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LG-V30

A/B (Seamless) System Updates

Partitions and Images

LG OpenSource Code Distribution

Implementing A/B Updates

gpt.ini

How A/B Partitions and Seamless Updates Affect Custom Development on XDA

Bring up Android A/B system (Part 1)

Quote:

  1. Android build

  • Download original android source code ( android-7.1.2_r4 ) from http://source.android.com ( $repo init -u https://android.googlesource.com/platform/manifest -b android-7.1.2_r4 $repo sync -cdq -j12 --no-tags $repo start android-7.1.2_r4 --all )

  • Untar opensource packages of LGH930_Nougat_Android.tar.gz into downloaded android source directory a) tar -xvzf LGH930_Nougat_Android.tar.gz

  • And, merge the source into the android source code

  • Run following scripts to build android a) source build/envsetup.sh b) lunch 1 c) make -j4

  • When you compile the android source code, you have to add google original prebuilt source(toolchain) into the android directory.

  • After build, you can find output at out/target/product/generic

  1. Kernel Build

  • Uncompress using following command at the android directory a) tar -xvzf LGH930_Nougat_Kernel.tar.gz

  • When you compile the kernel source code, you have to add google original "prebuilt" source(toolchain) into the android directory.

  • Run following scripts to build kernel

a) cd kernel/msm-4.4 b) mkdir -p out c) make ARCH=arm64 O=./out joan_global_com_defconfig d) make ARCH=arm64 O=./out CROSS_COMPILE=$(pwd)/../../prebuilts/gcc/linux-x86/aarch64/aarch64-linux-android-4.9/bin/aarch64-linux-android- KERNEL_COMPRESSION_SUFFIX=gz -j4

  • "-j4" : The number, 4, is the number of multiple jobs to be invoked simultaneously.
  • After build, you can find the build image(Image.gz) at out/arch/arm64/boot

https://forum.xda-developers.com/lg-v30/development/unofficial-lineageos-14-1-t3740480

mkdir -p out

make O=out clean

make O=out mrproper

make ARCH=arm64 O=./out joan_global_com_defconfig

make ARCH=arm64 O=./out KERNEL_COMPRESSION_SUFFIX=gz -j$(nproc --all)

make ARCH=arm64 O=./out CROSS_COMPILE=$(pwd)/../../../../../toolchain/aarch64-linux-android-4.9/bin/aarch64-linux-android- KERNEL_COMPRESSION_SUFFIX=gz -j$(nproc --all)

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