linux-kernel - RE: [PATCH] objtool: Don't use -Werror

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Date:   Fri, 5 Apr 2019 16:35:50 +0000
From:   David Laight <David.Laight@...LAB.COM>
To:     'Josh Poimboeuf' <jpoimboe@...hat.com>
CC:     'Luis Ressel' <aranea@...ah.de>,
        Peter Zijlstra <peterz@...radead.org>,
        open list <linux-kernel@...r.kernel.org>,
        "stable@...r.kernel.org" <stable@...r.kernel.org>
Subject: RE: [PATCH] objtool: Don't use -Werror

From: Josh Poimboeuf
> Sent: 05 April 2019 17:21
..
> > FWIW I had to update libelf.so from version 0.153 to 0.165 in
> > order for the amd64 orc unwinder code in objtool to not generate
> > corrupt output files.
> > That is an Ubuntu 13.04 system - nothing like 10 years old.
> 
> Ah.  It would be great if we had a patch to fail the build for old
> versions of elfutils-libelf as well.

I think the check I added for that specific error got committed.
Look at the defintion of cmd_objtool in scripts/Makefile.build.

Although I seem to have a local change to the definition of
cmd_modversions_c.
It might be that the version of a change I made that got committed
is missing an extra $ when processing the saved output from 'objdump -h'.
It used to just pipe into grep - so lost the error result from objdump.

	David

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