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Building LineageOS 18.1 for device that only supports 19.1

 2 years ago
source link: https://forum.xda-developers.com/t/building-lineageos-18-1-for-device-that-only-supports-19-1.4521573/#post-87759027
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Building LineageOS 18.1 for device that only supports 19.1

ipilcher

Senior Member

I desperately need to get my work profile working on my new OnePlus Nord N200 5G (dre), and I've just discovered that it is apparently impossible to create a new work profile on LineageOS 19.1. It seems, however, that a work profile set up on 18.1 will continue to work after a dirty flash to 19.1. Thus, I'm hoping that I can install 18.1 on my device, setup of the work profile, and immediately dirty flash 19.1. I won't really need a fully functional build of 18.1; just something that will boot up and allow me to create the work profile before I dirty-flash 19.1.

In order to do this, I need to build LineageOS 18.1 for this device. Unfortunately, only 19.1 has ever been supported.

I have a build environment that is currently building 19.1, just as a test. I also have the most recent Android 11 vendor firmware, from which I should be able to extract any required proprietary files.

I'm really missing 2 things:

  1. The list of proprietary files that I should extract from the vendor's firmware. (I have the 19.1 list, but I assume that it won't work.)
  2. What other files do I need to create/edit to add the device to the 18.1 build tree.

Is there a guide somewhere that walks through the process?


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