Yes, read this https://github.com/oriansj/M2-Planet https://github.com/oriansj/M2-Planet and you will know how a cross platform self-hosting C compiler works

Yes, read this https://github.com/oriansj/M2-Planet https://github.com/oriansj/M2-Planet and you will know how a cross platform self-hosting C compiler works in 1,982 lines of code and if you want to know how an assembler works read this: https://github.com/oriansj/mescc-tools/ https://github.com/oriansj/mescc-tools/ only about 562 lines for the linker, 645 for the macro assembler and 204 lines if you want dwarf stubs in your binaries. Oh and it is cross platform too