Comment by astrange

> How would you integrate C3 with other programming languages (not just C)

That's the job of an FFI. The internal ABI of most languages isn't anything like their FFI, eg any garbage collected language can't use the OS "C" ABI.

Most operating systems don't use the same ABI for kernel syscalls and userland libraries either. (Darwin is an exception where you do have to link a library instead of making syscalls yourself.)

> contrary to popular belief there is no such thing as a "C ABI"

It is a "C ABI" if it has eg null-terminated strings and varargs with no way to do bounds checking.