hi all,

i am trying to build the example "helloGL" but when building it is giving me these errors.

Qt Code: 
  1. /home/adrian/Qdevelop/opengl/glwidget.cpp:176: undefined reference to `QGLWidget::qglColor(QColor const&) const'
  2. /home/adrian/Qdevelop/opengl/glwidget.cpp:178: undefined reference to `glVertex3d'
  3. /home/adrian/Qdevelop/opengl/glwidget.cpp:179: undefined reference to `glVertex3d'
  4.  
  5. glwidget.o: In function `GLWidget::resizeGL(int, int)':
  6. /home/adrian/Qdevelop/opengl/glwidget.cpp:90: undefined reference to `glViewport'
  7. /home/adrian/Qdevelop/opengl/glwidget.cpp:92: undefined reference to `glMatrixMode'
  8. /home/adrian/Qdevelop/opengl/glwidget.cpp:93: undefined reference to `glLoadIdentity'
  9. /home/adrian/Qdevelop/opengl/glwidget.cpp:94: undefined reference to `glOrtho'
  10. /home/adrian/Qdevelop/opengl/glwidget.cpp:95: undefined reference to `glMatrixMode'
  11. /home/adrian/Qdevelop/opengl/glwidget.cpp:78: undefined reference to `glClear'
  12. /home/adrian/Qdevelop/opengl/glwidget.cpp:79: undefined reference to `glLoadIdentity'
  13. /home/adrian/Qdevelop/opengl/glwidget.cpp:80: undefined reference to `glTranslated'
  14. /home/adrian/Qdevelop/opengl/glwidget.cpp:81: undefined reference to `glRotated'
  15. /home/adrian/Qdevelop/opengl/glwidget.cpp:82: undefined reference to `glRotated'
  16. /home/adrian/Qdevelop/opengl/glwidget.cpp:83: undefined reference to `glRotated'
  17. /home/adrian/Qdevelop/opengl/glwidget.cpp:24: undefined reference to `glDeleteLists'
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etc etc......

i have already pointed to QtOpenGl folder.
any ideas??
thanks

adrian