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

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Message-ID: <CAK7LNAQb2pCtFgebADigYoRJUo4M3i_4iwS=88QYZx5H+736Hw@mail.gmail.com>
Date:   Wed, 10 Mar 2021 02:09:02 +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 12:34 PM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> 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:


I did not get v2, but never mind.
I locally modified the code and applied.

I added Link: to your original patch
just in case I make some mistake in the
code refactoring.


The final one looks as follows:





commit 0b2813ba7b0f0a9ff273177e85cbc93d92e76212
Author: Bernhard Rosenkränzer <bero@...dev.ch>
Date:   Tue Mar 2 23:12:11 2021 +0100

    kbuild: Fix ld-version.sh script if LLD was built with LLD_VENDOR

    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.

    Link: https://lore.kernel.org/lkml/20210302221211.1620858-1-bero@lindev.ch/
    Signed-off-by: Bernhard Rosenkränzer <bero@...dev.ch>
    [masahiro yamada: refactor the code]
    Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>

diff --git a/scripts/ld-version.sh b/scripts/ld-version.sh
index a463273509b5..30debf78aa09 100755
--- a/scripts/ld-version.sh
+++ b/scripts/ld-version.sh
@@ -44,14 +44,20 @@ if [ "$1" = GNU -a "$2" = ld ]; then
 elif [ "$1" = GNU -a "$2" = gold ]; then
        echo "gold linker is not supported as it is not capable of
linking the kernel proper." >&2
        exit 1
-elif [ "$1" = LLD ]; then
-       version=$2
-       min_version=$lld_min_version
-       name=LLD
-       disp_name=LLD
 else
-       echo "$orig_args: unknown linker" >&2
-       exit 1
+       while [ $# -gt 1 -a "$1" != "LLD" ]; do
+               shift
+       done
+
+       if [ "$1" = LLD ]; then
+               version=$2
+               min_version=$lld_min_version
+               name=LLD
+               disp_name=LLD
+       else
+               echo "$orig_args: unknown linker" >&2
+               exit 1
+       fi
 fi

 # Some distributions append a package release number, as in 2.34-4.fc32




--
Best Regards
Masahiro Yamada