Re: [Buildroot] [PATCH 1/2] package/ltp-testsuite: bump version to 20230127

From: "Yann E. MORIN" <yann.morin.1998@free.fr>
To: Petr Vorel <petr.vorel@gmail.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
	Fabrice Fontaine <fontaine.fabrice@gmail.com>,
	Petr Vorel <pevik@seznam.cz>,
	buildroot@buildroot.org
Subject: Re: [Buildroot] [PATCH 1/2] package/ltp-testsuite: bump version to 20230127
Date: Sat, 15 Apr 2023 10:05:47 +0200	[thread overview]
Message-ID: <20230415080547.GC2819@scaer> (raw)
In-Reply-To: <CAB1t1CwsMzTgYyAY_AFftyUh+OdXADpKBXTw0Ot1reibt=fWgg@mail.gmail.com>

Petr, All,

On 2023-04-14 22:54 +0200, Petr Vorel spake thusly:
> On Fri, 14 Apr 2023 at 21:01, Yann E. MORIN <yann.morin.1998@free.fr> wrote:
[--SNIP--]
> > Unless the upstream ltp has provision for supporting both kind of
> > headers, with or without the fix, then yes, I think this should be
> > rebased and kept. And re-submit upstream to explain it will support
> > older, existing toolchains.
> 
> I'll verify again support/config-fragments/autobuild/toolchain-configs.csv, if
> there are tests which will fail.  Or are these toolchains elsewhere? I'm asking
> to give some proof to upstream that there are toolchains with older kernel
> headers. Because upstream expects that old distros are being tested with old
> version and if people want new software they are able to update their
> toolchain. They will see a real example than just claiming "it's needed".
> Also have a way to check in the future that workaround can be removed.

I looked at toolchain/toolchain-external/toolchain-external-arm-aarch64/
which is the first external toolchain in the list of toolchain Buildroot
knows of.

That one is using kernel headers 4.20.13:

    https://developer.arm.com/downloads/-/gnu-a
    https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu-a/10.3-2021.07/srcrel/gcc-arm-src-snapshot-10.3-2021.07-manifest.txt

    Excerpt:
        [linux]
        type=git
        url=git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
        version=v4.20.13

It's the last toolchain from ARM that is not impacted by:
    https://bugs.linaro.org/show_bug.cgi?id=5825#c34

Even the release from 2020-12 still has kernel headers 4.20.13:
    https://developer.arm.com/downloads/-/arm-gnu-toolchain-downloads
    https://armkeil.blob.core.windows.net/developer/Files/downloads/gnu/12.2.rel1/srcrel/arm-gnu-toolchain-src-snapshot-12.2.rel1-manifest.txt

    Excerpt:
        [linux]
        type=git
        url=git://git.kernel.org/pub/scm/linux/kernel/git/stable/linux-stable.git
        version=v4.20.13

So, whether impacted or not by the abovementioned bug, people using
official tolchains from ARM use kernel headers 4.20.13, which I
understand do not have that fix.

And that's only by looking at one of the few toolchains Buildroot knows
of. There are countless such toolchains that have been built over the
years, and that they can't update (e.g. because they are using the
official toolchain provided by their chipco vendor, or because the
kernel they are using for their board is a fork by some vendor and does
not have that fix, and so on...).

Regards,
Yann E. MORIN.

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