Quinck and dirty swig-based lua binding for freetype on a Linux box.
You need freetype-2.4.9
(even if on Friday 16 June there is a new version of freetype)
development files, Lua development files and swig 2.0.6 or later.

You can give it  try with

DIR=/usr

gcc -Wall -fPIC -I. -c freetype_wrap.c -I$DIR/include  -I$DIR/include/freetype2 -I/usr/include/lua5.1 -o freetype_wrap.o

rm -vf freetype.so

gcc -Wall -shared -I. -I$DIR/include -I$DIR/include/freetype2 -I/usr/include/lua5.1 -L. -L$DIR/lib  freetype_wrap.o  -lfreetype -lm  -lz -lbz2  -o freetype.so

strip --strip-unneeded freetype.so

lua -e 'require("freetype")'


The bash script 
build-freetype.sh

build all starting from freetype.i .