Re: [HEADS UP] ar(1) front-end committed. (notes for cross compile)

Hi,

Here's the promised patch.  What it does:

- Switch again to using BSD ar(1) by default, but provide a knob
  to use GNU ar(1) as the system ar(1).  (Option WITH_BSDAR is
  replaced with option WITH_GNUAR.)

- Install BSD ar(1) as bsdar(1) with the necessary links:
  bsdranlib(1), ar(1), and ranlib(1) (the latter two unless we
  build WITH_GNUAR).

- ar.1 moved to bsdar.1 along with some bugfixing.
  
- Don't proceed with bsdar(1) if option WITHOUT_TOOLCHAIN is set.

- Handle upgrades nicely: use GNU ar(1) during the build on older
  systems, and use BSD ar(1) on newer systems.  For now, always
  bootstrap BSD ar(1) on newer systems during the build (in case
  some bugs pop up), but after some period of testing, we can stop
  unconditionally bootstrapping it.

Please review.


Cheers,
-- 
Ruslan Ermilov
ru_at_FreeBSD.org
FreeBSD committer