.size() != values.size())
-    throw std::invalid_argument("size mismatch between cells and values");
-
-  /* This is currently quite broken; the setCellDataComponent
-     method assumes that the number of components in the field
-     we are currently focusing on has num_phases components in
-     total. This restriction should be lifted by allowing a per
-     field number of components.
-  */
-  if (data.size() != size_t(num_phases_ * num_cells_))
-    throw std::invalid_argument("Can currently only be used on fields with num_components == num_phases (i.e. saturation...) ");
-
-  for (size_t i = 0; i < cells.size(); i++) {
-    if (cells[i] < num_cells_) {
-      auto field_index = cells[i] * num_phases_ + component;
-      auto value = values[i];
-
-      data[field_index] = value;
-    } else {
-      throw std::invalid_argument("Invalid cell number");
-    }
-  }
-}
-
-
-std::vector<double>& SimulatorState::getCellData( const std::string& name )  {
-    const auto iter = std::find( cellDataNames_.begin() , cellDataNames_.end() , name);
-    int id = iter - cellDataNames_.begin();
-    auto& data = cellData_[id];
-    return data;
-}
-
-
-const std::vector<double>& SimulatorState::getCellData( const std::string& name )  const {
-    const auto iter = std::find( cellDataNames_.begin() , cellDataNames_.end() , name);
-    int id = iter - cellDataNames_.begin();
-    const auto& data = cellData_[id];
-    return data;
-}
-
diff --git a/opm/core/transport/implicit/TransportSolverTwophaseImplicit.cpp b/opm/core/transport/implicit/TransportSolverTwophaseImplicit.cpp
index e8c1af72..84cb6943 100644
--- a/opm/core/transport/implicit/TransportSolverTwophaseImplicit.cpp
+++ b/opm/core/transport/implicit/TransportSolverTwophaseImplicit.cpp
@@ -26,7 +26,7 @@
   along with OPM.  If not, see <http://www.gnu.org/licenses/>.
 */
 
-#if HAVE_CONFIG_H
+#ifdef HAVE_CONFIG_H
 #include "config.h"
 #endif // HAVE_CONFIG_H
 
diff --git a/travis/build-and-test-opm-core.sh b/travis/build-and-test-opm-core.sh
deleted file mode 100755
index 2810c7d4..00000000
--- a/travis/build-and-test-opm-core.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-pushd . > /dev/null
-opm-core/travis/build-opm-core.sh
-cd opm-core/build
-ctest --output-on-failure
-popd > /dev/null
diff --git a/travis/build-opm-core.sh b/travis/build-opm-core.sh
deleted file mode 100755
index fad3f8ed..00000000
--- a/travis/build-opm-core.sh
+++ /dev/null
@@ -1,10 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-pushd . > /dev/null
-cd opm-core
-mkdir build
-cd build
-cmake -D SUPERLU_ROOT=../../SuperLU ../
-make
-popd > /dev/null
diff --git a/travis/clone-and-build-dune-istl.sh b/travis/clone-and-build-dune-istl.sh
deleted file mode 100755
index 2ca08304..00000000
--- a/travis/clone-and-build-dune-istl.sh
+++ /dev/null
@@ -1,12 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-pushd . > /dev/null
-git clone https://github.com/dune-project/dune-istl.git
-cd dune-istl
-git checkout tags/v2.3.1
-mkdir build
-cd build
-cmake ../
-make
-popd > /dev/null
diff --git a/travis/clone-and-build-superlu.sh b/travis/clone-and-build-superlu.sh
deleted file mode 100755
index 77affea7..00000000
--- a/travis/clone-and-build-superlu.sh
+++ /dev/null
@@ -1,11 +0,0 @@
-#!/usr/bin/env bash
-set -e
-
-pushd . > /dev/null
-git clone https://github.com/starseeker/SuperLU.git
-cd SuperLU
-mkdir build
-cd build
-cmake -D CMAKE_INSTALL_PREFIX=.. -D SUPERLU_BUILD_EXAMPLES=OFF -D SUPERLU_ENABLE_TESTING=OFF ../
-make install
-popd > /dev/null