Subject: Re: [PATCH v2 1/4] kbuild: Add cc-option-raw macro
To: Arnd Bergmann <arnd@arndb.de>,
        Masahiro Yamada <yamada.masahiro@socionext.com>
References: <20170613230854.112282-1-mka@chromium.org>
 <20170613230854.112282-2-mka@chromium.org>
 <CAK7LNAQ5zNgKLEfij_Ch1KyuFnK=6XudqDekJkXF=3uRZkEZuA@mail.gmail.com>
 <CAK8P3a0mdWAOLrEStcVLka-XAWMmyypPwZT5nSJB2gFvyxOLAQ@mail.gmail.com>
Cc: Matthias Kaehlcke <mka@chromium.org>,
        Thomas Gleixner <tglx@linutronix.de>, Ingo Molnar <mingo@redhat.com>,
        "H . Peter Anvin" <hpa@zytor.com>, "H . J . Lu" <hjl.tools@gmail.com>,
        David Woodhouse <dwmw2@infradead.org>, X86 ML <x86@kernel.org>,
        Linux Kbuild mailing list <linux-kbuild@vger.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Michael Davidson <md@google.com>, Greg Hackmann <ghackmann@google.com>,
        Nick Desaulniers <ndesaulniers@google.com>,
        Stephen Hines <srhines@google.com>, Kees Cook <keescook@chromium.org>,
        =?UTF-8?Q?Bernhard_Rosenkr=c3=a4nzer?= 
        <Bernhard.Rosenkranzer@linaro.org>,
        Peter Foley <pefoley2@pefoley.com>,
        Behan Webster <behanw@converseincode.com>,
        Douglas Anderson <dianders@chromium.org>
From: Michal Marek <mmarek@suse.com>
Message-ID: <fd23743c-93a1-a5e2-dd70-c46b07032cfd@suse.com>
Date: Wed, 14 Jun 2017 10:32:20 +0200
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Dne 14.6.2017 v 09:31 Arnd Bergmann napsal(a):
> On Wed, Jun 14, 2017 at 3:27 AM, Masahiro Yamada
> <yamada.masahiro@socionext.com> wrote:
>> 2017-06-14 8:08 GMT+09:00 Matthias Kaehlcke <mka@chromium.org>:
>>> cc-option uses KBUILD_CFLAGS and KBUILD_CPPFLAGS when it determines
>>> whether an option is supported or not. This is fine for options used to
>>> build the kernel itself, however some components like the x86 boot code
>>> use a different set of flags.
>>>
>>> Add the new macro cc-option-raw which serves the same purpose as
>>> cc-option but has additional parameters. One parameter is the compiler
>>> with which the check should be performed, the other the compiler options
>>> to be used instead KBUILD_C*FLAGS. The compiler parameter allows other
>>> macros like hostcc-option to be implemented on top of cc-option-raw.
>>>
>>> Also rework cc-option to make use of cc-option-raw.
>>>
>>> Suggested-by: Arnd Bergmann <arnd@arndb.de>
>>> Suggested-by: Masahiro Yamada <yamada.masahiro@socionext.com>
>>> Signed-off-by: Matthias Kaehlcke <mka@chromium.org>
>>> ---
>>> Changes in v2:
>>> - Changed macro name from Add cc-option-no-kbuild to cc-option-raw
>>> - Added compiler as parameter to the macro
>>> - Reworked cc-option to make use of cc-option-raw
>>> - Updated commit message
>>>
>>>  scripts/Kbuild.include | 9 +++++++--
>>>  1 file changed, 7 insertions(+), 2 deletions(-)
>>>
>>
>> Acked-by: Masahiro Yamada <yamada.masahiro@socionext.com>
>> (if nothing better pops up)
> 
> Acked-by: Arnd Bergmann <arnd@arndb.de>

Acked-by: Michal Marek <mmarek@suse.com>


> Regarding the naming, __cc-option might be better than cc-option-raw,
> but the current version is fine too.

I have no strong opinion either way :).

Michal