参考：讯为

1、文件系统

不同的文件系统组成了：debian、ubuntu、buildroot、qt等系统
每个文件系统的uboot和kernel是一样的

2、源码目录介绍

目录

3、正式编译

编译脚本build.sh
帮助内容如下：

Available options:
uboot                   -build uboot
kernel                  -build kernel
modules                 -build kernel modules
rootfs                  -build rootfs (default is buildroot)
buildroot               -build buildroot rootfs
yocto                   -build yocto rootfs
debian10                -build debian10 rootfs
debian11                -build debian11 rootfs
ubuntu20                -build ubuntu20 rootfs
ubuntu22                -build ubuntu22 rootfs
recovery                -build recovery
all                     -build uboot, kernel, rootfs, recovery image
buildroot_update        -build uboot, kernel, buildroot, recovery updateimg
debian10_update         -build uboot, kernel, debian10, recovery updateimg
debian11_update         -build uboot, kernel, debian11, recovery updateimg
ubuntu20_update         -build uboot, kernel, ubuntu20, recovery updateimg
ubuntu22_update         -build uboot, kernel, ubuntu22, recovery updateimg
cleanall                -clean uboot, kernel, rootfs, recovery
firmware                -pack all the image we need to boot up system
updateimg               -pack update image
save                    -save images, patches, commands used to debug
allsave                 -build all & firmware & updateimg & save
info                    -see the current board building information

通过export 命令设置要编译的系统，
依次执行：

• build.sh -all
• build.sh firmware
• build.sh updateimg

4、单独编译u-boot

build.sh -uboot
修改u-boot进行个性化配置：

rk356x_linux/u-boot$ export ARCH=arm64
rk356x_linux/u-boot$ make menuconfig

未完待续