The QtStartUpFunction function may be called repeatedly

#include <qpa/qplatformintegrationplugin.h>
#include <qpa/qplatformintegration.h>
#include <private/qgenericunixeventdispatcher_p.h>
#include <QCoreApplication>
#include <QDebug>

static void test_qAddPreRoutine() {
    qDebug() << Q_FUNC_INFO;
}
Q_COREAPP_STARTUP_FUNCTION(test_qAddPreRoutine)

class Test : public QPlatformIntegration {
public:
    QPlatformBackingStore *createPlatformBackingStore(QWindow *) const override  {
        return nullptr;
    }
    QPlatformWindow *createPlatformWindow(QWindow *window) const override {
        return nullptr;
    }
    QAbstractEventDispatcher *createEventDispatcher() const override {
        return createUnixEventDispatcher();
    }
};

class TestPlugin : public QPlatformIntegrationPlugin {
    Q_OBJECT
    Q_PLUGIN_METADATA(IID QPlatformIntegrationFactoryInterface_iid FILE "test.json")
public:
    QPlatformIntegration *create(const QString&, const QStringList&, int &, char **) override {
        return new Test();
    }
};

#include "main.moc"