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# add a target to generate API documentation with Doxygen
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(doxy_main_page ${CMAKE_CURRENT_SOURCE_DIR}/../README.md)
set(doxyfile_in ${CMAKE_CURRENT_SOURCE_DIR}/Doxyfile.in)
set(doxyfile ${CMAKE_CURRENT_BINARY_DIR}/Doxyfile)
configure_file(${doxyfile_in} ${doxyfile} @ONLY)
add_custom_target(doc
COMMAND ${DOXYGEN_EXECUTABLE} ${doxyfile}
WORKING_DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}
COMMENT "Generating API documentation with Doxygen"
VERBATIM)
install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html DESTINATION share/doc OPTIONAL)
endif()
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