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

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Message-ID: <20190405163015.3t4r7lzywxjsgg4n@vega.skynet.aixah.de>
Date:   Fri, 5 Apr 2019 18:30:15 +0200
From:   Luis Ressel <aranea@...ah.de>
To:     Josh Poimboeuf <jpoimboe@...hat.com>
Cc:     Peter Zijlstra <peterz@...radead.org>,
        open list <linux-kernel@...r.kernel.org>,
        stable@...r.kernel.org
Subject: Re: [PATCH] objtool: Don't use -Werror

On Fri, Apr 05, 2019 at 11:15:41AM -0500, Josh Poimboeuf wrote:
> I consider that a good thing, because I *want* the build to be broken
> when somebody uses a bad version of libelf.  A patch to produce a more
> useful error message (e.g., "bad version of libelf") would be welcome of
> course.

Do that if you must, but please do it properly (i.e. check the libelf
version and error out explicitly with a suitable message, instead of
relying on -Werror), and don't backport the change to stable kernels.

The patch which I referenced in my commit message suddently broke the
build for me between 4.19.32 and .33; I consider that a regression which
ought to be fixed.

Regards,
Luis