'libtorch and pytorch cannot be installed simultaneously?

I am learning to develop with PyTorch as well as LibTorch. I have the following line in my ~/.bashrc for dynamic linking of libtorch libraries:

# libtorch linking path
export LD_LIBRARY_PATH=$LD_LIBRARY_PATH:/home/user/.dev_libraries/libtorch/lib/

However, when this path is in LD_LIBRARY_PATH, importing torch in Python reports segmentation fault:

user@host:~$ $LD_LIBRARY_PATH 
bash: /home/user/packages/embree-2.16.0.x86_64.linux/lib:/home/user/packages/embree-2.16.0.x86_64.linux/lib::/usr/local/lib/:/usr/local/cuda-11.1/lib64:/usr/local/lib/:/usr/local/cuda-11.1/lib64:/home/user/.dev_libraries/libtorch-cpu/libtorch/lib/: No such file or directory
user@host:~$ python
Python 3.8.10 (default, Jun  2 2021, 10:49:15) 
[GCC 9.4.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import torch
Segmentation fault (core dumped)
user@host:~$

As soon as I remove that path from the environment variable LD_LIBRARY_PATH, torch can be correctly imported in Python.

I am guessing the cause is that some shared libraries of PyTorch having the same names as the ones in LibTorch. Does this mean PyTorch and LibTorch cannot be installed simultaneously, or is my environment setting incorrect? I'd prefer not to reset LD_LIBRARY_PATH every time I switch between the two.

System specs:

pythonlinuxpytorchlibtorch


Solution 1:[1]

I faced the same problem too. You can type

import torch
print(torch.__version__)

to see the version of torch, and use the same version of libtorch, that would solve the problem probably.

Sources

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Source: Stack Overflow

Solution Source
Solution 1 Tumb1eweed

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