Merge branch 'issue/suitesparse-find-package' into 'master'

Move the find_package(SuiteSparse) from istl to common

See merge request core/dune-common!1284

CHANGELOG.md

@@ -58,6 +58,8 @@ In order to build the DUNE core modules you need at least the following software
 
 ## Build System
 
+- Try to find SuiteSparse during configuration.
+
 - The function `dune_add_library(<lib> ...)` now requires to provide `EXPORT_NAME` or `NO_EXPORT`.
   Moreover, a namespace can be specified via the argument `NAMESPACE` which defaults to `Dune::` and is prepended to the export name.
   We recommend to choose an export name with a camel title case matching your

cmake/modules/DuneCommonMacros.cmake

@@ -37,6 +37,10 @@ include(AddMETISFlags)
 find_package(ParMETIS 4.0)
 include(AddParMETISFlags)
 
+# find libraries for sparse matrix factorizations
+find_package(SuiteSparse OPTIONAL_COMPONENTS CHOLMOD LDL SPQR UMFPACK)
+include(AddSuiteSparseFlags)
+
 # try to find the Vc library
 set(MINIMUM_VC_VERSION)
 if((CMAKE_CXX_COMPILER_ID STREQUAL Clang) AND