!ayCRiZriCVtuCUpeLp:nixos.org

Nix Cross Compiling

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3 Feb 2026
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9 Feb 2026
@stas:mainframe.lvStasI want to try building nixos for BE PowerPC G5. Any issues with that cpu arch anyone is aware of? 10:10:29
@stas:mainframe.lvStasI have a 16GB RAM Power Mac G5, and have a working cross compiled nixos setup for armv7. Thinking of modifying it to try build an install media for G510:12:20
@k900:0upti.meK900 @Puna ^ 10:13:16
@stas:mainframe.lvStasI know I will have problems with browsers and so on later on, but I want to see how much of a desktop it can get. :D10:20:31
@stas:mainframe.lvStasAlready learned about two ABI versions the arch has, mostly soaking up the knowledge from Gentoo wiki on it10:33:03
@grimmauld:m.grimmauld.deGrimmauld (any/all) fwiw servo is pretty okay on exotics if rust supports those platforms, and rust platform support is okayish, after all its part of the linux kernel now 10:56:46
@grimmauld:m.grimmauld.deGrimmauld (any/all) so if you want a browser, try servo 10:57:03
@stas:mainframe.lvStasThanks for the tip! It is cool hardware, even the insides look more like IBM than apple made11:02:16
@stas:mainframe.lvStasTook Chinese RAM sticks like a champ11:03:34
@opna2608:matrix.orgPuna installer module needs some changes for the ISO to get properly picked up by the system. i can push a WIP PR for that later today. (it's CHRP-ish, with the usual Apple nonesense attached to it) 11:26:38
@stas:mainframe.lvStasWow! You actually did it already :D11:27:27
@stas:mainframe.lvStasI sometimes interact with PowerVM gear at work, and hope to get one at home once we discontinue AIX.11:28:23
@stas:mainframe.lvStaskust the obscurity of it makes it fun11:28:34
@stas:mainframe.lvStas* just the obscurity of it makes it fun11:28:38
@stas:mainframe.lvStasAFAIK, it needs to blessed with the right flags, and be HFS for boot from OF to work11:29:18
@opna2608:matrix.orgPuna i also haven't tried building the image cross, or actually installing nixos yet. just building nix stuff on debian natively and booting into the installer to test results. i think you'll need mac-fdisk or pdisk to get your disk formatted in APM format, and hfsutils to create the HFS boot partition and bless stuff on it. 11:29:26
@opna2608:matrix.orgPuna fix for building pdisk: https://github.com/NixOS/nixpkgs/pull/488404
hfsutils: https://github.com/NixOS/nixpkgs/pull/488494
11:29:49
@opna2608:matrix.orgPuna rust cross that involves bindgen (i.e. mesa, but other stuff too) is borked because the target triplet fixes don't get passed through: https://github.com/NixOS/nixpkgs/issues/473862
not sure if that'll affect building an iso cross though.
11:34:48
@stas:mainframe.lvStasthank you! I will try it out over the next weekend. I can also always bootstrap from an existing Linux distro if I have to11:35:00
@k900:0upti.meK900 It does 11:35:37

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