opencv/modules/CMakeLists.txt

file(GLOB ocvmodules RELATIVE "${CMAKE_CURRENT_SOURCE_DIR}" "${CMAKE_CURRENT_SOURCE_DIR}/*")
if(ocvmodules)
    list(SORT ocvmodules)
endif()

foreach(mod ${ocvmodules})
    if(EXISTS "${CMAKE_CURRENT_SOURCE_DIR}/${mod}/CMakeLists.txt")
        add_subdirectory("${mod}")
    endif()
endforeach()