From: Matthew Wilcox <willy@infradead.org>
To: Joe Perches <joe@perches.com>
Cc: LKML <linux-kernel@vger.kernel.org>,
Dave Hansen <dave.hansen@linux.intel.com>,
Dwaipayan Ray <dwaipayanray1@gmail.com>,
LukasBulwahn <lukas.bulwahn@gmail.com>,
linux-doc@vger.kernel.org, devicetree@vger.kernel.org,
linux-kbuild@vger.kernel.org, linux-hardening@vger.kernel.org,
linux-riscv@lists.infradead.org, netdev@vger.kernel.org,
linux-csky@vger.kernel.org
Subject: Re: What is the oldest perl version being used with the kernel ? update oldest supported to 5.14 ?
Date: Fri, 20 Aug 2021 19:25:50 +0100 [thread overview]
Message-ID: <YR/zrjiCwnzMMcmA@casper.infradead.org> (raw)
In-Reply-To: <37ec9a36a5f7c71a8e23ab45fd3b7f20efd5da24.camel@perches.com>
On Fri, Aug 20, 2021 at 10:27:59AM -0700, Joe Perches wrote:
> Perl 5.8 is nearly 20 years old now.
>
> https://en.wikipedia.org/wiki/Perl_5_version_history
>
> checkpatch uses regexes that are incompatible with perl versions
> earlier than 5.10, but these uses are currently runtime checked
> and skipped if the perl version is too old. This runtime checking
> skips several useful tests.
>
> There is also some desire for tools like kernel-doc, checkpatch and
> get_maintainer to use a common library of regexes and functions:
> https://lore.kernel.org/lkml/YR2lexDd9N0sWxIW@casper.infradead.org/
>
> It'd be useful to set the minimum perl version to something more modern.
>
> I believe perl 5.14, now only a decade old, is a reasonable target.
>
> Any objections or suggestions for a newer minimum version?
Not an objection per se, but some data points.
Oracle Linux 5 (released 2007, still under support) has perl 5.8.8
Oracle Linux 6 (released 2011) has perl 5.10.1
Oracle Linux 7 (released 2014) has perl 5.16.3
Oracle Linux 8 (released 2019) has perl 5.26.3
I don't know that we need to be able to build on a distro from 2007
or even from 2011. I think it's reasonable to require updating to a
2014 distro in order to build a 2021 kernel.
For comparison, we currently require gcc-4.9 to build the kernel, and
4.9.0 was released in 2014. So perl-5.16 wouldn't be an unreasonable
requirement, I believe.
next prev parent reply other threads:[~2021-08-20 18:28 UTC|newest]
Thread overview: 4+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-08-20 17:27 What is the oldest perl version being used with the kernel ? update oldest supported to 5.14 ? Joe Perches
2021-08-20 17:33 ` Willy Tarreau
2021-08-20 18:25 ` Matthew Wilcox [this message]
2021-08-21 5:43 ` Kees Cook
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