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

MFC r260334:

Split the last gcc-specific flags off into CFLAGS.gcc. This also
removes the need to use -Qunused-arguments for clang throughout the
tree.

MFC r260369:

Apply band-aid for 32-bit compat libs failures after r260334: put back
-Qunused-arguments for clang for now, until I can figure out a way to
make it unneeded in all scenarios. Sorry about the breakage.

MFC r260095:

For sys/boot/i386 and sys/boot/pc98, separate flags to be passed
directly to the linker (LD_FLAGS) from flags passed indirectly, via the
compiler driver (LDFLAGS).

This is because several Makefiles under sys/boot/i386 and sys/boot/pc98
use ${LD} directly to link, and the normal LDFLAGS value should not be
used in these cases.

MFC r257532 (by adrian):

Fix this build for clang.

MFC r259730:

To avoid having to explicitly test COMPILER_TYPE for setting
clang-specific or gcc-specific flags, introduce the following new
variables for use in Makefiles:

CFLAGS.clang
CFLAGS.gcc
CXXFLAGS.clang
CXXFLAGS.gcc

In bsd.sys.mk, these get appended to the regular CFLAGS or CXXFLAGS for
the right compiler.

MFC r259913:

For libstand and sys/boot, split off gcc-only flags into CFLAGS.gcc.

MFC r259927:

Fix pc98 build, by also forcing COMPILER_TYPE in sys/boot/pc98/boot2's
Makefile.

Pointy hat to: dim

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

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

Put in a band-aid to get the pc98 bootstraps building, now clang is the
default compiler. This has two parts:
- Make sys/boot/pc98/boot2 always build with gcc for now, until we can
figure out a way to shrink it enough when building with clang.
- Since sys/boot/p98/cdboot uses .code16 directives, which are not yet
supported by clang's integrated assembler, use -no-integrated-as,
similar to sys/boot/i386/cdboot.

Reviewed by: nyan
MFC after: 1 week

MFi386: revision 220337

Build boot2 with -mregparm=3.

Remove superfluous -mno-(mmx|3dnow|sse|sse2|sse3) flags in Makefiles
under sys/boot/{i386,pc98}, since these are already added via
sys/boot/{i386,pc98}/Makefile.inc.

Submitted by: arundel

When building world with clang, for gnu/lib/libobjc, sys/boot/i386/boot2
and sys/boot/pc98/boot2, do not simply assign 'gcc' to CC, since compile
flags are sometimes passed via this variable, for example during the
build32 stage on amd64. This caused the 32-bit libobjc build on amd64
to fail.

Instead, only replace the first instance of clang (if any, including
optional path) with gcc, and leave the arguments alone.

Approved-by: rpaulo (mentor)

Always compile pc98 boot2 with gcc instead of clang, just as with i386
boot2. Unfortunately both still are too big when compiled with clang.

Reviewed by: nyan
Approved by: rpaulo (mentor)

Reimplement the boot2 for pc98 completely.
It's based on the newest i386's one and has the advantage of:

- ELF binary support.
- UFS2 filesystem support.
- Many FreeBSD slices support on a disk.

Tested by: SATOU Tomokazu ( tomo1770 _ maple _ ocn _ ne _ jp ),
WATANABE Kazuhiro ( CQG00620 _ nifty _ ne _ jp ) and
nyan

MFC after: 2 week

Happy New Year in Japan!!

Cleanups the boot2 for pc98. There is no functional change.
- Make setting machine type and getting geom conditional for future.
- Remove unused RAWBOOT and CDBOOT supports.
- Remove unneeded include.
- Fix warnings.

MFC after: 1 week

Fix a fallout from SSP commit, and make this compile again.
Bonus: including kern.mk just to pick kernel warning flags
was an extremely bad idea anyway, because it also picked
up CFLAGS (it probably wasn't the case at the time of CVS
rev. 1.1, I haven't checked). Remove duplicate CWARNFLAGS
from CFLAGS.

Remove ifdef PC98.

Fix buidling of boot blocks for pc98 with new links.

Submitted by: nyan@

NOSHARED -> NO_SHARED

Start the dreaded NOFOO -> NO_FOO conversion.

OK'ed by: core

MFi386: revision 1.56 (Add -fno-unit-at-a-time to CFLAGS).

MFi386: Factor out -nostdlib and use PROG.

MFi386: Removed -elf and duplicate -ffreestanding.

MFi386: Cleanups to sys/boot makefiles.

Fixed sys/boot/pc98/boot2/Makefile to use kern.mk and
get rid of bsd.kern.mk completely.

OK'ed by: bde

MFi386: Install the "boot" image which is boot1 + boot2.

Remove '-DUFS1_ONLY' from CFLAGS. It is not needed.

Move the definition of UFS1_ONLY into the Makefiles where it belongs.

Sponsored by: DARPA & NAI Labs.

Added some header files from -stable and fixed the boot[12] programs.

Drop support for COPY, -c has been the default mode of install(1)
for a long time now.

Approved by: bde

Cosmetic change (align with other boot blocks):

CONSPEED -> COMSPEED

Approved by: nyan

Fixed to build for GCC 3.1

-ffreestanding is the word.
(also resort some CFLAGS such that the more "important" value are first so
they are easier to see)

Add -D_KERNEL to CFLAGS for ntohl().

Update boot[12] program to compile ELF binary.

Submitted by: Nobuyuki Koganemaru <n-kogane@syd.odn.ne.jp> and
kawanobe@st.rim.or.jp (Kawanobe Koh)

Remove -mno-486 option and add -mpreferred-stack-boundary=2 option.

$Id$ -> $FreeBSD$

Optimize better for space.

Submitted by: Takahashi Yoshihiro <nyan@wyvern.cc.kogakuin.ac.jp>

PC98 version of new boot loader. Because boot2 has not yet ported,
files in boot2 directory are copies from legacy biosboot.

Submitted by: IMAI Takeshi <take-i@ceres.dti.ne.jp>