remove GCC_NO_ADDR_OF_PACKED_MEMBER for several subdir builds
that are now handled by lfs_accessors.h internally.

add support for new GCC 9 warnings that may be too much to fix
right now. new address-of-packed-member and format-overflow
warnings have new GCC_NO_ADDR_OF_PACKED_MEMBER amd
GCC_NO_FORMAT_OVERFLOW variables to remove these warnings.

apply to a bunch of the tree. mostly, these are real bugs that
should be fixed, but in many cases, only by removing the 'packed'
attribute from some structure that doesn't really need it. (i
looked at many different ones, and while perhaps 60-80% were
already properly aligned, it wasn't clear to me that the uses
were always coming from sane data vs network alignment, so it
doesn't seem safe to remove packed without careful research for
each affect struct.) clang already warned (and was not erroring)
for many of these cases, but gcc picked up dozens more.

Use llabs(), not abs(), on the difference of daddr_t's.
Caught by clang, reported by joerg.

Turn off the clang-specific compiler flags that were making the report
nonfatal.

Make the abs() use check non-fatal for a bogus use in the LFS cleanerd.

Tidy up the LFS userland build hacks.
Don't use -I${NETBSDSRCDIR}/sys; don't include files other than the
exported LFS headers, which are lfs.h, lfs_inode.h, and (for now)
lfs_extern.h.

Cleanups and hacks to make lfs userland stuff build:
- lfs_cksum.c doesn't actually need ulfs_inode.h any more.
- neither does lfs_itimes.c.
- add hacks to fsck_lfs to make it compile.
- add hacks to newfs_lfs to make it compile.
- fix warning in ulfs_quota.c when quotas are fully disabled
(as I guess is happening with the rumpity version)

XXX: This commit adds -I${NETBSDSRCDIR}/sys to the Makefiles for
XXX: fsck_lfs, newfs_lfs, and lfs_cleanerd. This needs to be cleaned
XXX: up ASAP; but I consider this less problematic in the short term
XXX: than spewing ulfs_*.h into /usr/include.

branches: 1.15.6; 1.15.12;
Define syscalls of lfs userspace tools (cleaner, mainly) through
a struct called kernelops, which contains standard system calls
for the normal case and rump system calls for the rump case.

Make it possible to run the lfs cleaner in a library fashion (taking
the quick route with the implementation).

PR/40965: NAKAJIMA Yoshihiro: lfs_cleanerd isn't adapted to !MKDYNAMICROOT

Default to WARNS=4
Exceptions that need a lower level are:
getty ld.elf_so lfs_cleanerd makewhatis telnetd tftpd
hpropd ipropd-master ipropd-slave kadmind kpasswdd

branches: 1.12.12;
Make it build with src/sys from the vmlocking2 branch.

branches: 1.11.8;
Move lfs_cleanerd from /usr/libexec to /libexec. This is to allow putting
the root file system on a LFS volume.

Addresses PR bin/30407. No objections in tech-userlevel@.

A new version of the cleaner. In general, works about as well as the old
cleaner, but with more legible code.

Includes code for reading and writing to the raw disk device (so that an
unmounted fs could be cleaned), for the use of a single daemon to clean
multiple filesystems to save on resources, and for recording the old
contents of cleaned segments to offline storage for regression testing of
the LFS system as a whole; though these new features are not properly
tested at this point.

Use ${NETBSDSRCDIR}/some/path instead of ${.CURDIR}/../../some/path

First stab at file coalescing. When the cleaner detects that it might
be digging itself deeper into a hole, it forks off a subprocess
that locates files with too many discontinuities and rewrites them, if
there is enough room.

Optionally the user can manually coaleasce files by running with "-c".

The recent change to lfs_markv is required for the coalescer to do anything.

All of "digging itself deeper", "too many discontinuities", and "enough room"
need to be better defined.

Try to prevent running more than one active cleaner on a filesystem at a time.

Let lfs_cleanerd record its pid in /var/run like other daemons. Make
mount_lfs not start another cleaner when updating the mount, unless it is
being upgraded from read-only to read-write; when downgrading to read-only,
kill the cleaner using the recorded pids.

branches: 1.6.10;
use CPPFLAGS instead of CFLAGS

branches: 1.5.2;
merge lite-2 Makefiles (rcsids), and turn on WARNS for all of libexec.

WARNS?=1. RCS ids.

specify man pages the new way.

do not need -I/sys

branches: 1.1.1;
From 4.4-Lite, with local changes.