linux-kernel - Re: [PATCH] kbuild: move cc-option and cc-disable-warning after incl. arch Makefile

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Date:   Mon, 27 Nov 2017 13:25:24 +0100
From:   Geert Uytterhoeven <geert@...ux-m68k.org>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
Cc:     linux-kbuild <linux-kbuild@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: [PATCH] kbuild: move cc-option and cc-disable-warning after incl.
 arch Makefile

Hi Yamada-san,

On Mon, Nov 27, 2017 at 1:15 PM, Masahiro Yamada
<yamada.masahiro@...ionext.com> wrote:
> Geert reported commit ae6b289a3789 ("kbuild: Set KBUILD_CFLAGS before
> incl. arch Makefile") broke cross-compilation using a cross-compiler
> that supports less compiler options than the host compiler.
>
> For example,
>
>   cc1: error: unrecognized command line option "-Wno-unused-but-set-variable"
>
> This problem happens on architectures that setup CROSS_COMPILE in their
> arch/*/Makefile.
>
> Move the cc-option and cc-disable-warning back to the original position,
> but keep the Clang target options.
>
> Fixes: ae6b289a3789 ("kbuild: Set KBUILD_CFLAGS before incl. arch Makefile")
> Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>

Thanks for the quick response!

Tested-by: Geert Uytterhoeven <geert@...ux-m68k.org>

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