Hi, I noticed this happening since linux-libre 5.3.1 and some bug reports on Arch suggested it was a matter of rebuilding the kernel, so I just waited for the next update, but the issue persisted. Said bug reports are closed without a clear fix so I don't have more helpful info :/

<pre> ```
DKMS make.log for wireguard-0.0.20191012 for kernel 5.3.7-gnu-1 (x86_64)
sáb nov 2 11:38:35 -03 2019
make: se entra en el directorio '/usr/lib/modules/5.3.7-gnu-1/build'
CC [M] /var/lib/dkms/wireguard/0.0.20191012/build/noise.o
CC [M] /var/lib/dkms/wireguard/0.0.20191012/build/main.o
cc1: error: incompatible gcc/plugin versions
cc1: error: no se puede inicializar el plugin ./scripts/gcc-plugins/structleak_plugin.so
make[1]: *** [scripts/Makefile.build:281: /var/lib/dkms/wireguard/0.0.20191012/build/main.o] Error 1
make[1]: *** Se espera a que terminen otras tareas....
cc1: error: incompatible gcc/plugin versions
cc1: error: no se puede inicializar el plugin ./scripts/gcc-plugins/structleak_plugin.so
make[1]: *** [scripts/Makefile.build:281: /var/lib/dkms/wireguard/0.0.20191012/build/noise.o] Error 1
make: *** [Makefile:1626: _module_/var/lib/dkms/wireguard/0.0.20191012/build] Error 2
make: se sale del directorio '/usr/lib/modules/5.3.7-gnu-1/build'
</pre>
```