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From:   John Ogness <john.ogness@linutronix.de>
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To:     Michael Ellerman <mpe@ellerman.id.au>,
        Nicholas Piggin <npiggin@gmail.com>
Cc:     linuxppc-dev@lists.ozlabs.org, linux-kernel@vger.kernel.org
Subject: Re: [PATCH] powerpc/build: vdso linker warning for orphan sections
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References: <20230609051002.3342-1-npiggin@gmail.com>
 <871qh6wcgb.fsf@jogness.linutronix.de> <871qh5jrz2.fsf@mail.lhotse>
Date:   Tue, 18 Jul 2023 16:28:36 +0206
Message-ID: <87o7k9l2oj.fsf@jogness.linutronix.de>
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On 2023-07-18, Michael Ellerman <mpe@ellerman.id.au> wrote:
>> ld: warning: discarding dynamic section .rela.opd
>>
>> and bisects to:
>>
>> 8ad57add77d3 ("powerpc/build: vdso linker warning for orphan sections")
>
> Can you test with a newer compiler/binutils?

Testing the Debian release cross compilers/binutils:

Debian 10 / gcc 8.3.0  / ld 2.31.1: generates the warning

Debian 11 / gcc 10.2.1 / ld 2.35.2: generates the warning

Debian 12 / gcc 12.2.0 / ld 2.40:   does _not_ generate the warning

I suppose moving to the newer toolchain is the workaround. Although it
is a bit unusual to require such a modern toolchain in order to build a
kernel without warnings.

John Ogness