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| 00:21.01 | *** topic/#oe is OpenEmbedded Developer Lounge | Web: http://openembedded.org | Repositories: http://git.openembedded.org/ | Primary Repo Mirrors: https://github.com/openembedded | This is not a distro or machine support channel |
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| 07:12.54 | icee | hey ya'll. i'm a maintainer for dRonin... we make a drone autopilot firmware thingy. have a relatively new variant that can run on pi + a hat, plus may have another arm SBC variant soon |
| 07:13.51 | icee | right now we run on raspbian + our own PREEMPT_RT kernel in a deb + our own cross-compiled blob, plus a couple other things (can't use the openocd in raspbian's package repo) |
| 07:14.46 | icee | curious as to what the relative merits are of cross-compiling everything through something like OE. obviously the exposure to raspbian changing something underneath and breaking everything is reduced, and it seems like we might have a nicer blob for users |
| 07:14.56 | icee | but how much suck do we pick up in exchange etc? ;) |
| 07:19.36 | icee | also curious if there's any pain relating to pi-specific loader/devicetree hacks that are in raspbian |
| 07:19.41 | icee | any input people can offer would be greatly appreciated |
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| 09:38.38 | bachp | icee: You will gain a lot more control in the sense that you can tweak every component to your liking. At the same time you gain more complexity as you build everything from scratch and you can't just rely on the binary sources from Debian or Raspian. I haven't used OE with RasPi so I can't comment on that. |
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| 16:40.39 | rburton | icee: there's a meta-raspberrypi BSP layer that is well maintained, so that handles all the rpi-specific crazy for you |
| 16:41.07 | rburton | icee: the advantage of OE in your situation is that you only have to write your images/recipes/config once, and then just changing MACHINE will rebuild it for a different platform with minimal effort for the port |
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| 17:29.39 | icee | rburton: so i don't understand OE well yet. how careful do i need to be with the actual environment I'm building OE in |
| 17:29.53 | icee | i'm thinking about reproducibility -- does OE encaps its own cross environment, or does it use the underlying distro? |
| 17:30.03 | icee | i'm concerned there could be lots of dependencies that I might not capture or capture poorly |
| 17:30.28 | icee | i think i really want to go this way, just want to convince myself i'm not missing something dumb :P |
| 18:03.35 | icee | holy crap bitbake is slick :D |
| 18:04.01 | icee | and i see, kinda inbetween-- looks like it builds all the cross tools with my lcoal build environment-- so the local deps should be .. somewhat minmal |
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| 19:10.43 | icee | <PROTECTED> |
| 19:10.45 | icee | where's the image? :P |
| 19:10.56 | icee | how's the preferred way to start it? :P |
| 19:13.35 | icee | tmp-glibc/deploy/images/qemuarm/ |
| 19:19.48 | icee | ah, found runqemu |
| 19:20.43 | rburton | icee: latest release even isolates you from the host almost entirely by removing /usr from $PATH and linking in the bits you need. |
| 19:22.05 | rburton | local deps are just enough to bootstrap |
| 19:23.34 | icee | woot, i made it work |
| 19:23.35 | icee | :D |
| 19:25.29 | icee | rburton: yah, that bootstrapping thing + parallel package fetching and building was one of the slicker things i've seen in awhile :D |
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| 20:23.51 | icee | so to get the packages in meta-oe, i need to clone it separately and then add a reference to it? |
| 20:25.39 | icee | i want openocd, but it complains it can't find it in core, but it seems to be in meta-oe |
| 20:40.01 | icee | rburton: OK, i'm a bit confused by what meta-oe is. it seems to be an overlapping set of things of what's in oe-core |
| 20:53.44 | kergoth | there's very very little overlap, only what's absolutely necessary. meta-oe is basically the home of recipes for which there isn't a better layer |
| 20:55.51 | icee | OK, thx |
| 20:56.02 | icee | i've got things close to working, though i've not looked at board support yet |
| 20:56.08 | icee | i think i just have one last dumb question i'm stuck on |
| 20:56.14 | icee | how do i increase the default free space in the image? |
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| 22:19.10 | rburton | icee: http://www.yoctoproject.org/docs/latest/ref-manual/ref-manual.html#var-IMAGE_ROOTFS_EXTRA_SPACE |
| 22:19.39 | rburton | icee: oe-core is the core metadata, other layers such as meta-oe add more recipes. start with core and add others as required. |
| 22:35.15 | icee | nice :) |