Simple qt6/qt5 program

CMakeLists.txt

cmake_minimum_required(VERSION 3.16)

# Set the project name and version
project(HelloWorld VERSION 1.0 LANGUAGES CXX)

# Find the Qt package
option(USE_QT6 "ON for Qt6, OFF for Qt5" ON)
if(USE_QT6)
    find_package(Qt6 REQUIRED COMPONENTS Widgets)
else()
    find_package(Qt5 REQUIRED COMPONENTS Widgets)
endif()

# Add the main.cpp file to the project
add_executable(HelloWorld main.cpp)

# Link the Qt6 Widgets library to the project
target_link_libraries(HelloWorld PRIVATE Qt::Widgets)


add_executable(printprefixpath printprefixpath.cpp)
target_link_libraries(printprefixpath PRIVATE Qt::Widgets)

main.cpp

#include <QApplication>
#include <QPushButton>

int main(int argc, char *argv[]) {
    QApplication app(argc, argv);

    QPushButton hello("Hello World");
    hello.resize(100, 30);
    hello.show();

    return app.exec();
}

printprefixpath.cpp

#include <QCoreApplication>
#include <QLibraryInfo>
#include <QDebug>

int main(int argc, char *argv[])
{
    QString prefixPath = QLibraryInfo::location(QLibraryInfo::PrefixPath);
    qDebug() << "PrefixPath:" << prefixPath;

    return 0;
}