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Message-ID: <d3f3b273ff2ac78e5cecc10789ffd2da@vaga.pv.it>
Date: Mon, 22 Feb 2021 13:13:30 +0100
From: Federico Vaga <federico.vaga@...a.pv.it>
To: Masahiro Yamada <masahiroy@...nel.org>
Cc: Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org,
Alex Shi <alex.shi@...ux.alibaba.com>,
Daniel Vetter <daniel@...ll.ch>,
David Airlie <airlied@...ux.ie>,
Harry Wei <harryxiyou@...il.com>, Jyri Sarha <jsarha@...com>,
Tomi Valkeinen <tomi.valkeinen@...com>,
dri-devel@...ts.freedesktop.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] doc: use KCFLAGS instead of EXTRA_CFLAGS to pass flags
from command line
On 2021-02-21 16:25, Masahiro Yamada wrote:
> You should use KCFLAGS to pass additional compiler flags from the
> command line. Using EXTRA_CFLAGS is wrong.
>
> EXTRA_CFLAGS is supposed to specify flags applied only to the current
> Makefile (and now deprecated in favor of ccflags-y).
>
> It is still used in arch/mips/kvm/Makefile (and possibly in external
> modules too). Passing EXTRA_CFLAGS from the command line overwrites
> it and breaks the build.
>
> I also fixed drivers/gpu/drm/tilcdc/Makefile because commit
> 816175dd1fd7
> ("drivers/gpu/drm/tilcdc: Makefile, only -Werror when no -W* in
> EXTRA_CFLAGS") was based on the same misunderstanding.
>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
>
> Documentation/process/4.Coding.rst | 2 +-
> Documentation/process/submit-checklist.rst | 2 +-
> Documentation/translations/it_IT/process/4.Coding.rst | 2 +-
> Documentation/translations/it_IT/process/submit-checklist.rst | 2 +-
> Documentation/translations/zh_CN/process/4.Coding.rst | 2 +-
> drivers/gpu/drm/tilcdc/Makefile | 2 +-
> 6 files changed, 6 insertions(+), 6 deletions(-)
Acked-by: Federico Vaga <federico.vaga@...a.pv.it>
--
Federico Vaga
http://www.federicovaga.it/
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