linux-kernel - Re: [PATCH v2 1/2] kbuild: replace cc-name test with CONFIG_CC_IS

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Date:   Tue, 30 Oct 2018 16:51:58 +0000
From:   Paul Burton <paul.burton@...s.com>
To:     Masahiro Yamada <yamada.masahiro@...ionext.com>
CC:     "linux-kbuild@...r.kernel.org" <linux-kbuild@...r.kernel.org>,
        "linux-mips@...ux-mips.org" <linux-mips@...ux-mips.org>,
        James Hogan <jhogan@...nel.org>,
        Michael Ellerman <mpe@...erman.id.au>,
        Benjamin Herrenschmidt <benh@...nel.crashing.org>,
        "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Paul Mackerras <paulus@...ba.org>,
        Ralf Baechle <ralf@...ux-mips.org>,
        "linuxppc-dev@...ts.ozlabs.org" <linuxppc-dev@...ts.ozlabs.org>
Subject: Re: [PATCH v2 1/2] kbuild: replace cc-name test with
 CONFIG_CC_IS_CLANG

Hi Masahiro,

On Tue, Oct 30, 2018 at 10:26:33PM +0900, Masahiro Yamada wrote:
> Evaluating cc-name invokes the compiler every time even when you are
> not compiling anything, like 'make help'. This is not efficient.
> 
> The compiler type has been already detected in the Kconfig stage.
> Use CONFIG_CC_IS_CLANG, instead.
> 
> Signed-off-by: Masahiro Yamada <yamada.masahiro@...ionext.com>
> Acked-by: Michael Ellerman <mpe@...erman.id.au> (powerpc)

Looks good to me:

    Acked-by: Paul Burton <paul.burton@...s.com> (MIPS)

Thanks,
    Paul