MFC r307800, r307801

r307800:

Sources from the "current" build tree and generated sources in the
object tree should be used instead of sources and headers from the
already installed source tree on the build host.

This was noticed while addressing issues in the upcoming amd update.

r307801:

Align whitespace.

r307801 is related to r307800 however it was a separate commit to
HEAD in order to maintain a separation between the functional change
and a correction of style.

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

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

Consistently set RPCGEN_CPP when running rpcgen, so the C preprocessor
set via ${CPP} is used, instead of always using hardcoded /usr/bin/cpp.

MFC after: 1 week

MFtbemd:

Prefer MACHNE_CPUARCH to MACHINE_ARCH in most contexts where you want
to test of all the CPUs of a given family conform.

The last big commit: let usr.sbin/ use WARNS=6 by default.

Folded WITH_HESIOD_SUPPORT into WITH_HESIOD.

Reimplementation of world/kernel build options. For details, see:

http://lists.freebsd.org/pipermail/freebsd-current/2006-March/061725.html

The src.conf(5) manpage is to follow in a few days.

Brought to you by: imp, jhb, kris, phk, ru (all bugs are mine)

Respect the YES_HESIOD build variable

Add knob NO_NIS (fka NO_YP_LIBC) and make world compileable when set.
If turned on no NIS support and related programs will be built.

Lost parts rediscovered by: Danny Braniss <danny at cs.huji.ac.il>
PR: bin/68303
No objections: des, gshapiro, nectar
Reviewed by: ru
Approved by: rwatson (mentor)
MFC after: 2 weeks

style.Makefile(5)

Removed mentions of TARGET_ARCH from non-cross places.

Try to determine the OS version and architecture for what is being built
vs. the building machine.

PR: 14040

Perform a major cleanup of the usr.sbin Makefiles.
These are not perfectly in agreement with each other style-wise, but they
are orders of orders of magnitude more consistent style-wise than before.

Properly fix the world breakage.

Unpollute the Makefile.inc's abuse of SRCS variable, and move
the generation of header files into include/ subdirecory.

Reviewed by: buildworld

$Id$ -> $FreeBSD$

Add the texinfo'ed docs to the build/install.

Fully use our own generated files for NFSv3.

Fix parallel makes falling over on xwhere

bmake framework for contrib_amd