[zeromq-dev] Announce: Stable ZeroMQ release 4.0.1 - library SONAME

[AJ Lewis]

On Tue, Oct 08, 2013 at 08:17:09PM +0200, Pieter Hintjens wrote:
> Do all libraries do this? it goes directly against the advice of that
> page I quoted.

Most libraries do *not* do this.  New functionality does not break ABI
compatibility according to everything I've seen and read.

SONAME does only give you compatibility with old apps and new libraries, not
new apps and old libraries.  The implicit assumption is that the latest
version of the library is used everywhere, since there's no recompile of
apps necessary to use it.
 
> On Tue, Oct 8, 2013 at 7:07 PM, Jose Pedro Oliveira <jpo at di.uminho.pt> wrote:
> >
> > On 2013/10/08 17:28 , Pieter Hintjens wrote:
> >> On Tue, Oct 8, 2013 at 6:18 PM, Jose Pedro Oliveira <jpo at di.uminho.pt> wrote:
> >>
> >>> And what happens if I have an application that uses the v4 new features
> >>>    and I copy it to a system where there is only ZeroMQ v3 installed?
> >> Well, it won't work, for sure.
> >>
> >>> Note that ldd only reports the requirements based on the major number
> >>> (and yum/rpm also have a similar behaviour):
> >> That seems unfortunate and contradictory to the libtool rules. I'm
> >> sure there's a rationale but I don't know it.
> >>
> >> What is your suggestion? Afaics simply incrementing the major ABI
> >> number at every stable release is not feasible (4.1. 4.2, ...)
> >>
> > Suggestion: Bump only at the major stable releases (e.g. from v3 to v4).
> >
> > Currently in Fedora/EPEL we are supporting parallel installation of
> > of ZeroMQ v2 (2.2.0) and ZeroMQ v3 (3.2.4) libraries; and
> > we are also interested in supporting the parallel installation
> > of the ZeroMQ v4 libraries.
> >
> > Current package contents in Fedora:
> > ----------
> > # rpm -ql zeromq
> > /usr/lib64/libzmq.so.1
> > /usr/lib64/libzmq.so.1.0.1
> > /usr/share/doc/zeromq-2.2.0
> > /usr/share/doc/zeromq-2.2.0/AUTHORS
> > /usr/share/doc/zeromq-2.2.0/COPYING
> > /usr/share/doc/zeromq-2.2.0/COPYING.LESSER
> > /usr/share/doc/zeromq-2.2.0/ChangeLog
> > /usr/share/doc/zeromq-2.2.0/NEWS
> > /usr/share/doc/zeromq-2.2.0/README
> >
> > # rpm -ql zeromq3
> > /usr/lib64/libzmq.so.3
> > /usr/lib64/libzmq.so.3.0.0
> > /usr/share/doc/zeromq3-3.2.4
> > /usr/share/doc/zeromq3-3.2.4/AUTHORS
> > /usr/share/doc/zeromq3-3.2.4/COPYING
> > /usr/share/doc/zeromq3-3.2.4/COPYING.LESSER
> > /usr/share/doc/zeromq3-3.2.4/ChangeLog
> > /usr/share/doc/zeromq3-3.2.4/NEWS
> > /usr/share/doc/zeromq3-3.2.4/README
> > -----------
> >
> > Note:
> >   * you can't parallel install the zeromq[n]-devel packages
> >     (will cause file conflicts; e.g. libzmq.so)
> >
> >
> > Regards,
> > jpo
> > --
> > Jose Pedro Oliveira
> > * jpo at di.uminho.pt *
> >
> > _______________________________________________
> > zeromq-dev mailing list
> > zeromq-dev at lists.zeromq.org
> > http://lists.zeromq.org/mailman/listinfo/zeromq-dev
> _______________________________________________
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> zeromq-dev at lists.zeromq.org
> http://lists.zeromq.org/mailman/listinfo/zeromq-dev

-- 
AJ Lewis
Software Engineer
Quantum Corporation

Work:    651 688-4346
email:   aj.lewis at quantum.com

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