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Embedded Linux without Yocto (programming.dev)

submitted 3 months ago* (last edited 3 months ago) by [email protected] to c/[email protected]

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Hello all, I'm an embedded software guy struggling with Yocto. I'm not asking for assistance as I cannot be saved. Rather, I'd like to make my own. How hard it would be to put a Linux distro onto a device without it? For example, if I were to get a perfectly good distro (let's just say Debian) with the right architecture going in a container. Is there a simple way to combine that with u-Boot, and other crap from a SoC manufacturer to build an image? If that is oversimplifying, I've done Linux from scratch before, and I'd be willing to go that route as well. I guess the issue boils down to the specifics like building the image and anything else that I'm not aware of.

So, what part of this idea is going to be a lot harder than I'm giving it credit for?

By the way, I'm aware of Buildroot. This is more for learning purposes, and who knows... maybe I will actually make something out of it.

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[–] [email protected] 0 points 3 months ago

Yeah I tried Buildroot and Yocto and got frustrated. Buildroot did work, but it does a ton of stuff with a ton of not-very-well-documented options, and it definitely wasn't integrated into a proper build system. Like there's no way I'd trust any kind of incremental build.

I ended up doing it myself. Tbf I was just benchmarking kernel boots so I didn't need userspace or even real hardware. I only needed OpenSBI (a RISC-V firmware thing) and the kernel.

Frankly OpenSBI is a rather undocumented mess too. Incremental OpenSBI builds don't work, and I did try and contribute fixes but despite the repo being on GitHub they auto-close PRs and tell you to use git send email from the command line to a mailing list like it's the 90s. I shit you not. How to keep away contributors.

Anyway my conclusion is that the whole Linux OS building story is a shit show. If you only want a basic image with busybox etc. you can probably do it yourself and then you will actually understand it, but you will just be recreating Buildroot.