Catch up with all the lint warnings since exit on warning was disabled.
Disable 'missing header declaration' and 'nested extern' warnings for now.

PR/57250: Martin Husemann: dtoa mishandles infinite doubles on 32bit big
endian machines. When long double support was added, the old code was kept
for the regular double code. This code was never us

PR/57250: Martin Husemann: dtoa mishandles infinite doubles on 32bit big
endian machines. When long double support was added, the old code was kept
for the regular double code. This code was never used because WIDE_DOUBLE
was always defined in the Makefile. Remove that old code, and conditionalize
the WIDE_DOUBLE code based on if long doubles are different than doubles on
the specific platform.

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lib: remove CONSTCOND comment

Since 2021-01-31, lint doesn't need it anymore for the common pattern of
'do ... while (0)'.

reallocarr returns errno. preserve it.

vfwprintf(3): use reallocarr

A more correct fix for PR standards/52282.

Do not use thousands grouping when none is specified by the locale.
Fixes PR standards/52282.

vfwprintf: fix error propagation
PR/47660 (Julio Merino)

Make compile with -DNO_FLOATING_POINT

Provide explicit LC_C_LOCALE accessor and drop the various NULL checks.
Provide LC_GLOBAL_LOCALE in a way that works with all locale functions.
Merge constant data used by the initial global locale a

Provide explicit LC_C_LOCALE accessor and drop the various NULL checks.
Provide LC_GLOBAL_LOCALE in a way that works with all locale functions.
Merge constant data used by the initial global locale and the C locale.
Drop function call layer for _current_locale() and directly return the
locale reference, not a pointer to it. Use protected access for global
variables, so that libc references can avoid the GOT overhead.

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Add explicit locale versions for the printf family. Replace asprintf,
snprintf and sprintf with simple wrappers around the corresponding
va_list functions to reduce code duplication.

- widen the internal read and write calls to match the syscalls
- add funopen2() which provides access to flush() and the wider calls.
- make use of the new flush call in fmemopen()

unsigned char portability casts

- ansify, knf.
- no functional changes

PR/45989: Martin Husemann: lint invocation does include -w only on i386

- turn lint -w for all the platforms after fixing the lint warnings.
- add _DIAGASSERTS() for casts that would assign values t

PR/45989: Martin Husemann: lint invocation does include -w only on i386

- turn lint -w for all the platforms after fixing the lint warnings.
- add _DIAGASSERTS() for casts that would assign values to types that
would not fit.
- change types, add casts
- change into ansii prototypes
- turn on _DIAGNOSTIC for libc (during current, to be eliminated for release
builds)

approved by core@

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remove unused variable

Fix: CVE-2012-0864 fprintf() positional argument abuse.
Described in: http://www.phrack.org/issues.html?issue=67&id=9#article
Reported by Stefan Cornelius / Red Hat Security Response Team

- convert

Fix: CVE-2012-0864 fprintf() positional argument abuse.
Described in: http://www.phrack.org/issues.html?issue=67&id=9#article
Reported by Stefan Cornelius / Red Hat Security Response Team

- convert internal positional arguments bookkeeping from int to size_t
- provide overflow protection in positional argument spec
- convert loops to memset
- fix memory leaks
- limit positional argument stack offset to the number of arguments required
by the printf to avoid coredump from va_arg() exhaustion.

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fix the rest of libc mi gcc-4.5 hacks. portmasters should fix the md ones.

Observe the following spelling:
- wide character (noun)
- wide-character (adjective)

Inspired by jmc@OpenBSD.

PR/44113: Nicolas Joly: printf(3) should ignore zero padding for nan/inf

initialize fake FILE, not fp.

undo unrelated diff.

fix coredump vfwprintf(stderr) reported in current-user@
rework rev1.9, _FILEEXT_SETUP() doesn't care wcio_data. so initialize it.

revert some of dsl's changes to make things build on i386; he can undo what
he wants when he comes back.

Remove a load of pointless casts - one that even lint doesn't bleat about.