git: bc42155199b5 - main - Bring our tzcode up to date.
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Date: Tue, 10 Jan 2023 15:16:10 UTC
The branch main has been updated by des:
URL: https://cgit.FreeBSD.org/src/commit/?id=bc42155199b5b0b479311e05b07aee7f6f9c5172
commit bc42155199b5b0b479311e05b07aee7f6f9c5172
Merge: 016e46fd869e 85639444f44f
Author: Dag-Erling Smørgrav <des@FreeBSD.org>
AuthorDate: 2023-01-10 15:14:27 +0000
Commit: Dag-Erling Smørgrav <des@FreeBSD.org>
CommitDate: 2023-01-10 15:14:27 +0000
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.
contrib/tzcode/CONTRIBUTING | 97 +
contrib/tzcode/LICENSE | 5 +
contrib/tzcode/Makefile | 1250 ++++++
contrib/tzcode/NEWS | 5902 ++++++++++++++++++++++++++
contrib/tzcode/README | 52 +
contrib/tzcode/SECURITY | 15 +
contrib/tzcode/{stdtime => }/asctime.c | 71 +-
contrib/tzcode/calendars | 173 +
contrib/tzcode/date.1 | 167 +
contrib/tzcode/date.c | 216 +
contrib/tzcode/difftime.c | 62 +
contrib/tzcode/localtime.c | 2669 ++++++++++++
contrib/tzcode/newctime.3 | 344 ++
contrib/tzcode/newstrftime.3 | 290 ++
contrib/tzcode/newtzset.3 | 350 ++
contrib/tzcode/private.h | 957 +++++
contrib/tzcode/stdtime/difftime.c | 67 -
contrib/tzcode/stdtime/localtime.c | 2317 ----------
contrib/tzcode/stdtime/private.h | 318 --
contrib/tzcode/stdtime/tzfile.5 | 152 -
contrib/tzcode/stdtime/tzfile.h | 184 -
contrib/tzcode/strftime.c | 657 +++
contrib/tzcode/theory.html | 1479 +++++++
contrib/tzcode/{stdtime => }/time2posix.3 | 74 +-
contrib/tzcode/tz-art.html | 636 +++
contrib/tzcode/tz-how-to.html | 719 ++++
contrib/tzcode/tz-link.html | 1175 +++++
contrib/tzcode/tzfile.5 | 492 +++
contrib/tzcode/tzfile.h | 125 +
contrib/tzcode/tzselect.8 | 125 +
contrib/tzcode/tzselect.ksh | 586 +++
contrib/tzcode/version | 1 +
contrib/tzcode/version.h | 3 +
contrib/tzcode/workman.sh | 41 +
contrib/tzcode/zdump.8 | 231 +
contrib/tzcode/zdump.c | 1257 ++++++
contrib/tzcode/zic.8 | 856 ++++
contrib/tzcode/zic.c | 4051 ++++++++++++++++++
contrib/tzcode/zic/README | 88 -
contrib/tzcode/zic/Theory | 570 ---
contrib/tzcode/zic/ialloc.c | 91 -
contrib/tzcode/zic/private.h | 272 --
contrib/tzcode/zic/scheck.c | 68 -
contrib/tzcode/zic/zdump.8 | 63 -
contrib/tzcode/zic/zdump.c | 668 ---
contrib/tzcode/zic/zdump/Makefile | 15 -
contrib/tzcode/zic/zic.8 | 468 --
contrib/tzcode/zic/zic.c | 2756 ------------
contrib/tzcode/zic/zic/Makefile | 16 -
lib/libc/stdtime/Makefile.inc | 10 +-
{contrib/tzcode => lib/libc}/stdtime/ctime.3 | 0
lib/libc/stdtime/strftime.c | 1 +
lib/libc/stdtime/strptime.c | 1 +
usr.sbin/Makefile | 1 +
usr.sbin/zdump/Makefile | 12 +
usr.sbin/{zic => }/zdump/Makefile.depend | 0
usr.sbin/zic/Makefile | 11 +-
usr.sbin/zic/{zic => }/Makefile.depend | 0
usr.sbin/zic/Makefile.inc | 3 -
usr.sbin/zic/README | 88 -
usr.sbin/zic/zdump/Makefile | 15 -
usr.sbin/zic/zic/Makefile | 22 -
62 files changed, 25079 insertions(+), 8326 deletions(-)
diff --cc contrib/tzcode/CONTRIBUTING
index 000000000000,4c0f56a50265..4c0f56a50265
mode 000000,100644..100644
--- a/contrib/tzcode/CONTRIBUTING
+++ b/contrib/tzcode/CONTRIBUTING
diff --cc contrib/tzcode/LICENSE
index 000000000000,8ba4399c622d..8ba4399c622d
mode 000000,100644..100644
--- a/contrib/tzcode/LICENSE
+++ b/contrib/tzcode/LICENSE
diff --cc contrib/tzcode/Makefile
index 000000000000,000000000000..afb9d538a203
new file mode 100644
--- /dev/null
+++ b/contrib/tzcode/Makefile
@@@ -1,0 -1,0 +1,1250 @@@
++# Make and install tzdb code and data.
++
++# This file is in the public domain, so clarified as of
++# 2009-05-17 by Arthur David Olson.
++
++# Package name for the code distribution.
++PACKAGE= tzcode
++
++# Version number for the distribution, overridden in the 'tarballs' rule below.
++VERSION= unknown
++
++# Email address for bug reports.
++BUGEMAIL= tz@iana.org
++
++# DATAFORM selects the data format.
++# Available formats represent essentially the same data, albeit
++# possibly with minor discrepancies that users are not likely to notice.
++# To get new features and the best data right away, use:
++# DATAFORM= vanguard
++# To wait a while before using new features, to give downstream users
++# time to upgrade zic (the default), use:
++# DATAFORM= main
++# To wait even longer for new features, use:
++# DATAFORM= rearguard
++# Rearguard users might also want "ZFLAGS = -b fat"; see below.
++DATAFORM= main
++
++# Change the line below for your timezone (after finding the one you want in
++# one of the $(TDATA) source files, or adding it to a source file).
++# Alternatively, if you discover you've got the wrong timezone, you can just
++# 'zic -l -' to remove it, or 'zic -l rightzone' to change it.
++# Use the command
++# make zonenames
++# to get a list of the values you can use for LOCALTIME.
++
++LOCALTIME= Factory
++
++# The POSIXRULES macro controls interpretation of nonstandard and obsolete
++# POSIX-like TZ settings like TZ='EET-2EEST' that lack DST transition rules.
++# Such a setting uses the rules in a template file to determine
++# "spring forward" and "fall back" days and times; the environment
++# variable itself specifies UT offsets of standard and daylight saving time.
++#
++# If POSIXRULES is '-', no template is installed; this is the default.
++#
++# Any other value for POSIXRULES is obsolete and should not be relied on, as:
++# * It does not work correctly in popular implementations such as GNU/Linux.
++# * It does not work even in tzcode, except for historical timestamps
++# that precede the last explicit transition in the POSIXRULES file.
++# Hence it typically does not work for current and future timestamps.
++# In short, software should avoid ruleless settings like TZ='EET-2EEST'
++# and so should not depend on the value of POSIXRULES.
++#
++# If, despite the above, you want a template for handling these settings,
++# you can change the line below (after finding the timezone you want in the
++# one of the $(TDATA) source files, or adding it to a source file).
++# Alternatively, if you discover you've got the wrong timezone, you can just
++# 'zic -p -' to remove it, or 'zic -p rightzone' to change it.
++# Use the command
++# make zonenames
++# to get a list of the values you can use for POSIXRULES.
++
++POSIXRULES= -
++
++# Also see TZDEFRULESTRING below, which takes effect only
++# if the time zone files cannot be accessed.
++
++
++# Installation locations.
++#
++# The defaults are suitable for Debian, except that if REDO is
++# posix_right or right_posix then files that Debian puts under
++# /usr/share/zoneinfo/posix and /usr/share/zoneinfo/right are instead
++# put under /usr/share/zoneinfo-posix and /usr/share/zoneinfo-leaps,
++# respectively. Problems with the Debian approach are discussed in
++# the commentary for the right_posix rule (below).
++
++# Destination directory, which can be used for staging.
++# 'make DESTDIR=/stage install' installs under /stage (e.g., to
++# /stage/etc/localtime instead of to /etc/localtime). Files under
++# /stage are not intended to work as-is, but can be copied by hand to
++# the root directory later. If DESTDIR is empty, 'make install' does
++# not stage, but installs directly into production locations.
++DESTDIR =
++
++# Everything is installed into subdirectories of TOPDIR, and used there.
++# TOPDIR should be empty (meaning the root directory),
++# or a directory name that does not end in "/".
++# TOPDIR should be empty or an absolute name unless you're just testing.
++TOPDIR =
++
++# The default local timezone is taken from the file TZDEFAULT.
++TZDEFAULT = $(TOPDIR)/etc/localtime
++
++# The subdirectory containing installed program and data files, and
++# likewise for installed files that can be shared among architectures.
++# These should be relative file names.
++USRDIR = usr
++USRSHAREDIR = $(USRDIR)/share
++
++# "Compiled" timezone information is placed in the "TZDIR" directory
++# (and subdirectories).
++# TZDIR_BASENAME should not contain "/" and should not be ".", ".." or empty.
++TZDIR_BASENAME= zoneinfo
++TZDIR = $(TOPDIR)/$(USRSHAREDIR)/$(TZDIR_BASENAME)
++
++# The "tzselect" and (if you do "make INSTALL") "date" commands go in:
++BINDIR = $(TOPDIR)/$(USRDIR)/bin
++
++# The "zdump" command goes in:
++ZDUMPDIR = $(BINDIR)
++
++# The "zic" command goes in:
++ZICDIR = $(TOPDIR)/$(USRDIR)/sbin
++
++# Manual pages go in subdirectories of. . .
++MANDIR = $(TOPDIR)/$(USRSHAREDIR)/man
++
++# Library functions are put in an archive in LIBDIR.
++LIBDIR = $(TOPDIR)/$(USRDIR)/lib
++
++
++# Types to try, as an alternative to time_t.
++TIME_T_ALTERNATIVES = $(TIME_T_ALTERNATIVES_HEAD) $(TIME_T_ALTERNATIVES_TAIL)
++TIME_T_ALTERNATIVES_HEAD = int_least64_t
++TIME_T_ALTERNATIVES_TAIL = int_least32_t uint_least32_t uint_least64_t
++
++# What kind of TZif data files to generate. (TZif is the binary time
++# zone data format that zic generates; see Internet RFC 8536.)
++# If you want only POSIX time, with time values interpreted as
++# seconds since the epoch (not counting leap seconds), use
++# REDO= posix_only
++# below. If you want only "right" time, with values interpreted
++# as seconds since the epoch (counting leap seconds), use
++# REDO= right_only
++# below. If you want both sets of data available, with leap seconds not
++# counted normally, use
++# REDO= posix_right
++# below. If you want both sets of data available, with leap seconds counted
++# normally, use
++# REDO= right_posix
++# below. POSIX mandates that leap seconds not be counted; for compatibility
++# with it, use "posix_only" or "posix_right". Use POSIX time on systems with
++# leap smearing; this can work better than unsmeared "right" time with
++# applications that are not leap second aware, and is closer to unsmeared
++# "right" time than unsmeared POSIX time is (e.g., 0.5 vs 1.0 s max error).
++
++REDO= posix_right
++
++# Whether to put an "Expires" line in the leapseconds file.
++# Use EXPIRES_LINE=1 to put the line in, 0 to omit it.
++# The EXPIRES_LINE value matters only if REDO's value contains "right".
++# If you change EXPIRES_LINE, remove the leapseconds file before running "make".
++# zic's support for the Expires line was introduced in tzdb 2020a,
++# and was modified in tzdb 2021b to generate version 4 TZif files.
++# EXPIRES_LINE defaults to 0 for now so that the leapseconds file
++# can be given to pre-2020a zic implementations and so that TZif files
++# built by newer zic implementations can be read by pre-2021b libraries.
++EXPIRES_LINE= 0
++
++# To install data in text form that has all the information of the TZif data,
++# (optionally incorporating leap second information), use
++# TZDATA_TEXT= tzdata.zi leapseconds
++# To install text data without leap second information (e.g., because
++# REDO='posix_only'), use
++# TZDATA_TEXT= tzdata.zi
++# To avoid installing text data, use
++# TZDATA_TEXT=
++
++TZDATA_TEXT= leapseconds tzdata.zi
++
++# For backward-compatibility links for old zone names, use
++# BACKWARD= backward
++# To omit these links, use
++# BACKWARD=
++
++BACKWARD= backward
++
++# If you want out-of-scope and often-wrong data from the file 'backzone',
++# but only for entries listed in the backward-compatibility file zone.tab, use
++# PACKRATDATA= backzone
++# PACKRATLIST= zone.tab
++# If you want all the 'backzone' data, use
++# PACKRATDATA= backzone
++# PACKRATLIST=
++# To omit this data, use
++# PACKRATDATA=
++# PACKRATLIST=
++
++PACKRATDATA=
++PACKRATLIST=
++
++# The name of a locale using the UTF-8 encoding, used during self-tests.
++# The tests are skipped if the name does not appear to work on this system.
++
++UTF8_LOCALE= en_US.utf8
++
++# Non-default libraries needed to link.
++# On some hosts, this should have -lintl unless CFLAGS has -DHAVE_GETTEXT=0.
++LDLIBS=
++
++# Add the following to the end of the "CFLAGS=" line as needed to override
++# defaults specified in the source code. "-DFOO" is equivalent to "-DFOO=1".
++# -DDEPRECATE_TWO_DIGIT_YEARS for optional runtime warnings about strftime
++# formats that generate only the last two digits of year numbers
++# -DEPOCH_LOCAL if the 'time' function returns local time not UT
++# -DEPOCH_OFFSET=N if the 'time' function returns a value N greater
++# than what POSIX specifies, assuming local time is UT.
++# For example, N is 252460800 on AmigaOS.
++# -DHAVE_DECL_ASCTIME_R=0 if <time.h> does not declare asctime_r
++# -DHAVE_DECL_ENVIRON if <unistd.h> declares 'environ'
++# -DHAVE_DECL_TIMEGM=0 if <time.h> does not declare timegm
++# -DHAVE_DIRECT_H if mkdir needs <direct.h> (MS-Windows)
++# -DHAVE_GENERIC=0 if _Generic does not work*
++# -DHAVE_GETRANDOM if getrandom works (e.g., GNU/Linux),
++# -DHAVE_GETRANDOM=0 to avoid using getrandom
++# -DHAVE_GETTEXT if gettext works (e.g., GNU/Linux, FreeBSD, Solaris),
++# where LDLIBS also needs to contain -lintl on some hosts;
++# -DHAVE_GETTEXT=0 to avoid using gettext
++# -DHAVE_INCOMPATIBLE_CTIME_R if your system's time.h declares
++# ctime_r and asctime_r incompatibly with the POSIX standard
++# (Solaris when _POSIX_PTHREAD_SEMANTICS is not defined).
++# -DHAVE_INTTYPES_H=0 if <inttypes.h> does not work*
++# -DHAVE_LINK=0 if your system lacks a link function
++# -DHAVE_LOCALTIME_R=0 if your system lacks a localtime_r function
++# -DHAVE_LOCALTIME_RZ=0 if you do not want zdump to use localtime_rz
++# localtime_rz can make zdump significantly faster, but is nonstandard.
++# -DHAVE_MALLOC_ERRNO=0 if malloc etc. do not set errno on failure.
++# -DHAVE_POSIX_DECLS=0 if your system's include files do not declare
++# functions like 'link' or variables like 'tzname' required by POSIX
++# -DHAVE_SETENV=0 if your system lacks the setenv function
++# -DHAVE_SNPRINTF=0 if your system lacks the snprintf function
++# -DHAVE_STDCKDINT_H=0 if neither <stdckdint.h> nor substitutes like
++# __builtin_add_overflow work*
++# -DHAVE_STDINT_H=0 if <stdint.h> does not work*
++# -DHAVE_STRFTIME_L if <time.h> declares locale_t and strftime_l
++# -DHAVE_STRDUP=0 if your system lacks the strdup function
++# -DHAVE_STRTOLL=0 if your system lacks the strtoll function
++# -DHAVE_SYMLINK=0 if your system lacks the symlink function
++# -DHAVE_SYS_STAT_H=0 if <sys/stat.h> does not work*
++# -DHAVE_TZSET=0 if your system lacks a tzset function
++# -DHAVE_UNISTD_H=0 if <unistd.h> does not work*
++# -DHAVE_UTMPX_H=0 if <utmpx.h> does not work*
++# -Dlocale_t=XXX if your system uses XXX instead of locale_t
++# -DRESERVE_STD_EXT_IDS if your platform reserves standard identifiers
++# with external linkage, e.g., applications cannot define 'localtime'.
++# -Dssize_t=long on hosts like MS-Windows that lack ssize_t
++# -DSUPPRESS_TZDIR to not prepend TZDIR to file names; this has
++# security implications and is not recommended for general use
++# -DTHREAD_SAFE to make localtime.c thread-safe, as POSIX requires;
++# not needed by the main-program tz code, which is single-threaded.
++# Append other compiler flags as needed, e.g., -pthread on GNU/Linux.
++# -Dtime_tz=\"T\" to use T as the time_t type, rather than the system time_t
++# This is intended for internal use only; it mangles external names.
++# -DTZ_DOMAIN=\"foo\" to use "foo" for gettext domain name; default is "tz"
++# -DTZ_DOMAINDIR=\"/path\" to use "/path" for gettext directory;
++# the default is system-supplied, typically "/usr/lib/locale"
++# -DTZDEFRULESTRING=\",date/time,date/time\" to default to the specified
++# DST transitions if the time zone files cannot be accessed
++# -DUNINIT_TRAP if reading uninitialized storage can cause problems
++# other than simply getting garbage data
++# -DUSE_LTZ=0 to build zdump with the system time zone library
++# Also set TZDOBJS=zdump.o and CHECK_TIME_T_ALTERNATIVES= below.
++# -DZIC_BLOAT_DEFAULT=\"fat\" to default zic's -b option to "fat", and
++# similarly for "slim". Fat TZif files work around incompatibilities
++# and bugs in some TZif readers, notably older ones that
++# ignore or otherwise mishandle 64-bit data in TZif files;
++# however, fat TZif files may trigger bugs in newer TZif readers.
++# Slim TZif files are more efficient, and are the default.
++# -DZIC_MAX_ABBR_LEN_WO_WARN=3
++# (or some other number) to set the maximum time zone abbreviation length
++# that zic will accept without a warning (the default is 6)
++# $(GCC_DEBUG_FLAGS) if you are using recent GCC and want lots of checking
++#
++# * Options marked "*" can be omitted if your compiler is C23 compatible.
++#
++# Select instrumentation via "make GCC_INSTRUMENT='whatever'".
++GCC_INSTRUMENT = \
++ -fsanitize=undefined -fsanitize-address-use-after-scope \
++ -fsanitize-undefined-trap-on-error -fstack-protector
++# Omit -fanalyzer from GCC_DEBUG_FLAGS, as it makes GCC too slow.
++GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
++ $(GCC_INSTRUMENT) \
++ -Wall -Wextra \
++ -Walloc-size-larger-than=100000 -Warray-bounds=2 \
++ -Wbad-function-cast -Wbidi-chars=any,ucn -Wcast-align=strict -Wdate-time \
++ -Wdeclaration-after-statement -Wdouble-promotion \
++ -Wduplicated-branches -Wduplicated-cond \
++ -Wformat=2 -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation \
++ -Wimplicit-fallthrough=5 -Winit-self -Wlogical-op \
++ -Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
++ -Wnull-dereference \
++ -Wold-style-definition -Woverlength-strings -Wpointer-arith \
++ -Wshadow -Wshift-overflow=2 -Wstrict-overflow \
++ -Wstrict-prototypes -Wstringop-overflow=4 \
++ -Wstringop-truncation -Wsuggest-attribute=cold \
++ -Wsuggest-attribute=const -Wsuggest-attribute=format \
++ -Wsuggest-attribute=malloc \
++ -Wsuggest-attribute=noreturn -Wsuggest-attribute=pure \
++ -Wtrampolines -Wundef -Wuninitialized -Wunused-macros -Wuse-after-free=3 \
++ -Wvariadic-macros -Wvla -Wwrite-strings \
++ -Wno-address -Wno-format-nonliteral -Wno-sign-compare \
++ -Wno-type-limits
++#
++# If your system has a "GMT offset" field in its "struct tm"s
++# (or if you decide to add such a field in your system's "time.h" file),
++# add the name to a define such as
++# -DTM_GMTOFF=tm_gmtoff
++# to the end of the "CFLAGS=" line. If not defined, the code attempts to
++# guess TM_GMTOFF from other macros; define NO_TM_GMTOFF to suppress this.
++# Similarly, if your system has a "zone abbreviation" field, define
++# -DTM_ZONE=tm_zone
++# and define NO_TM_ZONE to suppress any guessing. Although these two fields
++# not required by POSIX, a future version of POSIX is planned to require them
++# and they are widely available on GNU/Linux and BSD systems.
++#
++# The next batch of options control support for external variables
++# exported by tzcode. In practice these variables are less useful
++# than TM_GMTOFF and TM_ZONE. However, most of them are standardized.
++# #
++# # To omit or support the external variable "tzname", add one of:
++# # -DHAVE_TZNAME=0 # do not support "tzname"
++# # -DHAVE_TZNAME=1 # support "tzname", which is defined by system library
++# # -DHAVE_TZNAME=2 # support and define "tzname"
++# # to the "CFLAGS=" line. "tzname" is required by POSIX 1988 and later.
++# # If not defined, the code attempts to guess HAVE_TZNAME from other macros.
++# # Warning: unless time_tz is also defined, HAVE_TZNAME=1 can cause
++# # crashes when combined with some platforms' standard libraries,
++# # presumably due to memory allocation issues.
++# #
++# # To omit or support the external variables "timezone" and "daylight", add
++# # -DUSG_COMPAT=0 # do not support
++# # -DUSG_COMPAT=1 # support, and variables are defined by system library
++# # -DUSG_COMPAT=2 # support and define variables
++# # to the "CFLAGS=" line; "timezone" and "daylight" are inspired by
++# # Unix Systems Group code and are required by POSIX 2008 (with XSI) and later.
++# # If not defined, the code attempts to guess USG_COMPAT from other macros.
++# #
++# # To support the external variable "altzone", add
++# # -DALTZONE=0 # do not support
++# # -DALTZONE=1 # support "altzone", which is defined by system library
++# # -DALTZONE=2 # support and define "altzone"
++# # to the end of the "CFLAGS=" line; although "altzone" appeared in
++# # System V Release 3.1 it has not been standardized.
++# # If not defined, the code attempts to guess ALTZONE from other macros.
++#
++# If you want functions that were inspired by early versions of X3J11's work,
++# add
++# -DSTD_INSPIRED
++# to the end of the "CFLAGS=" line. This arranges for the following
++# functions to be added to the time conversion library.
++# "offtime" is like "gmtime" except that it accepts a second (long) argument
++# that gives an offset to add to the time_t when converting it.
++# "timelocal" is equivalent to "mktime".
++# "timeoff" is like "timegm" except that it accepts a second (long) argument
++# that gives an offset to use when converting to a time_t.
++# "posix2time" and "time2posix" are described in an included manual page.
++# X3J11's work does not describe any of these functions.
++# These functions may well disappear in future releases of the time
++# conversion package.
++#
++# If you don't want functions that were inspired by NetBSD, add
++# -DNETBSD_INSPIRED=0
++# to the end of the "CFLAGS=" line. Otherwise, the functions
++# "localtime_rz", "mktime_z", "tzalloc", and "tzfree" are added to the
++# time library, and if STD_INSPIRED is also defined the functions
++# "posix2time_z" and "time2posix_z" are added as well.
++# The functions ending in "_z" (or "_rz") are like their unsuffixed
++# (or suffixed-by-"_r") counterparts, except with an extra first
++# argument of opaque type timezone_t that specifies the timezone.
++# "tzalloc" allocates a timezone_t value, and "tzfree" frees it.
++#
++# If you want to allocate state structures in localtime, add
++# -DALL_STATE
++# to the end of the "CFLAGS=" line. Storage is obtained by calling malloc.
++#
++# NIST-PCTS:151-2, Version 1.4, (1993-12-03) is a test suite put
++# out by the National Institute of Standards and Technology
++# which claims to test C and Posix conformance. If you want to pass PCTS, add
++# -DPCTS
++# to the end of the "CFLAGS=" line.
++#
++# If you want strict compliance with XPG4 as of 1994-04-09, add
++# -DXPG4_1994_04_09
++# to the end of the "CFLAGS=" line. This causes "strftime" to always return
++# 53 as a week number (rather than 52 or 53) for January days before
++# January's first Monday when a "%V" format is used and January 1
++# falls on a Friday, Saturday, or Sunday.
++
++CFLAGS=
++
++# Linker flags. Default to $(LFLAGS) for backwards compatibility
++# to release 2012h and earlier.
++
++LDFLAGS= $(LFLAGS)
++
++# For leap seconds, this Makefile uses LEAPSECONDS='-L leapseconds' in
++# submake command lines. The default is no leap seconds.
++
++LEAPSECONDS=
++
++# The zic command and its arguments.
++
++zic= ./zic
++ZIC= $(zic) $(ZFLAGS)
++
++# To shrink the size of installed TZif files,
++# append "-r @N" to omit data before N-seconds-after-the-Epoch.
++# To grow the files and work around bugs in older applications,
++# possibly at the expense of introducing bugs in newer ones,
++# append "-b fat"; see ZIC_BLOAT_DEFAULT above.
++# See the zic man page for more about -b and -r.
++ZFLAGS=
++
++# How to use zic to install TZif files.
++
++ZIC_INSTALL= $(ZIC) -d '$(DESTDIR)$(TZDIR)' $(LEAPSECONDS)
++
++# The name of a Posix-compliant 'awk' on your system.
++# mawk 1.3.3 and Solaris 10 /usr/bin/awk do not work.
++# Also, it is better (though not essential) if 'awk' supports UTF-8,
++# and unfortunately mawk and busybox awk do not support UTF-8.
++# Try AWK=gawk or AWK=nawk if your awk has the abovementioned problems.
++AWK= awk
++
++# The full path name of a Posix-compliant shell, preferably one that supports
++# the Korn shell's 'select' statement as an extension.
++# These days, Bash is the most popular.
++# It should be OK to set this to /bin/sh, on platforms where /bin/sh
++# lacks 'select' or doesn't completely conform to Posix, but /bin/bash
++# is typically nicer if it works.
++KSHELL= /bin/bash
++
++# Name of curl <https://curl.haxx.se/>, used for HTML validation.
++CURL= curl
++
++# Name of GNU Privacy Guard <https://gnupg.org/>, used to sign distributions.
++GPG= gpg
++
++# This expensive test requires USE_LTZ.
++# To suppress it, define this macro to be empty.
++CHECK_TIME_T_ALTERNATIVES = check_time_t_alternatives
++
++# SAFE_CHAR is a regular expression that matches a safe character.
++# Some parts of this distribution are limited to safe characters;
++# others can use any UTF-8 character.
++# For now, the safe characters are a safe subset of ASCII.
++# The caller must set the shell variable 'sharp' to the character '#',
++# since Makefile macros cannot contain '#'.
++# TAB_CHAR is a single tab character, in single quotes.
++TAB_CHAR= ' '
++SAFE_CHARSET1= $(TAB_CHAR)' !\"'$$sharp'$$%&'\''()*+,./0123456789:;<=>?@'
++SAFE_CHARSET2= 'ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\^_`'
++SAFE_CHARSET3= 'abcdefghijklmnopqrstuvwxyz{|}~'
++SAFE_CHARSET= $(SAFE_CHARSET1)$(SAFE_CHARSET2)$(SAFE_CHARSET3)
++SAFE_CHAR= '[]'$(SAFE_CHARSET)'-]'
++
++# These characters are Latin-1, and so are likely to be displayable
++# even in editors with limited character sets.
++UNUSUAL_OK_LATIN_1 = «°±»½¾×
++# This IPA symbol is represented in Unicode as the composition of
++# U+0075 and U+032F, and U+032F is not considered alphabetic by some
++# grep implementations that do not grok composition.
++UNUSUAL_OK_IPA = u̯
++# Non-ASCII non-letters that OK_CHAR allows, as these characters are
++# useful in commentary.
++UNUSUAL_OK_CHARSET= $(UNUSUAL_OK_LATIN_1)$(UNUSUAL_OK_IPA)
++
++# Put this in a bracket expression to match spaces.
++s = [:space:]
++
++# OK_CHAR matches any character allowed in the distributed files.
++# This is the same as SAFE_CHAR, except that UNUSUAL_OK_CHARSET and
++# multibyte letters are also allowed so that commentary can contain a
++# few safe symbols and people's names and can quote non-English sources.
++# Other non-letters are limited to ASCII renderings for the
++# convenience of maintainers using XEmacs 21.5.34, which by default
++# mishandles Unicode characters U+0100 and greater.
++OK_CHAR= '[][:alpha:]$(UNUSUAL_OK_CHARSET)'$(SAFE_CHARSET)'-]'
++
++# SAFE_LINE matches a line of safe characters.
++# SAFE_SHARP_LINE is similar, except any OK character can follow '#';
++# this is so that comments can contain non-ASCII characters.
++# OK_LINE matches a line of OK characters.
++SAFE_LINE= '^'$(SAFE_CHAR)'*$$'
++SAFE_SHARP_LINE='^'$(SAFE_CHAR)'*('$$sharp$(OK_CHAR)'*)?$$'
++OK_LINE= '^'$(OK_CHAR)'*$$'
++
++# Flags to give 'tar' when making a distribution.
++# Try to use flags appropriate for GNU tar.
++GNUTARFLAGS= --format=pax --pax-option='delete=atime,delete=ctime' \
++ --numeric-owner --owner=0 --group=0 \
++ --mode=go+u,go-w --sort=name
++TARFLAGS= `if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; \
++ then echo $(GNUTARFLAGS); \
++ else :; \
++ fi`
++
++# Flags to give 'gzip' when making a distribution.
++GZIPFLAGS= -9n
++
++# When comparing .tzs files, use GNU diff's -F'^TZ=' option if supported.
++# This makes it easier to see which Zone has been affected.
++DIFF_TZS= diff -u$$(! diff -u -F'^TZ=' - - <>/dev/null >&0 2>&1 \
++ || echo ' -F^TZ=')
++
++###############################################################################
++
++#MAKE= make
++
++cc= cc
++CC= $(cc) -DTZDIR='"$(TZDIR)"'
++
++AR= ar
++
++# ':' on typical hosts; 'ranlib' on the ancient hosts that still need ranlib.
++RANLIB= :
++
++TZCOBJS= zic.o
++TZDOBJS= zdump.o localtime.o asctime.o strftime.o
++DATEOBJS= date.o localtime.o strftime.o asctime.o
++LIBSRCS= localtime.c asctime.c difftime.c strftime.c
++LIBOBJS= localtime.o asctime.o difftime.o strftime.o
++HEADERS= tzfile.h private.h
++NONLIBSRCS= zic.c zdump.c
++NEWUCBSRCS= date.c
++SOURCES= $(HEADERS) $(LIBSRCS) $(NONLIBSRCS) $(NEWUCBSRCS) \
++ tzselect.ksh workman.sh
++MANS= newctime.3 newstrftime.3 newtzset.3 time2posix.3 \
++ tzfile.5 tzselect.8 zic.8 zdump.8
++MANTXTS= newctime.3.txt newstrftime.3.txt newtzset.3.txt \
++ time2posix.3.txt \
++ tzfile.5.txt tzselect.8.txt zic.8.txt zdump.8.txt \
++ date.1.txt
++COMMON= calendars CONTRIBUTING LICENSE Makefile \
++ NEWS README SECURITY theory.html version
++WEB_PAGES= tz-art.html tz-how-to.html tz-link.html
++CHECK_WEB_PAGES=check_theory.html check_tz-art.html \
++ check_tz-how-to.html check_tz-link.html
++DOCS= $(MANS) date.1 $(MANTXTS) $(WEB_PAGES)
++PRIMARY_YDATA= africa antarctica asia australasia \
++ europe northamerica southamerica
++YDATA= $(PRIMARY_YDATA) etcetera
++NDATA= factory
++TDATA_TO_CHECK= $(YDATA) $(NDATA) backward
++TDATA= $(YDATA) $(NDATA) $(BACKWARD)
++ZONETABLES= zone1970.tab zone.tab
++TABDATA= iso3166.tab $(TZDATA_TEXT) $(ZONETABLES)
++LEAP_DEPS= leapseconds.awk leap-seconds.list
++TZDATA_ZI_DEPS= ziguard.awk zishrink.awk version $(TDATA) \
++ $(PACKRATDATA) $(PACKRATLIST)
++DSTDATA_ZI_DEPS= ziguard.awk $(TDATA) $(PACKRATDATA) $(PACKRATLIST)
++DATA= $(TDATA_TO_CHECK) backzone iso3166.tab leap-seconds.list \
++ leapseconds $(ZONETABLES)
++AWK_SCRIPTS= checklinks.awk checktab.awk leapseconds.awk \
++ ziguard.awk zishrink.awk
++MISC= $(AWK_SCRIPTS)
++TZS_YEAR= 2050
++TZS_CUTOFF_FLAG= -c $(TZS_YEAR)
++TZS= to$(TZS_YEAR).tzs
++TZS_NEW= to$(TZS_YEAR)new.tzs
++TZS_DEPS= $(YDATA) asctime.c localtime.c \
++ private.h tzfile.h zdump.c zic.c
++TZDATA_DIST = $(COMMON) $(DATA) $(MISC)
++# EIGHT_YARDS is just a yard short of the whole ENCHILADA.
++EIGHT_YARDS = $(TZDATA_DIST) $(DOCS) $(SOURCES) tzdata.zi
++ENCHILADA = $(EIGHT_YARDS) $(TZS)
++
++# Consult these files when deciding whether to rebuild the 'version' file.
++# This list is not the same as the output of 'git ls-files', since
++# .gitignore is not distributed.
++VERSION_DEPS= \
++ calendars CONTRIBUTING LICENSE Makefile NEWS README SECURITY \
++ africa antarctica asctime.c asia australasia \
++ backward backzone \
++ checklinks.awk checktab.awk \
++ date.1 date.c difftime.c \
++ etcetera europe factory iso3166.tab \
++ leap-seconds.list leapseconds.awk localtime.c \
++ newctime.3 newstrftime.3 newtzset.3 northamerica \
++ private.h southamerica strftime.c theory.html \
++ time2posix.3 tz-art.html tz-how-to.html tz-link.html \
++ tzfile.5 tzfile.h tzselect.8 tzselect.ksh \
++ workman.sh zdump.8 zdump.c zic.8 zic.c \
++ ziguard.awk zishrink.awk \
++ zone.tab zone1970.tab
++
++# And for the benefit of csh users on systems that assume the user
++# shell should be used to handle commands in Makefiles. . .
++
++SHELL= /bin/sh
++
++all: tzselect zic zdump libtz.a $(TABDATA) \
++ vanguard.zi main.zi rearguard.zi
++
++ALL: all date $(ENCHILADA)
++
++install: all $(DATA) $(REDO) $(MANS)
++ mkdir -p '$(DESTDIR)$(BINDIR)' \
++ '$(DESTDIR)$(ZDUMPDIR)' '$(DESTDIR)$(ZICDIR)' \
++ '$(DESTDIR)$(LIBDIR)' \
++ '$(DESTDIR)$(MANDIR)/man3' '$(DESTDIR)$(MANDIR)/man5' \
++ '$(DESTDIR)$(MANDIR)/man8'
++ $(ZIC_INSTALL) -l $(LOCALTIME) \
++ `case '$(POSIXRULES)' in ?*) echo '-p';; esac \
++ ` $(POSIXRULES) \
++ -t '$(DESTDIR)$(TZDEFAULT)'
++ cp -f $(TABDATA) '$(DESTDIR)$(TZDIR)/.'
++ cp tzselect '$(DESTDIR)$(BINDIR)/.'
++ cp zdump '$(DESTDIR)$(ZDUMPDIR)/.'
++ cp zic '$(DESTDIR)$(ZICDIR)/.'
++ cp libtz.a '$(DESTDIR)$(LIBDIR)/.'
++ $(RANLIB) '$(DESTDIR)$(LIBDIR)/libtz.a'
++ cp -f newctime.3 newtzset.3 '$(DESTDIR)$(MANDIR)/man3/.'
++ cp -f tzfile.5 '$(DESTDIR)$(MANDIR)/man5/.'
++ cp -f tzselect.8 zdump.8 zic.8 '$(DESTDIR)$(MANDIR)/man8/.'
++
++INSTALL: ALL install date.1
++ mkdir -p '$(DESTDIR)$(BINDIR)' '$(DESTDIR)$(MANDIR)/man1'
++ cp date '$(DESTDIR)$(BINDIR)/.'
++ cp -f date.1 '$(DESTDIR)$(MANDIR)/man1/.'
++
++# Calculate version number from git, if available.
++# Otherwise, use $(VERSION) unless it is "unknown" and there is already
++# a 'version' file, in which case reuse the existing 'version' contents
++# and append "-dirty" if the contents do not already end in "-dirty".
++version: $(VERSION_DEPS)
++ { (type git) >/dev/null 2>&1 && \
++ V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
++ --abbrev=7 --dirty` || \
++ if test '$(VERSION)' = unknown && V=`cat $@`; then \
++ case $$V in *-dirty);; *) V=$$V-dirty;; esac; \
++ else \
++ V='$(VERSION)'; \
++ fi; } && \
++ printf '%s\n' "$$V" >$@.out
++ mv $@.out $@
++
++# These files can be tailored by setting BACKWARD, PACKRATDATA, PACKRATLIST.
++vanguard.zi main.zi rearguard.zi: $(DSTDATA_ZI_DEPS)
++ $(AWK) \
++ -v DATAFORM=`expr $@ : '\(.*\).zi'` \
++ -v PACKRATDATA='$(PACKRATDATA)' \
++ -v PACKRATLIST='$(PACKRATLIST)' \
++ -f ziguard.awk \
++ $(TDATA) $(PACKRATDATA) >$@.out
++ mv $@.out $@
++# This file has a version comment that attempts to capture any tailoring
++# via BACKWARD, DATAFORM, PACKRATDATA, PACKRATLIST, and REDO.
++tzdata.zi: $(DATAFORM).zi version zishrink.awk
++ version=`sed 1q version` && \
++ LC_ALL=C $(AWK) \
++ -v dataform='$(DATAFORM)' \
++ -v deps='$(DSTDATA_ZI_DEPS) zishrink.awk' \
++ -v redo='$(REDO)' \
++ -v version="$$version" \
++ -f zishrink.awk \
++ $(DATAFORM).zi >$@.out
++ mv $@.out $@
++
++version.h: version
++ VERSION=`cat version` && printf '%s\n' \
++ 'static char const PKGVERSION[]="($(PACKAGE)) ";' \
++ "static char const TZVERSION[]=\"$$VERSION\";" \
++ 'static char const REPORT_BUGS_TO[]="$(BUGEMAIL)";' \
++ >$@.out
++ mv $@.out $@
++
++zdump: $(TZDOBJS)
++ $(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(TZDOBJS) $(LDLIBS)
++
++zic: $(TZCOBJS)
++ $(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(TZCOBJS) $(LDLIBS)
++
++leapseconds: $(LEAP_DEPS)
++ $(AWK) -v EXPIRES_LINE=$(EXPIRES_LINE) \
++ -f leapseconds.awk leap-seconds.list >$@.out
++ mv $@.out $@
++
++# Arguments to pass to submakes of install_data.
++# They can be overridden by later submake arguments.
++INSTALLARGS = \
++ BACKWARD='$(BACKWARD)' \
++ DESTDIR='$(DESTDIR)' \
++ LEAPSECONDS='$(LEAPSECONDS)' \
++ PACKRATDATA='$(PACKRATDATA)' \
++ PACKRATLIST='$(PACKRATLIST)' \
++ TZDEFAULT='$(TZDEFAULT)' \
++ TZDIR='$(TZDIR)' \
++ ZIC='$(ZIC)'
++
++INSTALL_DATA_DEPS = zic leapseconds tzdata.zi
++
++# 'make install_data' installs one set of TZif files.
++install_data: $(INSTALL_DATA_DEPS)
++ $(ZIC_INSTALL) tzdata.zi
++
++posix_only: $(INSTALL_DATA_DEPS)
++ $(MAKE) $(INSTALLARGS) LEAPSECONDS= install_data
++
++right_only: $(INSTALL_DATA_DEPS)
++ $(MAKE) $(INSTALLARGS) LEAPSECONDS='-L leapseconds' \
++ install_data
++
++# In earlier versions of this makefile, the other two directories were
++# subdirectories of $(TZDIR). However, this led to configuration errors.
++# For example, with posix_right under the earlier scheme,
++# TZ='right/Australia/Adelaide' got you localtime with leap seconds,
++# but gmtime without leap seconds, which led to problems with applications
++# like sendmail that subtract gmtime from localtime.
++# Therefore, the other two directories are now siblings of $(TZDIR).
++# You must replace all of $(TZDIR) to switch from not using leap seconds
++# to using them, or vice versa.
++right_posix: right_only
++ rm -fr '$(DESTDIR)$(TZDIR)-leaps'
++ ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-leaps' || \
++ $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
++ $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
++
++posix_right: posix_only
++ rm -fr '$(DESTDIR)$(TZDIR)-posix'
++ ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-posix' || \
++ $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
++ $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
++
++zones: $(REDO)
++
++# dummy.zd is not a real file; it is mentioned here only so that the
++# top-level 'make' does not have a syntax error.
++ZDS = dummy.zd
++# Rule used only by submakes invoked by the $(TZS_NEW) rule.
++# It is separate so that GNU 'make -j' can run instances in parallel.
++$(ZDS): zdump
++ ./zdump -i $(TZS_CUTOFF_FLAG) '$(wd)/'$$(expr $@ : '\(.*\).zd') \
++ >$@
++
++TZS_NEW_DEPS = tzdata.zi zdump zic
++$(TZS_NEW): $(TZS_NEW_DEPS)
++ rm -fr tzs$(TZS_YEAR).dir
++ mkdir tzs$(TZS_YEAR).dir
++ $(zic) -d tzs$(TZS_YEAR).dir tzdata.zi
++ $(AWK) '/^L/{print "Link\t" $$2 "\t" $$3}' \
++ tzdata.zi | LC_ALL=C sort >$@.out
++ wd=`pwd` && \
++ x=`$(AWK) '/^Z/{print "tzs$(TZS_YEAR).dir/" $$2 ".zd"}' \
++ tzdata.zi \
++ | LC_ALL=C sort -t . -k 2,2` && \
++ set x $$x && \
++ shift && \
++ ZDS=$$* && \
++ $(MAKE) wd="$$wd" TZS_CUTOFF_FLAG="$(TZS_CUTOFF_FLAG)" \
++ ZDS="$$ZDS" $$ZDS && \
++ sed 's,^TZ=".*\.dir/,TZ=",' $$ZDS >>$@.out
++ rm -fr tzs$(TZS_YEAR).dir
++ mv $@.out $@
++
++# If $(TZS) exists but 'make check_tzs' fails, a maintainer should inspect the
++# failed output and fix the inconsistency, perhaps by running 'make force_tzs'.
++$(TZS):
++ touch $@
++
++force_tzs: $(TZS_NEW)
++ cp $(TZS_NEW) $(TZS)
++
++libtz.a: $(LIBOBJS)
++ rm -f $@
++ $(AR) -rc $@ $(LIBOBJS)
++ $(RANLIB) $@
++
++date: $(DATEOBJS)
++ $(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(DATEOBJS) $(LDLIBS)
++
++tzselect: tzselect.ksh version
++ VERSION=`cat version` && sed \
++ -e 's|#!/bin/bash|#!$(KSHELL)|g' \
++ -e 's|AWK=[^}]*|AWK='\''$(AWK)'\''|g' \
++ -e 's|\(PKGVERSION\)=.*|\1='\''($(PACKAGE)) '\''|' \
++ -e 's|\(REPORT_BUGS_TO\)=.*|\1=$(BUGEMAIL)|' \
++ -e 's|TZDIR=[^}]*|TZDIR=$(TZDIR)|' \
++ -e 's|\(TZVERSION\)=.*|\1='"$$VERSION"'|' \
++ <$@.ksh >$@.out
++ chmod +x $@.out
++ mv $@.out $@
++
++check: check_back check_mild
++check_mild: check_character_set check_white_space check_links \
++ check_name_lengths check_slashed_abbrs check_sorted \
++ check_tables check_web check_ziguard check_zishrink check_tzs
++
++check_character_set: $(ENCHILADA)
++ test ! '$(UTF8_LOCALE)' || \
++ ! printf 'A\304\200B\n' | \
++ LC_ALL='$(UTF8_LOCALE)' grep -q '^A.B$$' >/dev/null 2>&1 || { \
++ LC_ALL='$(UTF8_LOCALE)' && export LC_ALL && \
++ sharp='#' && \
++ ! grep -Env $(SAFE_LINE) $(MANS) date.1 $(MANTXTS) \
++ $(MISC) $(SOURCES) $(WEB_PAGES) \
++ CONTRIBUTING LICENSE README SECURITY \
++ version tzdata.zi && \
++ ! grep -Env $(SAFE_LINE)'|^UNUSUAL_OK_'$(OK_CHAR)'*$$' \
++ Makefile && \
++ ! grep -Env $(SAFE_SHARP_LINE) $(TDATA_TO_CHECK) backzone \
++ leapseconds zone.tab && \
++ ! grep -Env $(OK_LINE) $(ENCHILADA); \
++ }
++ touch $@
++
++check_white_space: $(ENCHILADA)
++ patfmt=' \t|[\f\r\v]' && pat=`printf "$$patfmt\\n"` && \
++ ! grep -En "$$pat" \
++ $$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list)
++ ! grep -n '[$s]$$' \
++ $$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list)
++ touch $@
++
++PRECEDES_FILE_NAME = ^(Zone|Link[$s]+[^$s]+)[$s]+
++FILE_NAME_COMPONENT_TOO_LONG = $(PRECEDES_FILE_NAME)[^$s]*[^/$s]{15}
++
++check_name_lengths: $(TDATA_TO_CHECK) backzone
++ ! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \
++ $(TDATA_TO_CHECK) backzone
++ touch $@
++
++PRECEDES_STDOFF = ^(Zone[$s]+[^$s]+)?[$s]+
++STDOFF = [-+]?[0-9:.]+
++RULELESS_SAVE = (-|$(STDOFF)[sd]?)
++RULELESS_SLASHED_ABBRS = \
++ $(PRECEDES_STDOFF)$(STDOFF)[$s]+$(RULELESS_SAVE)[$s]+[^$s]*/
++
++check_slashed_abbrs: $(TDATA_TO_CHECK)
++ ! grep -En '$(RULELESS_SLASHED_ABBRS)' $(TDATA_TO_CHECK)
++ touch $@
++
++CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; }
++
++check_sorted: backward backzone iso3166.tab zone.tab zone1970.tab
++ $(AWK) '/^Link/ {printf "%.5d %s\n", g, $$3} !/./ {g++}' \
++ backward | LC_ALL=C sort -cu
++ $(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu
++ touch $@
++
++check_back: checklinks.awk $(TDATA_TO_CHECK)
++ $(AWK) \
++ -v DATAFORM=$(DATAFORM) \
++ -v backcheck=backward \
++ -f checklinks.awk $(TDATA_TO_CHECK)
++ touch $@
++
++check_links: checklinks.awk tzdata.zi
++ $(AWK) \
++ -v DATAFORM=$(DATAFORM) \
++ -f checklinks.awk tzdata.zi
++ touch $@
++
++check_tables: checktab.awk $(YDATA) backward $(ZONETABLES)
++ for tab in $(ZONETABLES); do \
++ test "$$tab" = zone.tab && links='$(BACKWARD)' || links=''; \
++ $(AWK) -f checktab.awk -v zone_table=$$tab $(YDATA) $$links \
++ || exit; \
++ done
++ touch $@
++
++check_tzs: $(TZS) $(TZS_NEW)
++ if test -s $(TZS); then \
++ $(DIFF_TZS) $(TZS) $(TZS_NEW); \
++ else \
++ cp $(TZS_NEW) $(TZS); \
++ fi
++ touch $@
++
++check_web: $(CHECK_WEB_PAGES)
++check_theory.html: theory.html
++check_tz-art.html: tz-art.html
++check_tz-how-to.html: tz-how-to.html
++check_tz-link.html: tz-link.html
++check_theory.html check_tz-art.html check_tz-how-to.html check_tz-link.html:
++ $(CURL) -sS --url https://validator.w3.org/nu/ -F out=gnu \
++ -F file=@$$(expr $@ : 'check_\(.*\)') -o $@.out && \
++ test ! -s $@.out || { cat $@.out; exit 1; }
++ mv $@.out $@
++
++check_ziguard: rearguard.zi vanguard.zi ziguard.awk
++ $(AWK) -v DATAFORM=rearguard -f ziguard.awk vanguard.zi | \
++ diff -u rearguard.zi -
++ $(AWK) -v DATAFORM=vanguard -f ziguard.awk rearguard.zi | \
++ diff -u vanguard.zi -
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