Problem on linker.

[JonexElectronic]

Hello, I am a noob programmer and I am also new with QT. I have a problem on my code and I don't know how to resolve. Please help.

Main.cpp

#include <QCoreApplication>
#include <QDebug>
#include "persona.h"
int main(int argc, char *argv[])
{
    QCoreApplication a(argc, argv);
    QObject *p = new QObject;
    Persona* Juan = new Persona(p);
    Juan->setNombre("Juan");

    qDebug() << Juan;
    
    delete p;
    return a.exec();
}
--------------------------------------------------------------

persona.h

-------------------------------------------------------------
#ifndef PERSONA_H
#define PERSONA_H

#include <QObject>

class Persona : public QObject
{
    Q_OBJECT
public:
    explicit Persona(QObject *parent = nullptr);

    void setNombre(const QString &nombre);

    void habla(const QString &palabra);

    friend inline QDebug operator<<(QDebug qd, Persona *p);

signals:
    void hablo(QString);
public slots:
    void escucha(const QString &palabra);
private:
    QString m_nombre;
};

#endif // PERSONA_H
---------------------------------------------------

persona.cpp

#include "persona.h"
#include <QDebug>

Persona::Persona(QObject *parent) : QObject(parent)
{

}

void Persona::setNombre(const QString &nombre){
    m_nombre = nombre;
}

void Persona::habla(const QString &palabra){
    qDebug() << m_nombre << "Dice " << palabra;
    emit hablo(palabra);
}

void Persona::escucha(const QString &palabra){
   qDebug() << m_nombre << "Ha escuchado" << palabra;
}

inline QDebug operator<<(QDebug qd,  Persona *p){
    return qd << "El nombre es: " << p->m_nombre;
}

---

problems:
main.obj:-1: error: LNK2019: unresolved external symbol "class QDebug __cdecl operator<<(class QDebug,class Persona *)"
debug\newoperator.exe:-1: error: LNK1120:

Thanks

[Christian Ehrlicher]

remove the inline from the operator since it's not inline.

[JonexElectronic]

@Christian-Ehrlicher Thanks!!