find_program(DOXYGEN doxygen) if (NOT DOXYGEN) message(STATUS "Target 'doc' disabled (requires doxygen)") return () endif () add_custom_target(doc COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/build.py ${FMT_VERSION} SOURCES build.py conf.py _templates/layout.html) install(DIRECTORY ${CMAKE_CURRENT_BINARY_DIR}/html/ DESTINATION share/doc/fmt OPTIONAL)