[Aboriginal] musl and kernel headers [was Re: system-images 1.4.2: od is broken; bzip2 is missing]

[Denys Vlasenko]

On Tue, Oct 6, 2015 at 3:44 AM, Rich Felker <dalias at aerifal.cx> wrote:
>> >
>> >   #include <netinet/in.h>
>> >   #include <linux/if_bridge.h>
>> > results in:
>> >   In file included from /usr/include/linux/if_bridge.h:18,
>> >                    from networking/brctl.c:67:
>> >   /usr/include/linux/in6.h:32: error: redefinition of 'struct in6_addr'
>> >   /usr/include/linux/in6.h:49: error: redefinition of 'struct sockaddr_in6'
>> >   /usr/include/linux/in6.h:59: error: redefinition of 'struct ipv6_mreq'
>> >
>> > and
>> >
>> >   #include <linux/ethtool.h>
>> >   #include <net/ethernet.h>
>> > results in:
>> >   In file included from /usr/include/net/ethernet.h:10,
>> >                    from networking/ifplugd.c:41:
>> >   /usr/include/netinet/if_ether.h:96: error: redefinition of 'struct ethhdr'
>> >
>>
>> That I leave to Rich. :)
>
> Including kernel headers is just really problematic. These days they
> try to make it work on glibc with a complex dance between glibc's
> headers and the kernel headers. You're likely to have the best luck by
> including the libc headers first.

brctl.c  was including <linux/if_bridge.h> after <netinet/in.h>