Bug#631639: __unused in libbsd. workaround for #522773 (linux) and #522774 (libc)

[Jonathan Nieder <jrnieder@gmail.com>]

Robert Millan wrote:

> The Linux patch is submitted and in ignore queue since 2009:
>
> https://bugzilla.kernel.org/show_bug.cgi?id=14186

I don't see a patch there.  Anyway, using kernel bugzilla is not a way
to get anyone to actually do anything.  The best you can hope for is
that someone will eventually forward your report as an email.

A better strategy is generally to write a patch, find the relevant
maintainers in the MAINTAINERS file or changelog and cc them (see
“6) Select your CC (e-mail carbon copy) list” in
Documentation/SubmittingPatches), resend as appropriate if they forget
about it, and act on their comments.

For the case at hand: upstream seems interested:

 http://thread.gmane.org/gmane.linux.kernel/1234225/focus=2410

If someone wants to chisel away at this (e.g., starting with icmp.h
and sysctl.h, then x86 or mips) following Sam's advice, I'll be happy.

Glad to see this doesn't seem to be stalled any more.

Jonathan