Add linker script to assis lld with building something usable that doesn't
have a PT_GNU_STACK segment and doesn't pad the bootblocks to a full page.

ok naddy@, help from guenther@

remove the remaining references to .depend files since nothing creates them
any longer; ok espie@ deraadt@

Allow building the bootstrap with clang:
* skip the integrated assembler for assym.h
* use as(1) to build biosboot.S and the various versions of srt0.S
ok deraadt@

Prep for relro: make sure it's off for any non-PIE stand/ program

ok millert@ kettenis@

fix even more trailing tabs

fix bogus dependencies, and allow mkdep to run
checked on amd64 by rpe@
okay jsing@

Generate assym.h where we need it, instead of reaching around into other
object directories.

Discussed with deraadt@

Clean up/standardise makefiles for amd64/stand.

Reduce the diff between amd64/stand and i386/stand, requested by deraadt@.
These create essentially the same bootblocks, so the build system should not be
diverging too much, or at least easily diffable.
There is still a lot of work to be done here, but this is the low-hanging fruit.

ok jsing@

Get rid of all NOPIE and NOPIE_FLAGS in amd64/stand and use -fno-pie and -nopie
directly instead. This will be the approach taken by every other arch too
in the near future. It is easier than relying on bsd.own.mk to set these
correctly.

discussed with and ok deraadt@

Add NOPIE= bits for sys/arch/*/stand to ensure that bootblocks will always be
built with -fno-pie. This gets the hairiest part of PIE out of the way ...

ok deraadt@

size works now on cross-size .o files

Work arounda behaviour change in binutils-2.14, now -m<...> -nostdlib
removes /usr/libdata from the script search path. add it back with a -L

branches: 1.1.2;
das boot; das cloned das from das i386

remove the remaining references to .depend files since nothing creates them
any longer; ok espie@ deraadt@

Allow building the bootstrap with clang:
* skip the integrated assembler for assym.h
* use as(1) to build biosboot.S and the various versions of srt0.S
ok deraadt@

Prep for relro: make sure it's off for any non-PIE stand/ program

ok millert@ kettenis@

fix even more trailing tabs

fix bogus dependencies, and allow mkdep to run
checked on amd64 by rpe@
okay jsing@

Generate assym.h where we need it, instead of reaching around into other
object directories.

Discussed with deraadt@

Clean up/standardise makefiles for amd64/stand.

Reduce the diff between amd64/stand and i386/stand, requested by deraadt@.
These create essentially the same bootblocks, so the build system should not be
diverging too much, or at least easily diffable.
There is still a lot of work to be done here, but this is the low-hanging fruit.

ok jsing@

Get rid of all NOPIE and NOPIE_FLAGS in amd64/stand and use -fno-pie and -nopie
directly instead. This will be the approach taken by every other arch too
in the near future. It is easier than relying on bsd.own.mk to set these
correctly.

discussed with and ok deraadt@

Add NOPIE= bits for sys/arch/*/stand to ensure that bootblocks will always be
built with -fno-pie. This gets the hairiest part of PIE out of the way ...

ok deraadt@

size works now on cross-size .o files

Work arounda behaviour change in binutils-2.14, now -m<...> -nostdlib
removes /usr/libdata from the script search path. add it back with a -L

branches: 1.1.2;
das boot; das cloned das from das i386