WLS2Linux 子系统编译 Linux
上一篇文章中讲解 WSL2Linux 子系统的编译 Openwrt。有轻便子系统还可以再编译 buildroot，或者 Unbntu Debian 等 Linux 系统的 BSP(Board support package)；再折腾个 rootfs,拼凑起来就是一个完成的 Ubuntu 或者 Debian 系统终端机。
提示：WSL2Linux 编译 rk3288 buildroot 源码。
1. 编译准备
1.1 获取 uboot kernel 源码
如果有 buildroot 完整代码，可直接用 repo 下载全部；获取源码和工具步骤可以跳过。
a) uboot 源码 由原厂 rkbin u-boot 共同组成
cd ~/inux
git clone https://github.com/rockchip-linux/rkbin.git #获取 rkbin
git clone https://github.com/rockchip-linux/u-boot.git #获取 uboot
b) kernel 源码
cd ~/inux
git clone https://github.com/rockchip-linux/kernel.git
c) 交叉编译工具链和下载工具 需借用buildroot的相关文件
# prebuilts/gcc/linux-x86/aarch64/
cd buildroot
cp -rf prebuilts/gcc/linux-x86/aarch64/gcc-linaro-6.3.1-2017.05-x86_64_aarch64-linux-gnu/ --parents ~/linux
# prebuilts/gcc/linux-x86/arm/
cp -rf prebuilts/gcc/linux-x86/arm/gcc-linaro-6.3.1-2017.05-x86_64_arm-linux-gnueabihf/ --parents ~/linux
# linux 系统中升级工具
cp -rf tools/linux/Linux_Upgrade_Tool/Linux_Upgrade_Tool --parents ~/linux
cp rkflash.sh ~/linux
# linux 系统打包工具
cp -rf tools/linux/Linux_Pack_Firmware/rockdev/ --parents ~/linux
# windows
tools/windows/RKDevTool #下载工具
tools/windows/DriverAssitant_v5.0.zip #驱动包 下载前需安装
提示：下载或解包源码时，请勿使用 root 权限操作。
1.2 编译依赖包安装
a) uboot 编译依赖包
安装 uboot 编译依赖包
sudo apt-get install gcc make device-tree-compiler gawk
如不安装编译需要依赖包,报错提示以及相关提示命令
Command 'make' not found, but can be installed with:
sudo apt install make # version 4.2.1-1.2, or
sudo apt install make-guile # version 4.2.1-1.2
手动安装 make
sudo apt install make
gcc -DCURSES_LOC="<curses.h>" -DLOCALE -DKBUILD_NO_NLS -I/home/fish/356x-linux/buildroot/output/rockchip_rk3568/build/buildroot-config -DCONFIG_=\"\" -c conf.c -o /home/fish/356x-linux/buildroot/output/rockchip_rk3568/build/buildroot-config/conf.o
/bin/sh: 1: gcc: not found
手动安装 gcc
sudo apt install gcc
ERROR: No 'dtc', please: apt-get install device-tree-compiler
ERROR: Running build_uboot failed!
ERROR: exit code 1 from line 515:
./make.sh $RK_UBOOT_DEFCONFIG $UBOOT_COMPILE_COMMANDS
手动安装 device-tree-compiler
sudo apt install device-tree-compiler
awk 命令缺失
awk: line 2: function strtonum never defined
$sudo apt install gwak
b) kernel 编译依赖包
单次安装
sudo apt install gcc make bison cpio flex openssl libssl-dev liblz4-tool -y
如有遗漏或者未安装错误提示
/bin/sh: 1: bison: not found
make[1]: *** [scripts/Makefile.lib:196: scripts/kconfig/zconf.tab.c] Error 127
make: *** [Makefile:578: rockchip_linux_defconfig] Error 2
ERROR: Running build_kernel failed!
ERROR: exit code 2 from line 573:
make ARCH=$RK_ARCH $RK_KERNEL_DEFCONFIG $RK_KERNEL_DEFCONFIG_FRAGMENT
手动安装 bision
$ sudo apt install bison
/bin/sh: 1: flex: not found
make[1]: *** [scripts/Makefile.lib:188: scripts/kconfig/zconf.lex.c] Error 127
make: *** [Makefile:578: rockchip_linux_defconfig] Error 2
ERROR: Running build_kernel failed!
ERROR: exit code 2 from line 573:
make ARCH=$RK_ARCH $RK_KERNEL_DEFCONFIG $RK_KERNEL_DEFCONFIG_FRAGMENT
手动安装 flex
sudo apt install flex -y
scripts/extract-cert.c:21:10: fatal error: openssl/bio.h: No such file or directory
21 | #include <openssl/bio.h>
手动安装 libssl-dev
sudo apt install libssl-dev
/bin/sh: 1: lz4c: not found
make[1]: *** [arch/arm64/boot/Makefile:31：arch/arm64/boot/Image.lz4] 错误 1
make: *** [arch/arm64/Makefile:139：Image.lz4] 错误 2
手动安装 lz4c
sudo apt install liblz4-tool -y
c) 编译 recovery
单次安装依赖工具
sudo apt install expect g++ -y
如有遗漏或者未安装错误提示
====Start build rockchip_rk356x_recovery====
you need to install 'unbuffer' (from package expect or expect-dev)
log saved on /home/skysi/rk3566-xf8/br.log
====Build rockchip_rk356x_recovery failed!====
tail: cannot open '/home/skysi/rk3566-xf8/br.log' for reading: No such file or directory
Command exited with non-zero status 1
you take 0:04.91 to build recovery
ERROR: Running build_recovery failed!
ERROR: exit code 1 from line 858:
/usr/bin/time -f "you take %E to build recovery" $COMMON_DIR/mk-ramdisk.sh recovery.img $RK_CFG_RECOVERY
手动安装 expect
sudo apt install expect -y
2023-04-23T12:31:29 make[2]: g++: Command not found
$ sudo apt install g++
d) 编译 rootfs
单次安装依赖环境变量
sudo apt install fakeroot unbuffer expect unzip -y
如有遗漏或者未安装错误提示
pack image tools
processing option: firmware
Install fakeroot First.
sudo apt-get install fakeroot
ERROR: Running build_firmware failed!
ERROR: exit code 255 from line 949:
./mkfirmware.sh $BOARD_CONFIG
手动安装 fakeroot
sudo apt install fakeroot -y
make: Leaving directory '/home/fish/356x-linux/buildroot'
you need to install 'unbuffer' (from package expect or expect-dev)
log saved on /home/fish/356x-linux/br.log
tail: cannot open '/home/fish/356x-linux/br.log' for reading: No such file or directory
Command exited with non-zero status 1
you take 0:02.53 to build builroot
ERROR: Running build_buildroot failed!
ERROR: exit code 1 from line 628:
/usr/bin/time -f "you take %E to build builroot" $COMMON_DIR/mk-buildroot.sh $BOARD_CONFIG
$ unbuffer
Command 'unbuffer' not found, but can be installed with:
sudo apt install expect
手动安装 unbuffer
$ sudo apt install expect unbuffer -y
2022-05-30T14:14:11 You must install 'unzip' on your build machine
手动安装 unbuffer
sudo apt install unzip
e) 安装python环境变量
/bin/bash: 行 1: python: 未找到命令
sudo apt install python2
cd /usr/bin
sudo ln -s python2.7 python
2. 编译源码
2.1 uboot
编译 uboot 和 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 编译 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 刷机
2.3.1 映射刚刚生成的镜像文件以及分区表
mdkir rockdev
cd rockdev
ln -s ../u-boot/rk3288_loader_v1.09.258.bin MiniLoaderAll.bin
ln -s ../u-boot/uboot.img uboot.img
ln -s ../kernel/zboot.img uboot.img
# buildroot
ln -s ../device/rockchip/rk3288/parameter.txt parameter.txt
# github 获取 uboot和kernel
cp /build/buildroot/device/rockchip/rk3288/parameter.txt ./parameter.txt
2.3.2 刷机
刷机过程可先刷 uboot，正常运行后再刷 boot；待内核正常运行后再刷文件系统；文件系统正常运行后终端设备则正常变身终端机。
Linux 刷机借助 rkflash.sh 脚本
# 刷loader
./rkflash.sh loader
# 刷分区表
./rkflash.sh parameter
./rkflash.sh uboot
./rkflash.sh boot
# 刷文件系统时 需手动映射或者拷贝 rootfs 到 rockdev 目录
./rkflash.sh rootfs
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。
2.4 升级后以前驱动无法加载
错误提示：
wlan_mt7668_sdio: version magic '4.19.193 SMP mod_unload aarch64' should be '5.10.66 SMP mod_unload aarch64'
此问题因当前系统内核与升级前版本差异，致使驱动无法加载。此问题解决方法：刷机到 4.19.193 版本内核。
总结
WSL2 子系统终究是子系统，编译 uboot kernel openwrt 还可以胜任；如果编译 Android 和 Linux rootfs 则受系统和 CPU 限制，建议使用 Ubuntu PC或者服务器。
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