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."

Only exclude gcc-8 warnings if the gcc we're using is gcc>=8

don't warn for strncpy wtmp fields, they are not NUL terminated.

branches: 1.8.60;
use LIBDPLIBS+= not =.

don't set LIBDPLIBS in libpam/modules/Makefile - it is not necessary
and it interferes with the compat lib build. don't use LIB_ROOT_DIR.

- Fix the quiet option; use login_cap to determine if we should print or not.
- Add nested user handling, including a no_nested option to control it.

Re-write to use both utmp and utmpx properly.

Use LIBDPLIBS to provide the list of libraries for the modules to depend
upon, because:
* it's MUCH quicker; no need to calculate the OBJDIRS of every library
we might require in every subdir.
(make obj drops from 21s to 3s on my system.)
* it's more robust when building to a fresh DESTDIR.

Link with libraries from the source build directory.

- NetBSD build glue
- Warning fixes
- RCSID's

branches: 1.1.1;
Initial revision

Document the no_nested option.

Merge PAM20050226.

Minor wording consistency nit.

Sort SEE ALSO, fix an xref, and s/FreeBSD/.Fx/.

Re-write to use both utmp and utmpx properly.

- NetBSD build glue
- Warning fixes
- RCSID's

branches: 1.1.1;
Initial revision

Annotate logit to provide transitive format string checks.

branches: 1.14.6;
avoid using %m in format.

branches: 1.13.8;
sign-compare fixes

init the syslog data.

use the re-entrant syslog functions so that we don't depend on the syslog
settings of the calling program.

Fix Coverity run 5, issue 2022 -- memory leak.
Approved by christos@.

PR/32870: Johan Veenhuizen: login(1) does not obey .hushlogin

check for pwd != in getpw*_r functions.

Use getpwnam_r().

branches: 1.6.2;
PR/29566: Izumi Tsutsui: login(1) shows wrong last-login-from host
Caused by improper initialization of struct lastlogx. Code has been
completely restructured, and we also now use pam_prompt() instead of
printf().
cvs: ----------------------------------------------------------------------

- Fix the quiet option; use login_cap to determine if we should print or not.
- Add nested user handling, including a no_nested option to control it.

Introduce a few more temporary variables, in order to avoid an ugly
double cast in the pam_get_item() invocations. The double cast
triggered a "discards qualifier" warning/error from gcc 2.95.3, while
trying to fix that by adding "cost" to the "void *" cast produced
a similar warning from gcc 3.3. This now compiles without warning
with both compilers.

Approved by christos

Re-write to use both utmp and utmpx properly.

- NetBSD build glue
- Warning fixes
- RCSID's

branches: 1.1.1;
Initial revision