centralize vers.c building for standalone programs.

branches: 1.31.2;
Avoid the PIE

branches: 1.30.2;
Always build for mips3. Use -Os instead -O2 for smallest code size.
text goes from 74608 to 63020

branches: 1.29.4;
Use ${TOOL_GZIP_N} instead of ${TOOL_GZIP} -n, and similarly
use ${TOOL_GZIP_N} -9 instead of ${TOOL_GZIP} -9n, etc.

This will pass -nT instead of just -n if the gzip program is
actually pigz.

branches: 1.28.2;
Pass the -n flag to gzip invocations.

This prevents it from embedding a timestamp in the output. We pass
"-n" unconditionally, not conditional on MKREPRO, because many other
invocations of gzip already passed the -n flag unconditionally.

eliminate use of bsd.sys.mk from Makefiles

Add empty LIBCRTI= as LIBCRT0 to build sa programs without installed DESTDIR.

XXX: probabry we should have bsd.saprog.mk or something.

branches: 1.25.2; 1.25.12; 1.25.16;
don't set MACHINE_ARCH. the CPUFLAGS/etc. is enough, and otherwise this
doesn't work with an isolated $TOOLDIR from the mipse[lb] toolchain.

Use TOOL_GZIP

Merge forward from matt-nb5-mips64.
(XXX generic kernels on raq2 die after interrupts are enabled but gxemul
works fine).

Drop bootprog_maker (formerly enabled by -M) and bootprog_date (formerly
disabled by -D) from the output of newvers_stand.sh. Change -D to the
inverted logic, so that it adds the date to bootprog_rev in ().

Change all platforms accordingly. -D is added if MKREPRO is not yes and
wasn't present before. Platforms that didn't use -D don't depend on
MKREPRO now either.

branches: 1.21.2; 1.21.4;
Introduce .WAIT into the cleandir rule for blasting the libsa/libkern/etc.
trees, because it can race with the libsa/libkern/etc. makefiles' own
cleandir rules. I think I've found all of the uses of the offending idiom...
Closes PR 43360.

branches: 1.20.2; 1.20.4;
Use -DLIBSA_PRINTF_LONGLONG_SUPPORT -DLIBSA_PRINTF_WIDTH_SUPPORT
in debug printf()s.

Use <bsd.klinks.mk> for MD include dir symlinks.

branches: 1.18.6; 1.18.12;
Print boot banner and a loading kernel name onto LCD,
for users who don't have serial console. Bump version.

branches: 1.17.2; 1.17.4; 1.17.6;
Use macro defined in <machine/cpu.h> for cobalt_id and device addresses etc.
since <machine/leds.h> has been removed.
Also remove redundant address definitions in Makefile and local headers.
Pointed out by dieter roelants.

Add support for optional Z85C30 serial console on Cobalt Qube 2700.
Bump version.

WARNSfy

Split out a PCI configuration space read function into a separate file
so that we could use it in other sources.

- print cobalt model names in boot banner
- bump version.

branches: 1.12.12; 1.12.16;
Add support for netboot via tlp0 with standalone tlp(4) driver
taken from arch/sandpoint/stand/netboot.
There are still some kludge but it just works on RaQ and RaQ2.

branches: 1.11.6; 1.11.12; 1.11.22; 1.11.30; 1.11.32; 1.11.36;
Link libkern last. It contains functions normally found in libgcc, so
other libraries might have references to them.

Makes this compile with gcc4 (that emits calls to __ash[rl]di3 in libsa).

branches: 1.10.4; 1.10.8; 1.10.18;
merge ktrace-lwp.

branches: 1.9.10;
Don't specify the object format to pick the right endianness - the
linker already knows if it is big- or little-endian.

Ignore errors on some rm -rf's for platforms that aren't quite
POSIX compliant
and return errors on r/o source (FreeBSD) for -rf. Fixes PR#25022

Add a prompt to specify a kernel filename to be loaded on bootloader.

branches: 1.6.2;
Load the boot program at 0x80F00000 to give the boxes with just 16Mb of
RAM a chance to boot. Discussed with soren@, tested on customer's board.

NB: While acceptable as a temporary workaround since most (all?) Cobalt
hardware comes with no less than 16Megs on board, changing a kernel load
address or making a boot loader relocatable could be a better solution.

Pass some info from the boot loader to the kernel:

- Kernel image name
- Symbol table
- A flag indicating console presence (could be clobbered if not passed)

Add _rtt() entry to the boot loader code.

Include <bsd.own.mk> at the top so that machine-links are also created
on "make depend". Tested on my RaQ2, and fixes port-cobalt/23711.
While here, two more cosmetics:
- remove redundant definitions
- use NOMAN rather than setting MAN empty

Use ${HOST_SH} instead of `sh'.

If necessary, pull in <bsd.sys.mk> to get the definition of HOST_SH;
Makefiles that pull in one of (most of) <bsd.*.mk> will get this anyway.

Define LIB{CRT0,C,CRTBEGIN,CRTEND} as nothing, we don't need to link
against them.

branches: 1.1.2;
Initial commit of a 1-stage boot loader for NetBSD/cobalt. Only booting off
the hard drive is supported at the moment.