If a linear algebra backend is selected using the -DBACKEND=...
cmake flag, the find_package
should be REQUIRED
. Also, if neither Eigen nor MTL is selected, the fallback dune-istl must be available.
If a linear algebra backend is selected using the -DBACKEND=...
cmake flag, the find_package
should be REQUIRED
. Also, if neither Eigen nor MTL is selected, the fallback dune-istl must be available.