【Qt】Qt5.14.2 configure yaml-cpp

written in front

This article is to configure the third-party library yaml in Qt create. The compiler uses MinGW32 (not vs)

1. System environment

Here I only describe the environment I used when configuring

win11 64 bit
Qt 5.14.2
yaml-cpp 0.7.0
CMake 3.23.2
Compiler: MinGW32

(yaml-cpp-master seems to have some problems. It will report an error every time it is compiled. It is recommended to use 0.7.0)

Regarding configuring MinGW32, please see my other article, point 2: Configuring environment variables

2. Download yaml-cpp 0.7.0

Download yaml-cpp from Github
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and unzip it, open the unzipped directory, and create a new buildfolder named inside.

3、CMake

Open camke-gui

①Select directory:

My path here is:

# Where is the source code:
H:/google_download/yaml-cpp-yaml-cpp-0.7.0

# Where to build the binaries:
H:/google_download/yaml-cpp-yaml-cpp-0.7.0/build

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! ! ! Notice! ! !
The following paths were originally written based on yaml-cpp-master. Please change it to yaml-cpp-yaml-cpp-0.7.0 now.

②Configure option

Click configure
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then select
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Compilers

# C
D:/software/Qt/Qt5.14.2/Tools/mingw730_64/bin/gcc.exe

# C++
D:/software/Qt/Qt5.14.2/Tools/mingw730_64/bin/g++.exe

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Click Finish and don't worry if it

appears in red. When you see it, Configuring doneclick Generate to turn off cmake-gui.

Generating done

4. Compile

buildEnter the folder we just created , and you will see the content output by CMake just now.
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Place the mouse in the folder interface, hold down the shift key, and right-click the mouse at the same time. Click to open the Powershell window(s) here, enter Windows Powershell and enter the following

command, and press Enter to execute the command.

mingw32-make -j 8

The purpose here -j 8is to allow the CPU to perform multi-tasking and speed up compilation. Make settings according to your computer's configuration.
Wait for the terminal to finish running. . . . . . . . .
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You can buildsee it in the folder libyaml-cpp.a. This is the file we need to use later.

There is another folder that needs to be used, which is in the yaml-cpp-master directory.include

5. Test with Qt

①Create a new Qt project

Create a new project in Qt Create and follow the normal process. When selecting kits, be sure to select MinGw 64.
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②Move xxx.a file

libCreate a new folder in the Qt project directory and put
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what we just generated libyaml-cpp.ainto it.

③Add yaml-cpp

Add the following content to xxx.prothe file
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and modify it according to your actual situation: INCLUDEPATH is the folder
we just mentioned , which is in the yaml-cpp-master directory.includeinclude

INCLUDEPATH += H:\google_download\yaml-cpp-master\include

LIBS += $$PWD/lib/libyaml-cpp.a

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④Execute qmake

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⑤Test

First prepare a yaml file, test.yamlthe content is:

name: Hunzi
num: 123

Import the header file in mainwindow.cpp

#include "yaml-cpp/yaml.h"
using namespace YAML;

In the constructor write:

Node config;
try{
    
    
    config = LoadFile("H:/TempFiles/test.yaml");
} catch(BadFile &e) {
    
    
    qDebug() <<"read error!";
}
qDebug() << "name:" << QString::fromStdString(config["name"].as<std::string>()) << endl;
qDebug() << "num:" << config["num"].as<int>() << endl;

⑥Check the kit

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⑦Run

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question

If the kit is not chosen by me MingGW 64, for example, if I choose it here, MSVC2017 64
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you only MingGW 64need to change it back.

At this point, Qt5.14.2 configuration yaml-cpp is completed.