Daan,
This is the typical symptom of compiling your code with a version
of ROOT or/and gcc and linking it with a ROOT version compiled
with a different compiler.
Rene Brun
On Tue,
27 Apr 2004, daan wrote:
> Hi,
>
> I have some code that needs to be compiled with TFile.h and TTree.h
> included.
>
> When I compile on my own machine (SuSe 8.0, gcc 2.95.3) everything is
> fine. But when i use another machine (debian, gcc 2.95.4) the comilation
> gets stuck where a root object is constructed or deleted
>
> 42: TFile *outfile = new TFile (argv[2], "RECREATE");
> 46: TTree *tree = new TTree("nnfit", "NN result");
> 91: return 0;
>
> output of compilation
>
> g++ -g `root-config --cflags`
> -I/cms/external/lcg/external/root/3.10.01/rh73_gcc32/include -c
> nn2rootflux.cc
> g++ nn2rootflux.o `root-config --libs`
> -I/cms/external/lcg/external/root/3.10.01/rh73_gcc32/include -o
> ../../bin/nn2rootflux
> nn2rootflux.o: In function `main':
> /beo1/hubert/photonics_fit/src/nn2rootflux/nn2rootflux.cc:42: undefined
> reference to `TObject::operator new(unsigned int)'
> /beo1/hubert/photonics_fit/src/nn2rootflux/nn2rootflux.cc:42: undefined
> reference to `TFile::TFile(char const *, char const *, char const *, int)'
> /beo1/hubert/photonics_fit/src/nn2rootflux/nn2rootflux.cc:42: undefined
> reference to `TObject::operator delete(void *)'
> /beo1/hubert/photonics_fit/src/nn2rootflux/nn2rootflux.cc:46: undefined
> reference to `TObject::operator new(unsigned int)'
> /beo1/hubert/photonics_fit/src/nn2rootflux/nn2rootflux.cc:46: undefined
> reference to `TTree::TTree(char const *, char const *, int)'
> /beo1/hubert/photonics_fit/src/nn2rootflux/nn2rootflux.cc:46: undefined
> reference to `TObject::operator delete(void *)'
> /beo1/hubert/photonics_fit/src/nn2rootflux/nn2rootflux.cc:91: undefined
> reference to `TObject::operator delete(void *)'
> /beo1/hubert/photonics_fit/src/nn2rootflux/nn2rootflux.cc:91: undefined
> reference to `TObject::operator delete(void *)'
> collect2: ld returned 1 exit status
> make: *** [../../bin/nn2rootflux] Error 1
>
>
> what happens? and what can i do about it?
>
> thanks!
>
>
> daan
>
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