Read the install instruction of VFlib 3.6.
(If you want to use xgdvi, you must install GTK+ 1.2 and GNU gettext. Install them before you compile TeX-Guy.)
% below is a prompt of a shell.)
% gzip -cd < TeX-Guy-1.3.2.tar.gz | tar xvf -
% cd TeX-Guy-1.3.2
configure-site script.
It is a shell script to invoke configure script
with some important options.
If youd don't like settings in configure-site,
modify it according to your system environment, or
manually run configure with options.
% ./configure-site
make to compile.
% make
% su Password: XXXXXXX (type the password for root user) # make install # exit %
That's it!