linux-kernel - Re: [PATCH 2/2] doc: Add tar requirement to changes.rst

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Message-ID: <ZHZGgvbTGGeYQXGE@bergen.fjasle.eu>
Date:   Tue, 30 May 2023 20:54:58 +0200
From:   Nicolas Schier <nicolas@...sle.eu>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Jonathan Corbet <corbet@....net>, linux-doc@...r.kernel.org
Subject: Re: [PATCH 2/2] doc: Add tar requirement to changes.rst

On Sun 28 May 2023 16:15:02 GMT, Masahiro Yamada wrote:
> On Thu, May 25, 2023 at 5:13 AM Nicolas Schier <nicolas@...sle.eu> 
> wrote:
> >
> > On Sun 21 May 2023 22:23:36 GMT, Masahiro Yamada wrote:
> > > tar is used to build the kernel with CONFIG_IKHEADERS.
> > >
> > > GNU tar 1.28 or later is required.
> > >
> > > Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> > > ---
> > >
> > >  Documentation/process/changes.rst | 7 +++++++
> > >  1 file changed, 7 insertions(+)
> > >
> > > diff --git a/Documentation/process/changes.rst b/Documentation/process/changes.rst
> > > index a9ef00509c9b..3c0074214d75 100644
> > > --- a/Documentation/process/changes.rst
> > > +++ b/Documentation/process/changes.rst
> > > @@ -60,6 +60,7 @@ openssl & libcrypto    1.0.0            openssl version
> > >  bc                     1.06.95          bc --version
> > >  Sphinx\ [#f1]_         1.7              sphinx-build --version
> > >  cpio                   any              cpio --version
> > > +GNU tar                1.28             tar --version
> > >  gtags (optional)       6.6.5            gtags --version
> > >  ====================== ===============  ========================================
> > >
> > > @@ -175,6 +176,12 @@ You will need openssl to build kernels 3.7 and higher if module signing is
> > >  enabled.  You will also need openssl development packages to build kernels 4.3
> > >  and higher.
> > >
> > > +Tar
> > > +---
> > > +
> > > +GNU tar is needed if you want to enable access to the kernel headers via sysfs
> > > +(CONFIG_IKHEADERS).
> >
> > CONFIG_IKHEADERS does also require 'xz' (cp. kernel/gen_kheaders.sh),
> > should it be mentioned in changes.rst as well?
> 
> 
> It is true, bue 'xz' is required in other situations too.
> 
> For example,
> CONFIG_KERNEL_XZ
> CONFIG_MODULE_COMPRESS_XZ
> CONFIG_INITRAMFS_COMPRESSION_XZ
> 
> 
> If we document the requirement for 'xz',
> we need to document the requirement for
> 'gzip', 'zstd', 'lzma', etc. for the same reason.
> 
> So, I want to go only with 'tar' in this series.

yes, sounds reasonable.

Kind regards,
Nicolas

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