How do I debug into libevs.a or libais.a library after the source has moved?

Ocassionally it is helpful to debug into the libraries that provide services for openais. When the source has not moved, this is an easy task. When the source locations have changed, the debugger can no longer find the source code to debug into. Each debugger is different, but usually there is a mechanism to specify a search path for source code. Using GDB, the command is directory [path].