linux-kernel - Re: [PATCH v2 7/8] kbuild: use obj-y instead extra-y for objects placed at the head

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Message-ID: <CAMuHMdUxrXgJ7HHgk1vSyg6_S8TN3RvEW=QNgH9U0UueM41N-Q@mail.gmail.com>
Date:   Tue, 20 Sep 2022 08:56:25 +0200
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Guenter Roeck <linux@...ck-us.net>
Cc:     Masahiro Yamada <masahiroy@...nel.org>,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        linux-arch@...r.kernel.org
Subject: Re: [PATCH v2 7/8] kbuild: use obj-y instead extra-y for objects
 placed at the head

Hi Günter,

On Tue, Sep 20, 2022 at 12:59 AM Guenter Roeck <linux@...ck-us.net> wrote:
> On Tue, Sep 06, 2022 at 03:13:12PM +0900, Masahiro Yamada wrote:
> > The objects placed at the head of vmlinux need special treatments:
> >
> >  - arch/$(SRCARCH)/Makefile adds them to head-y in order to place
> >    them before other archives in the linker command line.
> >
> >  - arch/$(SRCARCH)/kernel/Makefile adds them to extra-y instead of
> >    obj-y to avoid them going into built-in.a.
> >
> > This commit gets rid of the latter.
> >
> > Create vmlinux.a to collect all the objects that are unconditionally
> > linked to vmlinux. The objects listed in head-y are moved to the head
> > of vmlinux.a by using 'ar m'.
> >
> > With this, arch/$(SRCARCH)/kernel/Makefile can consistently use obj-y
> > for builtin objects.
> >
> > There is no *.o that is directly linked to vmlinux. Drop unneeded code
> > in scripts/clang-tools/gen_compile_commands.py.
> >
> > Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> > Reviewed-by: Geert Uytterhoeven <geert@...ux-m68k.org>

Where does this R-b come from? It was not present in Yamada-san's
posting. Added by b4?

> The following build failure is seen when building m68k:defconfig in
> next-20220919.

[...]

> # first bad commit: [6676e2cdd7c339dc40331faccbaac1112d2c1d78] kbuild: use obj-y instead extra-y for objects placed at the head

I did provide my R-b on Yamada-san's fix for this issue, which was
sent later in this thread.

Gr{oetje,eeting}s,

                        Geert

--
Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@...ux-m68k.org

In personal conversations with technical people, I call myself a hacker. But
when I'm talking to journalists I just say "programmer" or something like that.
                                -- Linus Torvalds