Install PyTorch on a Raspberry Pi 4.

						
						#include <iostream>
						#include <torch/torch.h>
						
						using namespace std;
						
						int main()
						{
						    torch::Tensor tensor = torch::rand({2, 3});
						    cout << tensor << endl;
						    cout << torch::hypot(torch::tensor(1.),torch::tensor(1.))<< endl;
						
						    auto t = torch::ones({3, 3}, torch::dtype(torch::kFloat32));
						    cout << "t:\n" << t << endl;
						    cout << "t.exp():\n" << t.exp() << endl;
						        
						    return 0;
						}
						

						
						cmake_minimum_required(VERSION 3.0 FATAL_ERROR)
						project(example-app)
						
						set(CMAKE_SYSTEM_NAME Linux)
						set(CMAKE_SYSTEM_PROCESSOR arm)
						set(CMAKE_C_COMPILER clang)
						set(CMAKE_CXX_COMPILER clang++)
						
						find_package(Torch REQUIRED)
						set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} ${TORCH_CXX_FLAGS}")
						
						add_executable(example-app example-app.cpp)
						target_link_libraries(example-app "${TORCH_LIBRARIES}")
						set_property(TARGET example-app PROPERTY CXX_STANDARD 14)