TestFunctions.o: In function `test6()':
/in/compile/TestFunctions.cpp:130: undefined reference to `BinaryTree::BinaryTree(BinaryTree const&)'
TestFunctions.o: In function `test11()':
/in/compile/TestFunctions.cpp:184: undefined reference to `BinaryTree::BinaryTree(BinaryTree const&)'
TestFunctions.o: In function `test12()':
/in/compile/TestFunctions.cpp:196: undefined reference to `BinaryTree::BinaryTree(BinaryTree const&)'
TestFunctions.o: In function `test15()':
/in/compile/TestFunctions.cpp:233: undefined reference to `BinaryTree::BinaryTree(BinaryTree const&)'
TestFunctions.o: In function `test23()':
/in/compile/TestFunctions.cpp:321: undefined reference to `BinaryTree::BinaryTree(BinaryTree const&)'
collect2: error: ld returned 1 exit status
/in/compile/Makefile:56: recipe for target 'test' failed
make: *** [test] Error 1