Am 04.05.2017 um 23:39 schrieb Thomas Petazzoni <thomas.petazzoni(a)free-electrons.com>om>: Hello, Since a few days, we are seeing build failures of the radvd package in Buildroot: http://autobuild.buildroot.net/?reason=radvd-2.12 The build failure is: /home/buildroot/autobuild/run/instance-2/output/host/usr/arc-buildroot-linux-uclibc/sysroot/usr/include/linux/if_arp.h:121:8: error: redefinition of 'struct arpreq_old' struct arpreq_old { ^~~~~~~~~~ In file included from includes.h:90:0, from recv.c:17: /home/buildroot/autobuild/run/instance-2/output/host/usr/arc-buildroot-linux-uclibc/sysroot/usr/include/net/if_arp.h:147:8: note: originally defined here struct arpreq_old ^~~~~~~~~~ [...] The build failures happens with uClibc-ng toolchains in combination with Linux 4.11 kernel headers, so it seems to be a new thing caused by Linux 4.11 headers. However the kernel Git history doesn't show any change on this header file between 4.10 and 4.11. Any idea?