qt4-mac and OpenGL

[Alexy Khrabrov]

I've got a package for graph layout visualization, called Pigale,  
which uses qt4 and GL via GLUT.  It turns out the latter wants X11,  
while I was able to get a qt4-mac port to build nicely.  Pigale builds  
fine under qt4-x11.  Now I started poking around to see how those  
things are configured, and my hunch is that I can use PKG_CONFIG_PATH  
to have only one of

/opt/local/libexec/qt4-mac/lib/pkgconfig
/opt/local/libexec/qt4-x11/lib/pkgconfig

-- and everything will be done for the right Qt flavor, right?  Pigale  
uses --with-qt-includes=... switch to its configure, and giving it  
either the Aqua's or X11's .../include/ worked to build the right  
widgets.  Apparently one can do things by QT4DIR, too -- so that would  
be the right libexec subdir then?

What I am wondering about is the GL compatibility.  Pigale uses  
libfreeglut to label the graph, and that wanted X11.  However, under / 
opt/local/Frameworks/, it turns out, qt4-mac deposits a bunch of its  
frameworks, including a QtOpenGL.  Does anyone know how those  
correspond to OpenGL, and why are the frameworks there only for qt4- 
mac and not qt4-x11?  Is it just a packaging choice to keep qt4-x11  
linuxy-like and thus framework-less?

Cheers,
Alexy