NixOS CUDA - Public Room Timeline

	NixOS CUDA	307 Members
	CUDA packages maintenance and support in nixpkgs \| https://github.com/orgs/NixOS/projects/27/ \| https://nixos.org/manual/nixpkgs/unstable/#cuda	59 Servers

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Sender	Message	Time
26 Mar 2025
	kaya 𖤐 changed their profile picture.	15:33:34
28 Mar 2025
stick	Download Captura de pantalla 2025-03-28 a la(s) 09.50.22.png	08:50:45
stick	we now have CUDA 12.8 in master and number of succeeding jobs is over 1000+ 🎉	08:50:46
Gaétan Lepage	Well done stick!!	08:52:31
mcwitt	I'm running into some trouble linking programs that use dynamic parallelism (CDP) using the Nix CUDA toolchain: the linker fails to find a couple of CDP symbols, e.g. `nvlink error : Undefined reference to '__cudaCDP2GetParameterBufferV2' in '/tmp/tmpxft_002f57e3_00000000-11_test_cdp.o' nvlink error : Undefined reference to '__cudaCDP2LaunchDeviceV2' in '/tmp/tmpxft_002f57e3_00000000-11_test_cdp.o'` I put together a minimal repro here: https://gist.github.com/mcwitt/94b13848ffdf762c587e9bea1257c02b I see some issues have been mentioned in the past, but no resolution was noted: https://github.com/NVIDIA/cuda-samples/issues/264	21:39:15
mcwitt	* I'm running into some trouble linking programs that use dynamic parallelism (CDP) using the NixOS CUDA toolchain: the linker fails to find a couple of CDP symbols, e.g. `nvlink error : Undefined reference to '__cudaCDP2GetParameterBufferV2' in '/tmp/tmpxft_002f57e3_00000000-11_test_cdp.o' nvlink error : Undefined reference to '__cudaCDP2LaunchDeviceV2' in '/tmp/tmpxft_002f57e3_00000000-11_test_cdp.o'` I put together a minimal repro here: https://gist.github.com/mcwitt/94b13848ffdf762c587e9bea1257c02b I see some issues have been mentioned in the past, but no resolution was noted: https://github.com/NVIDIA/cuda-samples/issues/264	21:40:49
	eugeniusz joined the room.	23:33:31
29 Mar 2025
ruro	I think I saw very similar error messages while trying to fix `cuda-samples` and I was able to fix them by explicitly adding a `-L${CUDA_PATH}/lib` to the `nvcc` invocation, where `CUDA_PATH` is a `symlinkJoin` with a bunch of cuda libs (not 100% sure, which specific ones were needed for the `__cudaCDP2*` symbols, maybe `cuda_cudart` or `cuda_cudart.static`?).	07:26:15
1 Apr 2025
	Artem Andreenko joined the room.	09:58:12
	Adam Neverwas set a profile picture.	23:15:44
2 Apr 2025
	@athyfr:matrix.org joined the room.	01:29:37
3 Apr 2025
	theabm joined the room.	12:00:11
5 Apr 2025
	@tinybronca:sibnsk.net left the room.	15:47:02

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