interchanging them doesn't lead to loading or linkage errors behavioral: a change is said to be behavioral-incompatible if the same program demonstrates different behavior before and after applying the change interchanging them doesn't lead to loading or linkage errors behavioral: a change is said to be behavioral-incompatible if the same program demonstrates different behavior before and after applying the change interchanging them doesn't lead to loading or linkage errors behavioral: a change is said to be behavioral-incompatible if the same program demonstrates different behavior before and after applying the change