WITH_CTF breaks CD loader: "File too big"

[Warner Losh]

On Mon, Dec 3, 2018 at 11:14 AM Yuri Pankov <yuripv at yuripv.net> wrote:

> Warner Losh wrote:
> > On Mon, Dec 3, 2018 at 9:56 AM Yuri Pankov <yuripv at yuripv.net> wrote:
> >
> >> Yuri Pankov wrote:
> >>> Warner Losh wrote:
> >>>> On Mon, Dec 3, 2018 at 8:10 AM Warner Losh <imp at bsdimp.com> wrote:
> >>>>
> >>>>>
> >>>>> On Mon, Dec 3, 2018 at 12:24 AM Baptiste Daroussin <bapt at freebsd.org
> >
> >>>>> wrote:
> >>>>>
> >>>>>> On Sun, Dec 02, 2018 at 06:08:34PM +0300, Yuri Pankov wrote:
> >>>>>>> Hi,
> >>>>>>>
> >>>>>>> Building disc1.iso using `make release` and having WITH_CTF set in
> >>>>>>> src.conf leads to "File too big" displayed when booting the image.
> >>>>>>>
> >>>>>>> Would it make sense to build loader and related parts without CTF
> >>>>>>> unconditionally as it doesn't look useful there?
> >>>>>>>
> >>>>>>
> >>>>>> Fully agree with you
> >>>>>>
> >>>>>
> >>>>> What a great Idea. We already turn it off in defs.mk:
> >>>
> >>> Sorry about that, I incorrectly assumed it wasn't done yet as there was
> >>> a difference for me.
> >>>
> >>>>> MK_CTF=         no
> >>>>>
> >>>>> which should be global to every single Makefile under stand. I'm not
> >> sure
> >>>>> why that's turning it back on.
> >>>>>
> >>>>
> >>>> % cat /etc/src.conf
> >>>> WITH_CTF=yes
> >>>> FRED=present
> >>>> % cd stand/cdboot
> >>>> % make -V MK_CTF
> >>>> no
> >>>> % make -V FRED
> >>>> present
> >>>> %
> >>>>
> >>>> So this sure sounds like a false positive to me. Do you have logs
> >> showing
> >>>> cdboot building with MK_CTF=yes?
> >>>
> >>> Diff'ing the log for src/stand w/o and with -DWITH_CTF shows a lot of
> >>> ctfconvert calls in the latter case.  Attached is the diff of binary
> >>> sizes in obj/ for stand/i386; could one of those be the problem I'm
> >> seeing?
> >>
> >> If ctfconvert calls are indeed the source of problem, then something
> >> seems to be wrong here (I didn't mention the "cdboot" binary exactly,
> >> rather the binary it's trying to load):
> >>
> >> yuripv:~/ws/ctf/stand/i386/loader$ make -V MK_CTF -V CTFCONVERT_CMD
> >> no
> >>
> >> yuripv:~/ws/ctf/stand/i386/loader$ make -DWITH_CTF -V MK_CTF -V
> >> CTFCONVERT_CMD
> >> no
> >> ctfconvert -L VERSION ${.TARGET}
> >>
> >
> > Ding! We have a winner:  order of operations not quite right. We included
> > src.opts.mk which includes bsd.own.mk which defines CTFCONVERT_CMD and
> then
> > we change the MK_CTF value which has no effect. Unlike the lazy
> evaluation
> > in makefile rules, where the last one wins, when we're parsing stuff for
> > .if, it's the current value that's used. The solution is to include
> > src.opts.mk later after we set the MK_foo overrides.
> >
> > r341433 should fix that.
>
> Thank you.
>

Please give it a spin and let me know if we're golden. I'll MFC it then
since this should be in 12.1.

Warner