This is basically the best way I've seen to do this with pure Make, though I don't think it will work on macOS or even MSYS2 because even if you install pkg-con

This is basically the best way I've seen to do this with pure Make, though I don't think it will work on macOS or even MSYS2 because even if you install pkg-config I don't think anything will provide definitions for OpenGL. (That's part of the reason I picked it; OpenGL is a really annoying edge case, since every platform went about it a little differently, and yet it is a common thing to need to link to.)