1) 下载busybox源代码,并解包
$ wget -c http://www.busybox.net/downloads/busybox-1.7.0.tar.bz2
$ tar jxvf busybox-1.7.0.tar.bz2
2) 下载交叉编译工具,并安装
我下载的是:arm-2009q1-161-arm-none-eabi.bin
说明:要正确设置好PATH变量。
例如将“你的目录”/CodeSourcery/Sourcery_G++_Lite/bin加到PATH路径中。
3)进入到busybox解压后的源文件目录中,修改Makefile
将第176行改为:
CROSS_COMPILE ?=arm-none-linux-gnueabi-
4)进行编译选项配置
a、
$ make menuconfig
Busybox Settings --->
Build Options --->
[*] Build BusyBox as a static binary(no shared libs)
说明:这个选项一定要选,这样才能把busybox编译成静态链接的可执行文件,运行时可以独立于其他库。
b、
Installation Options --->
[*] Don't use /usr
说明:这个也一定要选,否则make install后,busybox将安装在原来系统的/usr下,将你原有的命令都覆盖了!
5)配置好后可以编译了,执行如下命令:
$ make
发现没过多久,就报错了,晕,错误内容如下:
applets/applets.c:20:2: warning: #warning Static linking against glibc produces buggy executables
applets/applets.c:21:2: warning: #warning (glibc does not cope well with ld --gc-sections).
applets/applets.c:22:2: warning: #warning See sources.redhat.com/bugzilla/show_bug.cgi?id=3400
applets/applets.c:23:2: warning: #warning Note that glibc is unsuitable for static linking anyway.
applets/applets.c:24:2: warning: #warning If you still want to do it, remove -Wl,--gc-sections
applets/applets.c:25:2: warning: #warning from top-level Makefile and remove this warning.
applets/applets.c:26:2: error: #error Aborting compilation.
make[1]: *** [applets/applets.o] 错误1
make: *** [applets] 错误2
看到它给出了提示,说glibc库不适和用来静态编译,最后给出解决方案就是将applets/applets.c中这部分内容给去掉,也就是19-27行。
然后再make进行编译。
不多久又报错了,看看具体错误:
.../compal/CodeSourcery/Sourcery_G++_Lite/bin/../arm-none-linux-gnueabi/libc/usr/include/linux/netfilter.h:56:17: error: field 'in' has incomplete type
.../CodeSourcery/Sourcery_G++_Lite/bin/../arm-none-linux-gnueabi/libc/usr/include/linux/netfilter.h:57:18: error: field 'in6' has incomplete type
ipsvd/tcpudp.c: In function 'tcpudpsvd_main':
ipsvd/tcpudp.c:314:10: warning: ignoring return value of 'write', declared with attribute warn_unused_result
make[1]: *** [ipsvd/tcpudp.o] 错误1
make: *** [ipsvd] 错误2
看到说在我们下载的交叉编译库中有个头文件中的in及in6类型不对,解决的办法就是:
在.../arm-none-linux-gnueabi/libc/usr/include/linux/netfilter.h的开头
添加缺少的头文件:
#include <netinet/in.h>
然后再进行编译。(这次可以安全到最后了,呵呵)
结束后会在当前目录下看到busybox这个可执行文件