Ubuntu 18.04 install Qt 5.12.9和libtorch 1.5.1_linux cmake qt libtorch

1. qt 下载地址： http://download.qt.io/archive/qt/5.12/

以前版本的qt 安装可以不登录账号，这次没看到skip按钮，登陆下账号然后正常安装即可，选择下 desktop gcc，其他的组件根据自己需求。

2. libtorch下载地址：https://download.pytorch.org/libtorch/cpu/libtorch-shared-with-deps-1.5.1%2Bcpu.zip

下载之后解压即可

3. qt 创建 non-qt project C++工程，由于是创新CMake工程，如果没有安装需要安装下。

工程命名为libtorch

main.cpp

#include <iostream>
#include <torch/torch.h>
 
using namespace std;
 
int main()
{
    torch::Tensor tensor = torch::eye(3);
    std::cout << tensor << std::endl;
    cout << "Hello World!" << endl;
    return 0;
}

CMakeLists.txt

cmake_minimum_required(VERSION 3.5)
 
project(libtorch LANGUAGES CXX)
 
set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)
 
set(Torch_DIR /home/whq/Downloads/libtorch/share/cmake/Torch)
find_package(Torch REQUIRED)
 
add_executable(libtorch main.cpp)
target_link_libraries(libtorch "${TORCH_LIBRARIES}")
set_property(TARGET libtorch PROPERTY CXX_STANDARD 17)

运行结果：