**** Build of configuration Debug for project LinkedLists ****

make all
Building target: LinkedLists
Undefined symbols for architecture x86_64:
Invoking: MacOS X C++ Linker
g++  -o "LinkedLists"  ./src/DoublyLinkedList.o ./src/LinkedLists.o ./src/Node.o ./src/SingleLinkedList.o
  "SingleLinkedList<int>::SingleLinkedList()", referenced from:
      _main in LinkedLists.o
  "SingleLinkedList<int>::addToHead(int)", referenced from:
      _main in LinkedLists.o
  "SingleLinkedList<int>::~SingleLinkedList()", referenced from:
      _main in LinkedLists.o
ld: symbol(s) not found for architecture x86_64
collect2: ld returned 1 exit status
make: *** [LinkedLists] Error 1

**** Build Finished ****