Matconvnet is not compiling with gpu using matlab 2019 b?

Question

I am using MATLAB 2019b, CUDA toolkit 10.1 and visual studio 2017. I am able to compile the CPU version. but here is the error I get while compiling GPU version.

vl_compilenn('enableGpu', true, ...

'cudaRoot', 'C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1', ... 'cudaMethod', 'nvcc', ... 'enableCudnn', true, ... 'cudnnRoot', 'C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1');

the message error: nvcc fatal : '-DNDEBUG': expected a number Error using vl_compilenn>nvcc_compile (line 615) Command "C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\bin\nvcc" -c -o "G:\matconvnet-1.0-beta25\matlab\mex.build\bits\data.obj" "G:\matconvnet-1.0-beta25\matlab\src\bits\data.cu" -DENABLE_GPU -DENABLE_DOUBLE -DENABLE_CUDNN -I"C:\Program Files\NVIDIA GPU Computing Toolkit\CUDA\v10.1\include" -O -DNDEBUG -D_FORCE_INLINES --std=c++11 -I"G:\programme\extern\include" -I"G:\programme\toolbox\distcomp\gpu\extern\include" -gencode=arch=compute_61,code="sm_61,compute_61" --compiler-options=/MD

https://github.com/vlfeat/matconvnet/issues/1212 and https://groups.google.com/g/matconvnet/c/TlLp9g7s-6g seems like a defect in `vl_compilenn.m` — Robert Crovella, Jun 26 '20 at 22:51
change `-O` to `-O3` [here](https://github.com/vlfeat/matconvnet/blob/master/matlab/vl_compilenn.m#L340). — Robert Crovella, Jun 26 '20 at 22:59

Matconvnet is not compiling with gpu using matlab 2019 b?

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