iplink: support add/delete

[Denys Vlasenko]

On Thursday 05 August 2010 22:20, Oliver Metz wrote:
> Hi,
> since this commit (http://git.busybox.net/busybox/commit/?id=6faebfa663fd008fa28f0d69d0663fe80675ebec) busybox doesn't compile with older kernels anymore. I didn't figure out the exact version.
> We are running busybox on an embedded mipsel router and can't update to a newer kernel version because we have binary only modules from the vendor. Our kernel versions are 2.6.13.1 and 2.6.19.2.
> 
>   CC      networking/libiproute/ipaddress.o
>   CC      networking/libiproute/iplink.o
>   CC      networking/libiproute/iproute.o
> networking/libiproute/ipaddress.c: In function 'print_linkinfo':
> networking/libiproute/ipaddress.c:167: error: 'IFLA_OPERSTATE' undeclared (first use in this function)
> networking/libiproute/ipaddress.c:167: error: (Each undeclared identifier is reported only once
> networking/libiproute/ipaddress.c:167: error: for each function it appears in.)
> networking/libiproute/iplink.c: In function 'do_change':
> networking/libiproute/iplink.c:336: error: 'IFLA_LINKINFO' undeclared (first use in this function)
> networking/libiproute/iplink.c:336: error: (Each undeclared identifier is reported only once
> networking/libiproute/iplink.c:336: error: for each function it appears in.)
> networking/libiproute/iplink.c:337: error: 'IFLA_INFO_KIND' undeclared (first use in this function)
> make[2]: *** [networking/libiproute/ipaddress.o] Error 1
> 
> Is there a way to disable this add/delete support for older kernels so that we are able to compile busybox with ip applet again? Or is there an alternative piece of code for this?

You can add

#ifndef FOO
# define FOO VAL
#endif

to, say, busybox/networking/libiproute/ip_common.h

You can find required VAL by downloading and checking
recent kernels.

-- 
vda