CDBS and other build systems
During the implementation of build/import helpers for Eclipse plugins (http://debian-eclipse.wfrag.org/), I've found that the CDBS (Common Debian Build System) can be helpful in my case.
The problem is I can't find thorough documentation or some kind of "How To" there I can find how to write these extensions. Although they just simply pieces of make-files, I find it difficult to start understanding them. For example, the diffirence between "rule" and "class" are not very clear for me.
Could anybody point me to some documentation or example of writing custom rules/classes for CDBS?
BTW, is there other build systems like CDBS?