安装流程

1、下载libtorch
官方地址：https://pytorch.org/
首先在官网下载，或者用指令下载：下载自己要的对应版本
cd进入你的目录，下载到当前目录

wget https://download.pytorch.org/libtorch/cpu/libtorch-cxx11-abi-shared-with-deps-1.7.1%2Bcpu.zip

2、解压

unzip libtorch-cxx11-abi-shared-with-deps-1.7.1+cpu

3、创建项目文件夹,把libtorch放到项目目录下，文件夹下目录如下

.
├── CMakeLists.txt
└── main.cpp
└── libtorch

按照下面修改CMakeLists.txt

cmake_minimum_required(VERSION 2.8 FATAL_ERROR)
project(test-libtorch)#1
#set(Torch_DIR /kwj/aot/cpp_demo/libtorch/share/cmake/Torch) #例如
set(Torch_DIR ~/libtorch/share/cmake/Torch)  #~是解压的libtorch的绝对路径#2
find_package(Torch REQUIRED)#3
set(CMAKE_CXX_FLAGS "${CAMKE_CXX_FLAGS} ${TORCH_CXX_FLAGS}")#main.cpp exe
add_executable(test-libtorch main.cpp)#4 link libtorch .a .so
target_link_libraries(test-libtorch "${TORCH_LIBRARIES}")#5
set_property(TARGET test-libtorch PROPERTY CXX_STANDARD 14)

main.cpp

#include<torch/torch.h>
#include<iostream>
//using namespace std;
int main(){torch::Tensor tensor = torch::eye(3);std::cout << tensor << std::endl;
}

编译

mkdir build
cd build
cmake ..
make
./test-libtorch