[m-users.] Yet another piece for the posix library: strerror(3)

[Julien Fischer]

Hi Volker

On Sun, 27 Oct 2019, Volker Wysk wrote:

> I've extended the posix library again, this time with the strerror(3)
> call. I had to modify posix.m in order to do it.

That's not referentially transparent as the error message returned will
be affected by the current locale setting.  This can be fixed by making
the interface into:

    :- pred strerror(posix.error::in, string::out, io::di, io::uo) is det.

Julien.