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# add a target to generate API documentation with Doxygen
find_package(Doxygen QUIET)
if(DOXYGEN_FOUND)
set(GUDHI_MODULES ${GUDHI_MODULES} "cpp-documentation" CACHE INTERNAL "GUDHI_MODULES")
# starting from cmake 3.9 the usage of DOXYGEN_EXECUTABLE is deprecated
if(TARGET Doxygen::doxygen)
get_property(DOXYGEN_EXECUTABLE TARGET Doxygen::doxygen PROPERTY IMPORTED_LOCATION)
endif()
add_custom_target(doxygen ${DOXYGEN_EXECUTABLE} ${GUDHI_USER_VERSION_DIR}/Doxyfile
WORKING_DIRECTORY ${GUDHI_USER_VERSION_DIR}
COMMENT "Generating API documentation with Doxygen in ${GUDHI_USER_VERSION_DIR}/doc/html/" VERBATIM)
if(TARGET user_version)
# In dev version, doxygen target depends on user_version target. Not existing in user version
add_dependencies(doxygen user_version)
endif()
else()
set(GUDHI_MISSING_MODULES ${GUDHI_MISSING_MODULES} "cpp-documentation" CACHE INTERNAL "GUDHI_MISSING_MODULES")
endif()
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