linux-kernel - Re: [PATCH] kbuild: fix endless syncconfig in case arch Makefile sets CROSS

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Message-ID: <CAK7LNATYmFiCgB8jxOxKtPxjMeVqgXOspE+72B4=uLmuLSyyjw@mail.gmail.com>
Date:   Sat, 9 Jun 2018 20:36:56 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Geert Uytterhoeven <geert@...ux-m68k.org>
Cc:     linux-kbuild <linux-kbuild@...r.kernel.org>,
        linux-m68k <linux-m68k@...ts.linux-m68k.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nicholas Piggin <npiggin@...il.com>,
        Ulf Magnusson <ulfalizer@...il.com>,
        Sam Ravnborg <sam@...nborg.org>,
        Michal Marek <michal.lkml@...kovi.net>
Subject: Re: [PATCH] kbuild: fix endless syncconfig in case arch Makefile sets CROSS_COMPILE

2018-06-08 17:20 GMT+09:00 Geert Uytterhoeven <geert@...ux-m68k.org>:
> Hi Yamada-san,
>
> On Fri, Jun 8, 2018 at 2:21 AM, Masahiro Yamada
> <yamada.masahiro@...ionext.com> wrote:
>> Commit 21c54b774744 ("kconfig: show compiler version text in the top
>> comment") was intended to detect the compiler upgrade, but Geert
>> reported a breakage on the m68k build.
>>
>> The compiler upgrade is detected by the change of the environment
>> variable, CC_VERSION_TEXT, which contains the first line of the output
>> from $(CC) --version.  Currently, this works well when CROSS_COMPILE
>> is given via the environment variable or the Make command line.
>>
>> However, some architectures such as m68k can specify CROSS_COMPILE
>> from arch/$(SRCARCH)/Makefile as well.  In this case, "make ARCH=m68k"
>> ends up with endless syncconfig loop.
>>
>>   $ make ARCH=m68k defconfig
>>   *** Default configuration is based on 'multi_defconfig'
>>   #
>>   # configuration written to .config
>>   #
>>   $ make ARCH=m68k
>>   scripts/kconfig/conf  --syncconfig Kconfig
>>   scripts/kconfig/conf  --syncconfig Kconfig
>>   scripts/kconfig/conf  --syncconfig Kconfig
>>   scripts/kconfig/conf  --syncconfig Kconfig
>
> [...]
>
>> Fixes: 21c54b774744 ("kconfig: show compiler version text in the top comment")
>> Reported-by: Geert Uytterhoeven <geert@...ux-m68k.org>
>> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
>
> Thanks for fixing this quickly!
>
> Tested-by: Geert Uytterhoeven <geert@...ux-m68k.org>


Applied to linux-kbuild.



-- 
Best Regards
Masahiro Yamada