Re: SRFI 238: Codesets

[Lassi Kortela]

If there's a need, we can have separate machine-independent linux-errno, 
openbsd-errno, cygwin-errno, etc. (as listed in 
https://misc.lassi.io/2020/errno-conflicts.text) But I think the mapping 
with the simplest name, "errno", should be for the current machine. 
Otherwise the simplest use cases have to find out what OS is underneath 
and do a case statement based on that. It all gets very complicated if 
you just want to wrap some FFI code.