bsd.own.mk: rename GCC_NO_* to CC_WNO_*

Rename compiler-warning-disable variables from
GCC_NO_warning
to
CC_WNO_warning
where warning is the full warning name as used by the compiler.

GCC_NO_IMPLICIT_FALLTHRU is CC_WNO_IMPLICIT_FALLTHROUGH

Using the convention CC_compilerflag, where compilerflag
is based on the full compiler flag name.

introduce some common variables for use in GCC warning disables:

GCC_NO_FORMAT_TRUNCATION -Wno-format-truncation (GCC 7/8)
GCC_NO_STRINGOP_TRUNCATION -Wno-stringop-truncation (GCC 8)
GCC_NO_STRINGOP_OVERFLOW -Wno-stringop-overflow (GCC 8)
GCC_NO_CAST_FUNCTION_TYPE -Wno-cast-function-type (GCC 8)

use these to turn off warnings for most GCC-8 complaints. many
of these are false positives, most of the real bugs are already
commited, or are yet to come.


we plan to introduce versions of (some?) of these that use the
"-Wno-error=" form, which still displays the warnings but does
not make it an error, and all of the above will be re-considered
as either being "fix me" (warning still displayed) or "warning
is wrong."

branches: 1.39.28;
Let init be built easily with the CHROOT capability enabled.

This allows the ramdisk used in the incoming support for full-disk encryption to contain crunched binaries (much like sysinst) while booting a regular system (unlike sysinst).

branches: 1.38.6; 1.38.12;
Enable WARNS=4 by default except for:
dump dump_lfs fsck_ffs fsck_lfs fsdb mount_smbfs
newfs_ext2fs newfs_lfs resize_lfs setkey

branches: 1.37.12; 1.37.22;
warns=4

Add support for running multi-user in a chroot() environment.

How it works:

- after successful execution of /etc/rc, check the value of "init.root"
sysctl node, if it's different than "/", chroot() into its value and run
/etc/rc inside the chroot(),

- in single-user, return back to the original / file system.

Allows running with / file system on e.g., cgd(4), vnd(4) or ccd(4) volumes.

Idea first discussed with Matt Thomas, implemented by Jachym Holecek <freza
(at) liberouter.org> with some nitpicks by me. Successfully used by me for
almost a year with / on a cgd(4) volume (for more information about the setup
check ftp://ftp.NetBSD.org/pub/NetBSD/misc/salo/init-chroot/ ).

Revert previous revert; we don't need RESCUEDIR handling here now
<bsd.prog.mk> has it.

Revert previous; init(8) still needs special case handling for RESCUEDIR
otherwise the path to mount_mfs(8) and the standard $PATH will be wrong...

Remove RESCUEDIR hack; it will be done centrally.

If RESCUEDIR is defined, use that as an alternate path to sh and mount_mfs,
and prepend RESCUEDIR to the default PATH.
(This replaces my _PATH_ALTSHELL mods from rev 1.52 of init.c)

if RESCUEDIR is defined, use ${RESCUEDIR}/sh as _PATH_ALTSHELL

now that we have working rescue tools, there's no need to force
LDSTATIC=-static for init(8) on people who want LDSTATIC=""

fix typos that prevented us from cleaning utmpx. Noted by wiz

add utmpx/wtmpx processing support.

.ifdef SMALLPROG, compile without ALTSHELL and SECURE support

Rename MSDOSFS_ROOT to MFS_DEV_IF_NO_CONSOLE, and rework:
- Always attempt mfs dev if missing /dev/console
- Save and run both MAKEDEV and MAKEDEV.local
- After creating the mfs dev, mknod() and freopen() /dev/console.
- If MAKEDEV is missing do not fail out early, but still create the mfs,
/dev/console.
- If we hit any errors fail out to single user.
This change _only_ affects systems booting without /dev/console.

* Add user-controlled mk.conf variables
- SHLIBDIR Location to install shared libraries if ${USE_SHLIBDIR}
is "yes". Defaults to "/usr/lib".

- USE_SHLIBDIR If "yes", install shared libraries in ${SHLIBDIR}
instead of ${LIBDIR}. Defaults to "no".
Sets ${_LIBSODIR} to the appropriate value.
This may be set by individual Makefiles as well.

- SHLINKDIR Location of shared linker. Defaults to "/usr/libexec".
If != "/usr/libexec", change the dynamic-linker
encoded in shared programs

* Set USE_SHLIBDIR for libraries used by /bin and /sbin:
libc libcrypt libcrypto libedit libipsec libkvm libm libmi387
libtermcap libutil libz

* If ${_LIBSODIR} != ${LIBDIR}, add symlinks from ${LIBDIR}/${LIB}.so*
to ${_LIBSODIR}/${LIB}.so* for compatibility.

* Always install /sbin/init statically (for now)


The net effect of these changes depends on how the variables are set:

1.) If nothing is set or changed, there is no change from the
current behaviour:
- Static /bin, /sbin, and bits of /usr/*
- Dynamic rest
- Shared linker is /usr/libexec/ld*so

2.) If the following make variables are set:
LDSTATIC=
SHLINKDIR=/lib
SHLIBDIR=/lib
Then the behaviour becomes:
- Dynamic tools
- .so libraries used by /bin and /sbin are installed to /lib,
with symlinks from /usr/lib/lib*so to -> /lib/lib*so
where appropriate
- Shared linker is /lib/ld*so

3.) As per 2.), but add the following variable:
USE_SHLIBDIR=yes
This forces all .so's to be instaleld in /lib (with compat
symlinks), not just those tagged by their Makefiles to be.
Again, compat symlinks are installed

Remove INSTALLFLAGS=-fschg, as per change to usr.bin/ssh/ssh/Makefile.

branches: 1.23.4;
The mode 0544 workaround has not been necessary since the first BSDi import.

Make these executables world-readable.

CFLAGS->CPPFLAGS

define WARNS?=1 for all of sbin/*

Support root on msdos filesystems by creating an mfs on /dev and running
MAKEDEV all to create the devices. Idea by Chris Demetriou.

add WARN=1

rename DEBUGSHELL to ALTSHELL

convert to new RCS Id conventions; reduce my headache

specify man pages the new way.

Fix up RCS ids.

Update to 4.4-lite (basically some copyright changes) + local changes.

always use libcrypt

merge in changes from netbsd-0-9-ALPHA2

Add RCS identifiers.

branches: 1.9.2;
get rid of the bogus changes i made to init. note that /etc/ttys
*must* have an entry for "console", though it should be "off",
prolly.

a couple of local mods; always ask for shell in single user, use -lcrypt,
use root's shell rather that /bin/sh when going to single-user, etc.

incorporate bsdi's version of init; this is their version, w/no local changes
other than adding Id strings as appropriate

add preliminary support for devfs (e.g. MOUNT_DEVFS #define, etc.)

changed to use new libcrypt scheme.

added secure init patch

changed "Id" to "Header" for rcsids

added rcs ids to all files

branches: 1.1.1;
Initial revision