zamalek got it correct above. Those languages above only cover 2 or 3 architectures that the project works with. There is no Rust or Go compiler for vax, alpha, macppc, sparc64. There are C/C++ compilers though.
There is no Rust or Go compiler for vax, alpha, macppc, sparc64. There are C/C++ compilers though.
Well, I think compilers for some of these architectures (e.g. VAX and Alpha) still exist in gcc largely because OpenBSD and NetBSD have put so much effort in keeping them alive (yes, I know that OpenBSD is using an older version). So, it's not as if you get C compilers for these platforms for free.
(Also, not really advocating the use of Go to replace C in operating system development, just wanted to make a note)