Received-SPF: pass (google.com: best guess record for domain of linux-kernel-owner@vger.kernel.org designates 209.132.180.67 as permitted sender) client-ip=209.132.180.67;
MIME-Version: 1.0
In-Reply-To: <20180301111801.gdhoam4kqrbqnasv@huvuddator>
References: <1519776926-30459-1-git-send-email-yamada.masahiro@socionext.com>
 <1519776926-30459-6-git-send-email-yamada.masahiro@socionext.com>
 <20180228051525.a2vouqs6djnd2cnf@huvuddator> <CAK7LNATWRmYf7nfGcFiGe2DF2PSkE9mrS51GytzWEz5DYToN0w@mail.gmail.com>
 <20180301111801.gdhoam4kqrbqnasv@huvuddator>
From:   Masahiro Yamada <yamada.masahiro@socionext.com>
Date:   Thu, 1 Mar 2018 23:39:27 +0900
Message-ID: <CAK7LNATrMVvjurGBLvCHH_5Vio_Xm83h8yaiLQPU0VUUvQLCuQ@mail.gmail.com>
Subject: Re: [PATCH] kconfig: remove redundant streamline_config.pl prerequisite
To:     Ulf Magnusson <ulfalizer@gmail.com>
Cc:     Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Marc Herbert <marc.herbert@intel.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>
Content-Type: text/plain; charset="UTF-8"
Sender: linux-kernel-owner@vger.kernel.org
Precedence: bulk

2018-03-01 20:18 GMT+09:00 Ulf Magnusson <ulfalizer@gmail.com>:
> The local{yes,mod}config targets currently have streamline_config.pl as
> a prerequisite. This is redundant, because streamline_config.pl is a
> checked-in file with no prerequisites.
>
> Remove the prerequisite and reference streamline_config.pl directly in
> the recipe of the rule instead.
>
> Signed-off-by: Ulf Magnusson <ulfalizer@gmail.com>
> ---
>  scripts/kconfig/Makefile | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/scripts/kconfig/Makefile b/scripts/kconfig/Makefile
> index 1f74336d4e23..58be52cb464d 100644


Thanks! Almost good.

Just small nits.


> --- a/scripts/kconfig/Makefile
> +++ b/scripts/kconfig/Makefile
> @@ -77,9 +77,9 @@ silentoldconfig: $(obj)/conf
>             touch   include/generated/autoksyms.h
>         $< $(silent) --$@ $(Kconfig)
>
> -localyesconfig localmodconfig: $(obj)/streamline_config.pl $(obj)/conf
> +localyesconfig localmodconfig: $(obj)/conf
>         $(Q)mkdir -p include/config include/generated
> -       $(Q)perl $< --$@ $(srctree) $(Kconfig) > .tmp.config
> +       $(Q)perl $(obj)/streamline_config.pl --$@ $(srctree) $(Kconfig) > .tmp.config


'$(src)/streamline_config.pl' is better than '$(obj)/streamline_config.pl'
since it is a checked-in file.

'$(src)' and '$(obj)' are always the same.
(https://github.com/torvalds/linux/blob/master/scripts/Makefile.build#L6)


So, there is no effective difference.
It is just a coding convention to use $(obj)/ for generated files,
and $(src)/ for source files.

The original code already used $(obj)/, so this is not your fault
but I want to fix it while we are here.


One more nit.

$(obj)/conf $(silent) --silentoldconfig $(Kconfig);

can be

$< $(silent) --silentoldconfig $(Kconfig);


I guess you did not touch this line to avoid
conflict with my patch.


If you agree those two, shall I fix it up
when I apply it?


>         $(Q)if [ -f .config ]; then                                     \
>                         cmp -s .tmp.config .config ||                   \
>                         (mv -f .config .config.old.1;                   \
> --
> 2.14.1
>
> --
> To unsubscribe from this list: send the line "unsubscribe linux-kbuild" in
> the body of a message to majordomo@vger.kernel.org
> More majordomo info at  http://vger.kernel.org/majordomo-info.html


-- 
Best Regards
Masahiro Yamada