linux-kernel - Re: [PATCH v5 03/13] kbuild: Raise the minimum required binutils version to 2.21

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Date:   Fri, 1 Feb 2019 18:45:44 -0800
From:   Andy Lutomirski <luto@...nel.org>
To:     "Chang S. Bae" <chang.seok.bae@...el.com>,
        Andrew Morton <akpm@...ux-foundation.org>
Cc:     Andy Lutomirski <luto@...nel.org>,
        Thomas Gleixner <tglx@...utronix.de>,
        Ingo Molnar <mingo@...nel.org>,
        "H . Peter Anvin" <hpa@...or.com>, Andi Kleen <ak@...ux.intel.com>,
        Markus T Metzger <markus.t.metzger@...el.com>,
        Ravi Shankar <ravi.v.shankar@...el.com>,
        LKML <linux-kernel@...r.kernel.org>,
        Linux Torvalds <torvalds@...ux-foundation.org>
Subject: Re: [PATCH v5 03/13] kbuild: Raise the minimum required binutils
 version to 2.21

On Fri, Feb 1, 2019 at 12:54 PM Chang S. Bae <chang.seok.bae@...el.com> wrote:
>
> It helps to use some new instructions directly in inline assembly.

akpm, can you ack this patch?  AFAIK you are the only, or at least
most vocal, user of ancient userspace to build new kernels.  Are you
okay with this?

>
> Suggested-by: Andi Kleen <ak@...ux.intel.com>
> Signed-off-by: Chang S. Bae <chang.seok.bae@...el.com>
> Cc: Andy Lutomirski <luto@...nel.org>
> Cc: Linux Torvalds <torvalds@...ux-foundation.org>
> Cc: Thomas Gleixner <tglx@...utronix.de>
> Cc: Ingo Molnar <mingo@...nel.org>
> Cc: H. Peter Anvin <hpa@...or.com>
> ---
>  Documentation/process/changes.rst | 6 ++----
>  1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst
> index 18735dc460a0..0a18075c485e 100644
> --- a/Documentation/process/changes.rst
> +++ b/Documentation/process/changes.rst
> @@ -31,7 +31,7 @@ you probably needn't concern yourself with isdn4k-utils.
>  ====================== ===============  ========================================
>  GNU C                  4.6              gcc --version
>  GNU make               3.81             make --version
> -binutils               2.20             ld -v
> +binutils               2.21             ld -v
>  flex                   2.5.35           flex --version
>  bison                  2.0              bison --version
>  util-linux             2.10o            fdformat --version
> @@ -77,9 +77,7 @@ You will need GNU make 3.81 or later to build the kernel.
>  Binutils
>  --------
>
> -The build system has, as of 4.13, switched to using thin archives (`ar T`)
> -rather than incremental linking (`ld -r`) for built-in.a intermediate steps.
> -This requires binutils 2.20 or newer.
> +Binutils 2.21 or newer is needed to build the kernel.
>
>  pkg-config
>  ----------
> --
> 2.19.1
>