Building ROOT dictionaries in VisualC++.NET and Geant4

ROOT
1

Hello all

I want to use ROOT for histograms and analysis work in Geant4. I successfully installed ROOT and it runs by itself under cygwin. Now I want to link the ROOT libraries with my existing Geant4 project running under Windows XP.

I followed the instructions in the guide “ROOT and Visual C++.NET 2003 (7.1)”
(slac.stanford.edu/~gentit/) and adapted the settings of the “custom build step” to match my project. I also created a new file “LinkDef.h” and left it empty, since I do not know what needs to be in there.

When building the project, the “custom build step” fails with the message:
------ Build started: Project: Sterilisation_01, Configuration: Debug Win32 ------
Building ROOT dictionary
Error: cannot open file “globals.hh” FILE:Steril01Analysis.h LINE:39

“globals.hh” is my first include file in “Steril01Analysis.h”, which I listed under “Additional Dependencies” in the “custom build step”.

So it looks like the linker does not know the PATH of the Geant4 libraries. Is that something I have to put into the file “Link.Def.h”? What exactly is this file doing and what need to be in there?

Your help is appreciated very much. Thanks in advance
Matthias

2

Add the G4 include in your INCLUDE path.

Rene

3

Hello Rene
The “custon build step” does not allow any additional INCLUDE definitions. And my Project Properties do have the G4 includes included.

If I just want to use the ROOT libraries and classes to fill, save and draw histograms do I even need the dictionary files and the LinkDef.h file?

Thanks
Matthias

4

Hi Matthias,
you can try two things:

  • in MSVC, go to Tools->Options->Projects->VC++ Directories, under “Show directories for:” select the “Include files” entry, and add (using the folder symbol) a new entry for your geant include dir.

  • If that doesn’t work, edit the custom build step. Instead of “$(ROOTSYS)\bin\rootcint -f TMusterdict.cpp -c TMuster.h LinkDef.h”, set “$(ROOTSYS)\bin\rootcint -f TMusterdict.cpp -c -IC:\Geant\include TMuster.h LinkDef.h” (note that you’ll have to change the geant include path to whatever is applicable for your installation!)
    Axel.