I can't tell what this person wants from the blog post, but for really advanced use of GNU Make you can see either my old Ask Mr Make column (<a href="http://www.jgc.org/blog/2010/01/update-list-of-my-gnu-make-articles.html" rel="nofollow">http://www.jgc.org/blog/2010/01/update-list-of-my-gnu-make-a...</a>) or my book (<a href="http://www.lulu.com/content/2584447" rel="nofollow">http://www.lulu.com/content/2584447</a>).