[zeromq-dev] http://hintjens.com/blog:85#toc5

[Robert Peek]

please remove me from this mailing list

On Sun, May 14, 2017 at 5:37 PM, Luca Boccassi <luca.boccassi at gmail.com>
wrote:

> On Sun, 2017-05-14 at 09:08 -0400, Kevin Meredith wrote:
> > Hi -
> >
> > Reading Pieter's above listed blog post, he noted:
> >
> > > we introduced the rule that new stable releases of the software
> > > must (a)
> >
> > talk to old stable releases and (b) they must support existing apps,
> > without changes. We more or less succeeded with that, so ZeroMQ
> > versions
> > 3.2 and 4.0 work nicely with 2.2 and 2.1, for example.
> >
> > I am interested to learn what this means.
> >
> > Does the above example mean that a 3.2 PUB could talk to a 2.2 SUB,
> > for
> > example?
> >
> > Thank you,
> > Kevin
>
> With regards to the network protocol (ZMTP), yes, libzmq supports all
> versions of the protocol, it detects it at runtime and uses the
> relevant encoder/decoder to talk with the peer(s).
> There were a couple of bugs that prevented full compatibility but they
> have been fixed last year. We do lack automated cross-compatibility CI
> tests though, there's an item on the issue tracker for it - help from
> volunteers would be very welcome.
>
> Regarding the library itself, API compatibility was broken with 3.0,
> and maintained since then.
>
> ABI compatibility was last broken with 4.1.0.
>
> Kind regards,
> Luca Boccassi
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