Add nn~ build script for Linux

[devstermarts]

raspberrypi.sh runs into errors with Torch (e.g. searching for Torch cmake configuration files). This script uses libtorch in a temp folder to build nn~ for Linux.

[maurice-jo]

Hi there,

I've been following the instructions for the linux build as the raspberrypi.sh was giving me errors. It seems like I'm close but now I'm getting the following error.

-- Build files have been written to: /home/sonicagent1/nn_tilde/build
[ 20%] Building CXX object backend/CMakeFiles/backend.dir/parsing_utils.cpp.o
[ 40%] Building CXX object backend/CMakeFiles/backend.dir/backend.cpp.o
[ 60%] Linking CXX static library libbackend.a
[ 60%] Built target backend
[ 80%] Building CXX object frontend/puredata/nn_tilde/CMakeFiles/nn.dir/nn_tilde.cpp.o
[100%] Linking CXX shared library "nn~.pd_linux"
/usr/bin/ld: /home/sonicagent1/nn_tilde/lib/libtorch/lib/libtorch.so: error adding symbols: file in wrong format
collect2: error: ld returned 1 exit status
make[2]: *** [frontend/puredata/nn_tilde/CMakeFiles/nn.dir/build.make:102: frontend/puredata/nn_tilde/nn~.pd_linux] Error 1
make[1]: *** [CMakeFiles/Makefile2:142: frontend/puredata/nn_tilde/CMakeFiles/nn.dir/all] Error 2
make: *** [Makefile:91: all] Error 2
cp: cannot stat 'frontend/puredata/nn_tilde/nn~.pd_linux': No such file or directory

Any advice on how to fix this as it seems connected to the libtorch.so?

I'm running a Pi 5 with bookworm.

[hongyue-howard-wang]

/home/sonicagent1/nn_tilde/lib/libtorch/lib/libtorch.so: error adding symbols: file in wrong f

Hi,
I also met this issue this morning, do you know how to slove it?

jbabr@vibeplate:~/nn_tilde/build $ make [ 60%] Built target backend [ 80%] Linking CXX shared library "nn~.pd_linux" /home/jbabr/nn_tilde/lib/libtorch/lib/libtorch.so: file not recognized: file format not recognized collect2: error: ld returned 1 exit status make[2]: *** [frontend/puredata/nn_tilde/CMakeFiles/nn.dir/build.make:108: frontend/puredata/nn_tilde/nn~.pd_linux] Error 1 make[1]: *** [CMakeFiles/Makefile2:161: frontend/puredata/nn_tilde/CMakeFiles/nn.dir/all] Error 2 make: *** [Makefile:103: all] Error 2
I am running a Pi 4.

[caillonantoine]

The install script uses a hardcoded path to the lib, can you make sure there is a file there ?

[maurice-jo]

There's not and for some reason I can't install Python3.9 + torch site-packages there....

[maurice-jo]

So digging further. It seems to be an issue with Raspberry Pi 5 and 64-bit Bookworm OS. Bookworm comes with Python 3.11 and it does not let me downgrade to Python 3.9 systemwide, which is why the script cannot access the path (/.local/lib/python3.9/site-packages/torch/) as it does not exist.

I've been trying to compile it using a venv but failed thus far. Is there a possibility to upgrade the nn~ compiler to python3.9?

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On another note, I bought a Pi4 and ran it with legacy raspbian bullseye. I was able to compile the file but whenever I create the object in PureData the program crashes....