Error including CGAL in CMAKE file

[DarkSun812]

I have tried to add CGAL in a project that I have in Qt6 but if I include CGAL I get an error that according to my research, is because it does not find QObject, but I am also including Core which is supposed to be where QObject goes.

CMakeLists.txt file

cmake_minimum_required(VERSION 3.5)

project(cloud_analizer VERSION 0.1 LANGUAGES CXX)

set(CMAKE_AUTOUIC ON)
set(CMAKE_AUTOMOC ON)
set(CMAKE_AUTORCC ON)

set(CMAKE_CXX_STANDARD 17)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

find_package(QT NAMES Qt6 Qt5 REQUIRED COMPONENTS Widgets Core Gui Concurrent Sql WebSockets WebChannel WebEngineWidgets WebView)
find_package(Qt${QT_VERSION_MAJOR} REQUIRED COMPONENTS Widgets Core Gui Concurrent Sql WebSockets WebChannel WebEngineWidgets WebView)

set(CGAL_DIR "C:/dev/CGAL-6.0/lib/cmake/CGAL")
find_package(CGAL REQUIRED COMPONENTS Qt6 Core)

include_directories("C:/Program Files/MySql/MySQL Server 8.0/include")
include_directories("C:/Program Files/boost/boost_1_83_0")

link_directories("C:/Program Files/MySql/MySQL Server 8.0/lib")
link_directories("C:/Program Files/boost/boost_1_83_0/lib")


set(PROJECT_SOURCES
        main.cpp
        mainwindow.cpp
        mainwindow.h
        mainwindow.ui
)

if(${QT_VERSION_MAJOR} GREATER_EQUAL 6)
    qt_add_executable(cloud_analizer
        MANUAL_FINALIZATION
        ${PROJECT_SOURCES}
        api.h api.cpp
        funciones_standar.h funciones_standar.cpp
        cloudfunctions.h cloudfunctions.cpp
        cloudserver.h cloudserver.cpp
    )
# Define target properties for Android with Qt 6 as:
#    set_property(TARGET cloud_analizer APPEND PROPERTY QT_ANDROID_PACKAGE_SOURCE_DIR
#                 ${CMAKE_CURRENT_SOURCE_DIR}/android)
# For more information, see https://doc.qt.io/qt-6/qt-add-executable.html#target-creation
else()
    if(ANDROID)
        add_library(cloud_analizer SHARED
            ${PROJECT_SOURCES}
        )
# Define properties for Android with Qt 5 after find_package() calls as:
#    set(ANDROID_PACKAGE_SOURCE_DIR "${CMAKE_CURRENT_SOURCE_DIR}/android")
    else()
        add_executable(cloud_analizer
            ${PROJECT_SOURCES}
        )
    endif()
endif()

if(CGAL_Qt6_FOUND)
  target_link_libraries(cloud_analizer PRIVATE Qt${QT_VERSION_MAJOR}::Widgets Qt6::WebView Qt6::Core Qt6::Gui Qt6::Concurrent Qt6::Sql Qt6::WebSockets Qt6::WebChannel Qt6::WebEngineWidgets mysqlclient)
  target_link_libraries(cloud_analizer PRIVATE CGAL::CGAL_Basic_viewer)
else()
  target_link_libraries(cloud_analizer PRIVATE Qt${QT_VERSION_MAJOR}::Widgets Qt6::WebView Qt6::Core Qt6::Gui Qt6::Concurrent Qt6::Sql Qt6::WebSockets Qt6::WebChannel Qt6::WebEngineWidgets mysqlclient)
  message(STATUS "NOTICE: Several examples require Qt6 and will not be compiled.")
endif()
# Qt for iOS sets MACOSX_BUNDLE_GUI_IDENTIFIER automatically since Qt 6.1.
# If you are developing for iOS or macOS you should consider setting an
# explicit, fixed bundle identifier manually though.
if(${QT_VERSION} VERSION_LESS 6.1.0)
  set(BUNDLE_ID_OPTION MACOSX_BUNDLE_GUI_IDENTIFIER com.example.cloud_analizer)
endif()
set_target_properties(cloud_analizer PROPERTIES
    ${BUNDLE_ID_OPTION}
    MACOSX_BUNDLE_BUNDLE_VERSION ${PROJECT_VERSION}
    MACOSX_BUNDLE_SHORT_VERSION_STRING ${PROJECT_VERSION_MAJOR}.${PROJECT_VERSION_MINOR}
    MACOSX_BUNDLE TRUE
    WIN32_EXECUTABLE TRUE
)

include(GNUInstallDirs)
install(TARGETS cloud_analizer
    BUNDLE DESTINATION .
    LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
    RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
)


if(QT_VERSION_MAJOR EQUAL 6)
    qt_finalize_executable(cloud_analizer)
endif()

By adding the lines

set(CGAL_DIR "C:/dev/CGAL-6.0/lib/cmake/CGAL")
find_package(CGAL REQUIRED COMPONENTS Qt6 Core)

mainwindows.h File

#ifndef MAINWINDOW_H
#define MAINWINDOW_H

#include <QMainWindow>
#include <QObject>
#include <QtWebSockets/QtWebSockets>
#include "cloudfunctions.h"

QT_BEGIN_NAMESPACE
namespace Ui {
class MainWindow;
}
QT_END_NAMESPACE
class CloudFunctions;

class MainWindow : public QMainWindow
{
    Q_OBJECT

public:

    MainWindow(QWidget *parent = nullptr);
    ~MainWindow();
private slots:
    void testSlot();


private:
    Ui::MainWindow *ui;
    CloudFunctions *mCloud;

};

class DataObject : public QObject
{
    Q_OBJECT
public:

    Q_INVOKABLE QStringList getData() const {

        return QStringList() <<"value1";
    }
};
#endif // MAINWINDOW_H

From these two lines, you start to ignore private slots: and many other lines.