So I was building a simple program, and I noticed that -lm (linking in the math library) doesn’t work. Well it appears that MiNT doesn’t have a normal math library, it’s called pml. I guess it’s a “portable math library”?

At any rate simply copying the /usr/lib/pml.olb to /usr/lib/m.olb allows you to keep on trucking.
More fun later.