> And if I remove it then the error goes away! The build hasn't finished
> yet for me, but it's gone past the offending xor-neon.c file so we
> /should/ be good.
>
> I'm not really sure why though, do you know why this phase was required
> at the time? I haven't tested that linux-libre still builds on x86 with
> this phase removed yet, trying it now.

OK, I've now built kernels with the attached patch on the kernel-updates
branch for x86_64 and aarch64! I've also tested with
--system=armhf-linux on the softiron and --system=i868-linux on my x86
desktop, it all looks good!