Hi,
I would like to use two derived classes and put them in two different
branches of a tree. The two classes (PhysEvent and RandEvent) inherit from
GenEvent.
When I try to link the executable, I have the following answer :
/opt/Libs//libanalyse.so: undefined reference to`PhysEvent::StreamerNVirtual(TBuffer &)'
/opt/Libs//libanalyse.so: undefined reference to`RandEvent::DeclFileName(void)'
/opt/Libs//libanalyse.so: undefined reference to`PhysEvent::IsA(void)const'
/opt/Libs//libanalyse.so: undefined reference to`PhysEvent virtual table'
/opt/Libs//libanalyse.so: undefined reference to`PhysEvent::DeclFileName(void)'
/opt/Libs//libanalyse.so: undefined reference to`RandEvent::Class_Version(void)'
/opt/Libs//libanalyse.so: undefined reference to`RandEvent::IsA(void)const'
/opt/Libs//libanalyse.so: undefined reference to`RandEvent::DeclFileLine(void)'
/opt/Libs//libanalyse.so: undefined reference to`GenEvent::Class_Name(void)'
/opt/Libs//libanalyse.so: undefined reference to`RandEvent virtual table'
/opt/Libs//libanalyse.so: undefined reference to`GenEvent::ShowMembers(TMemberInspector &, char *)'
/opt/Libs//libanalyse.so: undefined reference to`RandEvent::StreamerNVirtual(TBuffer &)'
/opt/Libs//libanalyse.so: undefined reference to`Station::Print(ostream&) const'
/opt/Libs//libanalyse.so: undefined reference to`PhysEvent::Class_Version(void)'
/opt/Libs//libanalyse.so: undefined reference to`GenEvent::Streamer(TBuffer &)
/opt/Libs//libanalyse.so: undefined reference to`PhysEvent::DeclFileLine(void)'
and I don't understand why !
Is there a special way to use ClassDef and/or ClassImp when dealing with
derived classes ?
There are the files in the following order :
1) anaclass.h
2) anaclass.cc
3) Makefile
4) analyse.cc (contains the main routine)
5) AnaLinkDef.h
==============================================================
cat anaclass.h
==============================================================
#ifndef _ANACLASS_H_
#define _ANACLASS_H_
#include <string>
#include <vector>
#include <iostream>
#include "TROOT.h"
#include "TObject.h"
#include "TClonesArray.h"
using namespace std;
class Station : public TObject
{
public:
Station(){};
~Station(){};
double test;
void Print(ostream& os) const;
ClassDef(Station,1)
};
class GenEvent : public TObject
{
public:
GenEvent();
virtual ~GenEvent();
string fileName;
TClonesArray *tca;
Int_t Nstat;
Int_t totNstat;
void AddStation(const Station&);
void Clear();
ClassDef(GenEvent,1)
};
class PhysEvent : public GenEvent
{
public:
PhysEvent();
~PhysEvent();
Double_t a;
ClassDef(PhysEvent,1)
};
class RandEvent : public GenEvent
{
public:
RandEvent();
~RandEvent();
Double_t b;
ClassDef(RandEvent,1)
};
#endif
=============================================================
cat anaclass.cc
==============================================================
#include "anaclass.h"
ClassImp(Station)
ClassImp(GenEvent)
ClassImp(PhysEvent)
ClassImp(RandEvent)
#define MAXPEVTS 20
#define MAXREVTS 20
/**************** GenEvent ***************/
GenEvent::GenEvent()
{
tca = new TClonesArray("Station",MAXPEVTS);
Nstat = 0;
totNstat = 0;
}
GenEvent::~GenEvent()
{
if( tca != NULL ) delete tca;
}
void GenEvent::AddStation(const Station& st)
{
TClonesArray &newstation = *tca;
new(newstation[Nstat++]) Station(st);
totNstat++;
}
void GenEvent::Clear()
{
tca->Clear();
Nstat = 0;
}
/******************** PhysEvent *******************/
PhysEvent::PhysEvent() : GenEvent() {}
/******************** RandEvent *******************/
RandEvent::RandEvent() : GenEvent() {}
==============================================================
cat Makefile
==============================================================
ROOTDIR=/opt/root/
ROOTBIN=${ROOTDIR}bin/
ROOTLIB=${ROOTDIR}lib/
TMP=/opt/
OBJSDIR=${TMP}Objs/
LIBSDIR=${TMP}Libs/
MOBJS=${OBJSDIR}AnaDict.o ${OBJSDIR}analib.o ${OBJSDIR}anaclass.o
CFLAGS=`${ROOTBIN}root-config --cflags` -Wall -DDPA -g
LIBS=`${ROOTBIN}root-config --libs` -Wl,-rpath ${ROOTLIB}
EXE=./analyse
all: ${EXE}
${OBJSDIR}%.o: %.cc
${CXX} -c $< -o $@ ${CFLAGS}
AnaDict.cc: analib.h anaclass.h AnaLinkDef.h
${ROOTBIN}rootcint -f AnaDict.cc -c analib.h anaclass.h
AnaLinkDef.h
${LIBSDIR}libanalyse.a: ${MOBJS}
ar r $@ ${MOBJS}
${LIBSDIR}libanalyse.so: ${MOBJS}
g++ -shared -o $@ ${MOBJS}
clean:
rm -f ${OBJSDIR}*.o ${EXE}
rm -f ${LIBSDIR}*.a ${LIBSDIR}*.so
rm -f EbDict.* AnaDict.* core
analyse: ${LIBSDIR}libanalyse.a ${LIBSDIR}libanalyse.so
${OBJSDIR}analyse.o
${CXX} ${CFLAGS} $(OBJS) ${LIBS} ${OBJSDIR}analyse.o \
-L${LIBSDIR} -lanalyse -o $@
==============================================================
cat analyse.cc (contains the main routine)
==============================================================
#include "TROOT.h"
#include "TApplication.h"
#include "analib.h"
#include "anaclass.h"
#include <TFile.h>
#include <TTree.h>
TROOT root("Example","Example of data reading for the Auger experiment");
TTree * resultP;
TTree * resultR;
TFile * outfile;
PhysEvent * pevt;
RandEvent * revt;
int main()
{
TApplication theApp ( "App", NULL, 0 );
gROOT->Reset( );
outfile = new TFile( "/tmp/outfile.root", "RECREATE", "Demo root file
with ntuple" );
resultP = new TTree( "ResultP", "EAS parameters" );
resultR = new TTree( "ResultR", "EAS parameters" );
pevt = new PhysEvent();
revt = new RandEvent();
int bufsize = 10000;
Int_t split = 1;
resultP->Branch( "PhysEvents", "PhysEvent", &pevt, bufsize, split );
resultR->Branch( "RandEvents", "RandEvent", &revt, bufsize, split );
resultP->AutoSave();
resultR->AutoSave();
resultR->GetBranch("RandEvents")->SetAddress(&revt);
resultP->GetBranch("PhysEvents")->SetAddress(&pevt);
Station stat;
for( int i=0;i<100;i++ )
{
stat.test = i;
revt->AddStation(stat);
resultR->Fill();
revt->Clear();
}
outfile->Write();
outfile->Close();
return 0;
}
==============================================================
cat AnaLinkDef.h
==============================================================
#ifdef __CINT__
#pragma link off all globals;
#pragma link off all classes;
#pragma link off all functions;
#pragma link off all typedef;
#pragma link C++ class GenEvent;
#pragma link C++ class PhysEvent;
#pragma link C++ class RandEvent;
#pragma link C++ class Station;
#endif
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