required shared library libtorch.so not found

[yurivict]

During the 'install' phase it prints messages like these:

(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_rw_cpu.so - required shared library libc10.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_rw_cpu.so - required shared library libtorch.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_rw_cpu.so - required shared library libtorch_cpu.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_rw_cpu.so - required shared library libtorch_python.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_saint_cpu.so - required shared library libc10.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_saint_cpu.so - required shared library libtorch.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_saint_cpu.so - required shared library libtorch_cpu.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_saint_cpu.so - required shared library libtorch_python.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_sample_cpu.so - required shared library libc10.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_sample_cpu.so - required shared library libtorch.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_sample_cpu.so - required shared library libtorch_cpu.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_sample_cpu.so - required shared library libtorch_python.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_spmm_cpu.so - required shared library libc10.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_spmm_cpu.so - required shared library libtorch.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_spmm_cpu.so - required shared library libtorch_cpu.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_spmm_cpu.so - required shared library libtorch_python.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_version_cpu.so - required shared library libc10.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_version_cpu.so - required shared library libtorch.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_version_cpu.so - required shared library libtorch_cpu.so not found
(py39-torch-sparse-0.6.18) /usr/ports/misc/py-torch-sparse/work-py39/stage//usr/local/lib/python3.9/site-packages/torch_sparse/_version_cpu.so - required shared library libtorch_python.so not found

All these libraries are installed in:

$ ls -l /usr/local/lib/python3.9/site-packages/torch/lib/
total 151796
-rwxr-xr-x  1 root wheel    799256 Apr 11 06:57 libc10.so
-rwxr-xr-x  1 root wheel     35384 Apr 11 06:57 libshm.so
-rwxr-xr-x  1 root wheel      7632 Apr 11 06:57 libtorch.so
-rwxr-xr-x  1 root wheel 138928792 Apr 11 06:57 libtorch_cpu.so
-rwxr-xr-x  1 root wheel      4176 Apr 11 06:57 libtorch_global_deps.so
-rwxr-xr-x  1 root wheel  15440664 Apr 11 06:57 libtorch_python.so

To link to them properly you need to provide this argument to the linker:

-Wl,-rpath=/usr/local/lib/python3.9/site-packages/torch/lib/

[rusty1s]

These should be automatically linked by PyTorch via the CPUExtension, see here. Wondering why this is not the case for you.