>> 2. ./configure found mpost but it's complaining about missing >> metapost CTAN package. Should I be worried about this error?
Yes, you should be worried if you are building lilypond. It means that the `mpost` binary could be found, but not its basic input files like `mfplain.mp`. >> Can I skip the error and see what happens? You won't be able to build the fonts. In case you are not building lilypond (this is, using pre-built fonts) you don't need metapost at all. Werner