cmake .. 命令运行不了

[Airgods]

所题所述，在安装ncnn架构时，无法使用cmake .. 命令，经过我的调查，是因为cuda版本不够，但是我并不确定，请问有大佬能看是具体是因为什么报错：
(ncnn) llm@161-amax:~/open-source/ncnn/tools/pnnx/build$ cmake ..
-- Using cached Torch root = /data1/llm/anaconda3/envs/ncnn/lib/python3.8/site-packages/torch/share/cmake
CMake Error at /usr/local/share/cmake-3.19/Modules/CMakeDetermineCompilerId.cmake:642 (message):
Compiling the CUDA compiler identification source file
"CMakeCUDACompilerId.cu" failed.

Compiler: /usr/bin/nvcc

Build flags:

Id flags:
--keep;--keep-dir;tmp;-gencode=arch=compute_50,code=sm_50;-gencode=arch=compute_60,code=sm_60;-gencode=arch=compute_80,code=sm_80
-v

The output was:

1

nvcc fatal : Unsupported gpu architecture 'compute_80'

Call Stack (most recent call first):
/usr/local/share/cmake-3.19/Modules/CMakeDetermineCompilerId.cmake:34 (CMAKE_DETERMINE_COMPILER_ID_BUILD)
/usr/local/share/cmake-3.19/Modules/CMakeDetermineCUDACompiler.cmake:262 (CMAKE_DETERMINE_COMPILER_ID)
/data1/llm/anaconda3/envs/ncnn/lib/python3.8/site-packages/torch/share/cmake/Caffe2/public/cuda.cmake:47 (enable_language)
/data1/llm/anaconda3/envs/ncnn/lib/python3.8/site-packages/torch/share/cmake/Caffe2/Caffe2Config.cmake:92 (include)
/data1/llm/anaconda3/envs/ncnn/lib/python3.8/site-packages/torch/share/cmake/Torch/TorchConfig.cmake:68 (find_package)
CMakeLists.txt:45 (find_package)

-- Configuring incomplete, errors occurred!
See also "/data1/llm/open-source/ncnn/tools/pnnx/build/CMakeFiles/CMakeOutput.log".
See also "/data1/llm/open-source/ncnn/tools/pnnx/build/CMakeFiles/CMakeError.log".

[nihui]

错误是cuda相关，可以安装 cpu only 的 torch 编译pnnx
pnnx 不需要gpu支持的