Well, if he is compiling with ACLIC
.L Sample.h++
he doesn't need to load the lib ... it is already loaded.
John
Ahmed Ali Abdelalim wrote:
> Hi Bob,
>
> you compiled and linked now you need to tell ROOT to loaded your
> library .To do this you have two ways:
> 1- login to root then do
> gSystem->Load("libMyLib.so");
> before execute your code.
>
> 2- make a root map file ( for ex.: myLib.rootmap) to tell root to load
> your library when it starts. the format is trivial like,
>
> Library.TmyLib: libMyLib.so
>
> hth
> Cheers,
> Ahmed
>
>
> ##################################################
> #Ahmed Ali Abdelalim Phone(Uni):+41223796213
> #University of Geneva mobil: +41 78 611 7329
> #Physics Section, DPNC
> #
> #CERN PH/UAT (ATLAS), Phone:+412276 74279
> #Office: 40-1-D32
> #CH-1211 Geneve 23 Switzerland.
> ##################################################
>
>
> ------------------------------------------------------------------------
> *De:* owner-roottalk_at_root.cern.ch de la part de Bob
> *Date:* lun. 9/27/2010 12:41
> *À:* roottalk_at_lxroot01.cern.ch
> *Objet :* Re: [ROOT] TTree with user defined class
>
> Thanks John,
>
> First I moved the class definition to Sample.h then I choose the ACLiC
> option to generate the dictionary (.L Sample.h+). I got two new file
> Sample_h.so and Sample_h.d
>
> When I try to run the program I have exactly the same error :
> Error in <TTree::Branch>: The pointer specified for debug is not of a
> class or type known to ROOT.
>
> I also tried to link ttree_write.o against the library Sample_h.so but
> without success, should I keep going in this way ? I'm a bit lost !
>
> Thanks,
>
> Bob
>
> 2010/9/27 John Idarraga <idarraga_at_cern.ch>:
> > Hello Bob,
> >
> > Yeah, you need a dictionary, a couple of macros in your source file and
> > that's it. Check this out
> >
> > http://root.cern.ch/drupal/content/interacting-shared-libraries-rootcint
> >
> > if you have any trouble let me know,
> >
> > John Idarraga
> >
> > Bob wrote:
> >>
> >> Hello,
> >>
> >> I'm a Root beginner, I'm trying to save a class to a TTree. Until now
> >> I managed to store and read "simple" type like int and STL objects,
> >> but not homemade objects.
> >>
> >> I'm made a short example :
> >>
> >> Code snippet :
> >>
> >> #include <TFile.h>
> >> #include <TTree.h>
> >> #include <vector>
> >> #include <iostream>
> >>
> >> class Sample {
> >> public:
> >> int i;
> >> std::vector<int> hits;
> >> };
> >>
> >> int main() {
> >> Sample *s = new Sample();
> >> TFile *f1 = new TFile("debug.root","RECREATE");
> >> if (f1->IsZombie()) {
> >> std::cerr << "! Unable to create debug.root" <<
> std::endl;
> >> return -1;
> >> }
> >> TTree *tree = new TTree("T","Debug");
> >> //Case C
> >> // MyClass object;
> >> // TBranch *branch = tree->Branch(branchname, &object,
> >> bufsize, splitlevel)
> >> //
> >> tree->Branch("debug",s);
> >> for(int j=0;j<10;j++) {
> >> s->hits.empty();
> >> for(int i=0;i<100;i++) {
> >> s->hits.push_back(42+i);
> >> }
> >> tree->Fill();
> >> }
> >> f1->Write();
> >> delete s;
> >> delete tree;
> >> delete f1;
> >> return 0;
> >> }
> >>
> >> I compile with
> >>
> >> g++ -Wall -pedantic -pthread -m32
> >> -I/home/bob/root/root-5.26.00d/include -c ttree_write.cxx -o
> >> ttree_write.o
> >>
> >> and I link with
> >>
> >> g++ -L/home/bob/root/root-5.26.00d/lib -lNew -lCore -lCint -lRIO
> >> -lNet -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript
> >> -lMatrix -lPhysics -lMathCore -lThread -pthread -lm -ldl -rdynamic
> >> -L/home/bob/root/root-5.26.00d/lib -lNew -lCore -lCint -lRIO -lNet
> >> -lHist -lGraf -lGraf3d -lGpad -lTree -lRint -lPostscript -lMatrix
> >> -lPhysics -lMathCore -lThread -lGui -pthread -lm -ldl -rdynamic
> >> ttree_write.o -o ttree_write
> >>
> >> When I run the program I got
> >> Error in <TTree::Branch>: The pointer specified for debug is not of a
> >> class known to ROOT
> >>
> >> I'm sure that I miss an important step but I'm out of ideas ! Any
> tips ?
> >>
> >>
> >
> >
>
Received on Mon Sep 27 2010 - 13:40:29 CEST