libc: Move tzset.3 to stdtime

This really belongs in stddime, since it documents interfaces
implemented in stdtime.

Suggested by: brooks
Sponsored by: Netflix

Remove $FreeBSD$: one-line sh pattern

Remove /^\s*#[#!]?\s*\$FreeBSD\$.*$\n/

tzcode: Move configuration into separate header.

MFC after: 1 week
Sponsored by: Klara, Inc.

Bring our tzcode up to date.

* Replay 2010[acflm] which had been merged but not recorded.
* Merge 2010n.
* Reorganize (unsplit) the code to match the upstream layout.
* Merge 2022[cdefg].

MFC after

Bring our tzcode up to date.

* Replay 2010[acflm] which had been merged but not recorded.
* Merge 2010n.
* Reorganize (unsplit) the code to match the upstream layout.
* Merge 2022[cdefg].

MFC after: 1 week
Sponsored by: Klara, Inc.

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tzcode: Implement timezone change detection

Implement optional timezone change detection for local time libc
functions. This is disabled by default; set WITH_DETECT_TZ_CHANGES
to build it.

Reviewe

tzcode: Implement timezone change detection

Implement optional timezone change detection for local time libc
functions. This is disabled by default; set WITH_DETECT_TZ_CHANGES
to build it.

Reviewed By: imp
Sponsored by: NetApp, Inc.
Sponsored by: Klara, Inc.
X-NetApp-PR: #47
Differential Revision: https://reviews.freebsd.org/D30183

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MFhead@r313243

Merge ^/head r312309 through r312623.

Replace dot-dot relative pathing with SRCTOP-relative paths where possible

This reduces build output, need for recalculating paths, and makes it clearer
which paths are relative to what areas in the

Replace dot-dot relative pathing with SRCTOP-relative paths where possible

This reduces build output, need for recalculating paths, and makes it clearer
which paths are relative to what areas in the source tree. The change in
performance over a locally mounted UFS filesystem was negligible in my testing,
but this may more positively impact other filesystems like NFS.

LIBC_SRCTOP was left alone so Juniper (and other users) can continue to
manipulate lib/libc/Makefile (and other Makefile.inc's under lib/libc) as
include Makefiles with custom options.

Discussed with: marcel, sjg
MFC after: 1 week
Reviewed by: emaste
Sponsored by: Dell EMC Isilon
Differential Revision: https://reviews.freebsd.org/D9207

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libc: remove reference to nonexistent lib/locale directory

As far as I can tell this was introduced in r72406 and updated in several
subsequent revisions, but the lib/locale directory it referenced

libc: remove reference to nonexistent lib/locale directory

As far as I can tell this was introduced in r72406 and updated in several
subsequent revisions, but the lib/locale directory it referenced never
existed.

Reviewed by: ngie
Sponsored by: The FreeBSD Foundation
Differential Revision: https://reviews.freebsd.org/D9252

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MFH

Sponsored by: The FreeBSD Foundation

Implement (ACFLAGS|CFLAGS|CXXFLAGS).SRC globally.

Sponsored by: EMC / Isilon Storage Division

MFC @ r266724

An SVM update will follow this.

Merge head

IFC @264767

Merge head up to r263906.

Replace use of ${.CURDIR} by ${LIBC_SRCTOP} and define ${LIBC_SRCTOP}
if not already defined. This allows building libc from outside of
lib/libc using a reach-over makefile.

A typical use-case is to

Replace use of ${.CURDIR} by ${LIBC_SRCTOP} and define ${LIBC_SRCTOP}
if not already defined. This allows building libc from outside of
lib/libc using a reach-over makefile.

A typical use-case is to build a standard ILP32 version and a COMPAT32
version in a single iteration by building the COMPAT32 version using a
reach-over makefile.

Obtained from: Juniper Networks, Inc.

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IFC @253398

Merge fresh head.

sync from head

Compile contrib/tzcode/stdtime/localtime.c with -fwrapv, since it relies
on signed integer overflow wrapping. Otherwise mktime(3) and timegm(3)
can hang, in case the timestamp passed in struct tm is

Compile contrib/tzcode/stdtime/localtime.c with -fwrapv, since it relies
on signed integer overflow wrapping. Otherwise mktime(3) and timegm(3)
can hang, in case the timestamp passed in struct tm is not representable
in a time_t. Specifically, any timestamp after 2038-01-19 03:14:07, in
combination with a 32-bit time_t.

Note that it would be better to change the code to not rely on undefined
behaviour, but it is contributed code, and it is not entirely trivial to
fix the issue properly.

MFC after: 3 days

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Sync from head

Merge head r236710 through r238467.

IFC @238412.

IFC @ r238370

Add more locale-specific functions to the relevant man pages and
Makefiles:
- libc/stdtime/strftime.3
- libc/stdtime/strptime.3
- libc/stdlib/strfmon.3

Reviewed by: theraven
Approved by: gabor (ment

Add more locale-specific functions to the relevant man pages and
Makefiles:
- libc/stdtime/strftime.3
- libc/stdtime/strptime.3
- libc/stdlib/strfmon.3

Reviewed by: theraven
Approved by: gabor (mentor)

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