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From:   Masahiro Yamada <yamada.masahiro@socionext.com>
Date:   Tue, 13 Feb 2018 10:41:10 +0900
Message-ID: <CAK7LNAREEJ_k9x2QXaT73nBg934pb9YvO9DfzhhU7+_fpDdH8g@mail.gmail.com>
Subject: Re: [RFC PATCH 4/7] kconfig: support new special property shell=
To:     Randy Dunlap <rdunlap@infradead.org>
Cc:     Kees Cook <keescook@chromium.org>,
        Ulf Magnusson <ulfalizer@gmail.com>,
        Linus Torvalds <torvalds@linux-foundation.org>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Greg Kroah-Hartman <gregkh@linuxfoundation.org>,
        Andrew Morton <akpm@linux-foundation.org>,
        Nicolas Pitre <nicolas.pitre@linaro.org>,
        "Luis R . Rodriguez" <mcgrof@suse.com>,
        Sam Ravnborg <sam@ravnborg.org>,
        Michal Marek <michal.lkml@markovi.net>,
        Martin Schwidefsky <schwidefsky@de.ibm.com>,
        Pavel Machek <pavel@ucw.cz>,
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        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Tejun Heo <tj@kernel.org>, Ingo Molnar <mingo@kernel.org>,
        "Van De Ven, Arjan" <arjan.van.de.ven@intel.com>,
        Arnd Bergmann <arnd@arndb.de>
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2018-02-13 8:48 GMT+09:00 Randy Dunlap <rdunlap@infradead.org>:
> On 02/12/2018 07:24 AM, Kees Cook wrote:
>> On Mon, Feb 12, 2018 at 6:39 AM, Masahiro Yamada
>> <yamada.masahiro@socionext.com> wrote:
>
>>>> (And in thinking about this, does Kconfig know the true $CC in use?
>>>> i.e. the configured cross compiler, etc?)
>>>
>>> I was thinking of removing CONFIG_CROSS_COMPILE.
>>>
>>> A user can dynamically change CROSS_COMPILE from
>>> "make menuconfig".
>>
>> Most builds I've seen implement cross compilers as an environment
>> variable during all "make" invocations.
>
> I agree. I think you would break a bunch of build bots if you remove that.


For clarification, I suggested to remove CONFIG_CROSS_COMPILE.

The following code:
https://github.com/torvalds/linux/blob/v4.16-rc1/Makefile#L315
https://github.com/torvalds/linux/blob/v4.16-rc1/init/Kconfig#L58

I hope build bots are not using this.


Passing CROSS_COMPILE via the command line, environment
is still supported.


-- 
Best Regards
Masahiro Yamada