Connect signal of superclass of object - c++

Question

I am working with a QProcess and have connected QProcess's signal readyReadStandardOutput().
That process normally spits out data to the console regularly, but the readyReadStandardOutput() seems to batch results and only emit every half a minute or so (with all accumulated data).
I want to access the "live feed" of the QProcess so I thought maybe QProcess's superclass QIODevice has some other signals.
Other solutions instead of using bytesWritten are also welcome
Now I'm trying to connect bytesWritten, but it doesn't let me.
Code:
void MainWindow::on_Program_clicked() {
program= new QProcess(this);
QString file = "../folder/program/program.exe";
QString directory = "../folder/program/";
//qint64 pid;
program->setWorkingDirectory(directory);
program->start(file, {""});
program->waitForStarted();
connect(program, SIGNAL(readyReadStandardOutput()), this, SLOT(readOutput()));
//ERROR: "QObject::connect: No such signal QProcess::bytesWritten() in ..\---\mainwindow.cpp:45
connect(program, SIGNAL(bytesWritten()), this, SLOT(myBytesWritten()));
}
void MainWindow::myBytesWritten() {
QProcess *program = dynamic_cast<QProcess *>(sender());
QByteArray outData = program->readAll();
qDebug() << "DEBUG: " + outData;
}
//Works, but only emits a signal every so often, and not every time a new line is written to the console as when I launch the exe normally
void MainWindow::readOutput(){
QProcess *program = dynamic_cast<QProcess *>(sender());
QByteArray outData = program->readAll();
qDebug() << "DEBUG: " + outData;
}

Answer 1

If you want to use the old, deprecated way of connecting signals to slots, you need to also include the parameter list:
connect(program, SIGNAL(bytesWritten(int)), this, SLOT(myBytesWritten()));
Or you can just use the modern, compile-time Qt5 way:
connect(program, &QProcess::bytesWritten, this, &MainWindow::myBytesWritten);
Also note that bytesWritten fires when a write command from YOUR end has succeeded. You don't seem to be sending any input so this will never fire.