libc {
  GLIBC_2.0 {
    # Exception handling support functions from libgcc
    __register_frame; __register_frame_table; __deregister_frame;
    __frame_state_for; __register_frame_info_table;
  }
  GLIBC_2.2.6 {
    ioperm;
  }
  GLIBC_2.3.3 {
    posix_fadvise64;
    posix_fallocate64;
  }
}