Build wireguard-linux-compat on SLES15 (s390x)

[Faustin Lammler <faustin@fala.red>]

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Hi!

I am trying to compile wireguard-linux-compat on SLES15 (s390x) without
success. Maybe I should try to install it directly from packages but I
am not expert with SLES and I did not find how so far.

I managed to install wireguard-tools but the kernel does not provide
the wireguard module, see bellow:
| $ uname -r
| 5.3.18-24.83-default
| $ lsmod | grep wireguard
| $ sudo wg-quick up /etc/wireguard/wg0.conf
| [#] ip link add wg0 type wireguard
| Error: Unknown device type.
| Unable to access interface: Protocol not supported
| [#] ip link delete dev wg0
| Cannot find device "wg0"

Here is the build error:
| $ cd /tmp && git clone https://git.zx2c4.com/wireguard-linux-compat
| $ make -C wireguard-linux-compat/src -j$(nproc)
| make: Entering directory '/tmp/wireguard-linux-compat/src'
|   CC [M]  /tmp/wireguard-linux-compat/src/main.o
|   CC [M]  /tmp/wireguard-linux-compat/src/noise.o
|   CC [M]  /tmp/wireguard-linux-compat/src/device.o
|   CC [M]  /tmp/wireguard-linux-compat/src/peer.o
|   CC [M]  /tmp/wireguard-linux-compat/src/timers.o
|   CC [M]  /tmp/wireguard-linux-compat/src/queueing.o
|   CC [M]  /tmp/wireguard-linux-compat/src/send.o
|   CC [M]  /tmp/wireguard-linux-compat/src/receive.o
|   CC [M]  /tmp/wireguard-linux-compat/src/socket.o
|   CC [M]  /tmp/wireguard-linux-compat/src/peerlookup.o
|   CC [M]  /tmp/wireguard-linux-compat/src/allowedips.o
|   CC [M]  /tmp/wireguard-linux-compat/src/ratelimiter.o
|   CC [M]  /tmp/wireguard-linux-compat/src/cookie.o
|   CC [M]  /tmp/wireguard-linux-compat/src/netlink.o
|   CC [M]  /tmp/wireguard-linux-compat/src/crypto/zinc/chacha20/chacha20.o
|   CC [M]  /tmp/wireguard-linux-compat/src/crypto/zinc/poly1305/poly1305.o
|   CC [M]  /tmp/wireguard-linux-compat/src/crypto/zinc/chacha20poly1305.o
| In file included from <command-line>:
| /tmp/wireguard-linux-compat/src/compat/compat.h:859:31: error: expected identifier or ‘(’ before ‘{’ token
|   859 | #define genl_dumpit_info(cb) ({ \
|       |                               ^
| /usr/src/linux-5.3.18-24.83/include/net/genetlink.h:138:1: note: in expansion of macro ‘genl_dumpit_info’
|   138 | genl_dumpit_info(struct netlink_callback *cb)
|       | ^~~~~~~~~~~~~~~~
| make[3]: *** [/usr/src/linux-5.3.18-24.83/scripts/Makefile.build:282: /tmp/wireguard-linux-compat/src/netlink.o] Error 1
| make[3]: *** Waiting for unfinished jobs....
| make[2]: *** [/usr/src/linux-5.3.18-24.83/Makefile:1655: _module_/tmp/wireguard-linux-compat/src] Error 2
| make[1]: *** [../../../linux-5.3.18-24.83/Makefile:179: sub-make] Error 2
| make: *** [Makefile:26: module] Error 2
| make: Leaving directory '/tmp/wireguard-linux-compat/src'

Any help would be really appreciated.
Cheers!

-- 
Faustin
GPG: F652 BCD1 1AA8 8975 F010 48A5 390A 2F27 832A 5C79

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