Re: [PATCH] doc: use KCFLAGS instead of EXTRA_CFLAGS to pass flags from command line

[Federico Vaga]

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@xxxxxxxxxx>
> ---
>
>  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@xxxxxxxxxx>

--
Federico Vaga
http://www.federicovaga.it/