Hello,
Sorry, the libtorch you can download from pytorch.org 64 is based on x64(amd64) architecture. Other architecture’s libtorch ( armv7l on raspberry pi(raspian), aarch64(arm64) on raspberry pi(ubuntu) ) and pytorch must be compiled from source, or ask somebody else to get the compiled result.
I want to tell you my experience of building libtorch on Raspberry 4 4GB (Raspian, armv7l)
Since you just want the libtorch C++ api, and Python API is not in consideration, and QNX is a UNIX operating system. emm…
you QNX should have a python3.5+ (I tested cmake+make, but it does not work at all, so I changed the reply here)
clone the pytorch source code:
git clone --recursive https://github.com/pytorch/pytorch.git

and then
cd pytorch
python3 tools/build_libtorch.py

to get libtorch on aarch64(arm64) devices.
(in fact, as far as I observed from pytorch’s building guide, this building method(cmake+make) is not that recommended, but it works)
Compiling directly on arm device really needs a long time… so if possible, you can try cross-platform compiling tools. I do not know if there exists that tool and option for compiling libtorch.
That is what i have experienced and thought, hope it might help you a little.
yours sincerely,
@wmf1997