Experimental jetson support

[SomeoneSerge]

PoC for https://github.com/numtide/nix-gl-host/issues/11 (accidentally, also https://github.com/numtide/nix-gl-host/issues/9, but I don't like my code)

$ nix build -f '<nixpkgs>' --arg 'config' '{ allowUnfree = true; cudaCapabilities = [ "7.2" ]; }' cudaPackages.cuda_compat -o cuda-compat
$ nix shell \
  github:SomeoneSerge/pkgs#pkgsXavier.some-pkgs-py.edm.pythonWith \
  github:SomeoneSerge/nix-gl-host/feat/jetson \
  --command nixglhost -d "$(readlink -f ./cuda_compat/compat)" -d /usr/lib/aarch64-linux-gnu/tegra \
  -- python -m edm.example

[SomeoneSerge]

Actually, I think a better approach would be to just hide the system's libcuda from LD_LIBRARY_PATH. We already link cuda_compat directly in Nixpkgs, we only need to provide its impure dependencies

[picnoir]

Hey! Sorry for the latency.

I don't have any nvidia hardware to test this against currently :( But I think the approach is sound.

On the long run, I envisioned to extract those DSO list from the Python script and move it to a JSON (or any other format) file that users could override on runtime. It doesn't have to happen here, but at least it's written down somewhere :)

As I said on another issue, I sadly don't use this project myself and can't maintain it on the long run. That being said, I know your nickname and I know I can trust you. Would you be interested in getting the commit bit and maintain this project? I'm up to help you during the transition phase.

[SomeoneSerge]

On the long run, I envisioned to extract those DSO list from the Python script and move it to a JSON (or any other format) file that users could override on runtime. It doesn't have to happen here, but at least it's written down somewhere :)

One more direction to ponder is that libnvidia-container maintains a similar list

Would you be interested in getting the commit bit and maintain this project? I'm up to help you during the transition phase.

Thanks! Yes, absolutely. I have some time limitations too, but I'm interested in having this project maintained

[picnoir]

One more direction to ponder is that libnvidia-container maintains a similar list

I did not consider that. Good idea.

Thanks! Yes, absolutely. I have some time limitations too, but I'm interested in having this project maintained

Seems like I'm not admin on this repo. @zimbatm, could you give the commit bit to @SomeoneSerge? (up until we decide to move this project to nix-community).

As I said in the other post, I can't test the Nvidia code, but feel free to ping me on Matrix/IRC if you need a rubberduck, chat about the problem space a bit. I have more context in mind than what I've written down in the docs :)

[zimbatm]

Welcome to the project @SomeoneSerge :)

[SomeoneSerge]

Thanks @zimbatm! I'm planning to look over these changes again soon-ish and then have a more careful look at the repo. So far my thoughts are that we should do something about the glibc we link in Nixpkgs (LD_XXXXXXX_PATH=/usr/lib shouldn't be breaking things), but even then a tool capable of separating the flies from the meat generating a fine-grained LD_LIBRARY_PATH or exporting a /run/opengl-driver/lib in a FHS environment would be valuable