Windows下运行编译报错

[YaoTeM]

(pointpillars) PS D:\Anaconda3\PointPillars> cd ops
(pointpillars) PS D:\Anaconda3\PointPillars\ops> python setup.py develop
running develop
running egg_info
writing pointpillars.egg-info\PKG-INFO
writing dependency_links to pointpillars.egg-info\dependency_links.txt
writing top-level names to pointpillars.egg-info\top_level.txt
D:\Anaconda3\envs\pointpillars\lib\site-packages\torch\utils\cpp_extension.py:411: UserWarning: Attempted to use ninja as the BuildExtension backend but we could not find ninja.. Falling back to using the slow distutils backend.
warnings.warn(msg.format('we could not find ninja.'))
reading manifest file 'pointpillars.egg-info\SOURCES.txt'
writing manifest file 'pointpillars.egg-info\SOURCES.txt'
running build_ext
D:\Anaconda3\envs\pointpillars\lib\site-packages\torch\utils\cpp_extension.py:346: UserWarning: Error checking compiler version for cl: [WinError 2] 系统找不 到 指定的文件。
warnings.warn(f'Error checking compiler version for {compiler}: {error}')
copying build\lib.win-amd64-3.8\voxel_op.cp38-win_amd64.pyd ->
copying build\lib.win-amd64-3.8\iou3d_op.cp38-win_amd64.pyd ->
Creating d:\anaconda3\envs\pointpillars\lib\site-packages\pointpillars.egg-link (link to .)
pointpillars 0.0.0 is already the active version in easy-install.pth

Installed d:\anaconda3\pointpillars\ops
Processing dependencies for pointpillars==0.0.0
Finished processing dependencies for pointpillars==0.0.0