#include <QApplication>

static QFile file(QStringLiteral("test.log"));

void messageHandler(QtMsgType type, const QMessageLogContext &context, const QString &message)
{
    const QString msg = qFormatLogMessage(type, context, message);

    QTextStream stream(&file);

    stream.setCodec("UTF-8");
    stream.setGenerateByteOrderMark(true);

    stream << msg << endl;
}

int main(int argc, char *argv[])
{
    if(!file.open(QIODevice::WriteOnly | QIODevice::Append | QIODevice::Text))
        return -1;

    qInstallMessageHandler(messageHandler);

    qDebug() << "test test";

    QApplication a(argc, argv);

    return a.exec();
}