QT application with opengl and GLU

[YuriyRusinov]

Hello !

I try to make QT application with OpenGL graphics. I subclass QGLWidget and try draw cylinder such this

#include <QDebug>
#include <QMouseEvent>
 
#include <GL/glu.h>
#include <GL/glu_mangle.h>
 
#include "glwidget.h"
 
...
 
void GLWidget :: paintGL (void)
{
    qDebug () << __FUNCTION__;
    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    GLUquadricObj* q = new gluNewQuadric ();
    gluCylinder (q, (GLdouble)cyl_radius, (GLdouble)cyl_radius, (GLdouble)cyl_height, 1000, 1000);
}

#include <QDebug>
#include <QMouseEvent>

#include <GL/glu.h>
#include <GL/glu_mangle.h>

#include "glwidget.h"

...

void GLWidget :: paintGL (void)
{
    qDebug () << __FUNCTION__;
    glClear (GL_COLOR_BUFFER_BIT | GL_DEPTH_BUFFER_BIT);
    GLUquadricObj* q = new gluNewQuadric ();
    gluCylinder (q, (GLdouble)cyl_radius, (GLdouble)cyl_radius, (GLdouble)cyl_height, 1000, 1000);
}

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and I receive an error

glwidget.cpp: In member function ‘virtual void GLWidget:aintGL()’:
glwidget.cpp:59: error: expected type-specifier before ‘mgluNewQuadric’
glwidget.cpp:59: error: cannot convert ‘int*’ to ‘GLUquadricObj*’ in initializat
ion
glwidget.cpp:59: error: expected ‘,’ or ‘;’ before ‘mgluNewQuadric’
glwidget.cpp:60: error: ‘mgluCylinder’ was not declared in this scope
make: *** [glwidget.o] Error 1
(3 of 7): error: expected type-specifier before ‘mgluNewQuadric’

In pro-file I write

DEPENDPATH += . \
                /usr/include/GL
INCLUDEPATH += . \
               /usr/include/GL
 
QT += opengl
 
...

DEPENDPATH += . \
                /usr/include/GL
INCLUDEPATH += . \
               /usr/include/GL

QT += opengl

...

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My platform is Gentoo Linux, QT was compiled with opengl support. Any ideas ?