In this case I meant that something of a runtime or additional code could be tacked on to programs when the compiler and/or run time sees that a program only co

In this case I meant that something of a runtime or additional code could be tacked on to programs when the compiler and/or run time sees that a program only computes in response to input, for example. In the case of unikernels, distinguishing parts of the "system" is an arbitrary line.