Dear rooters, I have created a very basics class, which is even based on aa working class by Michal Kreps, added it into our small root project, compiled the library and when I want to use that library, I get the following error: root [0] gSystem->Load("../lib/libmicro.so"); dlopen error: /afs/cern.ch/user/o/ondrejch/public/mixing/src/./../lib/libmicro.so: undefined symbol: __vt_19TBigDSWriteParticle Load Error: Failed to load Dynamic link library /afs/cern.ch/user/o/ondrejch/public/mixing/src/./../lib/libmicro.so *** Interpreter error recovered *** also when I want to link it with another code, I get: g++ -o /afs/cern.ch/user/o/ondrejch/public/dst_write/bin/dst_write dst_write.o -L/afs/cern.ch/na49/library/pro/lib -ldb -ltrk -g -L/afs/cern.ch/na49/library/local/ROOT/root/lib -lCore -lNew -lHist -lCint -lMatrix -lTree -lPhysics -lRint -lMatrix -lMinuit -lEG -lGraf-lGraf3d -lGpad -L/afs/cern.ch/na49/library/pro/DSPACK/lib -ldspack /usr/local/lib/libshift.a /afs/cern.ch/user/o/ondrejch/public/mixing/lib/libmicro.so -L/usr/lib/gcc-lib/i386-redhat-linux/2.96 -lg2c -L/afs/cern.ch/sw/fortran/pgi/pgi324/linux86/lib/ -lpgftnrtl -lpgc -L/usr/lib/gcc-lib/i386-redhat-linux/2.96 -lg2c -ldl -lm -lc -lnsl -lcrypt /afs/cern.ch/user/o/ondrejch/public/mixing/lib/libmicro.so: undefined reference to `TBigDSWriteParticle::IsA(void) const' /afs/cern.ch/user/o/ondrejch/public/mixing/lib/libmicro.so: undefined reference to `TBigDSWriteParticle type_info function' /afs/cern.ch/user/o/ondrejch/public/mixing/lib/libmicro.so: undefined reference to `TBigDSWriteParticle virtual table' collect2: ld returned 1 exit status gmake[2]: *** [/afs/cern.ch/user/o/ondrejch/public/dst_write/bin/dst_write] Error 1 We tried everything we could and we are still lost :( Thanks for any help These is the sources of the simple class in question --> TBigDSWriteParticle.h: #ifndef TBigDSWriteParticle_Header #define TBigDSWriteParticle_Header #include "TObject.h" #include "TObjArray.h" class TBigDSWriteParticle : public TObject { private : Float_t fPx; // Momenta in x direction in LAB Float_t fPy; // Momenta in y direction in LAB Float_t fPz; // Momenta in z direction in LAB public : TBigDSWriteParticle(); TBigDSWriteParticle(Float_t px,Float_t py, Float_t pz); ~TBigDSWriteParticle(); void SetPx(Float_t px) {fPx=px;}; // Set px void SetPy(Float_t py) {fPy=py;}; // Set py void SetPz(Float_t pz) {fPz=pz;}; // Set pz Float_t GetPx() {return fPx;}; // Returns px Float_t GetPy() {return fPy;}; // Returns py Float_t GetPz() {return fPz;}; // Returns pz ClassDef(TBigDSWriteParticle,1) // Event base class }; #endif TBigDSWriteParticle.cxx: #include "TObject.h" #include "TBigDSWriteParticle.h" ClassImp(TBigDSWriteParticle) TBigDSWriteParticle::TBigDSWriteParticle() { fPx=0; fPy=0; fPz=0; } TBigDSWriteParticle::TBigDSWriteParticle(Float_t px,Float_t py, Float_t pz) { fPx=px; fPy=py; fPz=pz; } thanks and greetings, 0ndrej CHvala, NA49
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