dkms module build fails since at least 20191226 on CentOS

[Silvan Nagl]

Same problem persists under CentOS in newest version 0.0.20200105.

On 1/5/20 3:17 PM, Silvan Nagl wrote:
> Hi again,
>
> since the last WireGuard upgrade (wireguard-0.0.20191226) the dkms
> module does not build anymore. I just noticed that my CentOS box still
> runs on 0.0.20191206 so it appeared to work at firs glance but actually
> it just uses the old dkms module which was not overwritten by the new
> installation because it failed to build.
>
> Here is make all output:
>
> [root at static wireguard-0.0.20191226]# make all
>   CC [M]  /usr/src/wireguard-0.0.20191226/main.o
>   CC [M]  /usr/src/wireguard-0.0.20191226/noise.o
>   CC [M]  /usr/src/wireguard-0.0.20191226/device.o
>   CC [M]  /usr/src/wireguard-0.0.20191226/peer.o
>   CC [M]  /usr/src/wireguard-0.0.20191226/timers.o
>   CC [M]  /usr/src/wireguard-0.0.20191226/queueing.o
>   CC [M]  /usr/src/wireguard-0.0.20191226/send.o
>   CC [M]  /usr/src/wireguard-0.0.20191226/receive.o
> In file included from ./include/linux/init.h:5,
>                  from /usr/src/wireguard-0.0.20191226/compat/compat.h:50,
>                  from <command-line>:
> /usr/src/wireguard-0.0.20191226/receive.c: In function ‘wg_packet_receive’:
> /usr/src/wireguard-0.0.20191226/receive.c:578:17: error: implicit
> declaration of function ‘rng_is_initialized’; did you mean
> ‘zone_is_initialized’? [-Werror=implicit-function-declaration]
>        unlikely(!rng_is_initialized())) {
>                  ^~~~~~~~~~~~~~~~~~
> ./include/linux/compiler.h:77:42: note: in definition of macro ‘unlikely’
>  # define unlikely(x) __builtin_expect(!!(x), 0)
>                                           ^
> cc1: some warnings being treated as errors
> make[2]: *** [scripts/Makefile.build:316:
> /usr/src/wireguard-0.0.20191226/receive.o] Error 1
> make[1]: *** [Makefile:1528: _module_/usr/src/wireguard-0.0.20191226]
> Error 2
> make: *** [Makefile:38: module] Error 2
>
> Greetings,
>
> Silvan
>
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