needed modules for x-client only

[Maris]

I'm going to build a minimalistic x11 subsystem that only provides  
X-client functionality (embedded system without display), hence connecting  
to a remote display. Resources like  
http://www.linuxfromscratch.org/blfs/view/cvs/x/xorg7.html are very  
exhaustive, and from there I can get a rough idea of modules needed:

proto-headers, libXdmcp, xorg libs, fontconfig
? libxcb ?

I'd appreciate to find/get a more precise list (or a link).

Eventually, a Window manager runs at the remote display unit and no auth.  
or security stuff is necessary.

-Rob