if(GINKGO_BUILD_EXTLIB_EXAMPLE)
    # This is just an example of the CMakeLists.txt file that can be used after the
    # correct version of deal.ii has been installed.
    cmake_minimum_required(VERSION 3.16)
    project(DEAL_II_EXAMPLE LANGUAGES CXX)

    find_package(MPI 3.1 COMPONENTS CXX REQUIRED)

    set(deal.II_DIR "/path/to/deal.ii/installation")
    find_package(deal.II 9.0.0 REQUIRED HINTS ${deal.II_DIR} ${DEAL_II_DIR})
    deal_ii_initialize_cached_variables()

    set(CMAKE_INSTALL_RPATH_USE_LINK_PATH TRUE)

    set(run_target "external-lib-interfacing")
    add_executable(${PROJECT_NAME} "")
    target_sources(${PROJECT_NAME} PRIVATE ${run_target}.cpp)
    target_compile_options(${PROJECT_NAME} PRIVATE -g -Wall)
    target_compile_definitions(${PROJECT_NAME} PRIVATE OMPI_SKIP_MPICXX)

    target_link_libraries(${PROJECT_NAME} ${MPI_C_LIBRARIES} Ginkgo::ginkgo)

    target_include_directories(
        ${PROJECT_NAME}
        PRIVATE ${MPI_C_INCLUDE_PATH} ${GINKGO_INC_DIR} ${GINKGO_LIB_DIR}
    )

    deal_ii_setup_target(${PROJECT_NAME})
endif()