with cc_* can build m2-planet, which can compile to different platforms. (m2 planet is c compiler?)
can use m2 planet to build mes (which can then self compile)
MesCC compiler (difference between this and tinycc?)
Which architectures does mescc support?
Tiny C Compiler
Which architectures does tcc support?
can use mes to build tcc (which can then self compile)
More powerful than mescc
can use mes to build meslibc
can use tcc/meslibc to build musl
can use tcc/musl to build core utils/gcc