[Yen]

But in order to create a disguised compiler, you need to know what method a compromised system uses to decide whether something is a compiler.

i.e., you actually have to have an example of a compromised compiler, which pretty much solves the problem in the first place.

If you decidedly don't-trust the only compiler on your system, and don't trust outside sources, the only solution is to hand-assemble a new compiler on the system, and hope that at least the hardware is trustworthy. which it isn't, necessarily.