CMakeLists.txt

# check if Doxygen is installed
find_package(Doxygen)
if (DOXYGEN_FOUND)
    # set input and output files
    set(DOXYGEN_IN ${CMAKE_CURRENT_SOURCE_DIR}/../docs/Doxyfile.in)
    set(DOXYGEN_OUT ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)

    set(abs_srcdir ${CMAKE_CURRENT_SOURCE_DIR})
    set(abs_builddir ${CMAKE_CURRENT_BINARY_DIR})
    set(enable_searchengine "NO")
    set(searchengine_url "")
    set(enable_server_based_search "NO")
    set(enable_external_search "NO")
    set(extra_search_mappings "")
    set(mlir_doxygen_generate_qhp "NO")
    set(mlir_doxygen_qch_filename "")
    set(mlir_doxygen_qhp_namespace "")
    set(mlir_doxygen_qhelpgenerator_path "")
    set(mlir_doxygen_qhp_cust_filter_name "")
    set(mlir_doxygen_qhp_cust_filter_attrs "")

    # request to configure the file
    configure_file(${DOXYGEN_IN} ${DOXYGEN_OUT} @ONLY)
    message("Doxygen build started")

    # note the option ALL which allows to build the docs together with the application
    add_custom_target(doc_doxygen # ALL
        COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
        DEPENDS doxygen-mainpage.dox
        WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
        COMMENT "Generating API documentation with Doxygen"
        VERBATIM)
else (DOXYGEN_FOUND)
  message("Doxygen need to be installed to generate the doxygen documentation")
endif (DOXYGEN_FOUND)