Any Linux based macro system for G code generation

Being a newbie to the CNC world, but not to Linux world or programming languages, I wonder: is there some higher level macro system for generating G code? Kind like C preprocessor or assembler macros? Ergo can I find some macro system for typical milling tasks like milling out a rectangular pocket or something?

Another question, if I get an outline font (say in BDF format or whatever), is there some way to mill any given text for a given font size? A bonus would be to make raised letters.

Thanks!

Guys, after some looking, I have decided to write my own perl module for generating G codes. If it works well for me, I may release it through CPAN under GPL. I will use building blocks principle. A well written function to drill a hole would be used to make a bolt hole pattern, etc.

Igor