* This module provides an interface to the KLU library which is part of the <a href="http://www.suitesparse.com">suitesparse</a> package.
* It provides the following factorization class:
* - class KLU: a sparse LU factorization, well-suited for circuit simulation.
*
* \code
* #include <Eigen/KLUSupport>
* \endcode
*
* In order to use this module, the klu and btf headers must be accessible from the include paths, and your binary must be linked to the klu library and its dependencies.
* The dependencies depend on how umfpack has been compiled.
* For a cmake based project, you can use our FindKLU.cmake module to help you in this task.