Build instructions

[randxor]

We need build instructions in order for people to more easily make custom roms. Currently most roms here only provide a repo or two, hardly describing the build process if anything. Not sure if those repos contain all the sources/blobs you need either.

It's not that hard to build and you can always go on th cheap and hire a cloud vps for a few hours, so don't bother with local building unless you have the powerful hardware.

Anyhow, so far what I know is that some people just replace the kernel and firmware, it seems this is called repacking.
Others are building Lineage from source as per their instructions, which are not descriptive when you're porting to a new device.

We need concrete and concise information about how it's done.

 

[Gabronog]

Lineage wiki is pretty accurate and if someone ask here I can try to solve his doubt.
I am not the best developer but I know the basics xD

 

[randxor]

Can you describe the basic workflow?
Which repos to check out, what build scripts are there, how to combine them. Basically a short tutorial on stuff. Also how come you're using 821 kernel from zl1, i know 820 and 821 are alike, but when do you patch the kernel to work for 820, i read that you need some config changes and a different gpu blob.

I am a developer myself, but not an android rom one. Things look really fragmented and chaotic. Besides Lineage wiki, I haven't found anything that resembles docs. I really want to contribute on this and have the hardware to build, just need some info on where to begin.

Thanks for taking your time to reply.

 

[Gabronog]

Can you describe the basic workflow?
Which repos to check out, what build scripts are there, how to combine them. Basically a short tutorial on stuff. Also how come you're using 821 kernel from zl1, i know 820 and 821 are alike, but when do you patch the kernel to work for 820, i read that you need some config changes and a different gpu blob.

I am a developer myself, but not an android rom one. Things look really fragmented and chaotic. Besides Lineage wiki, I haven't found anything that resembles docs. I really want to contribute on this and have the hardware to build, just need some info on where to begin.

Thanks for taking your time to reply.

Thats thanks to codeworkx code. Basically you compile a rom for zl1 and works for zl0.
My workflow is
repo init/sync the rom
Fix libhidl and libbfquio if needed (Dont know why they fix an error creating a bigger one tho)
Take the device tree, vendor and kernel
Adapt the device tree for the rom (Like in cosmic where config is in root not in config folder, boardconfig...)
And just brunch or make or lunch depends on rom xD

Edit: Forgot u need like 200 frameworks/av commits to make zoom work https://github.com/mosimchah/frameworks_av/commits/o8.1 all the january 15th and this one http://gerrit.aicp-rom.com/#/c/54436/

 

[randxor]

You init the Lineage repos?
What are those libhidl and libfquio about, and how do you fix them?
Vendor is the firmware blobs?
Kernel is obvious
What is a device tree? And how it relates to the kernel?
How did you adapt it to the device?

Different devices have different partion layouts I assume. How do you make the zl1 rom work for both zl0 and zl1? Earlier people were reporting bricks because of flashing roms for zl1 on zl0

 

[Gabronog]

You init the Lineage repos?
What are those libhidl and libfquio about, and how do you fix them?
Vendor is the firmware blobs?
Kernel is obvious
What is a device tree? And how it relates to the kernel?
How did you adapt it to the device?
Different devices have different partion layouts I assume. How do you make the zl1 rom work for both zl0 and zl1? Earlier people were reporting bricks because of flashing roms for zl1 on zl0

Yout init the rom source you want to compile
You dont need to adapt anything codeworkx already did it for us we just compile zl1 roms with his device tree (Los one) or any of the forked ones (Like Aicp which I recommend).
Libhidl and libbfquio depends on the rom you are building. Libhidl is solved by reverting this changes https://github.com/PixelExperience/system_libhidl/commit/607e961b85eea8969503d8ff8437c014f04f0ca2 and libbfquio by taking this http://gerrit.aicp-rom.com/#/c/56488/
You dont adapt device tree to device you adapt it to the rom you are compiling see how other devs do it in their github (Every rom is different for example in cosmic you rename lineage/aicp.mk to cos.mk and change where to import things)

---------- Post added at 01:53 PM ---------- Previous post was at 01:49 PM ----------

Start by picking up a rom you want to compile that has 8.1 source working and better if a msm8996 device is there (zuk z2, oneplus 3...)

 

[randxor]

Thanks for the info. Will experiment a bit when I have free time. Planning on making an in-depth guide if I succeed and clarify the concepts.

Btw I see that everyone is using kernel 3.18.20, why can't we get a newer kernel? If we have the sources for it and the blobs? Is the reason being that the drivers are not in the mainline kernel so they need to be ported to a newer kernel?

 

[Gabronog]

Thanks for the info. Will experiment a bit when I have free time. Planning on making an in-depth guide if I succeed and clarify the concepts.

Btw I see that everyone is using kernel 3.18.20, why can't we get a newer kernel? If we have the sources for it and the blobs? Is the reason being that the drivers are not in the mainline kernel so they need to be ported to a newer kernel?

Np
Not sure dont know much about android kernels