Copy stable/10@r272459 to releng/10.1 as part of
the 10.1-RELEASE process.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Copy head (r256279) to stable/10 as part of the 10.0-RELEASE cycle.

Approved by: re (implicit)
Sponsored by: The FreeBSD Foundation

Replace deprecated (or remove obsolete) libarchive 2.8 functions
with libarchive 3.0 counterparts

Don't try to free() an address returned by mmap(). This appears to be
triggered by the same .o being included twice on the command line.

Found by: Nima Misaghian at Sandvine
Reviewed by: kientzle, kaiw
Approved by: re
MFC after: 1 week

Correct typos in comments, no functional changes.

Found by: codespell
Reviewed by: kaiw
MFC after: 1 week

Add -D (deterministic) option to ar.
When set, it forces all timestamps and owners to zero and
modes to 0644. Useful for producing libraries that are
bitwise identical across multiple build runs.

Submitted by: Erik Cederstrand
Reviewed by: Kai Wang

Removed ar(1)'s support for compressed archives. This change removes
ar(1)'s dependencies on compressor libraries -lz, -lbz2 and -llzma and
fixes building HEAD on some versions of FreeBSD[78]. Option -j and -z
is now accepted but ignored.

Compressed ar(1) archives are not useful without a ld(1) that can read
them. Also, the current ar(1) compression scheme prevents random
access of archive members and needs to be redesigned anyway.

Submitted by: kientzle (original patch)
Reviewed by: delphij
Discussed on: -current mailing list

Add support for option "-M", which is used to operate ar(1) in a
script mode like the MRI(Microtec Research Inc.) "librarian" program.

Originally this option is provided by Binutils ar(1) to ease the
transition for developers who are used to writing "librarian" scripts.

We added this option to BSD ar(1) because:

1. Further improve the compatibility with Binutils ar(1).
2. There are still a few software using this -M option. (at least one
in our ports collection)

Suggested by: rink & erwin

GNU ar did NOT implment option -q as a synonym of -r as the manual
page stated, thus BSD ar(1) option -q, which was implemented based on
the GNU ar manual page, turns out to be incompatible with GNU ar -q.

This change will make BSD ar(1) -q a *REAL* GNU ar -q:

1. It will update symbol table. (same as unfixed version)
2. It will NOT compare new members spcified in the command line args
with existing members, instead, append them directly.

Reported by: Johannes 5 Joemann <joemann@beefree.free.de>
Reported by: Timothy Bourke <timbob@bigpond.com>
Tested by: Johannes 5 Joemann <joemann@beefree.free.de>
Reviewed by: jkoshy
Approved by: jkoshy (mentor)

- Do not malloc buffer for 0-size member when reading from archive.
- Fix a malloc buffer overrun: Use a while loop to check whether
the string buffer is big enough after resizing, since doubling
once might not be enough when a very long member name or symbol
name is provided.
- Fix typo.

Reported by: Michael Plass <mfp49_freebsd@plass-family.net>
Tested by: Michael Plass <mfp49_freebsd@plass-family.net>
Reviewed by: jkoshy
Approved by: jkoshy

style(9) whitespace fix: A space is mandated after keyword 'return'.

Submitted by: jkoshy
Approved by: jkoshy (mentor)

Handle properly when insert zero size objects into the archive:
Do not mmap 0-size objects and do not try to extract symbol from
0-size objects, but do treat 0-size objects as qualified objects and
accept them as an archive member. (A member with only the header part)

Note that GNU binutils ar on FreeBSD ignores 0-size objects, but on
Linux it accepts them. [1] But, since this is a rare usage, we can
safely ignore the compatibility issue.

Reported by: Michael Plass <mfp49_freebsd [AT] plass-family [DOT] net>
Pointed out by: Michael Plass <mfp49_freebsd [AT] plass-family [DOT] net> [1]
Reviewed by: Michael Plass <mfp49_freebsd [AT] plass-family [DOT] net>
Reviewed by: jkoshy
Approved by: jkoshy (mentor)

Import ar(1) front-end. (aka 'BSD' ar)

Reviewed by: jkoshy
Approved by: jkoshy (mentor)
Tested by: erwin (ports build test on pointyhat)
Sponsored by: Google Summer of Code 2007
Reviewed by (earlier version): Jaakko Heinonen <jh[AT]saunalahti.fi>
Tested by (earlier version): Steve Kargl <sgk[AT]troutmask.apl.washington.edu>
Tested by (earlier version): Martin Voros <martin_voros[AT]yahoo.com>
Tested by (earlier version): swell.k[AT]gmail.com
Tested by (earlier version): joel
Tested by (earlier version): Alexey Shuvaev <shuvaev[AT]physik.uni-wuerzburg.de>
Tested by (earlier version): Arjan van Leeuwen <avleeuwen[AT]gmail.com>

Thanks to gabor@ for building ports for it.
Thanks to erwin@ and kris@ for scheduling the ports build test on pointyhat.
And thanks to many others for their feedback.