linux-kernel - Re: [PATCH] Fix ld-version.sh script if LLD was built with LLD

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Date:   Thu, 4 Mar 2021 12:34:59 +0900
From:   Masahiro Yamada <masahiroy@...nel.org>
To:     Bernhard Rosenkränzer <bero@...dev.ch>
Cc:     Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        Nathan Chancellor <natechancellor@...il.com>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>
Subject: Re: [PATCH] Fix ld-version.sh script if LLD was built with LLD_VENDOR

On Thu, Mar 4, 2021 at 9:18 AM Bernhard Rosenkränzer <bero@...dev.ch> wrote:
>
> If LLD was built with -DLLD_VENDOR="xyz", ld.lld --version output
> will prefix LLD_VENDOR. Since LLD_VENDOR can contain spaces, the
> LLD identifier isn't guaranteed to be $2 either.
>
> Adjust the version checker to handle such versions of lld.
>
> Signed-off-by: Bernhard Rosenkränzer <bero@...dev.ch>
> ---


Bernhard,

Could you senv v2
with the suggested code change?

Please make sure to add
linux-kbuild@...r.kernel.org
in the To:







>  scripts/ld-version.sh | 12 ++++++++++++
>  1 file changed, 12 insertions(+)
>
> diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh
> index a463273509b5..4c042a306e22 100755
> --- a/scripts/ld-version.sh
> +++ b/scripts/ld-version.sh
> @@ -49,6 +49,18 @@ elif [ "$1" = LLD ]; then
>         min_version=$lld_min_version
>         name=LLD
>         disp_name=LLD
> +elif echo "$@" |grep -q ' LLD '; then
> +       # if LLD was built with -DLLD_VENDOR="xyz", it ld.lld --version
> +       # says "xyz LLD [...]". Since LLD_VENDOR may contain spaces, we
> +       # don't know the exact position of "LLD" and the version info
> +       # at this point
> +       while [ "$1" != "LLD" ]; do
> +               shift
> +       done
> +       version=$2
> +       min_version=$lld_min_version
> +       name=LLD
> +       disp_name=LLD
>  else
>         echo "$orig_args: unknown linker" >&2
>         exit 1
> --
> 2.30.1
>


-- 
Best Regards
Masahiro Yamada