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Date:      Wed, 16 May 2018 07:43:18 -0600
From:      Warner Losh <imp@bsdimp.com>
To:        "Rodney W. Grimes" <freebsd-rwg@pdx.rh.cn85.dnsmgr.net>
Cc:        Hans Petter Selasky <hps@selasky.org>, Emeric POUPON <emeric.poupon@stormshield.eu>,  Oliver Pinter <oliver.pinter@hardenedbsd.org>, freebsd-arch <freebsd-arch@freebsd.org>
Subject:   Re: Can't build kernel anymore: amd64 kernel requires linker ifunc support
Message-ID:  <CANCZdfo-dPO8AMjh8CbgQJ_z=pieG8Qq=A8QDxdt2C-gzQ12mg@mail.gmail.com>
In-Reply-To: <201805161335.w4GDZvSM000645@pdx.rh.CN85.dnsmgr.net>
References:  <CANCZdfq_V7CO8v%2BjXu0hQG1-k3-7a%2BjPK_abDoe_9V3p4Lk8DA@mail.gmail.com> <201805161335.w4GDZvSM000645@pdx.rh.CN85.dnsmgr.net>

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On Wed, May 16, 2018 at 7:35 AM, Rodney W. Grimes <
freebsd-rwg@pdx.rh.cn85.dnsmgr.net> wrote:

> > On Wed, May 16, 2018 at 3:49 AM, Hans Petter Selasky <hps@selasky.org>
> > wrote:
> >
> > > On 05/16/18 11:42, Emeric POUPON wrote:
> > >
> > >>
> > >> Thanks for your help.
> > >>>>
> > >>>> Actually, I already did all the steps described here:
> > >>>> https://www.freebsd.org/doc/handbook/makeworld.html with success.
> > >>>> After step 10, I now get this error.
> > >>>> I tried to put WITHOUT_LLD_BOOTSTRAP=yes in /etc/src.conf + rebuild
> > >>>> everything with no luck.
> > >>>>
> > >>>>
> > >>>> Please remove this line from your src.conf, lld is required for
> building
> > >>> kernel since the ifunc support.
> > >>>
> > >>>
> > >> I already did all the steps of the handbook without this line, and I
> > >> finally had the issue I described.
> > >> What I told is that adding this line + make buildworld does not solve
> the
> > >> kernel building issue.
> > >>
> > >
> > > Try adding:
> > >
> > > -m $PWD/share/mk
> > >
> > > After make.
> > >
> > > Not sure if it helps.
> >
> >
> > LD=ld.lld make
> >
> > is the magic here. The kernel needs a new linker to properly link in the
> > ifunc, and that's not our ancient ld. lld does it, as does the latter-day
> > binutils.
>
> Since this now seems to be a mandatory thing to get a kernel built
> can it please be set in the Makefile that is needing it?
>

No. It's a transient requirement that will be gone shortly when Ed does the
next step of lld integration.

Wanrer



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