It compiles the kernel and my big projects, but I haven't released it yet.

Feature wise I don't do bitint, decimal and FloatX. No auto-vectorization, but better than most simd/neon projects, which don't use __attribute__((vector_size(N))). Manual vectorization.

no sanitizers nor flto.

rcc is for the people who want to compile their projects sanily, and fast. And who want to find unicode attacks. And for those who run into tcc bugs, there are many still. gcc and clang are insanily slow.