linux-kernel - Re: [PATCH v4 1/3] kbuild: allow symbol whitelisting with TRIM_UNUSED

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Message-ID: <nycvar.YSQ.7.76.2002171059230.1559@knanqh.ubzr>
Date:   Mon, 17 Feb 2020 11:00:39 -0500 (EST)
From:   Nicolas Pitre <nico@...xnic.net>
To:     Quentin Perret <qperret@...gle.com>
cc:     Matthias Maennich <maennich@...gle.com>, masahiroy@...nel.org,
        linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org,
        kernel-team@...roid.com, jeyu@...nel.org, hch@...radead.org
Subject: Re: [PATCH v4 1/3] kbuild: allow symbol whitelisting with
 TRIM_UNUSED_KSYMS

On Mon, 17 Feb 2020, Quentin Perret wrote:

> On Monday 17 Feb 2020 at 15:22:01 (+0000), Matthias Maennich wrote:
> > In case the whitelist file can't be found, the error message is
> > 
> >  cat: path/to/file: file not found
> > 
> > I wonder whether we can make this error message a bit more specific by
> > telling the user that the KSYMS_WHITELIST is missing.
> 
> +1, that'd be really useful. I'll check the file existence in v5 (in a
> POSIX-compliant way, I promise).

In fact, if you explicitly provide a file that is not there, then this 
is arguably a good reason to even fail the build.


Nicolas