GLIBC_2.0 {
    # Hidden entry point (through macros).
    # _pthread_cleanup_pop; _pthread_cleanup_pop_restore; _pthread_cleanup_push;
    # _pthread_cleanup_push_defer;

    # Internal libc interface to libpthread
    # __libc_internal_tsd_get; __libc_internal_tsd_set;

    # Overwritten libc functions.
    # TODO: define these.
    sigaction; longjmp; siglongjmp; exit; fork; sleep;
    sigprocmask; sigwait; waitpid;
    accept; connect; select; poll; read;
    write; readv; writev; pread; pwrite;
    recvfrom; sendto; 

    # POSIX.1c extensions to libc.
    # flockfile; funlockfile; ftrylockfile;

    # Non-standard POSIX1.x functions.
    pthread_suspend_np; pthread_resume_np; pthread_getstacksize_np; pthread_getcontext_np;
    pthread_bindtonative_np;

    # Real POSIX.1c functions.
    pthread_atfork; pthread_attr_destroy; pthread_attr_getdetachstate;
    pthread_attr_getinheritsched; pthread_attr_getschedparam;
    pthread_attr_getschedpolicy; pthread_attr_getscope; pthread_attr_init;
    pthread_attr_setdetachstate; pthread_attr_setinheritsched;
    pthread_attr_setschedparam; pthread_attr_setschedpolicy;
    pthread_attr_setscope; pthread_cancel; pthread_cond_broadcast;
    pthread_cond_destroy; pthread_cond_init; pthread_cond_signal;
    pthread_cond_timedwait; pthread_cond_wait; pthread_condattr_destroy;
    pthread_condattr_init; pthread_create; pthread_detach; pthread_equal;
    pthread_exit; pthread_getschedparam; pthread_getspecific; pthread_join;
    pthread_key_create; pthread_key_delete; pthread_kill;
    pthread_mutex_destroy; pthread_mutex_init; pthread_mutex_lock;
    pthread_mutex_trylock; pthread_mutex_unlock; pthread_mutexattr_destroy;
    pthread_mutexattr_init; pthread_once; pthread_self; pthread_setcancelstate;
    pthread_setcanceltype; pthread_setschedparam; pthread_setspecific;
    pthread_sigmask; pthread_testcancel;

    # sem_destroy; sem_getvalue; sem_init; sem_post; sem_trywait; sem_wait;
    # sigwait;

    # Protected names for functions used in other shared objects.
    __pthread_atfork; __pthread_initialize; __pthread_getspecific;
    __pthread_key_create; __pthread_mutex_destroy; __pthread_mutex_init;
    __pthread_mutex_lock; __pthread_mutex_trylock; __pthread_mutex_unlock;
    __pthread_mutexattr_destroy; __pthread_mutexattr_init;
    __pthread_mutexattr_settype; __pthread_once; __pthread_setspecific;

    # The error functions.
    __errno_location; 
    # __h_errno_location;

    # Must be preemptible
    # __sigaction;
  };
  GLIBC_2.1 {

    # Unix98 extensions.
    pthread_rwlock_init; pthread_rwlock_destroy; pthread_rwlock_rdlock;
    pthread_rwlock_tryrdlock; pthread_rwlock_wrlock; pthread_rwlock_trywrlock;
    pthread_rwlock_unlock; pthread_rwlockattr_init; pthread_rwlockattr_destroy;
    pthread_rwlockattr_getpshared; pthread_rwlockattr_setpshared;

    pthread_attr_getguardsize; pthread_attr_setguardsize;
    pthread_attr_getstackaddr; pthread_attr_setstackaddr;
    pthread_attr_getstacksize; pthread_attr_setstacksize;

    pthread_getconcurrency; pthread_setconcurrency;

    pthread_mutexattr_gettype; pthread_mutexattr_settype;

  };
  GLIBC_2.1.1 {

  };
  GLIBC_2.1.2 {

  };
  GLIBC_2.2 {
    # For the cancelation wrappers.
    # pread; __pread64; pread64; pwrite; __pwrite64; pwrite64; lseek64;
    # open64; __open64;

    # __res_state;

    # Names used internally.
    # __pthread_rwlock_init; __pthread_rwlock_destroy; __pthread_rwlock_rdlock;
    # __pthread_rwlock_tryrdlock; __pthread_rwlock_wrlock;
    # __pthread_rwlock_trywrlock; __pthread_rwlock_unlock;

    # Not really implemented.
    pthread_condattr_getpshared; pthread_condattr_setpshared;
    pthread_mutexattr_getpshared; pthread_mutexattr_setpshared;

    # New functions from IEEE Std. 1003.1-200x.
    # sem_timedwait;
    # pthread_attr_getstack; pthread_attr_setstack;
    # pthread_spin_destroy; pthread_spin_init; pthread_spin_lock;
    # pthread_spin_trylock; pthread_spin_unlock;
    # pthread_getcpuclockid;
    # pthread_barrier_destroy; pthread_barrier_init; pthread_barrier_wait;
    # pthread_barrierattr_destroy; pthread_barrierattr_init;
    # pthread_barrierattr_getpshared; pthread_barrierattr_setpshared;
    # pthread_mutex_timedlock;
    # pthread_rwlock_timedrdlock; pthread_rwlock_timedwrlock;

    # Extensions.
    # pthread_yield;

    # New internal function.
    # __pthread_initialize_minimal;
  };