Error during Open Cascade .configure

[Richard Burton]

I'm trying to install "Open Cascade" CAD software. During .configure I get the 
following error.
OS: Fedora F15.

How do I fix this?

checking X11/extensions/transovl.h usability... no
checking X11/extensions/transovl.h presence... no
checking for X11/extensions/transovl.h... no
checking X11/extensions/readdisplay.h usability... no
checking X11/extensions/readdisplay.h presence... no
checking for X11/extensions/readdisplay.h... no
checking X11/extensions/multibuf.h usability... no
checking X11/extensions/multibuf.h presence... yes
configure: WARNING: X11/extensions/multibuf.h: present but cannot be compiled
configure: WARNING: X11/extensions/multibuf.h: check for missing prerequisite 
headers?
configure: WARNING: X11/extensions/multibuf.h: proceeding with the 
preprocessor's result
configure: WARNING:     ## ------------------------------------ ##
configure: WARNING:     ## Report this to address@hidden ##
configure: WARNING:     ## ------------------------------------ ##
checking for X11/extensions/multibuf.h... yes