Thank you! I have read its first page, the only thing that I would not choose is the use of llvm - but I will try that, anyway. llvm is something that have been close to me for sometime...

"gnuu" is a domain I have not seen before. Funny...

These are among the various (widely-held ...) sentiments that prompt me to encourage you to "use the Source, Luke!"

I have read a great many books on compilers, and, with the possible(??) exception of Aho's book, I have yet to read a single decent one.

Therefore, I say, Get Jiggy Wit It, as soon as possible. Surf GitHub for existing projects which actually(!) use(!!) Bison. Find their grammar files, and the associated code which uses the Bison-generated parser. "This is the Real Deal, baby!"

Take the output of the Bison step and actually look at it. Study the actual source-code of the runtime engine. Rip the hood and both fenders off of the damned thing, and look at it, until you can see for yourself how it actually w-o-r-k-s.

You've spent more than enough time "reading books about swimming." Go find some actual examples. Then, after tightly securing your life-vest and your foam noodles, get into the water!