[Buildroot] ebtables and musl

[Peter Seiderer <ps.report@gmx.net>]

Hello Markus,

On Sat, 13 Jun 2020 13:23:17 +0200, Peter Seiderer <ps.report@gmx.net> wrote:

> Hello Markus,
>
> On Fri, 12 Jun 2020 13:10:28 -0700, Markus Mayer <mmayer@broadcom.com> wrote:
>
> > Hi all,
> >
> > I see this patch in Buildroot:
> > http://lists.busybox.net/pipermail/buildroot/2017-February/184225.html
> >
> > However, I am still running into the issue it is supposed to fix.
> >
> > This is with musl-1.2.0, the latest and greatest. I'm no longer stuck
> > with the ancient libmusl that caused issues with procps. It doesn't
> > seem to help with ebtables, though.
> >
> > /mnt/disk1/Development/br-musl/output/arm64/host/bin/aarch64-linux-gcc
> > -D_LARGEFILE_SOURCE -D_LARGEFILE64_SOURCE -D_FILE_OFFSET_BITS=64  -Os
> >   -fPIC -O3 -DPROGVERSION=\"2.0.10-4\" -DPROGNAME=\"ebtables\"
> > -DPROGDATE=\"December\ 2011\" -D_PATH_ETHERTYPES=\"/etc/ethertypes\"
> > -DEBTD_ARGC_MAX=50 -DEBTD_CMDLINE_MAXLN=2048
> > -DLOCKFILE=\"/var/lib/ebtables/lock\" -DLOCKDIR=\"/var/lib/ebtables/\"
> > -c -o extensions/ebt_802_3.o extensions/ebt_802_3.c -Iinclude/
> > In file included from include/linux/netfilter_bridge.h:8:0,
> >                  from include/linux/netfilter_bridge/ebtables.h:17,
> >                  from include/ebtables_u.h:28,
> >                  from useful_functions.c:25:
> > include/linux/if_ether.h:119:8: error: redefinition of 'struct ethhdr'
> >  struct ethhdr {
> >         ^~~~~~
> > In file included from
> > ../../host/aarch64-buildroot-linux-musl/sysroot/usr/include/netinet/ether.h:8:0,
> >                  from include/ebtables_u.h:27,
> >                  from useful_functions.c:25:
> > ../../host/aarch64-buildroot-linux-musl/sysroot/usr/include/netinet/if_ether.h:113:8:
> > note: originally defined here
> >  struct ethhdr {
> >         ^~~~~~
> > Makefile:78: recipe for target 'useful_functions.o' failed
> > make[2]: *** [useful_functions.o] Error 1
> > make[2]: *** Waiting for unfinished jobs....
> >
> > I am not quite sure what to make of it yet.
> >
> > Is it cause by the fact that include/linux/if_ether.h defines
> >
> > #ifndef _LINUX_IF_ETHER_H
> > #define _LINUX_IF_ETHER_H
> >
> > but include/netinet/if_ether.h defines
> >
> > #ifndef _NETINET_IF_ETHER_H
> > #define _NETINET_IF_ETHER_H
> >
> > and they both end up being included?
> >
> > $ find . -name if_ether.h -ls
> >   6025818      4 -rw-r--r--   1 mmayer   mmayer       1506 May 26
> > 16:30 ./build/linux-custom/include/linux/if_ether.h
> >   6028683      8 -rw-r--r--   1 mmayer   mmayer       7461 May 26
> > 16:30 ./build/linux-custom/include/uapi/linux/if_ether.h
> >   6047054      8 -rw-r--r--   1 mmayer   mmayer       5751 Dec 15
> > 2011 ./build/ebtables-2.0.10-4/include/linux/if_ether.h
> >   5934557      8 -rw-r--r--   1 mmayer   mmayer       7016 Jun 10
> > 16:52 ./host/aarch64-buildroot-linux-musl/sysroot/usr/include/linux/if_ether.h
> >   5935035      4 -rw-r--r--   1 mmayer   mmayer       3625 Jun 10
> > 16:52 ./host/aarch64-buildroot-linux-musl/sysroot/usr/include/netinet/if_ether.h
> >
> > Also, there's five different copies of if_ether.h floating around.
>
> Care to provide a config/defconfig file for the failure (and provide the
> used buildroot version)?

Or did your use an external toolchain?

The patch states ([1]):

	Upstream status: not upstreamable; depends on Buildroot local musl patch

Regards,
Peter

[1] https://git.buildroot.net/buildroot/tree/package/ebtables/0002-Fix-musl-compatibility.patch#n11

>
> >
> > While we are on the topic of ebtables, why is buildroot still using
> > v2.0.10-4 from 2014 when there is 2.0.11 from 2019 (as per
> > http://ftp.netfilter.org/pub/ebtables/)? Is it just a matter of
> > submitting a patch to update it or is there an underlying reason to
> > keep the old version around?
>
> Probably not, care to send an ebtables update patch?
>
> Regards,
> Peter
>
> >
> > Thanks,
> > -Markus
> > _______________________________________________
> > buildroot mailing list
> > buildroot at busybox.net
> > http://lists.busybox.net/mailman/listinfo/buildroot
>
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