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Date:   Fri, 15 Apr 2022 17:26:33 +0200
From:   Peter Zijlstra <peterz@infradead.org>
To:     x86@kernel.org, Josh Poimboeuf <jpoimboe@redhat.com>
Cc:     hjl.tools@gmail.com, ndesaulniers@google.com, mbenes@suse.cz,
        rostedt@goodmis.org, linux-toolchains@vger.kernel.org
Subject: Re: The trouble with __weak and objtool got worse
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On Fri, Apr 15, 2022 at 01:19:04PM +0200, Peter Zijlstra wrote:
> Alternatively:
> 
>   https://sourceware.org/pipermail/binutils/2020-December/114671.html
> 
> seems to suggest: -Wa,--generate-unused-section-symbols=yes, ought to
> work, except I'm getting:
> 
> $ gcc -O2 -fcf-protection=none -fno-asynchronous-unwind-tables -Wa,--generate-unused-section-symbols=yes -c foo*.c
> as: unrecognized option '--generate-unused-section-symbols=yes'
> as: unrecognized option '--generate-unused-section-symbols=yes'

Reading so hard...

 $ gcc -O2 -fcf-protection=none -fno-asynchronous-unwind-tables -Wa,-generate-unused-section-symbols=yes -c foo*.c

seems to actually work.