add_subdirectory(settings) add_files( airport_defaults.h airport_movement.h airporttile_ids.h airporttiles.h animcursors.h autorail.h bridge_land.h build_industry.h cargo_const.h clear_land.h control_codes.h elrail_data.h engines.h genland.h heightmap_colours.h industry_land.h landscape_sprite.h newgrf_debug_data.h object_land.h palette_convert.h palettes.h pricebase.h railtypes.h road_land.h roadtypes.h roadveh_movement.h sprites.h station_land.h strgen_tables.h string_colours.h town_land.h townname.h track_land.h train_cmd.h tree_land.h unicode.h water_land.h ) add_files( opengl_shader.h CONDITION OPENGL_FOUND )