what source code can build yocto image for rock 4c+ , I am following a guide(readme) in branch scarthgap page , but many errors happened!

[gitgonewithwind]

Hi all,
Sorry to bother you.
my company wants to use rock 4c+ and rock 5c board. I am build rock 4c+ first.
I am following the guide here: https://docs.radxa.com/en/rock5/rock5c/other-os/yocto and then here https://github.com/radxa/meta-rockchip/tree/scarthgap page for scarthgap branch. I downloaded the source code following the below guide:

~ $ mkdir yocto; cd yocto
~/yocto $ git clone git://git.openembedded.org/bitbake -b master
~/yocto $ git clone git://git.openembedded.org/openembedded-core -b scarthgap
~/yocto $ git clone git://git.yoctoproject.org/meta-arm -b scarthgap
~/yocto $ git clone git://git.openembedded.org/meta-openembedded -b scarthgap
~/yocto $ git clone git@github.com:radxa/meta-rockchip.git -b scarthgap
~/yocto $ git clone git://git.yoctoproject.org/meta-virtualization -b scarthgap

and build the rock 4c+ image, but there are a lot of similar errors happened:

ERROR: ExpansionError during parsing /home/yocto/yocto/source/layers/meta-openembedded/meta-oe/recipes-connectivity/usbmuxd/usbmuxd_git.bb bb.data_smart.ExpansionError: Failure expanding variable GITPKGVTAG, expression was ${@get_git_pkgv(d, True)} which triggered exception AttributeError: 'FetchData' object has no attribute 'revisions' The variable dependency chain for the failure is: GITPKGVTAG -> PKGV ERROR: Parsing halted due to errors, see error messages above

the chatgpt said: You’re using a newer BitBake / Yocto branch (e.g. Scarthgap) with an older layer (like meta-openembedded from Mickledore or older).

but I followed the guide I exactly use git clone git://git.openembedded.org/meta-openembedded -b scarthgap
and I modified the .bb file. I can pass the scanning. after that there are a lots of similar error happened .I can NOT all of them.
so I think I am using wrong source code.
my question is:

Q1, where is the correct source code for rock 4c+( and rock 5c)?
Q2: Do I need switch to master branch https://github.com/radxa/meta-rockchip (scarthgap-vendor) page following the readme guide ?
Dependencies
This layer depends on:

URI: git://git.yoctoproject.org/poky

branch: scarthgap

URI: git://git.openembedded.org/meta-openembedded

layers: meta-oe

branch: scarthgap

(I use poky in raspberry pi before ,not same as https://github.com/radxa/meta-rockchip/tree/scarthgap page)

Thank you so much.

I am looking forward someone reply to me soon.

[kinchims]

the error is due to https://lists.yoctoproject.org/g/yocto/topic/failure_expanding_variable/111809199

see -> https://lore.kernel.org/openembedded-devel/20250319164511.832211-1-richard.purdie@linuxfoundation.org/T/#u

to fix it you need to use branch v2.8 of the bitbake repository which seems to be before that breaking change happened.

[gitgonewithwind]

got it. thanks. I directly used poky and the master branch readme as guide. I can built it well.