[Rivet] YODA + Rivet2 beta testing installation on lxplus

[Andy Buckley]

There is now a preview installation of Rivet2 for people to play with at
/afs/cern.ch/sw/lcg/experimental/rivet . Sourcing
/afs/cern.ch/sw/lcg/experimental/rivet/rivetenv.sh should be enough to
use it: let me know if it doesn't behave for you.

A manual lxplus build is still not wonderfully smooth due to it being a
remarkably ancient & crappily set-up system: e.g. the LCG autotools
install is so borked that the only way I could find to get that working
(also for LHAPDF6) was to install it myself. But there is a
/afs/cern.ch/sw/lcg/experimental/rivet/build.sh script that should be a
good template for anyone who wants to install it themselves. A "modern"
Linux installation should not feature any gotchas, just a few
dependencies to be installed. I'm not sure about Macs but would like to
know how YODA and Rivet2 fare there.

With this installation now working (I think), the only blocker on YODA
and Rivet2 beta1 releases that I'm aware of is James' phantom division
segfault -- did I miss a reproducible example? Does it still happen with
this installation? If there's nothing concrete to try to bugfix, I think
we have to just go ahead with the release.  Any other reasons not to
release these (and Rivet 1.8.3) in the next few days?

Andy

-- 
Dr Andy Buckley, Royal Society University Research Fellow
Particle Physics Expt Group, University of Edinburgh

The University of Edinburgh is a charitable body, registered in
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