My first reply somehow got blocked :-)
>Hey Felipe,
there's a lot of documenation in the WEB and GCC documents.
Here are some links:
This is a good starting point:
http://www.linuxjournal.com/article/7884
The information in this article is a bit out-dated, but nevertheless
really useful. Further information is then available in the gcc-wiki
http://gcc.gnu.org/wiki and the GCC internals document
http://gcc.gnu.org/onlinedocs/gccint/
Furthermore, I currently try to assemble some of the information about
GCC front-ends here http://blog.lxgcc.net, but I'm not yet too far, but
if you're interested in a hopefully working front-end skeleton, check
out this file from the above web site:
http://blog.lxgcc.net/wp-content/uploads/2010/04/SFE-4.4.x-skeleton.tar.gz
Best regards,
Andi