Well, this one is simple. I was reading Beej’s guide to C programming, and learned it’s possible to read C compiler’s documentation using man pages like: man 3 printf But to my surprise I got: ❯ man 3 printf No manual entry for printf in section 3 And it turned out to enable it, I needed to, add the following packages to my system: glibcInfo # look out for the capital `I` man-pages