add_files(
    afterload.cpp
    ai_sl.cpp
    airport_sl.cpp
    animated_tile_sl.cpp
    autoreplace_sl.cpp
    cargomonitor_sl.cpp
    cargopacket_sl.cpp
    cheat_sl.cpp
    company_sl.cpp
    depot_sl.cpp
    economy_sl.cpp
    engine_sl.cpp
    game_sl.cpp
    gamelog_sl.cpp
    goal_sl.cpp
    group_sl.cpp
    industry_sl.cpp
    labelmaps_sl.cpp
    linkgraph_sl.cpp
    map_sl.cpp
    misc_sl.cpp
    newgrf_sl.cpp
    newgrf_sl.h
    object_sl.cpp
    oldloader.cpp
    oldloader.h
    oldloader_sl.cpp
    order_sl.cpp
    saveload.cpp
    saveload.h
    saveload_filter.h
    saveload_internal.h
    signs_sl.cpp
    station_sl.cpp
    storage_sl.cpp
    strings_sl.cpp
    story_sl.cpp
    subsidy_sl.cpp
    town_sl.cpp
    vehicle_sl.cpp
    waypoint_sl.cpp
)