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buildroot使用笔记.md

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buildroot 笔记

buildroot的编译

  • 操作流程
  1. 解压 buildroot 压缩包
  2. make menuconfig
    1. 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
    1. 配置 Toolchain
        Toolchain
    -> Toolchain type = External toolchain
    -> Toolchain = Custom toolchain                     /用户自己的交叉编译器
    -> Toolchain origin = Pre-installed toolchain       //预装的编译器
    -> Toolchain path =/usr/local/arm/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf   //自己编译器的路径
    -> Toolchain prefix = $(ARCH)-linux-gnueabihf       //前缀 !!!!!!!!!!!!!!!!!!!!!!!!
    -> External toolchain gcc version = 4.9.x
    -> External toolchain kernel headers series = 4.1.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
    1. 配置 System configuration
        System configuration
    -> System hostname = cxn_sys //平台名字，自行设置
    -> System banner = Welcome to cxn system //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 = 123456 //登录密码为 123456
    1. 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
    1. 禁止编译 Linux 内核和 uboot
        -> Kernel
        -> [ ] Linux Kernel //不要选择编译 Linux Kernel 选项！

    -> Bootloaders
        -> [ ] U-Boot //不要选择编译 U-Boot 选项！
    1. 配置第三方软件和库的配置
        Target packages
        -> Libraries
            -> Audio/Sound
                -> -*- alsa-lib ---> 此配置项下的文件全部选中

    Target packages
        -> Audio and video applications
            -> alsa-utils 此目录下的软件全部选中
  3. (编译过程出现.stamp_configured' failed)时的处理 
        vim /home/cxn/tool/arm-linux-gnueabihf/gcc-linaro/gcc-linaro-4.9.4-2017.01-x86_64_arm-linux-gnueabihf/arm-linux-gnueabihf/libc/usr/include/linux/version.h

    把 LINUX_VERSION_CODE为262144，此值为10进制，转换为16进制为40000，对应的linux内核版本为4.0.x，在此要把该值改为与buildroot中配置的一致，即为4.1.x，转换为16进制为40100，对应的十进制为262400，将文件中改为此值保存如下
  4. sudo make
  5. 把 images/rootfs.tar 拷贝到 nfs 的 buildroot 目录下解压，开发版uboot修改变量，挂载到该目录下的文件系统

buildroot 下的 busybox 配置

  • 操作流程