Re: [Buildroot] [PATCH 1/2] package/mbedtls3: new package

From: Thomas Petazzoni <thomas.petazzoni@bootlin.com>
To: Fabrice Fontaine <fontaine.fabrice@gmail.com>
Cc: Samuel Martin <s.martin49@gmail.com>,
	Buildroot Mailing List <buildroot@buildroot.org>
Subject: Re: [Buildroot] [PATCH 1/2] package/mbedtls3: new package
Date: Tue, 28 Dec 2021 18:14:47 +0100	[thread overview]
Message-ID: <20211228181447.2a42dc86@windsurf> (raw)
In-Reply-To: <CAPi7W80OfGF3AhM2h6mjtsUjLEnYEV4gteJ12GFq4edNysEV5A@mail.gmail.com>

Hello,

On Tue, 28 Dec 2021 18:07:03 +0100
Fabrice Fontaine <fontaine.fabrice@gmail.com> wrote:

> > An important (and unfortunate point) is that apparently mbedtls3 cannot
> > be installed side-by-side with mbedtls. At least that's what your
> > "depends on !BR2_PACKAGE_MBEDTLS" seems to hint.  
> Indeed, both versions install their headers in include/mbedtls.
> >
> > This is a major annoyance, and I'm not sure how Linux distributions
> > will handle this migration if they cannot have mbedtls 2.x and mbedtls
> > 3.x installed side by side.  
> 3.0 was released in July.
> To my knowledge, hiawatha is one of the first package that uses this
> new API and buildroot will probably be one of the first build system
> that will provide mbedts3.
> IMHO, being unable to install both versions side by side is pretty
> common: we had the same issue with libupnp 1.6.x and libupnp 1.8.x.
> Concerning libupnp, we even had to revert the possibility to install
> both versions side by side because it was a "burden to programs
> linking against libupnp":
> https://github.com/pupnp/pupnp/commit/07f504c61bd9e4d93eb3d373ffc8527cafe0b9af

I'm not sure to follow you here. The fact that it's pretty common
doesn't make it a good solution. It makes the transition period
absolutely awful.

With the currently proposed approach, someone who today has a working
configuration that has hiawatha and belle-sip can conveniently build
both in the same image. With your patch applied, this is no longer
possible, due to hiawatha now using mbedtls3, which cannot be installed
side-by-side with mbedtls.

This doesn't seem very acceptable for us, and probably is even less
acceptable for major Linux distributions.

Has this been discussed with upstream mbedtls ?

Thomas
-- 
Thomas Petazzoni, co-owner and CEO, Bootlin
Embedded Linux and Kernel engineering and training
https://bootlin.com
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