Fil-C is basically an alternate ABI and libc runtime. Otherwise it is not tied to C and I see no reason it couldn't be targeted by Rust or Zig.
It currently is at least associated with C in the sense that it takes C code as an input. But yes, I would be very happy to see its approach applied to more languages.
It currently is at least associated with C in the sense that it takes C code as an input. But yes, I would be very happy to see its approach applied to more languages.