From: Mike Frysinger <vapier(a)gentoo.org>
Date: Wed, 16 Jan 2013 12:28:39 -0500
if you're not calling the kernel directly, why are you including
the kernel
headers ? what is the problem people are actually trying to address here (and
no, "i want to include both headers" is not the answer) ?
When GLIBC doesn't provide it's own definition of some networking
macros or interfaces that the kernel provides, people include the
kernel header.
This has been done for decades, wake up.