Environment variables inside the main fuction

veryqtperson

I was watching this video: QtWS15- Effective QML, and speaker (Thomas) said that you cannot set environment variables inside the main function.

But I have them there and they do work:

int main(int argc, char *argv[])
{
    // here's the environment variable
    qputenv("QSG_VISUALIZE", "overdraw");

    QCoreApplication::setAttribute(Qt::AA_EnableHighDpiScaling);
    QGuiApplication app(argc, argv);

    QQmlApplicationEngine engine;
    engine.load(QUrl(QLatin1String("qrc:/main.qml")));

    return app.exec();
}

Has something changed for the last year? Or I don't understand something?

hskoglund

Hi, I think he's referring to when you have statically declared class instances, the constructors for them are run before your main() starts.