.gitignore

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 *~
 /build*/
+# ignore files generated during python setup.py sdist
+MANIFEST
+_skbuild/
+dist
+*.egg-info/
+# ignore macOS filesystem
+.DS_Store

.gitlab-ci.yml

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 ---
 include:
-  - "https://gitlab.dune-project.org/core/ci-config/raw/master/config/common/master.yml"
-  - "https://gitlab.dune-project.org/core/ci-config/raw/master/jobs/common/master.yml"
+  - project: 'core/ci-config'
+    ref: master
+    file: 'config/common/master.yml'
+  - project: 'core/ci-config'
+    ref: master
+    file: 'jobs/common/master.yml'
 
 before_script:
   - duneci-install-module https://gitlab.dune-project.org/core/dune-common.git
@@ -14,3 +21,24 @@ variables:
 # number of cores. We solve the issue by disallowing OpenMP to allocate more
 # than one thread.
   OMP_NUM_THREADS: 1
+
+# Check for spelling mistakes in text
+code-spelling-check:
+  stage: .pre
+  # Avoid the global 'before_script'
+  before_script: ""
+  image: registry.dune-project.org/docker/ci/debian:11
+  tags: [duneci]
+  script:
+  - codespell
+    --ignore-words-list ba,eiter,equil,fo,parms
+
+reuse:
+  stage: .pre
+  image:
+    name: docker.io/fsfe/reuse:latest
+    entrypoint: [""]
+  tags: [duneci]
+  before_script: ""
+  script:
+    - reuse lint

CHANGELOG.md

-# Master (will become release 2.7)
+<!--
+SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+-->
 
-- Deprecated the preconditioner implementations `SeqILU0` and `SeqILUn`.
-  Use `SeqILU` instead, which implements incomplete LU decomposition
-  of any order.
+# Master (will become release 2.11)
+
+- `FastAMG` can now be used with non-nested matrices of type `BCRSMatrix<T>`
+  where `T` is a plain number type instead of `FieldMatrix<T,m,n>`.
+
+# Release 2.10
+
+- Improve testing support on Laplacian matrices with an optional diagonal regularization parameter.
+
+- Base the implementation of `VariableBlockVector` on `std::vector` as the storage type. Note that
+  this prevents from using `bool` as block type that was possible before.
+
+- A method `BCRSMatrix::setIndicesNoSort()` was added. Similar
+  to `BCRSMatrix::setIndices()` this allows to insert all indices
+  of a row at once, but - incontrast to the latter - does not sort them.
+  This allows to speed up insertion if indices are already sorted.
+
+- `UMFPACK` is extended to arbitrary blocked matrix structures. This includes `MultiTypeBlockMatrix`. The external interface is unchanged.
+  However, internally the `BCCSMatrixInitializer` is replaced by direct calls of `flatMatrixForEach` similar to `Cholmod`. This requires a
+  compatible vector field of "ignored" degrees of freedom. The method `setSubMatrix` with a top-level index set is preserved for compatibility.
+
+- The internal storage in `MatrixIndexSet` was changed from `std::set` to a sorted `std::vector`
+  (with a `std::set` fallback for very dense rows) to improve performance. The stored index
+  type was changed from `std::size_t` to `uint32_t` to reduce memory consumption and improve
+  performance. Hence, `MatrixIndexSet` can no longer be used for very large matrices with more
+  than 2^32 columns.
+
+- Added flag 'useFixedOrder' to the coarsen method of AMGs ParallelIndicesCoarsener.
+  If set to true, during the creation of the coarser matrix (by accumulation and restriction
+  to fewer processes) the coarse matrix rows are ordered in a fixed manner, making parallel runs
+  reproducible; the runtime is possibly not ideal though.
+  If set to false (which is the default), the row order depends on the order of messages received from the
+  processes responsible for the respective parts of the finer grid. Then the indices on the coarser grid
+  may differ from run to run.
+
+- Define `field_type` and `real_type` in `MultiTypeBlock[Matrix|Vector]` only if a common type of these
+  types exist over all blocks in the container. Otherwise it is defined as `Std::nonesuch`.
+
+## Deprecations and removals
+
+- The deprecated CMake variables `SUPERLU_INCLUDE_DIRS`, `SUPERLU_LIBRARIES`,
+  `SUPERLU_DUNE_COMPILE_FLAGS`, and `SUPERLU_DUNE_LIBRARIES` are removed, they are
+  replaced by the target `SuperLU::SuperLU`.
+
+- Multiple containers no longer provide the deprecated member function `blocklevel`. Use the free function
+  `blockLevel()`.
+
+- Removed deprecated function `initSolverFactories()`, use `initSolverFactories<O>` instead.
+
+- Removed deprecated `MultyTypeBlockMatrix::size()`, use `N()` instead.
+
+- Removed deprecated `MultyTypeBlockVector::count()`, use `N()` instead.
+
+- Deprecated `writeSVGMatrix` with `std::stream` as the second argument. Use the method
+  with `std::stream` as the first argument.
+
+
+# Release 2.9
+
+- Add `const` qualifier to `LinearOperator` and `ScalarProduct` in
+  `IterativeSolver`. In particular, the constructors of iterative solvers have
+  changed.
+
+- Solvers are more robust if used with multiple right-hand sides and one lane starts with the exact solution.
+
+- Added a function to write nested matrices as SVG objects: `writeSVGMatrix(...)`
+
+- `MultiTypeBlockVector` uses now `std::common_type` of the entries for the `field_type`. The old `double`
+  default is replaced by `Std::nonesuch` of an empty `MultiTypeBlockVector`.
+
+- All vector implementations require a `FieldTraits` class specialization to export `field_type` and `real_type`
+  in order to work with blocked ISTL vector types.
+
+- MINRES: The algorithm computes the preconditioned defect during the iterations. However, the initial
+  defect was computed as the defect of the original/non-preconditioned system. This is now changed so
+  that the initial defect is also computed as the preconditioned defect (this is also in line with GMRes).
+  In some numerical tests with a Stokes system this lead to earlier termination when using the same
+  termination criterion.
+
+- The `Cholmod` class now provides access to the `cholmod_factor` class that is
+  used by `CHOLMOD` itself to store the Cholesky factor.  This can be used to
+  use the more advanced features of `CHOLMOD`.
+
+- The `Cholmod` class now has an additional template parameter `Index`, which specifies the
+  type used by `CHOLMOD` for integers.  The types `int` (the default) and `SuiteSparse_long`
+  (which is usually `long int`) are supported.  Use `SuiteSparse_long` if your problems
+  are too big for `int`.
+
+- You can now multiply objects of type `ScaledIdentityMatrix` by scalars
+  using `operator*`.
+
+- You can now use `std::tuple_element` to get the types of `MultiTypeBlockVector` entries
+  and `MultiTypeBlockMatrix` rows.
+
+- The SPQR solver can now work with non-square matrices (a bug which caused a segfault when previously
+  attempting to do it was found and resolved).
+
+## Deprecations and removals
+
+- The deprecated ILU functions `bilu_backsolve`, `bilu0_decomposition`, `bilu_backsolve`,
+  `firstmatrixelement`, and `bilu_decomposition` are removed. Use their camel case
+  replacements.
+
+- Remove deprecated `ImplicitModeOverflowExhausted`, use
+  `ImplicitModeCompressionBufferExhausted` instead.
+
+
+# Release 2.8
+
+- Extended the MatrixMarket IO functions for reading and writing vectors with
+  SIMD field_type as tall-skinny matrices.
+
+- Added public access of the `cholmod_common` object in class `Cholmod`.
+
+- Python bindings have been moved from the `dune-python` module which is now
+  obsolete.
+  Note that for `dune-istl` bindings are still very much work in progress.
+  To activate Python bindings the CMake flag
+  `DUNE_ENABLE_PYTHONBINDINGS` needs to be turned on (default is off).
+  Furthermore, flags for either shared library or position independent code
+  needs to be used.
+
+- Added new utility functions templates `maxBlockLevel`, `minBlockLevel`, `blockLevel` in `dnue/istl/blocklevel.hh` to
+  automatically determine the block level of possibly nested ISTL vectors & matrices at compile time.
+  The block level cannot be always uniquely determined for `MultiTypeBlockMatrix`/`MultiTypeBlockVector` since the nesting level
+  of different block types might differ. Hence, `maxBlockLevel`, `minBlockLevel` always works
+  but if they yield different results `blockLevel` will not compile.
+  This condition can be checked with the function template `hasUniqueBlockLevel`.
+
+- The internal setup code of the various SuiteSparse solvers (like `UMFPack`)
+  has been cleaned up.  The effects should be invisible to all regular users.
+  However, if you have happened to use the `ColCompMatrix` and `ColCompMatrixInitializer`
+  classes in the past you need to port your code to use `Impl::BCCSMatrix` and
+  `Impl::BCCSMatrixInitializer` instead.  Their interfaces have changed a little bit;
+  please look at the class documentation for details.  The old header `colcompmatrix.hh`
+  is still there, but backward compatibility is only partial.
+
+- More implementation code of the ILU preconditioners (in `ilu.hh`) has moved
+  into the `ILU` namespace.  With the move, some methods have changed their names
+  from std-style to CamelCase.  The old methods are still there, but they are
+  deprecated now. The class `MatrixBlockError` has moved from the file `ilu.hh`
+  to the file `istlexception.hh`, because it is of wider interest.
+
+- Added the routines `flatVectorForEach` and `flatMatrixForEach` that traverse a (blocked) vector or matrix container.
+  At each entry a functor is called taking the entry and the (flat) index offset.
+
+- `Cholmod` solver can now be used with each blocked matrix/vector type compatible with `flatVectorForEach` and `flatMatrixForEach`.
+
+## Deprecations and removals
+- Drop deprecated bindings of direct solver Pardiso.
+
+- Remove deprecated preconditioner implementations `SeqILU0` and `SeqILUn`. Use
+  `SeqILU` instead, which implements incomplete LU decomposition of any order.
+
+- Remove deprecated methods 'BlockVector::resize' and 'BlockVector::reserve'
+  with two arguments.
+
+- Drop support SuperLU 4.
+
+- Rename the exception `ImplicitModeOverflowExhausted` to `ImplicitModeCompressionBufferExhausted`,
+  to better reflect its meaning.  The old exception is still there, but it triggers
+  a deprecation warning.
+
+- Remove deprecated `SequentialInformation::getSolverCategory()`, use
+  `category()` instead.
+
+## Known issues
+
+- SuiteSparse's threading tends to conflict with the threading from OpenBLAS. The
+  author of SuiteSparse reports cases of an
+  [100 fold slowdown](https://github.com/DrTimothyAldenDavis/SuiteSparse/issues/1)
+  for cholmod. See also
+  [dune-istl #91](https://gitlab.dune-project.org/core/dune-istl/-/issues/91).
+
+# Release 2.7
+
+- New `SolverFactory` for generating sequential direct or iterative solvers and
+  preconditioners from a `ParameterTree` configuration.
+
+- `BDMatrix` objects now have the method `solve`, which implements that
+  canonical way to solve block-diagonal linear systems.
 
 - The class `VariableBlockVector::CreateIterator` is a true STL output iterator now.
   This means that you can use STL algorithms like `std::fill` or `std::copy`
   to set the block sizes.
 
-- Support for SuiteSparse's CHOLMOD providing a sparse Cholesky
-  factorization.
-
 - `MultiTypeBlockVector<Args...>` now inherits the constructors from its
   parent type (`std::tuple<Args...>`). This means you can now also construct
   `MultiTypeBlockVector`s from values or references of BlockVectors.
 
-- `MultiTypeBlockVector::count()` is now `const`
-
 - All matrix and vector classes can now be instantiated with number types
   directly (A number type is any type for which `Dune::IsNumber<T>::value`
   is true).  For example, you can now use `BlockVector<double>` instead of
@@ -26,6 +202,48 @@
   a single entry can still be cast to their `field_type`.  Therefore, the
   change is completely backward-compatible.
 
+- Added a right-preconditioned flexible restarted GMRes solver
+
+- The UMFPack binding use the long int functions to compute larger systems.
+  With the \*_dl_\* versions instead of the \*_di_\* versions UMFPACK will not
+  have a memory limit of just 2 GiB.
+
+- Support for SuiteSparse's CHOLMOD providing a sparse Cholesky
+  factorization.
+
+- The interface methods `dot()` and `norm()` of ScalarProduct are now `const`. You will
+  have to adjust the method signatures in your own scalar product implementations.
+
+- `MultiTypeBlockVector` now implements the interface method `N()`, which
+  returns the number of vector entries.
+
+- `MultiTypeBlockVector` now implements the interface method `dim()`, which
+  returns the number of scalar vector entries.
+
+- `MultiTypeBlockVector::count()` is now `const`
+
+- `SeqILU` can now be used with SIMD data types.
+
+## Deprecations and removals
+
+- Deprecated support for SuperLU 4.x. It will be removed after Dune 2.7.
+
+- Deprecated the preconditioner implementations `SeqILU0` and `SeqILUn`.
+  Use `SeqILU` instead, which implements incomplete LU decomposition
+  of any order.
+
+- The method `setSolverCategory` of `OwnerOverlapCopyCommunication` is deprecated and
+  will be removed after Dune 2.7. The solver category can only be set in the constructor.
+
+- The method `getSolverCategory` of `OwnerOverlapCopyCommunication` is deprecated and
+  will be removed after Dune 2.7. Use `category()` instead.
+
+- The method `MultiTypeBlockVector::count()` has been deprecated, because its name
+  is inconsistent with the name mandated by the `dune-istl` vector interface.
+
+- The method `MultiTypeBlockMatrix::size()` has been deprecated, because its name
+  is inconsistent with the name mandated by the `dune-istl` vector interface.
+
 # Release 2.6
 
 - `BDMatrix` objects can now be constructed and assigned from `std::initializer_list`.
@@ -35,4 +253,4 @@
 
 - The solver infrastructure was updated to support SIMD data types (see
   current changes in `dune-common`). This allows to solve multiple systems
-  simultaniously using vectorization.
+  simultaneously using vectorization.

CMakeLists.txt

-# set up project
-project(dune-istl C CXX)
+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
 
-# general stuff
-cmake_minimum_required(VERSION 3.1)
+cmake_minimum_required(VERSION 3.16)
+project(dune-istl C CXX)
 
 # guess build tree of dune-common
 if(NOT (dune-common_DIR OR dune-common_ROOT OR
@@ -20,13 +20,32 @@ list(APPEND CMAKE_MODULE_PATH ${dune-common_MODULE_PATH}
 #include the dune macros
 include(DuneMacros)
 
+# deactivate global include-directories
+dune_policy(SET DP_DEFAULT_INCLUDE_DIRS NEW)
+
+# deactivate global calls to add_dune_all_flags in tests
+dune_policy(SET DP_TEST_ADD_ALL_FLAGS NEW)
+
 # start a dune project with information from dune.module
 dune_project()
 
+# create library target and export it as Dune::ISTL
+dune_add_library(duneistl INTERFACE
+  EXPORT_NAME ISTL
+  LINK_LIBRARIES Dune::Common)
+
+# set include directories to target
+dune_default_include_directories(duneistl INTERFACE)
+
 add_subdirectory(cmake/modules)
 add_subdirectory(dune)
 add_subdirectory(doc)
-add_subdirectory(lib)
+add_subdirectory(src)
+
+# if Python bindings are enabled, include necessary sub directories.
+if( DUNE_ENABLE_PYTHONBINDINGS )
+  add_subdirectory(python)
+endif()
 
 # finalize the dune project, e.g. generating config.h etc.
-finalize_dune_project(GENERATE_CONFIG_H_CMAKE)
+finalize_dune_project()

INSTALL

+<!--
+SPDX-FileCopyrightInfo: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+-->
+
 Installation Instructions
 =========================
 

LICENSE.md

@@ -2,43 +2,62 @@ Copyright holders:
 
 2014--2016    Marco Agnese
 2003--2013    Peter Bastian
-2004--2016    Markus Blatt
-2014--2016    Ansgar Burchardt
+2020          Jean Benezech
+2004--2024    Markus Blatt
+2022          Eduardo Bueno
+2022          Samuel Burbulla
+2014--2023    Ansgar Burchardt
 2004--2005    Adrian Burri
-2008--2015    Andreas Dedner
-2003--2016    Christian Engwer
-2005--2016    Jorrit Fahlke
-2008--2015    Bernd Flemisch
-2005--2016    Carsten Gräser
-2015--2016    Felix Gruber
-2012--2016    Christoph Grüninger
-2016          René Heß
-2016          Stephan Hilb
+2017--2018    Matthew Collins
+2008--2024    Andreas Dedner
+2018--2022    Nils-Arne Dreier
+2003--2023    Christian Engwer
+2005--2019    Jorrit Fahlke
+2008--2017    Bernd Flemisch
+2017--2020    Janick Gerstenberger
+2015--2020    Felix Gruber
+2005--2024    Carsten Gräser
+2012--2024    Christoph Grüninger
+2016--2020    René Heß
+2018          Claus-Justus Heine
+2016--2019    Stephan Hilb
+2018--2024    Lasse Hinrichsen
 2012--2013    Olaf Ippisch
-2013--2016    Dominic Kempf
+2018--2024    Patrick Jaap
+2013--2019    Dominic Kempf
 2015          Emmanouil Kiagias
-2004--2016    Robert Klöfkorn
-2016          Timo Koch
+2004--2023    Robert Klöfkorn
+2016--2023    Timo Koch
 2007          Sreejith Pulloor Kuttanikkad
-2013--2016    Arne Morten Kvarving (SINTEF)
+2013--2016    Arne Morten Kvarving
 2009--2013    Andreas Lauser
-2012--2016    Tobias Malkmus
+2012--2017    Tobias Malkmus
 2007--2009    Sven Marnach
 2013          René Milk
-2013--2016    Steffen Müthing
+2024          Alex Müller
+2013--2019    Steffen Müthing
 2016          Maikel Nadolski
+2023--2024    Lisa Julia Nebel
 2003--2005    Thimo Neubauer
 2010--2012    Rebecca Neumann
-2008--2014    Martin Nolte
+2008--2018    Martin Nolte
 2012--2015    Andreas Nüßing
 2013--2014    Marian Piatkowski
 2011--2016    Elias Pipping
 2013          Jurgis Pods
+2018--2024    Simon Praetorius
 2009          Atgeirr Rasmussen
+2018--2022    Lukas Renelt
+2021--2024    Santiago Ospina De Los Ríos
 2008--2013    Uli Sack
-2004--2016    Oliver Sander
+2023          Vaishnavi Sanchi
+2004--2024    Oliver Sander
+2015--2019    Linus Seelinger
 2013          Bård Skaflestad
+2018          Mathis Springwald
+2023          Jakob Torben
 2006--2010    Martin Weiser
+2019--2020    Kilian Weishaupt
 2015          Sebastian Westerheide
 2011--2012    Matthias Wohlmuth
 2014--2016    Jonathan Youett

LICENSES/LicenseRef-GPL-2.0-only-with-DUNE-exception.txt

+The DUNE library and headers are licensed under version 2 of the GNU
+General Public License (see below), with a special exception for
+linking and compiling against DUNE, the so-called "runtime exception."
+The license is intended to be similar to the GNU Lesser General
+Public License, which by itself isn't suitable for a template library.
+
+The exact wording of the exception reads as follows:
+
+   As a special exception, you may use the DUNE source files as part
+   of a software library or application without restriction.
+   Specifically, if other files instantiate templates or use macros or
+   inline functions from one or more of the DUNE source files, or you
+   compile one or more of the DUNE source files and link them with
+   other files to produce an executable, this does not by itself cause
+   the resulting executable to be covered by the GNU General Public
+   License.  This exception does not however invalidate any other
+   reasons why the executable file might be covered by the GNU General
+   Public License.
+
+
+        GNU GENERAL PUBLIC LICENSE
+           Version 2, June 1991
+
+ Copyright (C) 1989, 1991 Free Software Foundation, Inc.
+ 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+          Preamble
+
+  The licenses for most software are designed to take away your
+freedom to share and change it.  By contrast, the GNU General Public
+License is intended to guarantee your freedom to share and change free
+software--to make sure the software is free for all its users.  This
+General Public License applies to most of the Free Software
+Foundation's software and to any other program whose authors commit to
+using it.  (Some other Free Software Foundation software is covered by
+the GNU Library General Public License instead.)  You can apply it to
+your programs, too.
+
+  When we speak of free software, we are referring to freedom, not
+price.  Our General Public Licenses are designed to make sure that you
+have the freedom to distribute copies of free software (and charge for
+this service if you wish), that you receive source code or can get it
+if you want it, that you can change the software or use pieces of it
+in new free programs; and that you know you can do these things.
+
+  To protect your rights, we need to make restrictions that forbid
+anyone to deny you these rights or to ask you to surrender the rights.
+These restrictions translate to certain responsibilities for you if you
+distribute copies of the software, or if you modify it.
+
+  For example, if you distribute copies of such a program, whether
+gratis or for a fee, you must give the recipients all the rights that
+you have.  You must make sure that they, too, receive or can get the
+source code.  And you must show them these terms so they know their
+rights.
+
+  We protect your rights with two steps: (1) copyright the software, and
+(2) offer you this license which gives you legal permission to copy,
+distribute and/or modify the software.
+
+  Also, for each author's protection and ours, we want to make certain
+that everyone understands that there is no warranty for this free
+software.  If the software is modified by someone else and passed on, we
+want its recipients to know that what they have is not the original, so
+that any problems introduced by others will not reflect on the original
+authors' reputations.
+
+  Finally, any free program is threatened constantly by software
+patents.  We wish to avoid the danger that redistributors of a free
+program will individually obtain patent licenses, in effect making the
+program proprietary.  To prevent this, we have made it clear that any
+patent must be licensed for everyone's free use or not licensed at all.
+
+  The precise terms and conditions for copying, distribution and
+modification follow.
+
+        GNU GENERAL PUBLIC LICENSE
+   TERMS AND CONDITIONS FOR COPYING, DISTRIBUTION AND MODIFICATION
+
+  0. This License applies to any program or other work which contains
+a notice placed by the copyright holder saying it may be distributed
+under the terms of this General Public License.  The "Program", below,
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+language.  (Hereinafter, translation is included without limitation in
+the term "modification".)  Each licensee is addressed as "you".
+
+Activities other than copying, distribution and modification are not
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+Whether that is true depends on what the Program does.
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+  1. You may copy and distribute verbatim copies of the Program's
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+You may charge a fee for the physical act of transferring a copy, and
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+These requirements apply to the modified work as a whole.  If
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+  3. You may copy and distribute the Program (or a work based on it,
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+Sections 1 and 2 above provided that you also do one of the following:
+
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+
+  4. You may not copy, modify, sublicense, or distribute the Program
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+otherwise to copy, modify, sublicense or distribute the Program is
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+
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+prohibited by law if you do not accept this License.  Therefore, by
+modifying or distributing the Program (or any work based on the
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+the Program or works based on it.
+
+  6. Each time you redistribute the Program (or any work based on the
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+infringement or for any other reason (not limited to patent issues),
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+
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+
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+
+This section is intended to make thoroughly clear what is believed to
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+
+  8. If the distribution and/or use of the Program is restricted in
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+
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+
+Each version is given a distinguishing version number.  If the Program
+specifies a version number of this License which applies to it and "any
+later version", you have the option of following the terms and conditions
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+Software Foundation.  If the Program does not specify a version number of
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+Foundation.
+
+  10. If you wish to incorporate parts of the Program into other free
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+
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+  12. IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
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+POSSIBILITY OF SUCH DAMAGES.
+
+         END OF TERMS AND CONDITIONS
+
+      How to Apply These Terms to Your New Programs
+
+  If you develop a new program, and you want it to be of the greatest
+possible use to the public, the best way to achieve this is to make it
+free software which everyone can redistribute and change under these terms.
+
+  To do so, attach the following notices to the program.  It is safest
+to attach them to the start of each source file to most effectively
+convey the exclusion of warranty; and each file should have at least
+the "copyright" line and a pointer to where the full notice is found.
+
+    <one line to give the program's name and a brief idea of what it does.>
+    Copyright (C) <year>  <name of author>
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
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+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+
+
+Also add information on how to contact you by electronic and paper mail.
+
+If the program is interactive, make it output a short notice like this
+when it starts in an interactive mode:
+
+    Gnomovision version 69, Copyright (C) year name of author
+    Gnomovision comes with ABSOLUTELY NO WARRANTY; for details type `show w'.
+    This is free software, and you are welcome to redistribute it
+    under certain conditions; type `show c' for details.
+
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+be called something other than `show w' and `show c'; they could even be
+mouse-clicks or menu items--whatever suits your program.
+
+You should also get your employer (if you work as a programmer) or your
+school, if any, to sign a "copyright disclaimer" for the program, if
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+
+  Yoyodyne, Inc., hereby disclaims all copyright interest in the program
+  `Gnomovision' (which makes passes at compilers) written by James Hacker.
+
+  <signature of Ty Coon>, 1 April 1989
+  Ty Coon, President of Vice
+
+This General Public License does not permit incorporating your program into
+proprietary programs.  If your program is a subroutine library, you may
+consider it more useful to permit linking proprietary applications with the
+library.  If this is what you want to do, use the GNU Lesser General
+Public License instead of this License.

README.md

+<!--
+SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+-->
+
 DUNE-library
 ============
 

cmake/modules/AddARPACKPPFlags.cmake

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 # Defines the functions to use ARPACKPP
 #
 # .. cmake_function:: add_dune_arpackpp_flags
@@ -9,12 +12,19 @@
 #
 #       A list of targets to use ARPACKPP with.
 #
+include_guard(GLOBAL)
+
+set_package_properties("ARPACK" PROPERTIES
+  PURPOSE "Solve large scale eigenvalue problems")
+
+set_package_properties("ARPACKPP" PROPERTIES
+  PURPOSE "C++ interface for ARPACK")
 
 function(add_dune_arpackpp_flags _targets)
   if(ARPACKPP_FOUND)
     foreach(_target ${_targets})
-      target_link_libraries(${_target} ${ARPACKPP_DUNE_LIBRARIES})
-      target_compile_definitions(${_target} PUBLIC ENABLE_ARPACKPP=1)
+      target_link_libraries(${_target} PUBLIC ${ARPACKPP_DUNE_LIBRARIES})
+      target_compile_definitions(${_target} PUBLIC HAVE_ARPACKPP=1)
       target_compile_options(${_target} PUBLIC ${ARPACKPP_DUNE_COMPILE_FLAGS})
     endforeach()
   endif()

cmake/modules/AddSuperLUFlags.cmake

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 # Defines the functions to use SuperLU
 #
 # .. cmake_function:: add_dune_superlu_flags
@@ -9,19 +12,28 @@
 #
 #       A list of targets to use SuperLU with.
 #
+include_guard(GLOBAL)
+
+set_package_properties("SuperLU" PROPERTIES
+  PURPOSE "Direct solver for linear system, based on LU decomposition")
+
+# set HAVE_SUPERLU for config.h
+set(HAVE_SUPERLU ${SuperLU_FOUND})
+
+# register all SuperLU related flags
+if(SuperLU_FOUND)
+  dune_register_package_flags(
+    COMPILE_DEFINITIONS "HAVE_SUPERLU=1"
+    LIBRARIES SuperLU::SuperLU)
+endif()
 
-function(add_dune_superlu_flags)
-  if(SUPERLU_FOUND)
-    cmake_parse_arguments(_add_superlu "OBJECT" "" "" ${ARGN})
-    foreach(_target ${_add_superlu_UNPARSED_ARGUMENTS})
-      if(NOT _add_superlu_OBJECT)
-        target_link_libraries(${_target} ${SUPERLU_DUNE_LIBRARIES})
-      endif()
-      get_target_property(_props ${_target} COMPILE_FLAGS)
-      string(REPLACE "_props-NOTFOUND" "" _props "${_props}")
-      set_target_properties(${_target} PROPERTIES COMPILE_FLAGS
-        "${_props} ${SUPERLU_DUNE_COMPILE_FLAGS} -DENABLE_SUPERLU=1")
+# Provide function to set target properties for linking to SuperLU
+function(add_dune_superlu_flags _targets)
+  if(SuperLU_FOUND)
+    foreach(_target ${_targets})
+      target_link_libraries(${_target} PUBLIC SuperLU::SuperLU)
+      target_compile_definitions(${_target} PUBLIC HAVE_SUPERLU=1)
     endforeach()
-  endif(SUPERLU_FOUND)
+  endif()
 endfunction(add_dune_superlu_flags)
 

cmake/modules/CMakeLists.txt

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 set(modules
   AddARPACKPPFlags.cmake
   AddSuperLUFlags.cmake

cmake/modules/DuneIstlMacros.cmake

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 # .. cmake_module::
 #
 #    This modules content is executed whenever a module required or suggests dune-istl!
@@ -6,12 +9,10 @@
 find_package(METIS)
 find_package(ParMETIS)
 include(AddParMETISFlags)
-find_package(SuperLU)
+find_package(SuperLU 5.0)
 include(AddSuperLUFlags)
 find_package(ARPACKPP)
 include(AddARPACKPPFlags)
-find_package(SuiteSparse OPTIONAL_COMPONENTS CHOLMOD LDL SPQR UMFPACK)
-include(AddSuiteSparseFlags)
 
 # enable / disable backwards compatibility w.r.t. category
 set(DUNE_ISTL_SUPPORT_OLD_CATEGORY_INTERFACE 1

cmake/modules/FindARPACK.cmake

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 # .. cmake_module::
 #
 #    Module that checks whether ARPACK is available and usable.
@@ -22,15 +25,10 @@
 #    system paths.
 #
 
-# check for Fortran support which is required by ARPACK
-if(NOT(Fortran_Works))
-  message(WARNING "Fortran doesn't seem to be supported, skipping search for ARPACK.")
-  # log errornous result
-  file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-    "Determing location of ARPACK failed:\n"
-    "Fortran support is required but could not be detected\n\n")
-  return()
-endif()
+# text for feature summary
+set_package_properties("ARPACK" PROPERTIES
+  URL "https://www.arpack.org"
+  DESCRIPTION "ARnoldi PACKage")
 
 # look for library, only at positions given by the user
 find_library(ARPACK_LIBRARY
@@ -78,18 +76,13 @@ if(ARPACK_FOUND)
   set(ARPACK_LIBRARIES ${ARPACK_LIBRARY})
   # log result
   file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-    "Determing location of ARPACK succeeded:\n"
+    "Determining location of ARPACK succeeded:\n"
     "Libraries to link against: ${ARPACK_LIBRARIES}\n\n")
   set(ARPACK_DUNE_LIBRARIES ${ARPACK_LIBRARIES}
     CACHE STRING "Libraries used by DUNE when linking ARPACK programs")
 else()
-  # log errornous result
+  # log erroneous result
   file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-    "Determing location of ARPACK failed:\n"
+    "Determining location of ARPACK failed:\n"
     "Libraries to link against: ${ARPACK_LIBRARIES}\n\n")
 endif()
-
-# text for feature summary
-set_package_properties("ARPACK" PROPERTIES
-  DESCRIPTION "ARnoldi PACKage"
-  PURPOSE "Solve large scale eigenvalue problems")

cmake/modules/FindARPACKPP.cmake

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 # .. cmake_module::
 #
 #    Module that checks whether ARPACK++ is available and usable.
@@ -25,6 +28,11 @@
 #    system paths.
 #
 
+# text for feature summary
+set_package_properties("ARPACKPP" PROPERTIES
+  URL "https://github.com/m-reuter/arpackpp"
+  DESCRIPTION "ARPACK++")
+
 # find ARPACK which is required by ARPACK++
 find_package(ARPACK)
 
@@ -97,7 +105,7 @@ if(ARPACKPP_FOUND)
   endif(ARPACKPP_LIBRARY)
   # log result
   file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-    "Determing location of ARPACK++ succeeded:\n"
+    "Determining location of ARPACK++ succeeded:\n"
     "Include directory: ${ARPACKPP_INCLUDE_DIRS}\n"
     "Libraries to link against: ${ARPACKPP_LIBRARIES}\n\n")
 
@@ -113,24 +121,19 @@ if(ARPACKPP_FOUND)
   set(ARPACKPP_DUNE_LIBRARIES ${ARPACKPP_LIBRARIES}
     CACHE STRING "Libraries used by DUNE when linking ARPACK++ programs")
 else()
-  # log errornous result
+  # log erroneous result
   file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
-    "Determing location of ARPACK++ failed:\n"
+    "Determining location of ARPACK++ failed:\n"
     "Include directory: ${ARPACKPP_INCLUDE_DIRS}\n"
     "Libraries to link against: ${ARPACKPP_LIBRARIES}\n\n")
 endif()
 
-# set HAVE_ARPACKPP for config.h
+# set HAVE_ARPACKPP for conditional tests
 set(HAVE_ARPACKPP ${ARPACKPP_FOUND})
 
 # register all ARPACK++ related flags
 if(ARPACKPP_FOUND)
-  dune_register_package_flags(COMPILE_DEFINITIONS "ENABLE_ARPACKPP=1"
+  dune_register_package_flags(COMPILE_DEFINITIONS "HAVE_ARPACKPP=1"
                               LIBRARIES "${ARPACKPP_LIBRARIES}"
                               COMPILE_OPTIONS "${ARPACKPP_DUNE_COMPILE_FLAGS}")
 endif()
-
-# text for feature summary
-set_package_properties("ARPACKPP" PROPERTIES
-  DESCRIPTION "ARPACK++"
-  PURPOSE "C++ interface for ARPACK")

cmake/modules/FindSuperLU.cmake

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 # .. cmake_module::
 #
 #    Module that checks whether SuperLU is available and usable.
-#    SuperLU must be 4.0 or newer.
-#
-#    Variables used by this module which you may want to set:
-#
-#    :ref:`SUPERLU_ROOT`
-#       Path list to search for SuperLU
 #
-#    Sets the follwing variables:
+#    Sets the following variables:
 #
-#    :code:`SUPERLU_FOUND`
+#    :code:`SuperLU_FOUND`
 #       True if SuperLU available and usable.
 #
-#    :code:`SUPERLU_MIN_VERSION_4`
-#       True if SuperLU version >= 4.0.
-#
-#    :code:`SUPERLU_MIN_VERSION_4_3`
-#       True if SuperLU version >= 4.3.
-#
-#    :code:`SUPERLU_MIN_VERSION_5`
-#       True if SuperLU version >= 5.0.
-#
-#    :code:`SUPERLU_WITH_VERSION`
-#       Human readable string containing version information.
+#    This module provides the following imported targets, if found:
 #
-#    :code:`SUPERLU_INCLUDE_DIRS`
-#       Path to the SuperLU include dirs.
+#    :code:`SuperLU:SuperLU`
+#      Library and include directories for the found SuperLU.
 #
-#    :code:`SUPERLU_LIBRARIES`
-#       Name to the SuperLU library.
 #
-# .. cmake_variable:: SUPERLU_ROOT
+#    This module provides the following imported targets, if found:
 #
-#    You may set this variable to have :ref:`FindSuperLU` look
-#    for the SuperLU package in the given path before inspecting
-#    system paths.
+#    :code:`SuperLU:SuperLU`
+#      Library and include directories for the found SuperLU.
 #
 
-find_package(BLAS QUIET)
+# text for feature summary
+include(FeatureSummary)
+set_package_properties("SuperLU" PROPERTIES
+  URL "https://portal.nersc.gov/project/sparse/superlu/"
+  DESCRIPTION "Supernodal LU")
 
-# look for header files, only at positions given by the user
-find_path(SUPERLU_INCLUDE_DIR
-  NAMES supermatrix.h
-  PATHS ${SUPERLU_PREFIX} ${SUPERLU_ROOT}
-  PATH_SUFFIXES "superlu" "SuperLU" "include/superlu" "include" "SRC"
-  NO_DEFAULT_PATH
-)
+set(SUPERLU_INT_TYPE "int" CACHE STRING
+  "The integer version that SuperLU was compiled for (Default is int.
+  Should be the same as int_t define in e.g. slu_sdefs.h")
 
-# look for header files, including default paths
-find_path(SUPERLU_INCLUDE_DIR
-  NAMES supermatrix.h
-  PATH_SUFFIXES "superlu" "SuperLU" "include/superlu" "include" "SRC"
-)
+find_package(BLAS QUIET)
 
-# look for library, only at positions given by the user
-find_library(SUPERLU_LIBRARY
-  NAMES "superlu"
-        "superlu_5.2.1" "superlu_5.2" "superlu_5.1.1" "superlu_5.1" "superlu_5.0"
-        "superlu_4.3" "superlu_4.2" "superlu_4.1" "superlu_4.0"
-  PATHS ${SUPERLU_PREFIX} ${SUPERLU_ROOT}
-  PATH_SUFFIXES "lib" "lib32" "lib64"
-  NO_DEFAULT_PATH
+find_path(SUPERLU_INCLUDE_DIR supermatrix.h
+  PATH_SUFFIXES "superlu" "SuperLU" "SRC"
 )
 
-# look for library files, including default paths
 find_library(SUPERLU_LIBRARY
   NAMES "superlu"
         "superlu_5.2.1" "superlu_5.2" "superlu_5.1.1" "superlu_5.1" "superlu_5.0"
-        "superlu_4.3" "superlu_4.2" "superlu_4.1" "superlu_4.0"
-  PATH_SUFFIXES "lib" "lib32" "lib64"
 )
 
-# check version specific macros
-include(CheckCSourceCompiles)
-include(CMakePushCheckState)
-cmake_push_check_state()
-
-# we need if clauses here because variable is set variable-NOTFOUND
-# if the searches above were not successful
-# Without them CMake print errors like:
-# "CMake Error: The following variables are used in this project, but they are set to NOTFOUND.
-# Please set them or make sure they are set and tested correctly in the CMake files:"
-#
-if(SUPERLU_INCLUDE_DIR)
-  set(CMAKE_REQUIRED_INCLUDES ${CMAKE_REQUIRED_INCLUDES} ${SUPERLU_INCLUDE_DIR})
-endif(SUPERLU_INCLUDE_DIR)
-if(SUPERLU_LIBRARY)
-  set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${SUPERLU_LIBRARY})
-endif(SUPERLU_LIBRARY)
-if(BLAS_LIBRARIES)
-  set(CMAKE_REQUIRED_LIBRARIES ${CMAKE_REQUIRED_LIBRARIES} ${BLAS_LIBRARIES})
-endif(BLAS_LIBRARIES)
-# check wether version is new enough >= 4.0
-check_c_source_compiles("
-typedef int int_t;
-#include <supermatrix.h>
-#include <slu_util.h>
-int main()
-{
-  SuperLUStat_t stat;
-  stat.expansions=8;
-  return 0;
-}" SUPERLU_MIN_VERSION_4)
-
-# check whether version is at least 4.3
-check_c_source_compiles("
-#include <slu_ddefs.h>
-int main(void)
-{
-  return SLU_DOUBLE;
-}"
-SUPERLU_MIN_VERSION_4_3)
-
-# check whether version is at least 5.0
-check_c_source_compiles("
-typedef int int_t;
-#include <supermatrix.h>
-#include <slu_util.h>
-int main(void)
-{
-  GlobalLU_t glu;
-  return 0;
-}"
-SUPERLU_MIN_VERSION_5)
-
-if(SUPERLU_MIN_VERSION_4_3)
-  include(CheckIncludeFiles)
-  set(HAVE_SLU_DDEFS_H 1)
-  check_include_files(slu_sdefs.h HAVE_SLU_SDEFS_H)
-  check_include_files(slu_cdefs.h HAVE_SLU_CDEFS_H)
-  check_include_files(slu_zdefs.h HAVE_SLU_ZDEFS_H)
-endif(SUPERLU_MIN_VERSION_4_3)
-
-cmake_pop_check_state()
-
-set(SUPERLU_INT_TYPE "int" CACHE STRING
-  "The integer version that SuperLU was compiled for (Default is int.
-  Should be the same as int_t define in e.g. slu_sdefs.h")
-
-if(NOT SUPERLU_MIN_VERSION_4)
-  set(SUPERLU_WITH_VERSION "SuperLU < 4.0" CACHE STRING
-    "Human readable string containing SuperLU version information.")
-else()
-  if(SUPERLU_MIN_VERSION_5)
-    set(SUPERLU_WITH_VERSION "SuperLU >= 5.0" CACHE STRING
-      "Human readable string containing SuperLU version information.")
-  elseif(SUPERLU_MIN_VERSION_4_3)
-    set(SUPERLU_WITH_VERSION "SuperLU >= 4.3" CACHE STRING
-      "Human readable string containing SuperLU version information.")
-  else()
-    set(SUPERLU_WITH_VERSION "SuperLU <= 4.2 and >= 4.0" CACHE STRING
-      "Human readable string containing SuperLU version information.")
+# check version of SuperLU
+find_file(SLU_UTIL_HEADER slu_util.h
+  HINTS ${SUPERLU_INCLUDE_DIR}
+  NO_DEFAULT_PATH)
+if(SLU_UTIL_HEADER)
+  file(READ "${SLU_UTIL_HEADER}" superluheader)
+  # get version number from defines in header file
+  string(REGEX REPLACE ".*#define SUPERLU_MAJOR_VERSION[ \t]+([0-9]+).*" "\\1"
+    SUPERLU_MAJOR_VERSION  "${superluheader}")
+  string(REGEX REPLACE ".*#define SUPERLU_MINOR_VERSION[ \t]+([0-9]+).*" "\\1"
+    SUPERLU_MINOR_VERSION  "${superluheader}")
+  string(REGEX REPLACE ".*#define SUPERLU_PATCH_VERSION[ \t]+([0-9]+).*" "\\1"
+    SUPERLU_PATCH_VERSION "${superluheader}")
+  if(SUPERLU_MAJOR_VERSION GREATER_EQUAL 0)
+    set(SuperLU_VERSION "${SUPERLU_MAJOR_VERSION}")
+  endif()
+  if (SUPERLU_MINOR_VERSION GREATER_EQUAL 0)
+    set(SuperLU_VERSION "${SuperLU_VERSION}.${SUPERLU_MINOR_VERSION}")
+  endif()
+  if (SUPERLU_PATCH_VERSION GREATER_EQUAL 0)
+    set(SuperLU_VERSION "${SuperLU_VERSION}.${SUPERLU_PATCH_VERSION}")
+  endif()
+  # if SUPERLU_MAJOR_VERSION not defined, SuperLU must be version 4 or older
+  if(NOT SuperLU_VERSION)
+    set(SuperLU_VERSION "4")
   endif()
 endif()
 
 # behave like a CMake module is supposed to behave
 include(FindPackageHandleStandardArgs)
-find_package_handle_standard_args(
-  "SuperLU"
-  DEFAULT_MSG
-  BLAS_FOUND
-  SUPERLU_INCLUDE_DIR
-  SUPERLU_LIBRARY
-  SUPERLU_MIN_VERSION_4
+find_package_handle_standard_args("SuperLU"
+  REQUIRED_VARS
+    SUPERLU_LIBRARY SUPERLU_INCLUDE_DIR SLU_UTIL_HEADER BLAS_FOUND
+  VERSION_VAR
+    SuperLU_VERSION
 )
 
-mark_as_advanced(SUPERLU_INCLUDE_DIR SUPERLU_LIBRARY)
+mark_as_advanced(SUPERLU_INCLUDE_DIR SUPERLU_LIBRARY SLU_UTIL_HEADER)
+
 
 # if both headers and library are found, store results
-if(SUPERLU_FOUND)
-  set(SUPERLU_INCLUDE_DIRS ${SUPERLU_INCLUDE_DIR})
-  set(SUPERLU_LIBRARIES    ${SUPERLU_LIBRARY})
+if(SuperLU_FOUND)
+  if(NOT TARGET SuperLU::SuperLU)
+    add_library(SuperLU::SuperLU UNKNOWN IMPORTED)
+    set_target_properties(SuperLU::SuperLU
+      PROPERTIES
+      IMPORTED_LOCATION ${SUPERLU_LIBRARY}
+      INTERFACE_INCLUDE_DIRECTORIES "${SUPERLU_INCLUDE_DIR}")
+    # Link BLAS library
+    if(TARGET BLAS::BLAS)
+      target_link_libraries(SuperLU::SuperLU
+        INTERFACE BLAS::BLAS)
+    else()
+      target_link_libraries(SuperLU::SuperLU
+        INTERFACE ${BLAS_LINKER_FLAGS} ${BLAS_LIBRARIES})
+    endif()
+  endif()
   # log result
   file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeOutput.log
-    "Determining location of ${SUPERLU_WITH_VERSION} succeeded:\n"
-    "Include directory: ${SUPERLU_INCLUDE_DIRS}\n"
-    "Library directory: ${SUPERLU_LIBRARIES}\n\n")
-  set(SUPERLU_DUNE_COMPILE_FLAGS "-I${SUPERLU_INCLUDE_DIRS}"
-    CACHE STRING "Compile flags used by DUNE when compiling SuperLU programs")
-  set(SUPERLU_DUNE_LIBRARIES ${SUPERLU_LIBRARIES} ${BLAS_LIBRARIES}
-    CACHE STRING "Libraries used by DUNE when linking SuperLU programs")
-else(SUPERLU_FOUND)
-  # log errornous result
+    "Determining location of SuperLU succeeded:\n"
+    "Include directory: ${SUPERLU_INCLUDE_DIR}\n"
+    "Library directory: ${SUPERLU_LIBRARY}\n\n")
+else()
+  # log erroneous result
   file(APPEND ${CMAKE_BINARY_DIR}${CMAKE_FILES_DIRECTORY}/CMakeError.log
     "Determining location of SuperLU failed:\n"
-    "Include directory: ${SUPERLU_INCLUDE_DIRS}\n"
-    "Library directory: ${SUPERLU_LIBRARIES}\n"
-    "Found unsupported version: ${SUPERLU_WITH_VERSION}\n\n")
-endif(SUPERLU_FOUND)
-
-# set HAVE_SUPERLU for config.h
-set(HAVE_SUPERLU ${SUPERLU_FOUND})
-
-# register all superlu related flags
-if(SUPERLU_FOUND)
-  dune_register_package_flags(COMPILE_DEFINITIONS "ENABLE_SUPERLU=1"
-                              LIBRARIES "${SUPERLU_DUNE_LIBRARIES}"
-                              INCLUDE_DIRS "${SUPERLU_INCLUDE_DIRS}")
+    "Include directory: ${SUPERLU_INCLUDE_DIR}\n"
+    "Library directory: ${SUPERLU_LIBRARY}\n")
 endif()
-
-# text for feature summary
-set_package_properties("SuperLU" PROPERTIES
-  DESCRIPTION "Supernodal LU"
-  PURPOSE "Direct solver for linear system, based on LU decomposition")

config.h.cmake

+// SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+// SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
 /* begin dune-istl
    put the definitions for config.h specific to
    your project here. Everything above will be
@@ -28,37 +30,10 @@
 
 /* end private */
 
-/* Define to ENABLE_SUPERLU if the SuperLU library is available */
-#cmakedefine HAVE_SUPERLU ENABLE_SUPERLU
-
 /* Define to the integer type that SuperLU was compiled for
    See e.g. what int_t is defined to in slu_sdefs.h */
 #cmakedefine SUPERLU_INT_TYPE @SUPERLU_INT_TYPE@
 
-/* Define to 1 if header slu_sdefs.h is there. */
-#cmakedefine01 HAVE_SLU_SDEFS_H
-
-/* Define to 1 if header slu_ddefs.h is there. */
-#cmakedefine01 HAVE_SLU_DDEFS_H
-
-/* Define to 1 if header slu_cdefs.h is there. */
-#cmakedefine01 HAVE_SLU_CDEFS_H
-
-/* Define to 1 if header slu_zdefs.h is there. */
-#cmakedefine01 HAVE_SLU_ZDEFS_H
-
-/* Define to ENABLE_ARPACKPP if the ARPACK++ library is available */
-#cmakedefine HAVE_ARPACKPP ENABLE_ARPACKPP
-
-/* Define to 0 as all versions since SuperLu 4.0 do no longer provide it that way. */
-#define HAVE_MEM_USAGE_T_EXPANSIONS 1
-
-/* define to 1 if SuperLU header slu_ddefs.h contains SLU_DOUBLE */
-#cmakedefine SUPERLU_MIN_VERSION_4_3 @SUPERLU_MIN_VERSION_4_3@
-
-/* define to 1 if SuperLU dgssvx takes a GlobalLU_t parameter */
-#cmakedefine SUPERLU_MIN_VERSION_5 @SUPERLU_MIN_VERSION_5@
-
 /* Define to the version of dune-istl */
 #define DUNE_ISTL_VERSION "${DUNE_ISTL_VERSION}"
 

doc/CMakeLists.txt

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 add_subdirectory(doxygen)
 
-dune_add_latex_document(istl.tex
-  FORCE_DVI
-  BIBFILES istl.bib
-  IMAGES blockstructure.eps)
-create_doc_install(istl.pdf
-  ${CMAKE_INSTALL_DOCDIR} istl_safepdf)
+dune_add_latex_document(
+  SOURCE istl.tex
+  FATHER_TARGET doc
+  INSTALL ${CMAKE_INSTALL_DOCDIR})

doc/blockstructure.eps.license

+SPDX-FileCopyrightInfo: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception

doc/doxygen/CMakeLists.txt

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 # shortcut for creating the Doxyfile.in and Doxyfile
 add_doxygen_target()
 

doc/doxygen/Doxylocal

+# SPDX-FileCopyrightText: Copyright © DUNE Project contributors, see file LICENSE.md in module root
+# SPDX-License-Identifier: LicenseRef-GPL-2.0-only-with-DUNE-exception
+
 INPUT                 += @srcdir@/mainpage.txt \
                          @srcdir@/modules.txt \
                          @top_srcdir@/dune/istl