I don't know TeXmaker, but it's highly unlikely that you can't compile this with any normal TeX distribution. It's not a LaTeX file though, it's a TeXinfo file

I don't know TeXmaker, but it's highly unlikely that you can't compile this with any normal TeX distribution. It's not a LaTeX file though, it's a TeXinfo file but since it includes the texinfo.tex file it shouldn't matter, you can run it like any plain TeX document. It uses texindex but that's included both in TeX Live and MikTeX, so you probably have it installed already. Just run on some kind of command line > pdftex c.texi > texindex c.cp > texindex c.fn > pdftex c.texi > pdftex c.texi