这里以ixp435平台为例子。 Get source code: busybox-1.7.2-1 (当然其他的版本的都可以) Tool chain:armv5-linux-* (和编linux kernel的相同) make menuconfig ,配置功能,可以从其他地方拿一个过来改改。注意打开'Busybox Settings'->'Installation Options'->' Don't use /usr' 这样在安装的时候会安装到自己指定的目录(default ./_install),或者可以在make时加参数CONFIG_PREFIX=目录 make ARCH=arm CROSS_COMPILE=armv5b-linux- install 复制必要的库文件: 如果没有,会出现这样的错误 Failed to execute /sbin/init. Attempting defaults... Kernel panic - not syncing: No init found. Try passing init= option to kernel. 库文件要到这里使用的编译器相对应的目录中找。这里一般需要两类库文件:一类是busybox编译完后提示出来的lib:比如Trying libraries: crypt m Library crypt is needed Library m is needed Final link with: crypt m 这里意思是需要libcrypt和libm的库。还有一类是最基本的libc库和ld库。 做ramdisk,可以参考我前面的**。 到这里,一个最简单的fs已经工作了,已经可以看到这样一个东西了 RAMDISK: Compressed image found at block 0 Time: OSTS clocksource has been installed. VFS: Mounted root (ext2 filesystem). Freeing init memory: 140K init started: BusyBox v1.7.2 (2008-01-30 14:38:42 CST) starting pid 18, tty '': '/etc/init.d/rcS' Cannot run '/etc/init.d/rcS': No such file or directory
Please press Enter to activate this console. starting pid 19, tty '': '/bin/sh'
BusyBox v1.7.2 (2008-01-30 14:38:42 CST) built-in shell (ash) Enter 'help' for a list of built-in commands.
# ls bin dev lib linuxrc lost+found sbin
复制/etc/文件,直接使用busybox source中带的sample, cp examples/bootfloppy/etc/* _install/ -ar 再创建一个/proc目录, 现在是这个样子 Freeing init memory: 140K init started: BusyBox v1.7.2 (2008-01-30 14:38:42 CST) starting pid 18, tty '': '/etc/init.d/rcS' starting pid 20, tty '': '/bin/sh'
BusyBox v1.7.2 (2008-01-30 14:38:42 CST) built-in shell (ash) Enter 'help' for a list of built-in commands.
Processing /etc/profile... Done
# ls bin etc linuxrc proc dev lib lost+found sbin 到这里为止,一个基本的文件系统就可以了。接下来就是往里加入自己需要的东西就可以了。
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