Re: [ptxdist] iproute2 build errors when updating to 4.6

[Michael Olbrich <m.olbrich@pengutronix.de>]

On Sun, May 22, 2016 at 01:55:13AM +0200, Clemens Gruber wrote:
> I need some features from the new iproute2 4.6, but there seem to be
> some kernel header vs glibc header incompatibilities occuring when
> building the new iproute2 4.6 for ptxdist.
> 
> Two examples of the numerous build errors on ptxdist 2016.04.0, a
> toolchain with glibc 2.22 and kernel + kernel-headers version 4.6.
> 
> In file included from m_ipt.c:17:0:
> ../include/linux/if.h:106:19: error: redeclaration of enumerator 'IFF_UP'
>  #define IFF_UP    IFF_UP
>                    ^
> ../include/linux/if.h:79:2: note: previous definition of 'IFF_UP' was here
>   IFF_UP    = 1<<0,  /* sysfs */
>   ^~~~~~
> 
> In file included from ../include/xtables.h:16:0,
>                  from ../include/iptables.h:5,
>                  from m_ipt.c:18:
> TOOLCHAIN/sysroot-arm-v7a-linux-gnueabihf/usr/include/net/if.h:111:8: error: redefinition of 'struct ifmap'
>  struct ifmap
>         ^~~~~
> In file included from m_ipt.c:17:0:
> ../include/linux/if.h:189:8: note: originally defined here
>  struct ifmap {
>         ^~~~~
> 
> There is a commit in version 4.6 of iproute2, which should already have fixed
> these build errors:
> http://git.kernel.org/cgit/linux/kernel/git/shemminger/iproute2.git/commit/?id=8a781d7e2580e14f097b23a7c4731bafc800a824
> 
> But somehow the problems still occur on ptxdist.
> 
> Any ideas what's going on?

I think that fix only works if net/if.h is included before linux/if.h. And
that's not the case in m_ipt.c.

Regards,
Michael

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