Modelled after the cmsg tests, this wraps the C macro into a function, and then
compares the results to the Rust implementation in libc.

sock_extended_err is a struct returned as a control message when the sockopt
IP_RECVERR is set, when recvmsg has the MSG_ERRQUEUE flag set.  IP_RECVERR and
MSG_ERRQUEUE are constants both already defined here.

This moves the linux/ headers after others
This keeps the Android tests closer to the Linux ones.
I think this is needed to get linux/errqueue.h to not cause compilation
failures.

Co-Authored-By: gnzlbg <gnzlbg@users.noreply.github.com>

Signed-off-by: patrick felt <patrick.felt@sling.com>

initial work from @landryb for OpenBSD, various fixes and NetBSD support from me.

Fixes #1585

Signed-off-by: Arthur Gautier <baloo@gandi.net>

Signed-off-by: Arthur Gautier <baloo@gandi.net>

First batch for #1562

This adds libc-test support for Freebsd10 and a CI build job that tests
FreeBSD10 with LIBC_CI only.

Currently, libc supports and detects freebsd11 and freebsd13
Unknown versions, like freebsd13, is treated as freebsd11.
This patch solve the issues, detecting freebsd13 and treating it like
freebsd12.
Inverting the logic not(freebsd12) -> freebsd11 where possible

Currently, libc supports and detects freebsd11 and freebsd13
Unknown versions, like freebsd13, is treated as freebsd11.
This patch solve the issues, detecting freebsd13 and treating it like
freebsd12.
Inverting the logic not(freebsd12) -> freebsd11 where possible

These constants have already been deprecated for a few releases with
a deprecation notice, so they can finally be removed.

Closes rust-lang/libc#665

Per discussion in #1410, this is necessary to avoid struct size mismatches between Rust and C on
systems with glibc < 2.28.