AddMPFRFlags
-----------

Helpers for using `MPFR <https://github.com/advanpix/mpreal>`_ from DUNE targets.

.. cmake:command:: add_dune_mpfr_flags

  Link the given targets against ``MPFR::mpreal`` and add the compile
  definition ``HAVE_MPFR=1``.

  The command has an effect only when ``MPFR_FOUND`` is true.

  .. code-block:: cmake

    add_dune_mpfr_flags(<target> [<target>...])

  ``targets``
    One or more existing targets to configure.