Stage0 – A set of minimal C compiler bootstrap binaries
Does it support all of C?Is this actually smaller than TCC?  It's kind of hard to tell since TCC is split into files and I don't know what's actually necessary.  And that question includes earlier, less featureful versions of TCC.  Note that the more-or-less-C compiler it's based off of is absolutely miniscule: https://bellard.org/otcc/