option(BUILD_DOXYGEN_DOC "Build documentation with Doxygen" OFF)
set_property(CACHE BUILD_DOXYGEN_DOC PROPERTY STRINGS ON OFF)

function(add_doxygen_target)
  if (BUILD_DOXYGEN_DOC)
    find_package(Doxygen REQUIRED)

    set(options)
    set(oneValueArgs TARGET_NAME IN OUT)
    set(multiValueArgs)

    cmake_parse_arguments(_DOXYGEN "${options}" "${oneValueArgs}" "${multiValueArgs}" ${ARGN})

    configure_file(${_DOXYGEN_IN} ${_DOXYGEN_OUT} @ONLY)
    message("Doxygen build started")

    add_custom_target(${_DOXYGEN_TARGET}
      COMMAND ${DOXYGEN_EXECUTABLE} ${DOXYGEN_OUT}
      WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
      COMMENT "Generating API documentation with Doxygen"
      VERBATIM )
  endif()
endfunction()