linux-kernel - Re: 2.6.28 headers break kbd and net-tools userspace builds

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Date:	Thu, 22 Jan 2009 18:56:45 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Andrew Walrond <andrew@...rond.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: 2.6.28 headers break kbd and net-tools userspace builds

On Thu, Jan 22, 2009 at 12:45:13PM +0000, Andrew Walrond wrote:
> Breaks kbd like this:
> 
>  /usr/include/linux/serial.h:164: error: expected 
> specifier-qualifier-list before '__u32'

This is know and fixed. The fix is to include linux/types.h
in serial.h.

> 
> and net-tools like this:
> 
>  In file included from /usr/include/linux/if_tunnel.h:5,
>                   from iptunnel.c:39:
>  /usr/include/linux/ip.h:85: error: redefinition of 'struct iphdr'
> 
> Both build fine with 2.6.27.10 headers.

Herbert added an include of ip.h in commit:

commit c19e654ddbe3831252f61e76a74d661e1a755530
Author: Herbert Xu <herbert@...dor.apana.org.au>
Date:   Thu Oct 9 11:59:55 2008 -0700

    gre: Add netlink interface

    This patch adds a netlink interface that will eventually displace
    the existing ioctl interface.  It utilises the elegant rtnl_link_ops
    mechanism.

This causes struct iphdr to be redefined.
But there is noting wrong in including ip.h in if_tunnel.h.

I checked the include guards and they are correct.

Could you please investige where it picks up the first definition
of struct iphdr.

> Hope that's useful.

Anything that can improve the exported user headers are useful - thanks.

	Sam
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