Or trust the source code of a simpler compiler that is able to compile the untrusted compiler: <a href="http:&#x2F;&#x2F;www.dwheeler.com&#x2F;trusting-trust&#x2F;" rel="nofollow">http:&#x2F;&#x2F;www.dwheeler.com&#x2F;trusting-trust&#x2F;</a>