Geant4 v4_10_4_p02ba e20 build

[admlw]

Hi there,

For NOvA’s next production we’re considering sticking with the version of geant4 which we used in our previous production. That was geant4 v4_10_4_p02ba w/ e17:prof, built against nutools v3_01_06. How painful would it be to get an e20 build of this version of Geant?

To my (very) untrained eye it looks like nug4 v1_12_02 is built against a v04_10 series geant, and looks like it is consistent with nutools v3_12_03 , so I’m hoping this isn’t an absolute nightmare. Gavin remembers that we might need art_root_io v1_08_03a and canvas_root_io from critic to avoid a problem we previously had reading files.

Obviously let us know if the lift here is too large, or if there’s any additional information we need to provide.
Cheers

[lgarren]

@admlw I need some clarification here.

Providing geant4 v4_10_4_p02ba for e20 should be straightforward.

I see that the nu v3_12_05 distribution contains art_root_io v1_08_03a. We can easily provide a nu v3_12_06 distribution that differs from v3_12_05 only in the release of geant4, nug4, and geant4reweight. If this is not what you want, we will need more clarification.

[lgarren]

Actually, since nutools will not need to be updated, the distribution will most likely be nu v3_12_05a

[admlw]

@lgarren Thanks for getting back on this so quickly - I think that is all we'll need. Thanks!

[admlw]

Hi folks, do you have an ETA on when this might be available for us to take a look at? Thanks!

[lgarren]

Things have been a bit tricky. I needed to make sure geant4 used the same clhep as art_root_io. Now there appear to be further cmake issues to sort out when building nug4. None of this is show stopping so far. I presume you are aware that the nu v3_12_05 distribution was built with geant4 v4_10_6_p01d.