Required extension to built:
compiletc.tcz
ocaml-dev.tcz
lablgtk-dev.tcz



Notes:
tar -xvf unison-2.40.63.tar.gz
edit ./Makefile
	replace "INSTALLDIR = $(HOME)/bin/" with "INSTALLDIR = /usr/local/bin/"
make
sudo make install

I try to make command line version with "make UISTYLE=text" as written on the site but does not work

Additional configure options:
I add pixmap from http://www.markus-gattol.name/misc/mm/si/content/unison_logo.png and scale in 48x48