下载

https://buildroot.org/

不要使用root账户

#创建一个新账户
useradd -m builder
#使用root账户给builder用户分配解压的buildroot文件夹权限
chown -R builder:builder /home/builder/buildroot
#后面再使用builder用户
su builder

配置Target options

Target options
        -> Target Architecture = ARM (little endian)
        -> Target Binary Format = ELF
        -> Target Architecture Variant = cortex-A7
        -> Target ABI = EABIhf
        -> Floating point strategy = NEON/VFPv4
        -> ARM instruction set = ARM

配置Toolchain

Toolchain
   -> Toolchain type = External toolchain
   -> Toolchain = Custom toolchain //选择用户的交叉编译器
   -> Toolchain origin = Pre-installed toolchain
   -> Toolchain path =/root/gcc-linaro-6.5.0-2019.12-x86_64_arm-linux-gnueabihf //交叉编译器路径
   -> Toolchain prefix = arm-linux-gnueabihf //前缀
   -> External toolchain gcc version = 6.x
   -> External toolchain kernel headers series = 5.10.x
   -> External toolchain C library = glibc/eglibc
   -> [*] Toolchain has SSP support? (NEW) //选中
   -> [*] Toolchain has RPC support? (NEW) //选中
   -> [*] Toolchain has C++ support? //选中
   -> [*] Enable MMU support (NEW) //选中

配置System configuration

System configuration
   -> System hostname = Embedfire_imx6ull //平台名字
   -> System banner = Welcome to embedfire i.mx6ull //欢迎语
   -> Init system = BusyBox //使用 busybox
   -> /dev management = Dynamic using devtmpfs + mdev //使用 mdev
   -> [*] Enable root login with password (NEW) //使能登录密码
   -> Root password = root //登录密码为 root

配置Filesystem images

-> Filesystem images
   -> [*] ext2/3/4 root filesystem //如果是 EMMC 或 SD 卡的话就用 ext3/ext4
      -> ext2/3/4 variant = ext4 //选择 ext4 格式
-> [*] ubi image containing an ubifs root filesystem //如果使用 NAND 的话就用 ubifs

关闭kernel和uboot的编译(默认关闭)

-> Kernel
-> [ ] Linux Kernel //取消 Linux Kernel 选项！

-> Bootloaders
-> [ ] U-Boot //取消 U-Boot 选项！

执行编译

make