[Rivet] Python, Rivet 1.20, CERN AFS, LXBATCH

[Andy Buckley]

On 26/03/10 16:34, Frank Siegert wrote:
> Andy Buckley, Friday 26 March 2010:
>> But the real problem is that we aren't bundling the generated source
>> files anymore, so when they *are* generated, they are generated with
>> the system copy that isn't GCC4.4-compatible. I wasn't aware that we'd
>> stopped bundling these files... we used to have problems with HepMC
>> version details being written into these files, which caused
>> compatibility problems, but now that is all done in C++ and I think
>> it's safe for SWIG-generated files from my Ubuntu 9.10 machine (with
>> up-to-date SWIG) to be bundled in the tarball for use on SL machines.
>> At least, it finished compiling just fine when I copied the attached
>> files into the rivet/pyext directory: can you try that, Terrance?
>>
>> Riveteers: Any opposition to me re-adding the rivet_wrap.cc and
>> rivet.py bundling, if this works for Terrance?
> 
> We stopped bundling them because it wasn't necessary anymore: Without all 
> the HepMC complications, SWIG worked just fine even on SL4. Of course I 
> wasn't aware of the gcc 4.4 non-compatibility of that SWIG version. If 
> somebody provides/uses a gcc 4.4 SW environment, shouldn't this also 
> include an updated SWIG that would then be used? So maybe that problem 
> should rather be fixed in CERN TH's software setup.
> 
> I don't exactly remember why it is a bad idea to bundle them... are they 
> really as system agnostic as you describe?

They *should* be: they're just meant to be generic standard C++ wrapper
functions, connecting to whatever headers were included for the thing
being wrapped.

I have a feeling that we removed them because a) there was (apparently)
no longer a need and b) rivet_wrap.cc is pretty large, at ~500k.

Terrance, can you request via the TH group that the gcc44 setups need an
updated copy of SWIG, as Frank has suggested, since the system copy
doesn't produce gcc44-compatible code? That is the preferable solution,
I think.

Andy

-- 
Dr Andy Buckley
SUPA Advanced Research Fellow
Particle Physics Experiment Group, University of Edinburgh