hidden void __pthread_testcancel(void);
hidden int __pthread_setcancelstate(int, int *);
hidden int __pthread_create(pthread_t *restrict, const pthread_attr_t *restrict, void *(*)(void *), void *restrict);
+#ifdef __wasilibc_unmodified_upstream
hidden _Noreturn void __pthread_exit(void *);
+#endif
hidden int __pthread_join(pthread_t, void **);
hidden int __pthread_mutex_lock(pthread_mutex_t *);
hidden int __pthread_mutex_trylock(pthread_mutex_t *);