Cool! And I do think the world needs more C compilers. There is so much you could do with this language, but it needs to be disentangled from the C++ compiler behemoths. (yes, I now that there are other small C compilers)
What we need is safety improvements in C, we already have enough security exploits in the standard library, strings and arrays, no need for more, without fixing what is broken since 1979 (lint birth year).
There is the TCC. Adapting that would probably be a faster path to a full featured C compiler on esp32 than building up my xcc700. This is more of an educational sandbox project.