Issues with Ubuntu 14.04 -
nsgpucnminer: relocation error: /opt/Claymore10/nsgpucnminer: symbol _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1EPKcRKS3_, version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference
nsgpucnminer: relocation error: /opt/Claymore10/nsgpucnminer: symbol _ZNSt7__cxx1112basic_stringIcSt11char_traitsIcESaIcEEC1EPKcRKS3_, version GLIBCXX_3.4.21 not defined in file libstdc++.so.6 with link time reference
14.04 is older than Jesus. Try running something made this century.
I have an issues with AMD drivers ( 13.12) on my rig (R9 270 and R7 370 cards) on Ubuntu > 14.04
