openGL in Mingw5.3 in Qt.5.11 error: undefined reference to `_imp__glBegin@4'

[mr ZX]

hi
I'm using Qt 5.11 and mingw5.3_32bit
i wont using openGl object like QOpenGLWidget or QGL Widget
i give error like :
D:\web_for_up\mrzx-website\qt\MRZX_ir_2\myMenu\myMenu\myglwidget.cpp:14: error: undefined reference to `_imp__glClearColor@16'

D:\web_for_up\mrzx-website\qt\MRZX_ir_2\myMenu\myMenu\myglwidget.cpp:28: error: undefined reference to `_imp__glBegin@4'
...
how to fi this?

#ifndef MYGLWIDGET_H
#define MYGLWIDGET_H

#include <QOpenGLWidget>

class myGLWidget: public QOpenGLWidget
{
    Q_OBJECT
public:
    myGLWidget(QWidget *parent=0);
protected:
    void initializeGL();
    void resizeGL(int w, int h);
    void paintGL();

};

#endif // MYGLWIDGET_H

#include <QtWidgets>
#include "myglwidget.h"
#include <QtOpenGL>
myGLWidget::myGLWidget(QWidget *parent):
    QOpenGLWidget(parent)
{

}

void myGLWidget::initializeGL()
{
     glClearColor(1.0f, 1.0f, 0.0f, 1.0f);

}

void myGLWidget::resizeGL(int w, int h)
{
    glViewport(0, 0, w, h);
}

void myGLWidget::paintGL()
{
   glClear(GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
           glColor3f(1,0,0);
            glBegin(GL_TRIANGLES);
            glVertex3f(-0.5, -0.5, 0);
            glVertex3f( 0.5, -0.5, 0);
            glVertex3f( 0.0, 0.5, 0);
            glEnd();
}