Hi, I’m trying to run this simple C++ macros #include <iostream> #include "RooRealVar.h" #include "TTree.h" #include "TCanvas.h" #include "RooDataSet.h" #include "RooPlot.h" #include "RooGaussian.h" using namespace RooFit; int main(){ RooRealVar x("x", "x", -10, 10); RooRealVar mean("…

Try the following makefile: [code]CXX:=root-config --cxx CXXFLAGS:=root-config --cflags LIBS:=root-config --libs macro: macro.o ${CXX} ${CXXFLAGS} -o $@ $^ ${LIBS} -lRooFit -lRooFitCore -lTMVA -lMLP -lTreePlayer -lMinuit %.o: %.cpp ${CXX} ${CXXFLAGS} -c $< clean: rm -f *~ macro.o macro[/code…

I got the same error ! `root-config --cxx` `root-config --cflags` -o macro macro.o `root-config --libs` -lRooFit -lTMVA -lMLP -lTreePlayer -lMinuit clang: warning: argument unused during compilation: '-pthread' Undefined symbols for architecture x86_64: "RooRealVar::RooRealVar(char const*, char …

First execute “make clean” and then “make”.

HI, i’ve followed your instructions and now it works. Thank you so much. Cheers Giorgio

Hello, I’m receiving a very similar error with the attached Makefile on macOS Sierra (10.12.4). I tried to solve the issue with the suggestion above but didn’t work. Could anyone comment on this? Makefile.txt (1.6 KB) Best, Bora