[vlovich123]

I suspect the “trust” is a reference to Ken Thompson’s Turing Award speech “Reflections on trusting trust” where he laid out the concern of a back door in a compiler that survives updates to the compiler. In other words, the compiler injects a back door into future versions of itself in addition into your programs that source level analysis of the code will never reveal.

I think the pitch here is that it can compile TCC which can then compile GCC which makes it much more difficult for a backdoor to survive potentially, especially if the shell code is easier to read and verify than the corresponding assembly.

Within that context, an incomplete libc is irrelevant.