ubuntu20.04 使用libtorch

一、官网下载文件

https://pytorch.org/get-started/locally/

选择下载Stable(1.10.1) C++ CPU(cxx 11 ABI)

解压.zip压缩包，将libtorch移动到存放第三方库的位置

二、使用

2.1 创建torch_ws文件夹，然后创建如下两文件

example-app.cpp

#include "torch/torch.h"
#include <iostream>

int main() {
  torch::Tensor tensor = torch::rand({2, 3});
  std::cout << tensor << std::endl;
}

 CMakeLists.txt

cmake_minimum_required(VERSION 3.5)
project(test_pytorch)

set(CMAKE_CXX_STANDARD 14) #设置为C++11，可能报错
set(Torch_DIR ~/third_party/libtorch/share/cmake/Torch) #确定.cmake文件的地址
find_package(Torch REQUIRED)  
message(STATUS "Torch library status:")
message(STATUS "    include path: ${TORCH_INCLUDE_DIRS}")
message(STATUS "    lib path : ${TORCH_LIBRARIES} ")

add_executable(example-app example-app.cpp)
target_link_libraries(example-app "${TORCH_LIBRARIES}")

2.2 编译运行

mkdir build
cmake ..
make