I use a tool called "RC-WinTrans" and i love it! look at http://www.schaudin.com/ ...Publikum noch stundenlang, wartete auf Bumerang.

Hi, this is not an answer to your question, but i thought it might interest someone: I stopped using flex an bison when i discovered a tool called "COCOR". It exists for several languages and is freeware. Even src is included. It is much easier to use and produces readable code for scanners and parsers. (No more yy_ variables and functions :-D ) Look at http://cs.ru.ac.za/homes/cspt/cocor.htm watch out for the c++ version. Maybe someone likes this tool.