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Date:   Tue, 08 Oct 2019 08:07:09 +0000
To:     Andreas Schwab <schwab@linux-m68k.org>
From:   Dmitry Goldin <dgoldin@protonmail.ch>
Cc:     Greg KH <gregkh@linuxfoundation.org>,
        Masahiro Yamada <yamada.masahiro@socionext.com>,
        "linux-kernel\\@vger.kernel.org" <linux-kernel@vger.kernel.org>,
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        Ben Hutchings <ben@decadent.org.uk>
Reply-To: Dmitry Goldin <dgoldin@protonmail.ch>
Subject: Re: [PATCH v2] kheaders: making headers archive reproducible
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Hi,

=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90 Original Me=
ssage =E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90=E2=80=90
On Monday, October 7, 2019 2:26 PM, Andreas Schwab <schwab@linux-m68k.org> =
wrote:

> On Okt 07 2019, Greg KH gregkh@linuxfoundation.org wrote:
>
> > On Mon, Oct 07, 2019 at 01:49:47PM +0200, Andreas Schwab wrote:
> >
> > > GEN kernel/kheaders_data.tar.xz
> > > tar: unrecognized option '--sort=3Dname'
> > > Try `tar --help' or`tar --usage' for more information.
> > > make[2]: *** [kernel/kheaders_data.tar.xz] Error 64
> > > make[1]: *** [kernel] Error 2
> > > make: *** [sub-make] Error 2
> > > $ tar --version
> > > tar (GNU tar) 1.26
> > > Copyright (C) 2011 Free Software Foundation, Inc.
> >
> > Wow that's an old version of tar. 2011? What happens if you use a more
> > modern one?
>
> That's the most modern I have available on that machine.

Hmm. --sort was introduced in 1.28 in 2014. Do you think it would warrant s=
ome sort of version check and fallback or is this something we can expect t=
he user to handle if their distribution happens to not ship anything more r=
ecent? A few sensible workarounds come to mind.

In any case, likely it would make sense to at least update to https://githu=
b.com/torvalds/linux/blob/master/Documentation/process/changes.rst with the=
 minimal version we decide on.


Dmitry