That should be part of libc 5.3, which would be hell to install side-by-side whichever version you currently have. Not a rabbit-hole to go down lightly.
Maybe an old (2011-ish) Linux distro in a VM would be the way to go. If you want the effort. (I obviously don't feel like pursuing it myself).
Hmm, unfortunately I don't have the time right now, as I have to go. I'll leave my computer on, though, so if someone wants to help out, you can access it through tmate at https://tmate.io/t/f9Z36rpEkS8CSsHxwpZGlAl1d.
The few files I have are on a dir on my desktop, the superuser password is passw0rd. Thanks!
I think that the original squake was written against svgalib. So the ttyquake package contains a libvga that's probably a shim, translating the output to aalib.
Most Quake ports use OpenGL, SDL, etc for graphics, and won't work directly with the ttyquake files. Which is why I described using sdlquake to achieve the same effect, in my other comment.
[0] http://quakeone.com/q1files/downloads/