extern step * RTS_VAR(g0s0);
extern generation * RTS_VAR(oldest_gen);
extern step * RTS_VAR(all_steps);
extern step * RTS_VAR(g0s0);
extern generation * RTS_VAR(oldest_gen);
extern step * RTS_VAR(all_steps);
/* -----------------------------------------------------------------------------
Initialisation / De-initialisation
/* -----------------------------------------------------------------------------
Initialisation / De-initialisation