I just upgraded from 5.17 to 5.20. When I attempt to compile using:
g++ nt.cpp /usr/local/root/bin/root-config --cflags --libs -g -o test
I now get error:
/tmp/cchSGb74.o(.gnu.linkonce.t._ZNK4ROOT4Math9PxPyPzE4DIdE1MEv+0xe5): In function ROOT::Math::PxPyPzE4D<double>::M() const': /usr/local/root/include/Math/GenVector/PxPyPzE4D.h:161: undefined reference toROOT::Math::Throw(ROOT::Math::GenVector_exception&)'
collect2: ld returned 1 exit status
This is precisely the error I used to get with 5.17 if I didn’t add -lMathCore to the compiler command. However, isn’t this library now included in the root-config command? Adding the library in manually again doesn’t work. Is there another library that now has to be linked?