Error upgrading 11-STABLE to 12-STABLE in ifunc resolver

[Ed Maste]

On Thu, 27 Dec 2018 at 17:20, Warner Losh <imp at bsdimp.com> wrote:
>
> > Yes, you should update to the latest stable/11.  More details, you need
> > to have host clang which includes the r339284 commit.
>
> We either need to fix this problem, or we need to bump the minimum in
> Makefile.inc1.

amd64_get_fsbase.c should be compiled with the toolchain built for
stable/12 and this error shouldn't occur absent non-default flags such
as WITHOUT_CLANG_BOOTSTRAP, I believe. Thierry did this occur with a
plain make buildworld, without src.conf settings?