libc {
  GLIBC_2.2.5 {
    arch_prctl; __arch_prctl;

    ioperm; iopl;

    modify_ldt;
  }
}

librt {
  GLIBC_2.3.3 {
    # Changed timer_t.
    timer_create; timer_delete; timer_getoverrun; timer_gettime;
    timer_settime;
  }
}