Introduce the KEEPKERNELS variable: if this is set either in mk.conf or
the environment, 'make cleandir' does not descend into kernel build
directories. Thus, kernel object files survive 'make build

Introduce the KEEPKERNELS variable: if this is set either in mk.conf or
the environment, 'make cleandir' does not descend into kernel build
directories. Thus, kernel object files survive 'make build' on slower
architectures.

WARNING:
If you set this variable, you run the risk of breaking 'make release':
Be sure to run 'make cleandir' from /sys/arch/$(machine)/compile before
doing 'make release'. This issue will be addressed shortly.

requested by kettenis;
ok deraadt

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Kernel builds now happen in compile/CONFIG/obj@ -> /usr/obj/... [or ./obj/,
if srctree is not rooted at /usr/src]. As a result, stock GENERIC & RAMDISK
kernels are commited to the tree, to ensure th

Kernel builds now happen in compile/CONFIG/obj@ -> /usr/obj/... [or ./obj/,
if srctree is not rooted at /usr/src]. As a result, stock GENERIC & RAMDISK
kernels are commited to the tree, to ensure the src tree can be "readonly"
during builds, with all writes occuring inside the obj space. config -b
options are handled by ../Makefile.inc. The canonical new way to configure
one of these kernels is:
% cd /sys/arch/amd64/compile/GENERIC.MP
% doas make obj
% make config
% make
% doas cp obj/bsd /bsd
The build infrastructure will use this new mechanism in a de-escalation
way using BUILDUSER.
Much help from natano and tb.

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fix arch/mach confusion in make tags. from frantisek holop

reflect reality, mark as NOOBJ
"sure" deraadt@

sync TDIRS with reality

"looks good" deraadt@

Push all potential (as in, all system MI not utilized by the bootblocks)
.h files into the ctags run as well to bring #define's and structs and
such into scope. Problem reported by thib

no need to specify the -t flag to ctags

Completely rewrite the tags file creation process. use config(8) against
a fat kernel (GERERIC or GENERIC.MP) into a temporary dir, then extract some
variables using make -V, and after some more sin

Completely rewrite the tags file creation process. use config(8) against
a fat kernel (GERERIC or GENERIC.MP) into a temporary dir, then extract some
variables using make -V, and after some more singing and dancing use this
full and (more) correct list of files with ctags. Don't read this code.
ok guenther

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fix tag building; Pierre Riteau plus my own tweaks

Incomplete bits for an OpenBSD/landisk port to the I/O DATA USL-5P appliances,
mickey@ has the other part.