Hi Sonal, Try the following: Open the "GNUmakefile" in your gate home directory and edit the following block: ================================================= ifdef G4ANALYSIS_USE_ROOT CPPFLAGS += -DG4ANALYSIS_USE_ROOT -D_REENTRANT -I$(ROOTSYS)/include ifdef G4ANALYSIS_USE_ROOT_PLOTTER CPPFLAGS += -DG4ANALYSIS_USE_ROOT_PLOTTER endif EXTRALIBS += -L$(ROOTSYS)/lib \ -lCore -lCint \ -lHist -lGraf -lGraf3d -lGpad \ -lTree -lRint -lPostscript \ -lMatrix -lPhysics \ -lm -ldl -lpthread -rdynamic endif ================================================== it should look like this: ================================================== ifdef G4ANALYSIS_USE_ROOT CPPFLAGS += -DG4ANALYSIS_USE_ROOT -D_REENTRANT -I$(ROOTSYS)/include ifdef G4ANALYSIS_USE_ROOT_PLOTTER CPPFLAGS += -DG4ANALYSIS_USE_ROOT_PLOTTER endif EXTRALIBS += -L$(ROOTSYS)/lib \ -lCore -lCint \ -lHist -lGraf -lGraf3d -lGpad \ -lTree -lRint -lPostscript \ -lMatrix -lPhysics \ -lm -ldl -lpthread -rdynamic \ -lRIO -lRMySQL -lNet endif ================================================= This worked for me. Good luck! Georgi <div>On 4/14/08, Sonal Ambwani <<a href="mailto:ambwani@bu.edu">ambwani@bu.edu</a>> wrote:<blockquote class="gmail_quote" style="margin-top: 0; margin-right: 0; margin-bottom: 0; margin-left: 0; margin-left: 0.80ex; border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex"> Dear Gate users : I have been trying to compile GATE on a 64bit redhat linux environment, and the following are the errors that I get when the make process terminates : Linking Gate ... /home/sonal/gate/tmp/Linux-g++/Gate/libGate.a(GateHitFileReader.o)(.text+0x39c): In function `GateHitFileReader::PrepareAcquisition()': GateHitFileReader.cc: undefined reference to `TFile::TFile(char const*, char const*, char const*, int)' /home/sonal/gate/tmp/Linux-g++/Gate/libGate.a(GateToRoot.o)(.text+0x223c): In function `GateToRoot::RecordBeginOfAcquisition()': GateToRoot.cc: undefined reference to `TFile::TFile(char const*, char const*, char const*, int)' /home/sonal/gate/tmp/Linux-g++/Gate/libGate.a(GateToRoot.o)(.text+0x244e):GateToRoot.cc: undefined reference to `TFile::TFile(char const*, char const*, char const*, int)' /home/sonal/gate/tmp/Linux-g++/Gate/libGate.a(GateToRoot.o)(.text+0x2ef5): In function `GateToRoot::RecordVoxels(GateVGeometryVoxelStore*)': GateToRoot.cc: undefined reference to `TFile::TFile(char const*, char const*, char const*, int)' /home/sonal/root/lib/libHist.so: undefined reference to `TMath::Nint(double)' /home/sonal/root/lib/libTree.so: undefined reference to `vtable for TSQLRow' /home/sonal/root/lib/libTree.so: undefined reference to `TFileCacheRead::TFileCacheRead(TFile*, int)' /home/sonal/root/lib/libHist.so: undefined reference to `ROOT::Math::GaussIntegratorOneDim::Integral(double, double)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::ReadArray(double*&)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::ReadArray(int*&)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::ReadStaticArray(char*)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::WriteArray(bool const*, int)' /home/sonal/root/lib/libHist.so: undefined reference to `TMath::ErfInverse(double)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::ReadArrayFloat16(float*&, TStreamerElement*)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::ReadArray(float*&)' . . . . /home/sonal/root/lib/libGraf3d.so: undefined reference to `TMath::Normalize(float*)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::ReadFloat16(float*, TStreamerElement*)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::ReadStaticArray(int*)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::ReadStaticArray(short*)' /home/sonal/root/lib/libTree.so: undefined reference to `TFile::GetCacheRead() const' /home/sonal/root/lib/libHist.so: undefined reference to `ROOT::Math::GaussLegendreIntegrator::~GaussLegendreIntegrator()' /home/sonal/root/lib/libTree.so: undefined reference to `TSQLRow::Streamer(TBuffer&)' /home/sonal/root/lib/libHist.so: undefined reference to `ROOT::Math::RichardsonDerivator::~RichardsonDerivator()' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::CheckObject(void const*, TClass const*)' /home/sonal/root/lib/libTree.so: undefined reference to `int TStreamerInfo::ReadBuffer<char**>(TBuffer&, char** const&, int, int, int, int)' /home/sonal/root/lib/libTree.so: undefined reference to `TBufferFile::DecrementLevel(TVirtualStreamerInfo*)' /home/sonal/root/lib/libTree.so: undefined reference to `TFileCacheRead::TFileCacheRead()' /home/sonal/root/lib/libHist.so: undefined reference to `TMath::Gaus(double, double, double, bool)' /home/sonal/root/lib/libHist.so: undefined reference to `TMath::Gamma(double, double)' /home/sonal/root/lib/libHist.so: undefined reference to `TRandom3::Rndm(int)' /home/sonal/root/lib/libGraf.so: undefined reference to `ROOT::Fit::BinData::Add(double, double, double, double, double)' /home/sonal/root/lib/libTree.so: undefined reference to `typeinfo for TEmulatedCollectionProxy' collect2: ld returned 1 exit status make: *** [/home/sonal/gate/bin/Linux-g++/Gate] Error 1 Can someone pinpoint the cause of this failure? Thanks. Sonal Quoting Wolfram Stiller <<a href="mailto:w.stiller@dkfz-heidelberg.de" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">w.stiller@dkfz-heidelberg.de</a>>: <blockquote class="gmail_quote" style="border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex"> Dear Sonal,<div> On Friday 11 April 2008 23:10, Sonal Ambwani wrote: <blockquote class="gmail_quote" style="border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex"> I am getting the following errors during the make process of Gate installation : Linking Gate ... /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXt.so when searching for -lXt /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXt.a when searching for -lXt /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libGLU.so when searching for -lGLU /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libGLU.a when searching for -lGLU /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXmu.so when searching for -lXmu /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXmu.a when searching for -lXmu /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXt.so when searching for -lXt /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXt.a when searching for -lXt /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXext.so when searching for -lXext /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libXext.a when searching for -lXext /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libX11.so when searching for -lX11 /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libX11.a when searching for -lX11 /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libSM.so when searching for -lSM /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libSM.a when searching for -lSM /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libICE.so when searching for -lICE /usr/bin/ld: skipping incompatible /usr/X11R6/lib/libICE.a when searching for -lICE Please help me fix this issue. It's apparent that there is a clash between the 32 bit and the 64 bit libraries... </blockquote> </div> these messages are no errors and just tell you that the 32bit libraries (which by default are installed in addition to the 64bit libraries when installing a 64bit linux system) where skipped when linking the program - you probably have a 64bit linux system installed. If the 32bit libraries are in your library path the linker will find these, notice they are 32 bit (and thus "incompatible") and link against the 64bit libraries (if they are in your library path). <blockquote class="gmail_quote" style="border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex"> but I am not sure how to go about correcting it. </blockquote> Thus there is no need to correct anything, just as long as the linking process does not return any errors. In case you get an error message from the linker, you should post that one instead, the lines above are just an information from the linker. <blockquote class="gmail_quote" style="border-left-color: #cccccc; border-left-width: 1px; border-left-style: solid; padding-left: 1ex"> Thanks in advance, </blockquote> Hope it helps. Regards Wolf ::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::::: Dipl. Phys. Wolfram Stiller German Cancer Research Center (DKFZ) Dept. of Medical Physics in Radiology (E020) Im Neuenheimer Feld 280 D-69120 Heidelberg Germany Tel.: +49 (0) 6221 42 2468 Fax:  +49 (0) 6221 42 2572 E-mail: <a href="mailto:w.stiller@dkfz.de" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">w.stiller@dkfz.de</a>        <a href="mailto:wolfram.stiller@dkfz.de" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">wolfram.stiller@dkfz.de</a> Diese E-Mail enthält vertrauliche und/oder rechtlich geschützte Informationen. Wenn Sie nicht der richtige Adressat sind oder diese E-Mail irrtümlich erhalten haben, informieren Sie bitte sofort den Absender und vernichten Sie diese E-Mail. Das unerlaubte Kopieren sowie die unbefugte Weitergabe dieser Mail ist nicht gestattet. This e-mail may contain confidential and/or privileged information. If you are not the intended recipient (or have received this e-mail in error) please notify the sender immediately and destroy this e-mail. Any unauthorized copying, disclosure or distribution of the material in this e-mail is strictly forbidden. </blockquote> Sonal Ambwani Dept. of Electrical and Computer Engineering Boston University<div> _______________________________________________ Gate-users mailing list <a href="mailto:Gate-users@lists.healthgrid.org" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">Gate-users@lists.healthgrid.org</a> <a href="http://lists.healthgrid.org/mailman/listinfo/gate-users" target="_blank" onclick="return top.js.OpenExtLink(window,event,this)">http://lists.healthgrid.org/mailman/listinfo/gate-users</a> </div></blockquote> </div>