GNU Make is a surprisingly lisplike language. At some point I realized it had an eval function which I could use to metaprogram it. This actually ruined one of

GNU Make is a surprisingly lisplike language. At some point I realized it had an eval function which I could use to metaprogram it. This actually ruined one of my projects, I got so lost trying to create the perfect makefile system that nothing short of a rewrite would fix it. As a side effect, I finally understood what autoconf's purpose was.