None of those listed libs are included in the base. For enhancing libs, there are FLTK and imlib2, because they are light.
We have gtk1 in one extension, and gtk2+pango+cairo+atk in the gtk2 extension. Xorg includes Mesa (mesalib, mesaglut)
About pixman, do you also have the devs for it loaded? They are also in Xorg-7.4-dev.