Hi, I found error in pthread_inherit.c file (OSKit-20020317). Function pthread_sched_change_state: int pthread_sched_change_state(pthread_thread_t *pthread, int newprio, int policy) { schedmsg_t msg; ... has other declaration in pthread_internal.h: int pthread_sched_change_state(pthread_thread_t *pthread, int policy, const struct sched_param *param); So, I can not compile OSKit. Andrew Lipnitsky.