linux-kernel - Re: [PATCH v2 2/4] kbuild: Add hostcc-option macro

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Date:   Wed, 14 Jun 2017 09:26:46 +0200
From:   Arnd Bergmann <arnd@...db.de>
To:     Matthias Kaehlcke <mka@...omium.org>
Cc:     Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...hat.com>,
        "H . Peter Anvin" <hpa@...or.com>,
        "H . J . Lu" <hjl.tools@...il.com>,
        David Woodhouse <dwmw2@...radead.org>,
        Masahiro Yamada <yamada.masahiro@...ionext.com>,
        Michal Marek <mmarek@...e.com>,
        "the arch/x86 maintainers" <x86@...nel.org>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Michael Davidson <md@...gle.com>,
        Greg Hackmann <ghackmann@...gle.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Stephen Hines <srhines@...gle.com>,
        Kees Cook <keescook@...omium.org>,
        Bernhard Rosenkränzer 
        <Bernhard.Rosenkranzer@...aro.org>,
        Peter Foley <pefoley2@...oley.com>,
        Behan Webster <behanw@...verseincode.com>,
        Douglas Anderson <dianders@...omium.org>
Subject: Re: [PATCH v2 2/4] kbuild: Add hostcc-option macro

On Wed, Jun 14, 2017 at 1:08 AM, Matthias Kaehlcke <mka@...omium.org> wrote:
> hostcc-option is equivalent to cc-option, but uses the host compiler
> and HOSTCFLAGS. Change HOSTCFLAGS to a simple expanded variable to
> allow for HOSTCFLAGS += $(call hostcc-option, ...).
>
> Suggested-by: Arnd Bergmann <arnd@...db.de>
> Suggested-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Signed-off-by: Matthias Kaehlcke <mka@...omium.org>

Actually, we already have a hostcc-option macro. What I meant with my suggestion
was that we could redefine the existing one using cc-option-raw.

I checked again now and found that while this was added in 2016 by
Emese Revfy, we apparently don't have any users of the helper in the
kernel.

      Arnd