WLS2Linux subsystem compiles Android

In the previous article, I explained "WLS2Linux Subsystem Migration/Restore", migrating from C drive to D drive. It can not only prevent the C disk from becoming popular, but also free up disk space. Having a larger storage space means that there is a lot to do, such as compiling the Android system. This article takes the open source firefly Android10 code as an example to briefly explain the compilation process.

提示：Compilation environment dependencies are missing, please refer to "WLS2Linux Subsystem (3)" .

1. Preparation for compilation

1.1 Get the Android source code

注意：下载或解包源码时，请勿使用 root 权限操作。
You can go to the official website of firefly to pick up the SDK, download it to the local decompression, and then it will be a git mirror warehouse.

# 还原源码
git checkout .

1.2 Compile dependency package installation

a) uboot compilation dependencies

Install the uboot compilation dependency package.

sudo apt-get install gcc make device-tree-compiler gawk

If you do not install and compile, you need to rely on packages, error messages and related prompts, please refer to "WLS2Linux Subsystem (3)" .

b) kernel compilation dependencies

Install the kenrel compilation dependency package.

sudo apt install gcc make bison cpio flex openssl libssl-dev liblz4-tool -y

If there are omissions or error prompts that are not installed, please refer to "WLS2Linux Subsystem (3)" .

c) Compile the recovery dependency package

Install the recovery compilation dependency package.

sudo apt install expect g++ -y

If there are omissions or error prompts that are not installed, please refer to "WLS2Linux Subsystem (3)" .

d) Compile the Android dependency package

Install Android compilation dependencies.

sudo apt install fakeroot unbuffer expect unzip libncurses5 libncurses5-dev -y

If there are omissions or error prompts that are not installed, please refer to "WLS2Linux Subsystem (3)" .
The error message is as follows, curses5 needs to be installed.

curses.h: No such file or directory

Install curses5.

sudo apt-get install libncurses5 libncurses5-dev

e) Install python environment variables

/bin/bash: 行 1: python: 未找到命令

The compilation in the Android source code depends on the python2 environment,

sudo apt install python2
cd /usr/bin
sudo ln -s python2.7 python

2. Compile the source code

2.1 uboot

Compile uboot and MiniLoader.bin

cd ~/linux/u-boot
# 编译 rk3568
./make.sh rk3568
# 编译 rk3288
./make.sh rk3288
......
 load addr is 0x8400000!
pack input bin/rk32/rk3288_tee_ta_v2.01.bin 
pack file size: 734592(717 KB)
crc = 0x69d0e887
trustos version: Trust os
pack ./trust.img success! 
pack trust okay! Input: /home/fish/linux/rkbin/RKTRUST/RK3288TOS.ini

/home/fish/linux/u-boot
pack loader ok.(rk3288_loader_v1.09.263.bin)(0.02)
pack loader okay! Input: /home/fish/linux/rkbin/RKBOOT/RK3288MINIALL.ini

# 编译完成后生成 uboot.img 和 rk3288_loader_v1.09.263.bin

2.2 compile kernel

cd ~/linux/kernel
# 编译 rk3568 为 64bit A55,可选用 aarch64
make ARCH=arm rockchip_linux_defconfig -j4
make ARCH=arm rk3568-evb2-lp4x-v10.img -j16
# 编译 rk3288 为 32bit A17, 须使用 arm
make ARCH=arm rockchip_linux_defconfig -j4
make ARCH=arm rk3288-evb-rk808-linux.img -j16
......
 LD [M]  drivers/net/wireless/marvell/mwifiex/mwifiex_sdio.ko
  LD [M]  drivers/net/wireless/rockchip_wlan/rkwifi/bcmdhd/bcmdhd.ko
  LD [M]  drivers/net/wireless/marvell/mwifiex/mwifiex.ko
  Image:  resource.img (with rk3288-evb-rk808-linux.dtb logo.bmp logo_kernel.bmp) is ready
  Image:  boot.img (with Image  resource.img) is ready
  Image:  zboot.img (with zImage  resource.img) is ready

#编译完成后生成 4个镜像文件
# boot.img ---> 内核完整镜像
# kernel.img ---> 内核
# resource.img ---> logo 和 dtb
# zboot.img --> 最小内核

2.3 Compile Android

Configure environment variables

source build/envsetup.sh
lunch rk3568_r-userdebug

compile android

# 一键编译 uboot kernel Android
./build.sh -UKAu
# 编译完成自动生成刷机镜像，漫长等待过程，此处省略N小时

2.4 Flash

2.4.1 View image files and partition tables

ls rockdev/rk3568_r/
baseparameter.img  boot.img    dtbo.img  MiniLoaderAll.bin  parameter.txt        pcba_whole_misc.img  resource.img  uboot.img   vbmeta.img
boot-debug.img     config.cfg  logo.img  misc.img           pcba_small_misc.img  recovery.img         super.img     update.img

2.4.2 Flashing

You can use the flashing tool to flash the upgrade package, or use the rkflash.sh script for Linux flashing

# 刷 升级包
./rkflash.sh updateimg

WSL2 子系统无法执行 mount 和 chroot 命令，故需要拷贝到 Windows 目录，使用相关工具刷机。

2.5 The previous driver could not be loaded after the upgrade

Error message:

wlan_mt7668_sdio: version magic '4.19.193 SMP mod_unload aarch64' should be '5.10.66 SMP mod_unload aarch64'

Due to the difference between the current system kernel and the version before the upgrade, the driver cannot be loaded. The solution to this problem: flash to the 4.19.193 version of the kernel.

Tips

If the computer memory used is less than 24G, compilation errors may be reported due to insufficient memory. Please refer to "https://blog.csdn.net/weixin_35723192/article/details/132008500" .
If the compilation tools are not fully installed, a compilation error will also be prompted.

Summarize

The WSL2 subsystem is a subsystem after all, compiling uboot kernel openwrt is also competent; if compiling Android and Linux rootfs is limited by the system and CPU, it is recommended to use Ubuntu PC or server.

WSL2Linux subsystem (5)