Undefined symbol in Xcode when using libtorch

I’ve compiled libtorch for iOS simulator as shown here and linked it to my Xcode project.

Includes work fine, but actual libtorch code cases this error when building:

Undefined symbols for architecture arm64:
“c10::UndefinedTensorImpl::_singleton”, referenced from:
c10::UndefinedTensorImpl::singleton() in test.o
ld: symbol(s) not found for architecture arm64
clang: error: linker command failed with exit code 1 (use -v to see invocation)

Code as test.cpp:

#include "test.hpp"
#include "ATen/ATen.h"
#include "caffe2/core/timer.h"
#include "caffe2/utils/string_utils.h"
#include "torch/csrc/autograd/grad_mode.h"
#include "torch/csrc/jit/serialization/import.h"
#include "torch/script.h"

at::Tensor v;

Please, tell what I am doing wrong and how to fix it.