ld {
  GLIBC_PRIVATE {
    # used for loading by static libraries
    _dl_var_init;
  }
}
libc {
  GLIBC_2.12 {
    _flush_cache;
    cacheflush;
    fallocate64;
    set_dataplane;
  }
  GLIBC_PRIVATE {
    __syscall_error;
    __vdso_clock_gettime;
  }
}