缺少文件

from ._nms import lib as _lib, ffi as _ffi
from ._crop_resize import lib as _lib, ffi as _ffi
from ._roi_align import lib as _lib, ffi as _ffi
from ._roi_crop import lib as _lib, ffi as _ffi
这些文件没有，我尝试了make.sh，结果生成了.so文件，请问这是咋回事啊。