I now have a full-time Linux box to use for development.
I'm running RedHat 7.0. I successfully built the version
2.5 GLTT distribution against the latest stable FreeType
distribution, version 1.3.1.
I had to make the following tweak to get it to compile:
diff GLTTGlyphPolygonizer.C /usr/local/src/gltt-2.5/
< typedef void CALLBACK (*glu_callback)(CALLBACKARG);
> typedef void (*glu_callback)();
> // typedef void CALLBACK (*glu_callback)(CALLBACKARG);