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Date: Sun, 19 Jan 2025 12:57:06 -0700
From: Nathan Chancellor <nathan@kernel.org>
To: =?iso-8859-1?Q?Micka=EBl_Sala=FCn?= <mic@digikod.net>
Cc: =?iso-8859-1?Q?G=FCnther?= Noack <gnoack3000@gmail.com>,
	Jonathan Corbet <corbet@lwn.net>, Kees Cook <kees@kernel.org>,
	linux-kernel@vger.kernel.org, linux-security-module@vger.kernel.org,
	linux-integrity@vger.kernel.org,
	=?iso-8859-1?Q?G=FCnther?= Noack <gnoack@google.com>,
	Jeff Xu <jeffxu@chromium.org>, Mimi Zohar <zohar@linux.ibm.com>,
	Paul Moore <paul@paul-moore.com>,
	Roberto Sassu <roberto.sassu@huawei.com>,
	Serge Hallyn <serge@hallyn.com>,
	Stefan Berger <stefanb@linux.ibm.com>,
	Stephen Rothwell <sfr@canb.auug.org.au>, linux-doc@vger.kernel.org
Subject: Re: [PATCH v1] selftests: Handle old glibc without execveat(2)
Message-ID: <20250119195706.GB1824045@ax162>
References: <20250115144753.311152-1-mic@digikod.net>
 <20250117.062883f45a7d@gnoack.org>
 <20250117.aiy2ooph6Lee@digikod.net>
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In-Reply-To: <20250117.aiy2ooph6Lee@digikod.net>

On Fri, Jan 17, 2025 at 04:47:05PM +0100, Mickaël Salaün wrote:
> On Fri, Jan 17, 2025 at 03:42:22PM +0100, Günther Noack wrote:
> > Do you want to add a comment next to these, to remind ourselves do undo this?
> > You are surely not planning to support old versions of glibc indefinitely?
> 
> I don't about glibc.  Minimal versions for other tools are documented
> here though:
> https://docs.kernel.org/process/changes.html
> 
> Nathan, Jon, any idea?

I do not know if the idea of setting a minimum supported version of a
libc has ever come up before (at least I am unaware of one). I suspect
most people do a patch like this then move on because it is the
maximally compatible option and these samples are not changing much, are
they? This is the first build error I can recall seeing as a result of
using an older glibc environment. If we would like to seriously consider
setting a minimum supported version of glibc, it deserves a conversation
with a wider audience since it could impact areas other than the
samples, such as host tools (and IMHO, feels like a big hammer).

Cheers,
Nathan