In the code attached when I do make I get the error
/home/geant4/ausalib/source/eloss/RangeInterpolator.cpp:5:31: fatal error: Math/Interpolator.h: No such file or directory #include <Math/Interpolator.h>
^
compilation terminated.
I am attaching the code. The file Interpolator.h is present in the required location of Root but somehow the code is not able to access it.
The file Interpolator.h is present in the location root-6.06.08/math/mathmore/inc/Math .
I downloaded the source distribution root_v6.06.08.source.tar.gz and installed ROOT by myself using the " ./configure " method.
Check “root-config --has-mathmore” and see if you get “yes”.
If you get “no”, you need to rebuild your ROOT from scratch again (but make sure in advance that you have your operating system provided “gsl-devel” installed or that you switch the ROOT’s “builtin_gsl” on).