硬件环境：
1、显卡：2080Ti
2、CUDA环境：cuda11.1
虚拟环境：
1、python：3.8
2、pytorch：1.10.1+cu111
3、torchvision ：0.11.2+cu111
附上pytorch、torchvision对应cuda版本安装命令（以cuda11.1为例）：
官方链接：Previous PyTorch Versions | PyTorch
# CUDA 11.1
pip install torch==1.10.1+cu111 torchvision==0.11.2+cu111 torchaudio==0.10.1 -f https://download.pytorch.org/whl/torch_stable.html切记：安装环境条件一定要按照detectron2官方来：
-
Linux 或 macOS with Python ≥ 3.6
-
PyTorch ≥ 1.8 和与 PyTorch 安装相匹配的 Torchvision。
-
OpenCV是可选的，但演示和可视化需要
问题描述：
运行 python -m pip install -e detectron2，安装时中途出现报错：
Installing collected packages: detectron2
? Running setup.py develop for detectron2
? ? ERROR: Command errored out with exit status 1:
? ? ?command: /opt/conda/bin/python -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/user-data/DynamicHead-master/detectron2/setup.py'"'"'; __file__='"'"'/user-data/DynamicHead-master/detectron2/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' develop --no-deps
? ? ? ? ?cwd: /user-data/DynamicHead-master/detectron2/
? ? Complete output (17 lines):
? ? running develop
? ? running egg_info
? ? writing detectron2.egg-info/PKG-INFO
? ? writing dependency_links to detectron2.egg-info/dependency_links.txt
? ? writing requirements to detectron2.egg-info/requires.txt
? ? writing top-level names to detectron2.egg-info/top_level.txt
? ? reading manifest file 'detectron2.egg-info/SOURCES.txt'
? ? adding license file 'LICENSE'
? ? writing manifest file 'detectron2.egg-info/SOURCES.txt'
? ? running build_ext
? ? /opt/conda/lib/python3.8/site-packages/setuptools/command/easy_install.py:144: EasyInstallDeprecationWarning: easy_install command is deprecated. Use build and pip and other standards-based tools.
? ? ? warnings.warn(
? ? /opt/conda/lib/python3.8/site-packages/setuptools/command/install.py:34: SetuptoolsDeprecationWarning: setup.py install is deprecated. Use build and pip and other standards-based tools.
? ? ? warnings.warn(
? ? /opt/conda/lib/python3.8/site-packages/pkg_resources/__init__.py:123: PkgResourcesDeprecationWarning: 4.0.0-unsupported is an invalid version and will not be supported in a future release
? ? ? warnings.warn(
? ? error: [Errno 2] No such file or directory: "'/usr/local/cuda'/bin/nvcc"
? ? ----------------------------------------
ERROR: Command errored out with exit status 1: /opt/conda/bin/python -c 'import io, os, sys, setuptools, tokenize; sys.argv[0] = '"'"'/user-data/DynamicHead-master/detectron2/setup.py'"'"'; __file__='"'"'/user-data/DynamicHead-master/detectron2/setup.py'"'"';f = getattr(tokenize, '"'"'open'"'"', open)(__file__) if os.path.exists(__file__) else io.StringIO('"'"'from setuptools import setup; setup()'"'"');code = f.read().replace('"'"'\r\n'"'"', '"'"'\n'"'"');f.close();exec(compile(code, __file__, '"'"'exec'"'"'))' develop --no-deps Check the logs for full command output.
找了很多文章，更新了很多包，但是都没有效果。最终发现原因为nvcc的路径有问题：
? error: [Errno 2] No such file or directory: "'/usr/local/cuda'/bin/nvcc"
?解决方案：
输入命令行：
export CUDA_HOME=/usr/local/cuda最终安装成功！！！
?可能有用的参考链接：
?https://blog.csdn.net/qq_39031960/article/details/106211878
?https://blog.csdn.net/m0_37661841/article/details/108318364
?https://blog.csdn.net/chen645096127/article/details/111563985
