You can bootstrap in any language that is widely available, so today that could be Javascript even. The biggest advantage of C as a language is, that a simple c

You can bootstrap in any language that is widely available, so today that could be Javascript even. The biggest advantage of C as a language is, that a simple compiler is very easy to write. But I would bootstrap from Lisp (Scheme). A naive interpreter can be easily implemented in assembly and then you have a nice high level language for implementing the target system.