centos+3090+cuda11+pytorch1.7下安装Warpctc

cuda11+cudnn8：https://blog.youkuaiyun.com/qq_33266320/article/details/113186054

pytorch安装：https://pytorch.org/（好像官网截止2021.1.28为止只有支持到cuda11.0，我在cuda11.1下装了下，也能用，但是很多操作跑到GPU了，现在准备源码安装）

            pytorch源码编译cudn8以上会报错，pip install numpy ninja pyyaml mkl mkl-include setuptools cmake cffi typing_extensions future six requests dataclasses

Found CUDNN: /usr/local/cuda-11.1/lib64/libcudnn.so  
-- Found cuDNN: v?  (include: /usr/local/cuda-11.1/include, library: /usr/local/cuda-11.1/lib64/libcudnn.so)
CMake Error at /home/saini/anaconda3/lib/python3.7/site-packages/torch/share/cmake/Caffe2/public/cuda.cmake:174 (message):
  PyTorch requires cuDNN 7 and above.

                https://github.com/pytorch/pytorch/issues/41593参考这里，移动version.h文件

更新gcc版本：http://www.vpser.net/manage/centos-6-upgrade-gcc.html   我直接用7.3的可以用

warpctc安装：https://github.com/guanfaqian/warp-ctc（直接git clone这个，不要clone百度以及）