undefined reference on emit function

JuanNunez

Hello, I have a proyect with a thread and a listWidget, the problem is when I use emit, the error is: "undefined reference to `hiloDelSocket::datos(QString)'", but I declered it on the header.

void hiloDelSocket::run(){
    ZeroMemory(buffer,12);
    recv(sock,buffer,12,0);
    const QString a = buffer;
    emit datos(a); //error
}

//header
class hiloDelSocket: public QThread
{

    Q_OBJECT //I have to use it because otherwise it gives me other error

public:
    hiloDelSocket(QObject *parent = nullptr);

signals:
    void datos(const QString); //here is declarated

protected:
    void run() override;

private:
    char buffer[12];
    SOCKET sock;

};

jsulm

This post is deleted!

SGaist

Hi,

The usual signature of the such a signal is rather a const reference and not a const object.

jsulm

@JuanNunez I deleted my first response as I did not realised that it was about a signal and one does not have to implement a signal.
Did you try a complete rebuild after adding signal? Delete build folder, run qmake and build.