linux-kernel - Re: [PATCH v2 1/2] Makefile: Export clang toolchain variables

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Message-ID: <CAKwvOdnBMFYXvS+GH0cUiczgkpLWtBinPRjkTJBQGrKjxktUUg@mail.gmail.com>
Date:   Mon, 12 Nov 2018 10:55:53 -0800
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     joel@....id.au
Cc:     Masahiro Yamada <yamada.masahiro@...ionext.com>,
        mpe@...erman.id.au, Michal Marek <michal.lkml@...kovi.net>,
        dja@...ens.net,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        linuxppc-dev@...ts.ozlabs.org
Subject: Re: [PATCH v2 1/2] Makefile: Export clang toolchain variables

On Sun, Nov 11, 2018 at 8:21 PM Joel Stanley <joel@....id.au> wrote:
>
> The powerpc makefile will use these in it's boot wrapper.
>
> Signed-off-by: Joel Stanley <joel@....id.au>
> ---
>  Makefile | 1 +
>  1 file changed, 1 insertion(+)
>
> diff --git a/Makefile b/Makefile
> index 09278330282d..840efe6eb54c 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -495,6 +495,7 @@ endif
>  ifneq ($(GCC_TOOLCHAIN),)
>  CLANG_FLAGS    += --gcc-toolchain=$(GCC_TOOLCHAIN)
>  endif
> +export CLANG_FLAGS
>  CLANG_FLAGS    += -no-integrated-as

Does this export CLANG_FLAGS before `-no-integrated-as` is set?
Either way, I think it would be clearer to export this after all the
relevant flags are set.

>  KBUILD_CFLAGS  += $(CLANG_FLAGS)
>  KBUILD_AFLAGS  += $(CLANG_FLAGS)
> --
> 2.19.1
>


-- 
Thanks,
~Nick Desaulniers