Re: When/how is global "errno" variable from reent.c to be used?

Grant Edwards via Newlib <[email protected]> Fri, 16 Oct 2020 18:10:34 -0000 (UTC)

Newsgroups	gmane.comp.lib.newlib
Message-ID	<[email protected]>

On 2020-10-16, Richard Damon <[email protected]> wrote:

> Software the explicitly declares errno as
> extern int errno;
> is broken, and violates the C standard, and creates explicitly stated
> Undefined Behavior.

So the LWIP source is just plain wrong.

What is the global 'int errno' exported by reent.c for?

--
Grant