Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

strings: disable Casper support while building native-xtools

Reported by: Charlie Li
Tested by: Charlie Li

strings: capsicumize it

Reviewed by: cem
Discussed with: emaste
Differential Revision: https://reviews.freebsd.org/D18038

elftoolchain: Use ${SRCTOP} for the top of the FreeBSD tree

It's provided by sys.mk so there's no need to derive it from ${.CURDIR}.

Suggested by: ngie
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D5998

Replace ${CURDIR}/../.. with ${CURDIR:H:H} in elftoolchain

This produces a nicer path in debug info and build logs.

MFC after: 1 week
Sponsored by: The FreeBSD Foundation

Build infrastructure for elftoolchain tools

Set WITH_ELFTOOLCHAIN_TOOLS in src.conf to use the elftoolchain version
of the following tools:

* addr2line
* elfcopy (strip / mcs)
* nm
* size
* strings

Reviewed by: bapt (earlier version)
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D1224

Finish the deorbital burn of the i386-only a.out toolchain.

Remove to-be-default WARNS?=2

Warns cleanups.

MAN[1-9] -> MAN.

Install the legacy man file in section 1aout.

ELF preparation step 1:

Move our old a.out utils to /usr/libexec/aout.
Enable binutils and put the utils in /usr/libexec/elf
Enable objformat, a little helper program that calls the right
utils based on /etc/objformat and $OBJFORMAT.

This will enable the ELF generating tools.
Remember that this is only step one, the system is still compiled
and run in a.out format ONLY.

Problem left to solve: The BSD manpages wins over the GNU equivalents
as the are installed last. We need to distinguish between the manpages
somehow...

BSD 4.4 Lite Usr.bin Sources