问错误：“未定义的对‘`gluNewQuadric@0’的引用”

EN

#include <SFML/Graphics.hpp>
#include <SFML/Window.hpp>
#include <SFML/System.hpp>   
 
sf::WindowSettings Settings;
Settings.AntialiasingLevel = 2;
Settings.DepthBits = 24;
Settings.StencilBits = 8;
sf::Window  App(sf::VideoMode(1024, 768, 32), "SFML Window", sf::Style::Close, Settings);
App.SetFramerateLimit(30);
prepareGL(App.GetWidth(), App.GetHeight());
sf::Clock Clock;
App.SetActive();
// GL goes here:
GLUquadricObj *qw1 = gluNewQuadric();
gluQuadricDrawStyle(qw1,GLU_POINT);
App.Display();
while (App.IsOpened()) {
    sf::Event Event;
    while (App.GetEvent(Event)) {
        if (((Event.Type == sf::Event::KeyPressed)
            && (Event.Key.Code == sf::Key::Escape))
            || (Event.Type == sf::Event::Closed)) {
            gluDeleteQuadric(qw1);
            App.Close();
        }
        if (Event.Type == sf::Event::Resized) {
            glViewport(0, 0, Event.Size.Width, Event.Size.Height);
        }
    }
}
return EXIT_SUCCESS;