CMakeLists.txt

cmake_minimum_required(VERSION 3.16)
project(gtkmm-CI-Example)
find_package(PkgConfig)
pkg_check_modules(GTKMM gtkmm-3.0)
# Set environment variables
add_subdirectory(lib)
add_subdirectory(src)
add_subdirectory(test)

find_package(Doxygen)
option(BUILD_DOCUMENTATION "Create and install the HTML based API        
documentation (requires Doxygen)" ${DOXYGEN_FOUND})

if(BUILD_DOCUMENTATION)
    if(NOT DOXYGEN_FOUND)
         message(FATAL_ERROR "Doxygen is needed to build the documentation.")
    endif()

    set(doxyfile_in ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile)
    set(doxyfile ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile)

    configure_file(${doxyfile_in} ${doxyfile} @ONLY)


    add_custom_target(docs
                      COMMAND ${DOXYGEN_EXECUTABLE} ${doxyfile_in}
                      WORKING_DIRECTORY ${CMAKE_CURRENT_SOURCE_DIR}/docs
                      COMMENT "Generating API documentation with Doxygen"
                      VERBATIM)

    #    install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html DESTINATION     share/docs)
endif()