Hey Rui, I fixed it! It turned out to be caused by -fvisibility=hidden undoing the effect of the binutils fix from a while back. Here's the patch that makes the problem go away:
https://git.zx2c4.com/wireguard-linux-compat/commit/?id=178cdfffb99f2fd6fb4a5bfd2f9319461d93f53b This will be in the next compat release. Jason
