Unknown CMake command "cuda_select_nvcc_arch_flags"

C++
1

I am using cmake in my application and it results in the following errors:

CMake Error at /home/divyansh/Documents/libtorch-cxx11-abi-shared-with-deps-2.0.1+cu118/libtorch/share/cmake/Caffe2/public/utils.cmake:401 (cuda_select_nvcc_arch_flags):
  Unknown CMake command "cuda_select_nvcc_arch_flags".
Call Stack (most recent call first):
  /home/divyansh/Documents/libtorch-cxx11-abi-shared-with-deps-2.0.1+cu118/libtorch/share/cmake/Caffe2/public/cuda.cmake:362 (torch_cuda_get_nvcc_gencode_flag)
  /home/divyansh/Documents/libtorch-cxx11-abi-shared-with-deps-2.0.1+cu118/libtorch/share/cmake/Caffe2/Caffe2Config.cmake:88 (include)
  /home/divyansh/.local/lib/python3.10/site-packages/torch/share/cmake/Torch/TorchConfig.cmake:68 (find_package)
  CMakeLists.txt:290 (find_package)

My cmake version is 3.27.0

2

Double post from here.

3

That issue is 5 years old, the assignees might not respond, so I opened an issue here. Sorry for the repetition.

4

Based on a few related issues, such as this one, it seems updating cmake to >=3.9 fixes the issue. However, I’m unsure why it’s not working with your newer version, as I’m also using 3.27.4 and haven’t seen the error.

5

Thank you for your response! Do you have any suggestions on how I can know what the issue is?

6

Update: Specifying the path of the torch configuration files using -DCMAKE_PREFIX_PATH resolved the issue.