ARM Linux根文件系统制作

1. 准备工作

Busybox源码下载

具体下载目录在 /pub/2011/07/20/Busybox/

# cd /home/liao

# tar –jxvf busybox-1.13.3.tar.bz2

# cd busybox-1.13.3

2. busybox编译

2.1修改Makefile

CROSS_COMPILE ?=arm-linux-

ARCH ?=arm

2.2 配置busybox

# make menuconfig

Busybox Settings--->

Build Options--->

[*] Build BusyBox as a static binary(no shared libs)

[*] Build with Large File Support(for accessing files>2GB)

       Installation Options->

[]Don’t use /usr

Applets links (as soft-links) --->

(./_install) BusyBox installation prefix        修改(./_install)为/utu2440/rootfs

       Busybox Library Tuning --->

[*] vi-style line editing commands

[*]Fancy shell prompts

Linux Module Utilities--->

(/lib/modules)Default directory containing modules

(modules.dep)Default name of modules.dep

[ ] simplified modutils

[*] insmod

[*] rmmod

[*] lsmod

[*] modprobe

-----options common to multiple modutils

[ ] support version 2.2/2.4 Linux kernels

[*]Support tainted module checking with new kernels

[*]Support for module .aliases file

[*] support for modules.symbols file

Linux System Utilities --->

[*]Support /etc/mdev.conf

[*]Support command execution at device addition/removal

# make

# make install

编译出错：

networking/interface.c:818: error: `ARPHRD_INFINIBAND' undeclared here (not in a function)

networking/interface.c:818: error: initializer element is not constant

networking/interface.c:818: error: (near initialization for `ib_hwtype.type')

make[1]: *** [networking/interface.o] 错误 1

make: *** [networking] 错误 2

解决：在networking/interface.c文件中添加：

#define ARPHRD_INFINIBAND 32   /* InfiniBand */

编译后，在rootfs目录下会生成目录bin、sbin、usr和文件linuxrc的内容

3. 建立根文件目录

    前面已经生成了bin、sbin等目录，这里建立一些必要的文件目录

# mkdir dev etc lib proc sys mnt tmp var home boot root

# mkdir usr/lib usr/modules

# mkdir etc/init.d etc/sysconfig

# mkdir mnt/etc mnt/jffs2 mnt/data mnt/temp

# mkdir var/lib var/lock var/run var/tmp

# chmod 1777 tmp

# chmod 1777 var/tmp

# sudo mknod -m 600 dev/console c 5 1

# sudo mknod -m 600 dev/null c 1 3

这两个设备节点需要root用户建立，具体原因有待研究