PGASetFitnessType(3) on Linux
The text 4db620409686, as Debian 1.1 (Buzz) shipped it.
Set the type of fitness algorithm to use. Valid choices are PGA_FITNESS_RAW, PGA_FITNESS_NORMAL, or PGA_FITNESS_RANKING for raw fitness (the evaluation function value), linear normalization, or linear ranking, respectively. The default is PGA_FITNESS_RAW.