redefinition of struct in6_addr error on compiling clickos

[M3hd1R]

Hi
I want to compile clickos. I do this with the following command and environment variables:

./configure --enable-minios --with-xen=$XEN_ROOT
make minios
export MINIOS_ROOT=pwd/mini-os
export XEN_ROOT=/root/xen/
export NEWLIB_ROOT=pwd/toolchain/x86_64-root/x86_64-xen-elf
export LWIP_ROOT=pwd/toolchain/x86_64-root/x86_64-xen-elf

and when I first do it I get the following error:
can not find xenstore.h: no such a file or directory
In order to resolve above error I checkout to 'stable-4.1' branch of xen project, and run compile commands again
then my error changes to the following error:

In file included from /root/mini-os/include/posix/netinet/in.h:7,
from /root/clickos/include/click/glue.hh:71,
from /root/clickos/include/click/hashcontainer.hh:3,
from /root/clickos/include/click/hashtable.hh:20,
from /root/clickos/include/click/lexer.hh:4,
from /root/clickos/minios/click.cc:42:
/root/mini-os/include/posix/netinet/in6.h:91:8: error: redefinition of 'struct in6_addr'
struct in6_addr {

how cat I resolve this problem?
thanks