From: Glenn Horton-Smith (gahs@phys.ksu.edu)
Date: Tue Dec 20 2005 - 12:37:19 CST
Hi Stan,
Yes, I was about to send out something about this. GLG4sim indeed
will not compile under the new Geant4 version, and the fix is
non-trivial. The issue is the significant changes to the
G4VFastSimulationModel class, which is used in GLG4PMTOpticalModel.
Unless I'm missing something, the required changes will be extensive
enough that it won't be practical to keep GLG4sim compatible with both
Geant4.7 and Geant4.8 simultaneously. It could be done, but it looks
like it would mean bracketing a fair number of lines of code with
#ifdefs, and the code might function differently between the two
versions. I think the migration to Geant4.8 will have to be planned as
a big discrete step at some point in the future. The CVS "branch"
capability will no doubt come in handy for this...
Bottom line for users: stick with Geant4 7.x for now.
-Glenn.
Stan Seibert wrote:
> Hi all,
>
> Hot on the heels of the ROOT 5 release, the GEANT4 team has released
> a new major version of their software. In reading through their
> release notes:
>
> http://geant4.cern.ch/geant4/source/ReleaseNotes4.8.0.html
>
> It looks like there have been a number of physics improvements,
> especially with multiple scattering. Unfortunately, there have also
> been a number of structural changes to the libraries which will
> necessitate several updates to RAT. (Unlike ROOT 5, which seems to
> work out of the box.) I haven't yet started investigating this, and
> I'm not sure where to put it on the priority list yet.
>
> Anyway, just wanted to warn people that GEANT 4.8.x almost certainly
> won't work with RAT.
>
> ---
> Stan Seibert
>
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