Undefined symbols for architecture x86_64 with Qt create-CodePudding

So I'm attempting to push data to a database for a game but i keep receiving an "Undefined symbols for architecture x86_64" error. I am rather new to c (just learnt today so id appreciate any help, either towards fixing my error or any code etiquette i should know. Here is the database handler .cpp:

#include "databasehandler.h"
#include "global_objects.hpp"
#include <QNetworkRequest>
#include <QDebug>
#include <QJsonDocument>
#include <QVariantMap>
#include <iostream>

DatabaseHandler::DatabaseHandler(QObject *parent) : QObject(parent)
{
    m_networkManager = new QNetworkAccessManager ( this );
    QVariantMap newUser;
    newUser[ "Stress" ] = QString::number(stressed);
    newUser[ "Sleep" ] = QString::number(tired);
    newUser[ "Hungry" ] = QString::number(hungry);
    newUser[ "Happy" ] = QString::number(happy);
    newUser[ "Grade" ] = QString::number(grade);
    newUser[ "Date" ] = "1/10/21";
    newUser[ "Gender" ] = QString::number(gender);
    newUser[ "Aid" ] = QString::number(help);
    QJsonDocument jsonDoc = QJsonDocument::fromVariant( newUser );

    QNetworkRequest newUserRequest( QUrl( "url.json"));
    newUserRequest.setHeader( QNetworkRequest::ContentTypeHeader, QString( "application/json" ));
    m_networkManager->post( newUserRequest, jsonDoc.toJson() );

}

DatabaseHandler::~DatabaseHandler()
{
    m_networkManager->deleteLater();
}

void DatabaseHandler::networkReplyReadyRead()
{
    qDebug() << m_networkReply->readAll();
}

Global objects .hpp:

#define GLOBAL_OBJECTS_HPP

extern int happy;
extern int happy;
extern int hungry;
extern int tired;
extern int stressed;
extern int gender;
extern bool help;
extern int grade;


#endif // GLOBAL_OBJECTS_HPP

global objects .cpp:


namespace
{
    int happy;
    int hungry;
    int tired;
    int stressed;
    int gender;
    bool help;
    int grade;
}

and checkinapp.cpp:

#include "checkinapp.h"
#include "ui_checkinapp.h"
#include "databasehandler.h"
#include "global_objects.hpp"
#include <QNetworkRequest>
#include <QDebug>
#include <QJsonDocument>
#include <QVariantMap>
#include <iostream>

using namespace std;

checkinapp::checkinapp(QWidget *parent)
    : QMainWindow(parent),
    ui(new Ui::checkinapp)
{
    ui->setupUi(this);
}

checkinapp::~checkinapp()
{
    if(help == 0)
    {
        delete ui;
    }
    if(help == 1)
    {
        cout << "help";
    }
}

void checkinapp::on_happy_valueChanged(int value)
{
    happy = value;
}

void checkinapp::on_hungry_valueChanged(int value)
{
    hungry = value;
}


void checkinapp::on_sleep_valueChanged(int value)
{
    tired = value;
}


void checkinapp::on_stress_valueChanged(int value)
{
    stressed = value;
}


void checkinapp::on_male_toggled(bool checked)
{
    if(checked == true)
    {
        gender = 0;
    }
}

void checkinapp::on_female_toggled(bool checked)
{
    if(checked == true)
    {
        gender = 1;
    }
}

void checkinapp::on_other_toggled(bool checked)
{
    if(checked == true)
    {
        gender = 2;
    }
}

void checkinapp::on_help_toggled(bool checked)
{
    if(checked == true)
    {
        help = 1;
    }
}

The error says the following:

error photo

.pro file:

QT  = network

greaterThan(QT_MAJOR_VERSION, 4): QT  = widgets

CONFIG  = c  11 console

# You can make your code fail to compile if it uses deprecated APIs.
# In order to do so, uncomment the following line.
#DEFINES  = QT_DISABLE_DEPRECATED_BEFORE=0x060000    # disables all the APIs deprecated before Qt 6.0.0

SOURCES  = \
    databasehandler.cpp \
    global_objects.cpp \
    main.cpp \
    checkinapp.cpp

HEADERS  = \
    checkinapp.h \
    databasehandler.h \
    global_objects.hpp

FORMS  = \
    checkinapp.ui

# Default rules for deployment.
qnx: target.path = /tmp/$${TARGET}/bin
else: unix:!android: target.path = /opt/$${TARGET}/bin
!isEmpty(target.path): INSTALLS  = target

CodePudding user response：

As Botje said in the comments dropping the namespace{} from globalvarible.cpp fixed it.