linux-kernel - Re: [PATCH] kbuild: remove AS variable

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Date:   Tue, 24 Mar 2020 12:43:46 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        "David S . Miller" <davem@...emloft.net>,
        Network Development <netdev@...r.kernel.org>,
        LKML <linux-kernel@...r.kernel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        clang-built-linux <clang-built-linux@...glegroups.com>
Subject: Re: [PATCH] kbuild: remove AS variable

Just noting that this got rolled up into a 3 patch series:
https://lore.kernel.org/lkml/CAKwvOdkjiyyt8Ju2j2O4cm1sB34rb_FTgjCRzEiXM6KL4muO_w@mail.gmail.com/T/#u

On Tue, Mar 24, 2020 at 9:15 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> As commit 5ef872636ca7 ("kbuild: get rid of misleading $(AS) from
> documents") noted, we rarely use $(AS) in the kernel build.
>
> Now that the only/last user of $(AS) in drivers/net/wan/Makefile was
> converted to $(CC), $(AS) is no longer used in the build process.
>
> You can still pass in AS=clang, which is just a switch to turn on
> the LLVM integrated assembler.
>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
>
>  Makefile | 3 +--
>  1 file changed, 1 insertion(+), 2 deletions(-)
>
> diff --git a/Makefile b/Makefile
> index 16d8271192d1..339e8c51a10b 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -405,7 +405,6 @@ KBUILD_HOSTLDFLAGS  := $(HOST_LFS_LDFLAGS) $(HOSTLDFLAGS)
>  KBUILD_HOSTLDLIBS   := $(HOST_LFS_LIBS) $(HOSTLDLIBS)
>
>  # Make variables (CC, etc...)
> -AS             = $(CROSS_COMPILE)as
>  LD             = $(CROSS_COMPILE)ld
>  CC             = $(CROSS_COMPILE)gcc
>  CPP            = $(CC) -E
> @@ -472,7 +471,7 @@ KBUILD_LDFLAGS :=
>  GCC_PLUGINS_CFLAGS :=
>  CLANG_FLAGS :=
>
> -export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE AS LD CC
> +export ARCH SRCARCH CONFIG_SHELL BASH HOSTCC KBUILD_HOSTCFLAGS CROSS_COMPILE LD CC
>  export CPP AR NM STRIP OBJCOPY OBJDUMP OBJSIZE READELF PAHOLE LEX YACC AWK INSTALLKERNEL
>  export PERL PYTHON PYTHON3 CHECK CHECKFLAGS MAKE UTS_MACHINE HOSTCXX
>  export KBUILD_HOSTCXXFLAGS KBUILD_HOSTLDFLAGS KBUILD_HOSTLDLIBS LDFLAGS_MODULE
> --
> 2.17.1
>
> --
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-- 
Thanks,
~Nick Desaulniers