Compile error with OpenGL: How to set parameter compilation project QtCreator 2.6.0

[giorgik]

Hello to all. I have a project that uses calls to OpenGL, in particular, I'm:

static GLUtesselator *tobj = NULL;
tobj = gluNewTess();
gluTessCallback(tobj, GLU_TESS_VERTEX,    (GLvoid (*) ()) &glVertex3dv);
...

static GLUtesselator *tobj = NULL;
tobj = gluNewTess();
gluTessCallback(tobj, GLU_TESS_VERTEX,    (GLvoid (*) ()) &glVertex3dv);
...

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compiling I get this error message:

C:\Qt\progetti\AreaRobot\blockgroup.cpp:187: error: invalid conversion from 'GLvoid (*)() {aka void (*)()}' to '_GLUfuncptr {aka void (*)()}' [-fpermissive]

C:\Qt\progetti\AreaRobot\blockgroup.cpp:187: error: invalid conversion from 'GLvoid (*)() {aka void (*)()}' to '_GLUfuncptr {aka void (*)()}' [-fpermissive]

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I do not know how I can correct the error, can you help me ?