MatConvNet error on vl_compilenn on GPU

I have

• Matlab R2020a on win10_x64 OS
• Visual Studio 2019
• Cuda 11.1, the latest cudnn
• matconvnet-1.0-beta25

I am trying to compile MatConvNet with the following command

vl_compilenn('enableGpu', true, 'cudaMethod', 'nvcc', ...
               'cudaRoot', 'C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.1', ...
               'enableCudnn', true, 'cudnnRoot', 'C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.1');

And getting an error even after following some suggestions from the users with the same problem. I have tried changing cl_path to the path where cl.exe is located and set -O to -O0 in the vl_compilenn. Now, here is my error

E:\Matlab\R2020a\matconvnet-1.0-beta25\matlab\src\bits\datacu.hpp(89): error: identifier "cudnnConvolutionFwdPreference_t" is undefined 
 
E:\Matlab\R2020a\matconvnet-1.0-beta25\matlab\src\bits\datacu.hpp(94): error: identifier "cudnnConvolutionBwdFilterPreference_t" is undefined 
 
E:\Matlab\R2020a\matconvnet-1.0-beta25\matlab\src\bits\datacu.hpp(99): error: identifier "cudnnConvolutionBwdDataPreference_t" is undefined 
 
E:\Matlab\R2020a\matconvnet-1.0-beta25\matlab\src\bits\datacu.hpp(141): error: identifier "cudnnConvolutionFwdPreference_t" is undefined 
 
E:\Matlab\R2020a\matconvnet-1.0-beta25\matlab\src\bits\datacu.hpp(147): error: identifier "cudnnConvolutionBwdFilterPreference_t" is undefined 
 
E:\Matlab\R2020a\matconvnet-1.0-beta25\matlab\src\bits\datacu.hpp(153): error: identifier "cudnnConvolutionBwdDataPreference_t" is undefined 
 
6 errors detected in the compilation of "E:/Matlab/R2020a/matconvnet-1.0-beta25/matlab/src/bits/data.cu". 
nvcc warning : The 'compute_35', 'compute_37', 'compute_50', 'sm_35', 'sm_37' and 'sm_50' architectures are deprecated, and may be removed in a future release (Use -Wno-deprecated-gpu-targets to suppress warning). 
nvcc warning : The -std=c++11 flag is not supported with the configured host compiler. Flag will be ignored. 
data.cu 
Error using vl_compilenn>nvcc_compile (line 615)
Command "C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.1\bin\nvcc" -c -o
"E:\Matlab\R2020a\matconvnet-1.0-beta25\matlab\mex\.build\bits\data.obj"
"E:\Matlab\R2020a\matconvnet-1.0-beta25\matlab\src\bits\data.cu" -DENABLE_GPU -DENABLE_DOUBLE
-DENABLE_CUDNN -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v11.1\include" -O0 -DNDEBUG
-D_FORCE_INLINES --std=c++11 -I"E:\Matlab\R2020a\extern\include"
-I"E:\Matlab\R2020a\toolbox\parallel\gpu\extern\include"
-gencode=arch=compute_50,code=\"sm_50,compute_50\"  --compiler-options=/MD
--compiler-bindir="C:\Program Files (x86)\Microsoft Visual
Studio\2019\Community\VC\Tools\MSVC\14.27.29110\bin\Hostx64\x64"  failed.

Error in vl_compilenn (line 487)
      nvcc_compile(opts, srcs{i}, objfile, flags) ;

Please, suggest what can I do to avoid this problem

[E]

Use cuda 10.1 and cudnn 7.

Cudnn 8 made changes that break older versions.

[sonic sonic]

I encounter the same problem.

[sonic sonic]

This is the solution to the problem

https://blog.csdn.net/qq_17783559/article/details/105474663