Since you’re asking, $@ is the “target” of the build, that is, what you are aiming to build (left of the colon in the rule). This is why it looks like a bullsey

Since you’re asking, $@ is the “target” of the build, that is, what you are aiming to build (left of the colon in the rule). This is why it looks like a bullseye. And $< is of course the thing the target depends on. It’s the input, like standard Unix notation for stdin. Hopefully this helps?