This is a known problem: see ROOT 6 Build From Source Error on Ubuntu 14.04 LTS
Dirty solution:
make -j4
Instead of make.
Clean solution is to update your ROOT sources, a bug fix was recently implemented.
git pull
make
This is a known problem: see ROOT 6 Build From Source Error on Ubuntu 14.04 LTS
Dirty solution:
make -j4
Instead of make.
Clean solution is to update your ROOT sources, a bug fix was recently implemented.
git pull
make