Add support for build hosts with custom-built kernels, e.g. WSL2

[timblaktu]

Building and running the 22.04 dev container from the variscite container project failed to find my kernel headers:

E: Unable to locate package linux-headers-5.15.153.1-microsoft-standard-WSL2
E: Couldn't find any package by glob 'linux-headers-5.15.153.1-microsoft-standard-WSL2'

I had built and installed a custom WSL kernel from source (to upgrade to 6.x and to add support for automatically mounting usb mass storage devices), so there is no Ubuntu package.

In my fork I intend to modify the scripts here to check for locally-available kernel headers before installing them with apt.

My "build host" is an Ubuntu 22.04.4 LTS VM with 5.15.153.1-microsoft-standard-WSL2 kernel in wsl2 on win11 on x86_64 thinkpad.

[nsdrude]

Which Variscite release are you trying to build with the container?

[timblaktu]

@nsdrude what exactly do you mean by "Variscite release"?

I originally reproduced this error from master branch of this repo, and have since forked and branched off master to work on a fix. Just getting back to this now..

[timblaktu]

It appears the error in the OP was caused by my no installing modules along with headers when I installed my locally-build WSL kernel. So, there's no code to fix here, but I'll still submit a PR with minor change in the README to raise awareness about this use case and provide a little reminder.

[timblaktu]

#7

[nsdrude]

@nsdrude what exactly do you mean by "Variscite release"?

@timblaktu Which Variscite SOM are you using, and which Variscite software release are you trying to build using the docker container?

After clicking on one of our SOMs here, you are presented with all the available software releases: https://variwiki.com/

[timblaktu]

SOM: VAR-SOM-MX8M-PLUS V1.2

Re: SW release, I have used HEAD of mickledore branch as well as refs/tags/mx8mp-yocto-mickledore-6.1.36_2.1.0-v1.2.

I will file another issue for discussing the build problem I'm having now, since this issue is essentially about a documentation change. (I tagged you on the PR, BTW.)

EDIT: Here is the new issue for the docker build layer error: #8