sam: > > On 2 Jan 2023, at 12:48, m1027 <m1...@posteo.net> wrote: > > > > Hi and happy new year. > > > > When we create apps on Gentoo they become easily incompatible for > > older Gentoo systems in production where unattended remote world > > updates are risky. This is due to new glibc, openssl-3 etc.
[...] > I'd really suggest just using stable in production and a mix > for developers so you can catch any problems beforehand. > > We try to be quite conservative about things like OpenSSL 3, > glibc updates, etc. Thanks, a misunderstanding then: I am talking about stable only. Whilst Gentoo may be conservative and all of you do an excellent job on keeping things smooth, incompatibilities of software being newly created on up-to-date developer systems (and then tried to be distributed to outdated production systems) may arise multiple times per year; *any* of the following alone may trigger a incompatibility. Just some random examples: (1) Most prominent, glibc updates. It has its sophisticated function versioning. You may or may not be hit. It is not depending on glibc's version but the internal function versions which are updated in a quite subtile way. (Function versioning is without doubt an impressive feature.) (2) libjpeg: In the past, libjpeg reached version 9 (like on Ubuntu today) but later was versioned 62 or 6.2 AFAIK. If you have an old Gentoo production system still on libjpeg-9, you have a hard time to update and distribute a new version of your app, as this version of libjpeg is not present in Gentoo anymore. (Don't get me wrong, there have probably been good reasons for this downgrade.) BTW: This little incompatibility is one of the reasons why it is hard to compile a app on Ubuntu for Gentoo. (3) An older one: libressl was removed. Well, we all remember the debate whether to keep it or not. (4) There is openssl-3 showing up on the horizon. I expect incompatibilities when distributing newly built software. (5) Portage EAPIs: If there is a new EAPI and you emerge --sync, then you need to update portage. This however, might require surprisingly many other updates. New python, setuptools and friends. I am not complaining here. Hey, we are on rolling release. Some of you may even know individual solutions to work around each of it. However, we just may get into trouble when distributing newly compiled apps (on new Gentoo systems) to older Gentoo systems. And we don't know in advance. I am looking for the best way to avoid that. Thanks
