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Makefile revision 1.49
      1 # Make and install tzdb code and data.
      2 
      3 # This file is in the public domain, so clarified as of
      4 # 2009-05-17 by Arthur David Olson.
      5 
      6 # Package name for the code distribution.
      7 PACKAGE=	tzcode
      8 
      9 # Version number for the distribution, overridden in the 'tarballs' rule below.
     10 VERSION=	unknown
     11 
     12 # Email address for bug reports.
     13 BUGEMAIL=	tz@iana.org
     14 
     15 # DATAFORM selects the data format.
     16 # Available formats represent essentially the same data, albeit
     17 # possibly with minor discrepancies that users are not likely to notice.
     18 # To get new features and the best data right away, use:
     19 #	DATAFORM=	vanguard
     20 # To wait a while before using new features, to give downstream users
     21 # time to upgrade zic (the default), use:
     22 #	DATAFORM=	main
     23 # To wait even longer for new features, use:
     24 #	DATAFORM=	rearguard
     25 # Rearguard users might also want "ZFLAGS = -b fat"; see below.
     26 DATAFORM=		main
     27 
     28 # Change the line below for your timezone (after finding the one you want in
     29 # one of the $(TDATA) source files, or adding it to a source file).
     30 # Alternatively, if you discover you've got the wrong timezone, you can just
     31 # 'zic -l -' to remove it, or 'zic -l rightzone' to change it.
     32 # Use the command
     33 #	make zonenames
     34 # to get a list of the values you can use for LOCALTIME.
     35 
     36 LOCALTIME=	GMT
     37 
     38 # The POSIXRULES macro controls interpretation of nonstandard and obsolete
     39 # POSIX-like TZ settings like TZ='EET-2EEST' that lack DST transition rules.
     40 # Such a setting uses the rules in a template file to determine
     41 # "spring forward" and "fall back" days and times; the environment
     42 # variable itself specifies UT offsets of standard and daylight saving time.
     43 #
     44 # If POSIXRULES is '-', no template is installed; this is the default.
     45 #
     46 # Any other value for POSIXRULES is obsolete and should not be relied on, as:
     47 # * It does not work correctly in popular implementations such as GNU/Linux.
     48 # * It does not work even in tzcode, except for historical timestamps
     49 #   that precede the last explicit transition in the POSIXRULES file.
     50 #   Hence it typically does not work for current and future timestamps.
     51 # In short, software should avoid ruleless settings like TZ='EET-2EEST'
     52 # and so should not depend on the value of POSIXRULES.
     53 #
     54 # If, despite the above, you want a template for handling these settings,
     55 # you can change the line below (after finding the timezone you want in the
     56 # one of the $(TDATA) source files, or adding it to a source file).
     57 # Alternatively, if you discover you've got the wrong timezone, you can just
     58 # 'zic -p -' to remove it, or 'zic -p rightzone' to change it.
     59 # Use the command
     60 #	make zonenames
     61 # to get a list of the values you can use for POSIXRULES.
     62 
     63 POSIXRULES=	-
     64 
     65 # Also see TZDEFRULESTRING below, which takes effect only
     66 # if the time zone files cannot be accessed.
     67 
     68 
     69 # Installation locations.
     70 #
     71 # The defaults are suitable for Debian, except that if REDO is
     72 # posix_right or right_posix then files that Debian puts under
     73 # /usr/share/zoneinfo/posix and /usr/share/zoneinfo/right are instead
     74 # put under /usr/share/zoneinfo-posix and /usr/share/zoneinfo-leaps,
     75 # respectively.  Problems with the Debian approach are discussed in
     76 # the commentary for the right_posix rule (below).
     77 
     78 # Destination directory, which can be used for staging.
     79 # 'make DESTDIR=/stage install' installs under /stage (e.g., to
     80 # /stage/etc/localtime instead of to /etc/localtime).  Files under
     81 # /stage are not intended to work as-is, but can be copied by hand to
     82 # the root directory later.  If DESTDIR is empty, 'make install' does
     83 # not stage, but installs directly into production locations.
     84 DESTDIR =
     85 
     86 # Everything is installed into subdirectories of TOPDIR, and used there.
     87 # TOPDIR should be empty (meaning the root directory),
     88 # or a directory name that does not end in "/".
     89 # TOPDIR should be empty or an absolute name unless you're just testing.
     90 TOPDIR =
     91 
     92 # The default local timezone is taken from the file TZDEFAULT.
     93 TZDEFAULT = $(TOPDIR)/etc/localtime
     94 
     95 # The subdirectory containing installed program and data files, and
     96 # likewise for installed files that can be shared among architectures.
     97 # These should be relative file names.
     98 USRDIR = usr
     99 USRSHAREDIR = $(USRDIR)/share
    100 
    101 # "Compiled" timezone information is placed in the "TZDIR" directory
    102 # (and subdirectories).
    103 # TZDIR_BASENAME should not contain "/" and should not be ".", ".." or empty.
    104 TZDIR_BASENAME=	zoneinfo
    105 TZDIR = $(TOPDIR)/$(USRSHAREDIR)/$(TZDIR_BASENAME)
    106 
    107 # The "tzselect" and (if you do "make INSTALL") "date" commands go in:
    108 BINDIR = $(TOPDIR)/$(USRDIR)/bin
    109 
    110 # The "zdump" command goes in:
    111 ZDUMPDIR = $(BINDIR)
    112 
    113 # The "zic" command goes in:
    114 ZICDIR = $(TOPDIR)/$(USRDIR)/sbin
    115 
    116 # Manual pages go in subdirectories of. . .
    117 MANDIR = $(TOPDIR)/$(USRSHAREDIR)/man
    118 
    119 # Library functions are put in an archive in LIBDIR.
    120 LIBDIR = $(TOPDIR)/$(USRDIR)/lib
    121 
    122 
    123 # Types to try, as an alternative to time_t.
    124 TIME_T_ALTERNATIVES = $(TIME_T_ALTERNATIVES_HEAD) $(TIME_T_ALTERNATIVES_TAIL)
    125 TIME_T_ALTERNATIVES_HEAD = int_least64_t
    126 TIME_T_ALTERNATIVES_TAIL = int_least32_t uint_least32_t uint_least64_t
    127 
    128 # What kind of TZif data files to generate.  (TZif is the binary time
    129 # zone data format that zic generates; see Internet RFC 8536.)
    130 # If you want only POSIX time, with time values interpreted as
    131 # seconds since the epoch (not counting leap seconds), use
    132 #	REDO=		posix_only
    133 # below.  If you want only "right" time, with values interpreted
    134 # as seconds since the epoch (counting leap seconds), use
    135 #	REDO=		right_only
    136 # below.  If you want both sets of data available, with leap seconds not
    137 # counted normally, use
    138 #	REDO=		posix_right
    139 # below.  If you want both sets of data available, with leap seconds counted
    140 # normally, use
    141 #	REDO=		right_posix
    142 # below.  POSIX mandates that leap seconds not be counted; for compatibility
    143 # with it, use "posix_only" or "posix_right".  Use POSIX time on systems with
    144 # leap smearing; this can work better than unsmeared "right" time with
    145 # applications that are not leap second aware, and is closer to unsmeared
    146 # "right" time than unsmeared POSIX time is (e.g., 0.5 vs 1.0 s max error).
    147 
    148 REDO=		posix_right
    149 
    150 # Whether to put an "Expires" line in the leapseconds file.
    151 # Use EXPIRES_LINE=1 to put the line in, 0 to omit it.
    152 # The EXPIRES_LINE value matters only if REDO's value contains "right".
    153 # If you change EXPIRES_LINE, remove the leapseconds file before running "make".
    154 # zic's support for the Expires line was introduced in tzdb 2020a,
    155 # and was modified in tzdb 2021b to generate version 4 TZif files.
    156 # EXPIRES_LINE defaults to 0 for now so that the leapseconds file
    157 # can be given to pre-2020a zic implementations and so that TZif files
    158 # built by newer zic implementations can be read by pre-2021b libraries.
    159 EXPIRES_LINE=	0
    160 
    161 # To install data in text form that has all the information of the TZif data,
    162 # (optionally incorporating leap second information), use
    163 #	TZDATA_TEXT=	tzdata.zi leapseconds
    164 # To install text data without leap second information (e.g., because
    165 # REDO='posix_only'), use
    166 #	TZDATA_TEXT=	tzdata.zi
    167 # To avoid installing text data, use
    168 #	TZDATA_TEXT=
    169 
    170 TZDATA_TEXT=	leapseconds tzdata.zi
    171 
    172 # For backward-compatibility links for old zone names, use
    173 #	BACKWARD=	backward
    174 # To omit these links, use
    175 #	BACKWARD=
    176 
    177 BACKWARD=	backward
    178 
    179 # If you want out-of-scope and often-wrong data from the file 'backzone', use
    180 #	PACKRATDATA=	backzone
    181 # To omit this data, use
    182 #	PACKRATDATA=
    183 
    184 PACKRATDATA=
    185 
    186 # The name of a locale using the UTF-8 encoding, used during self-tests.
    187 # The tests are skipped if the name does not appear to work on this system.
    188 
    189 UTF8_LOCALE=	en_US.utf8
    190 
    191 # Non-default libraries needed to link.
    192 LDLIBS=
    193 
    194 # Add the following to the end of the "CFLAGS=" line as needed to override
    195 # defaults specified in the source code.  "-DFOO" is equivalent to "-DFOO=1".
    196 #  -DDEPRECATE_TWO_DIGIT_YEARS for optional runtime warnings about strftime
    197 #	formats that generate only the last two digits of year numbers
    198 #  -DEPOCH_LOCAL if the 'time' function returns local time not UT
    199 #  -DEPOCH_OFFSET=N if the 'time' function returns a value N greater
    200 #	than what POSIX specifies, assuming local time is UT.
    201 #	For example, N is 252460800 on AmigaOS.
    202 #  -DHAVE_DECL_ASCTIME_R=0 if <time.h> does not declare asctime_r
    203 #  -DHAVE_DECL_ENVIRON if <unistd.h> declares 'environ'
    204 #  -DHAVE_DIRECT_H if mkdir needs <direct.h> (MS-Windows)
    205 #  -DHAVE_GENERIC=0 if _Generic does not work
    206 #  -DHAVE_GETTEXT if 'gettext' works (e.g., GNU/Linux, FreeBSD, Solaris)
    207 #  -DHAVE_INCOMPATIBLE_CTIME_R if your system's time.h declares
    208 #	ctime_r and asctime_r incompatibly with the POSIX standard
    209 #	(Solaris when _POSIX_PTHREAD_SEMANTICS is not defined).
    210 #  -DHAVE_INTTYPES_H if you have a non-C99 compiler with <inttypes.h>
    211 #  -DHAVE_LINK=0 if your system lacks a link function
    212 #  -DHAVE_LOCALTIME_R=0 if your system lacks a localtime_r function
    213 #  -DHAVE_LOCALTIME_RZ=0 if you do not want zdump to use localtime_rz
    214 #	localtime_rz can make zdump significantly faster, but is nonstandard.
    215 #  -DHAVE_MALLOC_ERRNO=0 if malloc etc. do not set errno on failure.
    216 #  -DHAVE_POSIX_DECLS=0 if your system's include files do not declare
    217 #	functions like 'link' or variables like 'tzname' required by POSIX
    218 #  -DHAVE_SNPRINTF=0 if your system lacks the snprintf function
    219 #  -DHAVE_STDBOOL_H if you have a non-C99 compiler with <stdbool.h>
    220 #  -DHAVE_STDINT_H if you have a non-C99 compiler with <stdint.h>
    221 #  -DHAVE_STRFTIME_L if <time.h> declares locale_t and strftime_l
    222 #  -DHAVE_STRDUP=0 if your system lacks the strdup function
    223 #  -DHAVE_STRTOLL=0 if your system lacks the strtoll function
    224 #  -DHAVE_SYMLINK=0 if your system lacks the symlink function
    225 #  -DHAVE_SYS_STAT_H=0 if your compiler lacks a <sys/stat.h>
    226 #  -DHAVE_TZSET=0 if your system lacks a tzset function
    227 #  -DHAVE_UNISTD_H=0 if your compiler lacks a <unistd.h>
    228 #  -Dlocale_t=XXX if your system uses XXX instead of locale_t
    229 #  -DRESERVE_STD_EXT_IDS if your platform reserves standard identifiers
    230 #	with external linkage, e.g., applications cannot define 'localtime'.
    231 #  -Dssize_t=long on hosts like MS-Windows that lack ssize_t
    232 #  -DSUPPRESS_TZDIR to not prepend TZDIR to file names; this has
    233 #	security implications and is not recommended for general use
    234 #  -DTHREAD_SAFE to make localtime.c thread-safe, as POSIX requires;
    235 #	not needed by the main-program tz code, which is single-threaded.
    236 #	Append other compiler flags as needed, e.g., -pthread on GNU/Linux.
    237 #  -Dtime_tz=\"T\" to use T as the time_t type, rather than the system time_t
    238 #	This is intended for internal use only; it mangles external names.
    239 #  -DTZ_DOMAIN=\"foo\" to use "foo" for gettext domain name; default is "tz"
    240 #  -DTZ_DOMAINDIR=\"/path\" to use "/path" for gettext directory;
    241 #	the default is system-supplied, typically "/usr/lib/locale"
    242 #  -DTZDEFRULESTRING=\",date/time,date/time\" to default to the specified
    243 #	DST transitions if the time zone files cannot be accessed
    244 #  -DUNINIT_TRAP if reading uninitialized storage can cause problems
    245 #	other than simply getting garbage data
    246 #  -DUSE_LTZ=0 to build zdump with the system time zone library
    247 #	Also set TZDOBJS=zdump.o and CHECK_TIME_T_ALTERNATIVES= below.
    248 #  -DZIC_BLOAT_DEFAULT=\"fat\" to default zic's -b option to "fat", and
    249 #	similarly for "slim".  Fat TZif files work around incompatibilities
    250 #	and bugs in some TZif readers, notably readers that mishandle 64-bit
    251 #	data in TZif files.  Slim TZif files are more efficient and do not
    252 #	work around these incompatibilities and bugs.  If not given, the
    253 #	default is "slim".
    254 #  -DZIC_MAX_ABBR_LEN_WO_WARN=3
    255 #	(or some other number) to set the maximum time zone abbreviation length
    256 #	that zic will accept without a warning (the default is 6)
    257 #  $(GCC_DEBUG_FLAGS) if you are using recent GCC and want lots of checking
    258 # Select instrumentation via "make GCC_INSTRUMENT='whatever'".
    259 GCC_INSTRUMENT = \
    260   -fsanitize=undefined -fsanitize-address-use-after-scope \
    261   -fsanitize-undefined-trap-on-error -fstack-protector
    262 # Omit -fanalyzer from GCC_DEBUG_FLAGS, as it makes GCC too slow.
    263 GCC_DEBUG_FLAGS = -DGCC_LINT -g3 -O3 -fno-common \
    264   $(GCC_INSTRUMENT) \
    265   -Wall -Wextra \
    266   -Walloc-size-larger-than=100000 -Warray-bounds=2 \
    267   -Wbad-function-cast -Wcast-align=strict -Wdate-time \
    268   -Wdeclaration-after-statement -Wdouble-promotion \
    269   -Wduplicated-branches -Wduplicated-cond \
    270   -Wformat=2 -Wformat-overflow=2 -Wformat-signedness -Wformat-truncation \
    271   -Winit-self -Wlogical-op \
    272   -Wmissing-declarations -Wmissing-prototypes -Wnested-externs \
    273   -Wnull-dereference \
    274   -Wold-style-definition -Woverlength-strings -Wpointer-arith \
    275   -Wshadow -Wshift-overflow=2 -Wstrict-overflow \
    276   -Wstrict-prototypes -Wstringop-overflow=4 \
    277   -Wstringop-truncation -Wsuggest-attribute=cold \
    278   -Wsuggest-attribute=const -Wsuggest-attribute=format \
    279   -Wsuggest-attribute=malloc \
    280   -Wsuggest-attribute=noreturn -Wsuggest-attribute=pure \
    281   -Wtrampolines -Wundef -Wuninitialized -Wunused-macros \
    282   -Wvariadic-macros -Wvla -Wwrite-strings \
    283   -Wno-address -Wno-format-nonliteral -Wno-sign-compare \
    284   -Wno-type-limits -Wno-unused-parameter
    285 #
    286 # If your system has a "GMT offset" field in its "struct tm"s
    287 # (or if you decide to add such a field in your system's "time.h" file),
    288 # add the name to a define such as
    289 #	-DTM_GMTOFF=tm_gmtoff
    290 # to the end of the "CFLAGS=" line.  If not defined, the code attempts to
    291 # guess TM_GMTOFF from other macros; define NO_TM_GMTOFF to suppress this.
    292 # Similarly, if your system has a "zone abbreviation" field, define
    293 #	-DTM_ZONE=tm_zone
    294 # and define NO_TM_ZONE to suppress any guessing.  These two fields are not
    295 # required by POSIX, but are widely available on GNU/Linux and BSD systems.
    296 #
    297 # The next batch of options control support for external variables
    298 # exported by tzcode.  In practice these variables are less useful
    299 # than TM_GMTOFF and TM_ZONE.  However, most of them are standardized.
    300 # #
    301 # # To omit or support the external variable "tzname", add one of:
    302 # #	-DHAVE_TZNAME=0 # do not support "tzname"
    303 # #	-DHAVE_TZNAME=1 # support "tzname", which is defined by system library
    304 # #	-DHAVE_TZNAME=2 # support and define "tzname"
    305 # # to the "CFLAGS=" line.  "tzname" is required by POSIX 1988 and later.
    306 # # If not defined, the code attempts to guess HAVE_TZNAME from other macros.
    307 # # Warning: unless time_tz is also defined, HAVE_TZNAME=1 can cause
    308 # # crashes when combined with some platforms' standard libraries,
    309 # # presumably due to memory allocation issues.
    310 # #
    311 # # To omit or support the external variables "timezone" and "daylight", add
    312 # #	-DUSG_COMPAT=0 # do not support
    313 # #	-DUSG_COMPAT=1 # support, and variables are defined by system library
    314 # #	-DUSG_COMPAT=2 # support and define variables
    315 # # to the "CFLAGS=" line; "timezone" and "daylight" are inspired by
    316 # # Unix Systems Group code and are required by POSIX 2008 (with XSI) and later.
    317 # # If not defined, the code attempts to guess USG_COMPAT from other macros.
    318 # #
    319 # # To support the external variable "altzone", add
    320 # #	-DALTZONE=0 # do not support
    321 # #	-DALTZONE=1 # support "altzone", which is defined by system library
    322 # #	-DALTZONE=2 # support and define "altzone"
    323 # # to the end of the "CFLAGS=" line; although "altzone" appeared in
    324 # # System V Release 3.1 it has not been standardized.
    325 # # If not defined, the code attempts to guess ALTZONE from other macros.
    326 #
    327 # If you want functions that were inspired by early versions of X3J11's work,
    328 # add
    329 #	-DSTD_INSPIRED
    330 # to the end of the "CFLAGS=" line.  This arranges for the functions
    331 # "offtime", "timelocal", "timegm", "timeoff",
    332 # "posix2time", and "time2posix" to be added to the time conversion library.
    333 # "offtime" is like "gmtime" except that it accepts a second (long) argument
    334 # that gives an offset to add to the time_t when converting it.
    335 # "timelocal" is equivalent to "mktime".
    336 # "timegm" is like "timelocal" except that it turns a struct tm into
    337 # a time_t using UT (rather than local time as "timelocal" does).
    338 # "timeoff" is like "timegm" except that it accepts a second (long) argument
    339 # that gives an offset to use when converting to a time_t.
    340 # "posix2time" and "time2posix" are described in an included manual page.
    341 # X3J11's work does not describe any of these functions.
    342 # These functions may well disappear in future releases of the time
    343 # conversion package.
    344 #
    345 # If you don't want functions that were inspired by NetBSD, add
    346 #	-DNETBSD_INSPIRED=0
    347 # to the end of the "CFLAGS=" line.  Otherwise, the functions
    348 # "localtime_rz", "mktime_z", "tzalloc", and "tzfree" are added to the
    349 # time library, and if STD_INSPIRED is also defined the functions
    350 # "posix2time_z" and "time2posix_z" are added as well.
    351 # The functions ending in "_z" (or "_rz") are like their unsuffixed
    352 # (or suffixed-by-"_r") counterparts, except with an extra first
    353 # argument of opaque type timezone_t that specifies the timezone.
    354 # "tzalloc" allocates a timezone_t value, and "tzfree" frees it.
    355 #
    356 # If you want to allocate state structures in localtime, add
    357 #	-DALL_STATE
    358 # to the end of the "CFLAGS=" line.  Storage is obtained by calling malloc.
    359 #
    360 # NIST-PCTS:151-2, Version 1.4, (1993-12-03) is a test suite put
    361 # out by the National Institute of Standards and Technology
    362 # which claims to test C and Posix conformance.  If you want to pass PCTS, add
    363 #	-DPCTS
    364 # to the end of the "CFLAGS=" line.
    365 #
    366 # If you want strict compliance with XPG4 as of 1994-04-09, add
    367 #	-DXPG4_1994_04_09
    368 # to the end of the "CFLAGS=" line.  This causes "strftime" to always return
    369 # 53 as a week number (rather than 52 or 53) for January days before
    370 # January's first Monday when a "%V" format is used and January 1
    371 # falls on a Friday, Saturday, or Sunday.
    372 
    373 CFLAGS=
    374 
    375 # Linker flags.  Default to $(LFLAGS) for backwards compatibility
    376 # to release 2012h and earlier.
    377 
    378 LDFLAGS=	$(LFLAGS)
    379 
    380 # For leap seconds, this Makefile uses LEAPSECONDS='-L leapseconds' in
    381 # submake command lines.  The default is no leap seconds.
    382 
    383 LEAPSECONDS=
    384 
    385 # The zic command and its arguments.
    386 
    387 zic=		./zic
    388 ZIC=		$(zic) $(ZFLAGS)
    389 
    390 # To shrink the size of installed TZif files,
    391 # append "-r @N" to omit data before N-seconds-after-the-Epoch.
    392 # To grow the files and work around older application bugs, append "-b fat";
    393 # see ZIC_BLOAT_DEFAULT above.
    394 # See the zic man page for more about -b and -r.
    395 ZFLAGS=
    396 
    397 # How to use zic to install TZif files.
    398 
    399 ZIC_INSTALL=	$(ZIC) -d '$(DESTDIR)$(TZDIR)' $(LEAPSECONDS)
    400 
    401 # The name of a Posix-compliant 'awk' on your system.
    402 # Older 'mawk' versions, such as the 'mawk' in Ubuntu 16.04, might dump core;
    403 # on Ubuntu you can work around this with
    404 #	AWK=		gawk
    405 AWK=		awk
    406 
    407 # The full path name of a Posix-compliant shell, preferably one that supports
    408 # the Korn shell's 'select' statement as an extension.
    409 # These days, Bash is the most popular.
    410 # It should be OK to set this to /bin/sh, on platforms where /bin/sh
    411 # lacks 'select' or doesn't completely conform to Posix, but /bin/bash
    412 # is typically nicer if it works.
    413 KSHELL=		/bin/bash
    414 
    415 # Name of curl <https://curl.haxx.se/>, used for HTML validation.
    416 CURL=		curl
    417 
    418 # Name of GNU Privacy Guard <https://gnupg.org/>, used to sign distributions.
    419 GPG=		gpg
    420 
    421 # This expensive test requires USE_LTZ.
    422 # To suppress it, define this macro to be empty.
    423 CHECK_TIME_T_ALTERNATIVES = check_time_t_alternatives
    424 
    425 # SAFE_CHAR is a regular expression that matches a safe character.
    426 # Some parts of this distribution are limited to safe characters;
    427 # others can use any UTF-8 character.
    428 # For now, the safe characters are a safe subset of ASCII.
    429 # The caller must set the shell variable 'sharp' to the character '#',
    430 # since Makefile macros cannot contain '#'.
    431 # TAB_CHAR is a single tab character, in single quotes.
    432 TAB_CHAR=	'	'
    433 SAFE_CHARSET1=	$(TAB_CHAR)' !\"'$$sharp'$$%&'\''()*+,./0123456789:;<=>?@'
    434 SAFE_CHARSET2=	'ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\^_`'
    435 SAFE_CHARSET3=	'abcdefghijklmnopqrstuvwxyz{|}~'
    436 SAFE_CHARSET=	$(SAFE_CHARSET1)$(SAFE_CHARSET2)$(SAFE_CHARSET3)
    437 SAFE_CHAR=	'[]'$(SAFE_CHARSET)'-]'
    438 
    439 # These characters are Latin-1, and so are likely to be displayable
    440 # even in editors with limited character sets.
    441 UNUSUAL_OK_LATIN_1 = 
    442 # This IPA symbol is represented in Unicode as the composition of
    443 # U+0075 and U+032F, and U+032F is not considered alphabetic by some
    444 # grep implementations that do not grok composition.
    445 UNUSUAL_OK_IPA = u
    446 # Non-ASCII non-letters that OK_CHAR allows, as these characters are
    447 # useful in commentary.
    448 UNUSUAL_OK_CHARSET= $(UNUSUAL_OK_LATIN_1)$(UNUSUAL_OK_IPA)
    449 
    450 # OK_CHAR matches any character allowed in the distributed files.
    451 # This is the same as SAFE_CHAR, except that UNUSUAL_OK_CHARSET and
    452 # multibyte letters are also allowed so that commentary can contain a
    453 # few safe symbols and people's names and can quote non-English sources.
    454 # Other non-letters are limited to ASCII renderings for the
    455 # convenience of maintainers using XEmacs 21.5.34, which by default
    456 # mishandles Unicode characters U+0100 and greater.
    457 OK_CHAR=	'[][:alpha:]$(UNUSUAL_OK_CHARSET)'$(SAFE_CHARSET)'-]'
    458 
    459 # SAFE_LINE matches a line of safe characters.
    460 # SAFE_SHARP_LINE is similar, except any OK character can follow '#';
    461 # this is so that comments can contain non-ASCII characters.
    462 # OK_LINE matches a line of OK characters.
    463 SAFE_LINE=	'^'$(SAFE_CHAR)'*$$'
    464 SAFE_SHARP_LINE='^'$(SAFE_CHAR)'*('$$sharp$(OK_CHAR)'*)?$$'
    465 OK_LINE=	'^'$(OK_CHAR)'*$$'
    466 
    467 # Flags to give 'tar' when making a distribution.
    468 # Try to use flags appropriate for GNU tar.
    469 GNUTARFLAGS= --numeric-owner --owner=0 --group=0 --mode=go+u,go-w --sort=name
    470 TARFLAGS=	`if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; \
    471 		 then echo $(GNUTARFLAGS); \
    472 		 else :; \
    473 		 fi`
    474 
    475 # Flags to give 'gzip' when making a distribution.
    476 GZIPFLAGS=	-9n
    477 
    478 ###############################################################################
    479 
    480 #MAKE=		make
    481 
    482 cc=		cc
    483 CC=		$(cc) -DTZDIR='"$(TZDIR)"'
    484 
    485 AR=		ar
    486 
    487 # ':' on typical hosts; 'ranlib' on the ancient hosts that still need ranlib.
    488 RANLIB=		:
    489 
    490 TZCOBJS=	zic.o
    491 TZDOBJS=	zdump.o localtime.o asctime.o strftime.o
    492 DATEOBJS=	date.o localtime.o strftime.o asctime.o
    493 LIBSRCS=	localtime.c asctime.c difftime.c strftime.c
    494 LIBOBJS=	localtime.o asctime.o difftime.o strftime.o
    495 HEADERS=	tzfile.h private.h
    496 NONLIBSRCS=	zic.c zdump.c
    497 NEWUCBSRCS=	date.c
    498 SOURCES=	$(HEADERS) $(LIBSRCS) $(NONLIBSRCS) $(NEWUCBSRCS) \
    499 			tzselect.ksh workman.sh
    500 MANS=		newctime.3 newstrftime.3 newtzset.3 time2posix.3 \
    501 			tzfile.5 tzselect.8 zic.8 zdump.8
    502 MANTXTS=	newctime.3.txt newstrftime.3.txt newtzset.3.txt \
    503 			time2posix.3.txt \
    504 			tzfile.5.txt tzselect.8.txt zic.8.txt zdump.8.txt \
    505 			date.1.txt
    506 COMMON=		calendars CONTRIBUTING LICENSE Makefile \
    507 			NEWS README SECURITY theory.html version
    508 WEB_PAGES=	tz-art.html tz-how-to.html tz-link.html
    509 CHECK_WEB_PAGES=check_theory.html check_tz-art.html \
    510 			check_tz-how-to.html check_tz-link.html
    511 DOCS=		$(MANS) date.1 $(MANTXTS) $(WEB_PAGES)
    512 PRIMARY_YDATA=	africa antarctica asia australasia \
    513 		europe northamerica southamerica
    514 YDATA=		$(PRIMARY_YDATA) etcetera
    515 NDATA=		factory
    516 TDATA_TO_CHECK=	$(YDATA) $(NDATA) backward
    517 TDATA=		$(YDATA) $(NDATA) $(BACKWARD)
    518 ZONETABLES=	zone1970.tab zone.tab
    519 TABDATA=	iso3166.tab $(TZDATA_TEXT) $(ZONETABLES)
    520 LEAP_DEPS=	leapseconds.awk leap-seconds.list
    521 TZDATA_ZI_DEPS=	ziguard.awk zishrink.awk version $(TDATA) $(PACKRATDATA)
    522 DSTDATA_ZI_DEPS= ziguard.awk $(TDATA) $(PACKRATDATA)
    523 DATA=		$(TDATA_TO_CHECK) backzone iso3166.tab leap-seconds.list \
    524 			leapseconds $(ZONETABLES)
    525 AWK_SCRIPTS=	checklinks.awk checktab.awk leapseconds.awk \
    526 			ziguard.awk zishrink.awk
    527 MISC=		$(AWK_SCRIPTS) zoneinfo2tdf.pl
    528 TZS_YEAR=	2050
    529 TZS_CUTOFF_FLAG=	-c $(TZS_YEAR)
    530 TZS=		to$(TZS_YEAR).tzs
    531 TZS_NEW=	to$(TZS_YEAR)new.tzs
    532 TZS_DEPS=	$(YDATA) asctime.c localtime.c \
    533 			private.h tzfile.h zdump.c zic.c
    534 # EIGHT_YARDS is just a yard short of the whole ENCHILADA.
    535 EIGHT_YARDS = $(COMMON) $(DOCS) $(SOURCES) $(DATA) $(MISC) tzdata.zi
    536 ENCHILADA = $(EIGHT_YARDS) $(TZS)
    537 
    538 # Consult these files when deciding whether to rebuild the 'version' file.
    539 # This list is not the same as the output of 'git ls-files', since
    540 # .gitignore is not distributed.
    541 VERSION_DEPS= \
    542 		calendars CONTRIBUTING LICENSE Makefile NEWS README SECURITY \
    543 		africa antarctica asctime.c asia australasia \
    544 		backward backzone \
    545 		checklinks.awk checktab.awk \
    546 		date.1 date.c difftime.c \
    547 		etcetera europe factory iso3166.tab \
    548 		leap-seconds.list leapseconds.awk localtime.c \
    549 		newctime.3 newstrftime.3 newtzset.3 northamerica \
    550 		private.h southamerica strftime.c theory.html \
    551 		time2posix.3 tz-art.html tz-how-to.html tz-link.html \
    552 		tzfile.5 tzfile.h tzselect.8 tzselect.ksh \
    553 		workman.sh zdump.8 zdump.c zic.8 zic.c \
    554 		ziguard.awk zishrink.awk \
    555 		zone.tab zone1970.tab zoneinfo2tdf.pl
    556 
    557 # And for the benefit of csh users on systems that assume the user
    558 # shell should be used to handle commands in Makefiles. . .
    559 
    560 SHELL=		/bin/sh
    561 
    562 all:		tzselect zic zdump libtz.a $(TABDATA) \
    563 		  vanguard.zi main.zi rearguard.zi
    564 
    565 ALL:		all date $(ENCHILADA)
    566 
    567 install:	all $(DATA) $(REDO) $(MANS)
    568 		mkdir -p '$(DESTDIR)$(BINDIR)' \
    569 			'$(DESTDIR)$(ZDUMPDIR)' '$(DESTDIR)$(ZICDIR)' \
    570 			'$(DESTDIR)$(LIBDIR)' \
    571 			'$(DESTDIR)$(MANDIR)/man3' '$(DESTDIR)$(MANDIR)/man5' \
    572 			'$(DESTDIR)$(MANDIR)/man8'
    573 		$(ZIC_INSTALL) -l $(LOCALTIME) \
    574 			`case '$(POSIXRULES)' in ?*) echo '-p';; esac \
    575 			` $(POSIXRULES) \
    576 			-t '$(DESTDIR)$(TZDEFAULT)'
    577 		cp -f $(TABDATA) '$(DESTDIR)$(TZDIR)/.'
    578 		cp tzselect '$(DESTDIR)$(BINDIR)/.'
    579 		cp zdump '$(DESTDIR)$(ZDUMPDIR)/.'
    580 		cp zic '$(DESTDIR)$(ZICDIR)/.'
    581 		cp libtz.a '$(DESTDIR)$(LIBDIR)/.'
    582 		$(RANLIB) '$(DESTDIR)$(LIBDIR)/libtz.a'
    583 		cp -f newctime.3 newtzset.3 '$(DESTDIR)$(MANDIR)/man3/.'
    584 		cp -f tzfile.5 '$(DESTDIR)$(MANDIR)/man5/.'
    585 		cp -f tzselect.8 zdump.8 zic.8 '$(DESTDIR)$(MANDIR)/man8/.'
    586 
    587 INSTALL:	ALL install date.1
    588 		mkdir -p '$(DESTDIR)$(BINDIR)' '$(DESTDIR)$(MANDIR)/man1'
    589 		cp date '$(DESTDIR)$(BINDIR)/.'
    590 		cp -f date.1 '$(DESTDIR)$(MANDIR)/man1/.'
    591 
    592 # Calculate version number from git, if available.
    593 # Otherwise, use $(VERSION) unless it is "unknown" and there is already
    594 # a 'version' file, in which case reuse the existing 'version' contents
    595 # and append "-dirty" if the contents do not already end in "-dirty".
    596 version:	$(VERSION_DEPS)
    597 		{ (type git) >/dev/null 2>&1 && \
    598 		  V=`git describe --match '[0-9][0-9][0-9][0-9][a-z]*' \
    599 				--abbrev=7 --dirty` || \
    600 		  if test '$(VERSION)' = unknown && V=`cat $@`; then \
    601 		    case $$V in *-dirty);; *) V=$$V-dirty;; esac; \
    602 		  else \
    603 		    V='$(VERSION)'; \
    604 		  fi; } && \
    605 		printf '%s\n' "$$V" >$@.out
    606 		mv $@.out $@
    607 
    608 # These files can be tailored by setting BACKWARD and PACKRATDATA.
    609 vanguard.zi main.zi rearguard.zi: $(DSTDATA_ZI_DEPS)
    610 		$(AWK) -v DATAFORM=`expr $@ : '\(.*\).zi'` -f ziguard.awk \
    611 		  $(TDATA) $(PACKRATDATA) >$@.out
    612 		mv $@.out $@
    613 # This file has a version comment that attempts to capture any tailoring
    614 # via BACKWARD, DATAFORM, PACKRATDATA, and REDO.
    615 tzdata.zi:	$(DATAFORM).zi version zishrink.awk
    616 		version=`sed 1q version` && \
    617 		  LC_ALL=C $(AWK) \
    618 		    -v dataform='$(DATAFORM)' \
    619 		    -v deps='$(DSTDATA_ZI_DEPS) zishrink.awk' \
    620 		    -v redo='$(REDO)' \
    621 		    -v version="$$version" \
    622 		    -f zishrink.awk \
    623 		    $(DATAFORM).zi >$@.out
    624 		mv $@.out $@
    625 
    626 version.h:	version
    627 		VERSION=`cat version` && printf '%s\n' \
    628 		  'static char const PKGVERSION[]="($(PACKAGE)) ";' \
    629 		  "static char const TZVERSION[]=\"$$VERSION\";" \
    630 		  'static char const REPORT_BUGS_TO[]="$(BUGEMAIL)";' \
    631 		  >$@.out
    632 		mv $@.out $@
    633 
    634 zdump:		$(TZDOBJS)
    635 		$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(TZDOBJS) $(LDLIBS)
    636 
    637 zic:		$(TZCOBJS)
    638 		$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(TZCOBJS) $(LDLIBS)
    639 
    640 leapseconds:	$(LEAP_DEPS)
    641 		$(AWK) -v EXPIRES_LINE=$(EXPIRES_LINE) \
    642 		  -f leapseconds.awk leap-seconds.list >$@.out
    643 		mv $@.out $@
    644 
    645 # Arguments to pass to submakes of install_data.
    646 # They can be overridden by later submake arguments.
    647 INSTALLARGS = \
    648  BACKWARD='$(BACKWARD)' \
    649  DESTDIR='$(DESTDIR)' \
    650  LEAPSECONDS='$(LEAPSECONDS)' \
    651  PACKRATDATA='$(PACKRATDATA)' \
    652  TZDEFAULT='$(TZDEFAULT)' \
    653  TZDIR='$(TZDIR)' \
    654  ZIC='$(ZIC)'
    655 
    656 INSTALL_DATA_DEPS = zic leapseconds tzdata.zi
    657 
    658 # 'make install_data' installs one set of TZif files.
    659 install_data: $(INSTALL_DATA_DEPS)
    660 		$(ZIC_INSTALL) tzdata.zi
    661 
    662 posix_only: $(INSTALL_DATA_DEPS)
    663 		$(MAKE) $(INSTALLARGS) LEAPSECONDS= install_data
    664 
    665 right_only: $(INSTALL_DATA_DEPS)
    666 		$(MAKE) $(INSTALLARGS) LEAPSECONDS='-L leapseconds' \
    667 			install_data
    668 
    669 # In earlier versions of this makefile, the other two directories were
    670 # subdirectories of $(TZDIR).  However, this led to configuration errors.
    671 # For example, with posix_right under the earlier scheme,
    672 # TZ='right/Australia/Adelaide' got you localtime with leap seconds,
    673 # but gmtime without leap seconds, which led to problems with applications
    674 # like sendmail that subtract gmtime from localtime.
    675 # Therefore, the other two directories are now siblings of $(TZDIR).
    676 # You must replace all of $(TZDIR) to switch from not using leap seconds
    677 # to using them, or vice versa.
    678 right_posix:	right_only
    679 		rm -fr '$(DESTDIR)$(TZDIR)-leaps'
    680 		ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-leaps' || \
    681 		  $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
    682 		$(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
    683 
    684 posix_right:	posix_only
    685 		rm -fr '$(DESTDIR)$(TZDIR)-posix'
    686 		ln -s '$(TZDIR_BASENAME)' '$(DESTDIR)$(TZDIR)-posix' || \
    687 		  $(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-posix' posix_only
    688 		$(MAKE) $(INSTALLARGS) TZDIR='$(TZDIR)-leaps' right_only
    689 
    690 # This obsolescent rule is present for backwards compatibility with
    691 # tz releases 2014g through 2015g.  It should go away eventually.
    692 posix_packrat: $(INSTALL_DATA_DEPS)
    693 		$(MAKE) $(INSTALLARGS) PACKRATDATA=backzone posix_only
    694 
    695 zones:		$(REDO)
    696 
    697 # dummy.zd is not a real file; it is mentioned here only so that the
    698 # top-level 'make' does not have a syntax error.
    699 ZDS = dummy.zd
    700 # Rule used only by submakes invoked by the $(TZS_NEW) rule.
    701 # It is separate so that GNU 'make -j' can run instances in parallel.
    702 $(ZDS): zdump
    703 		./zdump -i $(TZS_CUTOFF_FLAG) '$(wd)/'$$(expr $@ : '\(.*\).zd') \
    704 		  >$@
    705 
    706 TZS_NEW_DEPS = tzdata.zi zdump zic
    707 $(TZS_NEW): $(TZS_NEW_DEPS)
    708 		rm -fr tzs$(TZS_YEAR).dir
    709 		mkdir tzs$(TZS_YEAR).dir
    710 		$(zic) -d tzs$(TZS_YEAR).dir tzdata.zi
    711 		$(AWK) '/^L/{print "Link\t" $$2 "\t" $$3}' \
    712 		   tzdata.zi | LC_ALL=C sort >$@.out
    713 		wd=`pwd` && \
    714 		x=`$(AWK) '/^Z/{print "tzs$(TZS_YEAR).dir/" $$2 ".zd"}' \
    715 				tzdata.zi \
    716 			| LC_ALL=C sort -t . -k 2,2` && \
    717 		set x $$x && \
    718 		shift && \
    719 		ZDS=$$* && \
    720 		$(MAKE) wd="$$wd" TZS_CUTOFF_FLAG="$(TZS_CUTOFF_FLAG)" \
    721 		  ZDS="$$ZDS" $$ZDS && \
    722 		sed 's,^TZ=".*\.dir/,TZ=",' $$ZDS >>$@.out
    723 		rm -fr tzs$(TZS_YEAR).dir
    724 		mv $@.out $@
    725 
    726 # If $(TZS) exists but 'make check_tzs' fails, a maintainer should inspect the
    727 # failed output and fix the inconsistency, perhaps by running 'make force_tzs'.
    728 $(TZS):
    729 		touch $@
    730 
    731 force_tzs:	$(TZS_NEW)
    732 		cp $(TZS_NEW) $(TZS)
    733 
    734 libtz.a:	$(LIBOBJS)
    735 		rm -f $@
    736 		$(AR) -rc $@ $(LIBOBJS)
    737 		$(RANLIB) $@
    738 
    739 date:		$(DATEOBJS)
    740 		$(CC) -o $@ $(CFLAGS) $(LDFLAGS) $(DATEOBJS) $(LDLIBS)
    741 
    742 tzselect:	tzselect.ksh version
    743 		VERSION=`cat version` && sed \
    744 			-e 's|#!/bin/bash|#!$(KSHELL)|g' \
    745 			-e 's|AWK=[^}]*|AWK=$(AWK)|g' \
    746 			-e 's|\(PKGVERSION\)=.*|\1='\''($(PACKAGE)) '\''|' \
    747 			-e 's|\(REPORT_BUGS_TO\)=.*|\1=$(BUGEMAIL)|' \
    748 			-e 's|TZDIR=[^}]*|TZDIR=$(TZDIR)|' \
    749 			-e 's|\(TZVERSION\)=.*|\1='"$$VERSION"'|' \
    750 			<$@.ksh >$@.out
    751 		chmod +x $@.out
    752 		mv $@.out $@
    753 
    754 check:		check_character_set check_white_space check_links \
    755 		  check_name_lengths check_sorted \
    756 		  check_tables check_web check_zishrink check_tzs
    757 
    758 check_character_set: $(ENCHILADA)
    759 	test ! '$(UTF8_LOCALE)' || \
    760 	! printf 'A\304\200B\n' | \
    761 	  LC_ALL='$(UTF8_LOCALE)' grep -q '^A.B$$' >/dev/null 2>&1 || { \
    762 		LC_ALL='$(UTF8_LOCALE)' && export LC_ALL && \
    763 		sharp='#' && \
    764 		! grep -Env $(SAFE_LINE) $(MANS) date.1 $(MANTXTS) \
    765 			$(MISC) $(SOURCES) $(WEB_PAGES) \
    766 			CONTRIBUTING LICENSE README SECURITY \
    767 			version tzdata.zi && \
    768 		! grep -Env $(SAFE_LINE)'|^UNUSUAL_OK_'$(OK_CHAR)'*$$' \
    769 			Makefile && \
    770 		! grep -Env $(SAFE_SHARP_LINE) $(TDATA_TO_CHECK) backzone \
    771 			leapseconds zone.tab && \
    772 		! grep -Env $(OK_LINE) $(ENCHILADA); \
    773 	}
    774 	touch $@
    775 
    776 check_white_space: $(ENCHILADA)
    777 		patfmt=' \t|[\f\r\v]' && pat=`printf "$$patfmt\\n"` && \
    778 		! grep -En "$$pat" \
    779 			$$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list)
    780 		! grep -n '[[:space:]]$$' \
    781 			$$(ls $(ENCHILADA) | grep -Fvx leap-seconds.list)
    782 		touch $@
    783 
    784 PRECEDES_FILE_NAME = ^(Zone|Link[[:space:]]+[^[:space:]]+)[[:space:]]+
    785 FILE_NAME_COMPONENT_TOO_LONG = \
    786   $(PRECEDES_FILE_NAME)[^[:space:]]*[^/[:space:]]{15}
    787 
    788 check_name_lengths: $(TDATA_TO_CHECK) backzone
    789 		! grep -En '$(FILE_NAME_COMPONENT_TOO_LONG)' \
    790 			$(TDATA_TO_CHECK) backzone
    791 		touch $@
    792 
    793 CHECK_CC_LIST = { n = split($$1,a,/,/); for (i=2; i<=n; i++) print a[1], a[i]; }
    794 
    795 check_sorted: backward backzone iso3166.tab zone.tab zone1970.tab
    796 		$(AWK) '/^Link/ {print $$3}' backward | LC_ALL=C sort -cu
    797 		$(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu
    798 		touch $@
    799 
    800 check_links:	checklinks.awk $(TDATA_TO_CHECK) tzdata.zi
    801 		$(AWK) -f checklinks.awk $(TDATA_TO_CHECK)
    802 		$(AWK) -f checklinks.awk tzdata.zi
    803 		touch $@
    804 
    805 check_tables:	checktab.awk $(YDATA) backward $(ZONETABLES)
    806 		for tab in $(ZONETABLES); do \
    807 		  test "$$tab" = zone.tab && links='$(BACKWARD)' || links=''; \
    808 		  $(AWK) -f checktab.awk -v zone_table=$$tab $(YDATA) $$links \
    809 		    || exit; \
    810 		done
    811 		touch $@
    812 
    813 check_tzs:	$(TZS) $(TZS_NEW)
    814 		if test -s $(TZS); then \
    815 		  diff -u $(TZS) $(TZS_NEW); \
    816 		else \
    817 		  cp $(TZS_NEW) $(TZS); \
    818 		fi
    819 		touch $@
    820 
    821 check_web:	$(CHECK_WEB_PAGES)
    822 check_theory.html: theory.html
    823 check_tz-art.html: tz-art.html
    824 check_tz-how-to.html: tz-how-to.html
    825 check_tz-link.html: tz-link.html
    826 check_theory.html check_tz-art.html check_tz-how-to.html check_tz-link.html:
    827 		$(CURL) -sS --url https://validator.w3.org/nu/ -F out=gnu \
    828 		    -F file=@$$(expr $@ : 'check_\(.*\)') -o $@.out && \
    829 		  test ! -s $@.out || { cat $@.out; exit 1; }
    830 		mv $@.out $@
    831 
    832 # Check that zishrink.awk does not alter the data, and that ziguard.awk
    833 # preserves main-format data.
    834 check_zishrink: check_zishrink_posix check_zishrink_right
    835 check_zishrink_posix check_zishrink_right: \
    836   zic leapseconds $(PACKRATDATA) $(TDATA) $(DATAFORM).zi tzdata.zi
    837 		rm -fr $@.dir $@-t.dir $@-shrunk.dir
    838 		mkdir $@.dir $@-t.dir $@-shrunk.dir
    839 		case $@ in \
    840 		  *_right) leap='-L leapseconds';; \
    841 		  *) leap=;; \
    842 		esac && \
    843 		  $(ZIC) $$leap -d $@.dir $(DATAFORM).zi && \
    844 		  $(ZIC) $$leap -d $@-shrunk.dir tzdata.zi && \
    845 		  case $(DATAFORM) in \
    846 		    main) \
    847 		      $(ZIC) $$leap -d $@-t.dir $(TDATA) && \
    848 		      $(AWK) '/^Rule/' $(TDATA) | \
    849 			$(ZIC) $$leap -d $@-t.dir - $(PACKRATDATA) && \
    850 		      diff -r $@.dir $@-t.dir;; \
    851 		  esac
    852 		diff -r $@.dir $@-shrunk.dir
    853 		rm -fr $@.dir $@-t.dir $@-shrunk.dir
    854 		touch $@
    855 
    856 clean_misc:
    857 		rm -fr check_*.dir
    858 		rm -f *.o *.out $(TIME_T_ALTERNATIVES) \
    859 		  check_* core typecheck_* \
    860 		  date tzselect version.h zdump zic libtz.a
    861 clean:		clean_misc
    862 		rm -fr *.dir tzdb-*/
    863 		rm -f *.zi $(TZS_NEW)
    864 
    865 maintainer-clean: clean
    866 		@echo 'This command is intended for maintainers to use; it'
    867 		@echo 'deletes files that may need special tools to rebuild.'
    868 		rm -f leapseconds version $(MANTXTS) $(TZS) *.asc *.tar.*
    869 
    870 names:
    871 		@echo $(ENCHILADA)
    872 
    873 public:		check check_public $(CHECK_TIME_T_ALTERNATIVES) \
    874 		tarballs signatures
    875 
    876 date.1.txt:	date.1
    877 newctime.3.txt:	newctime.3
    878 newstrftime.3.txt: newstrftime.3
    879 newtzset.3.txt:	newtzset.3
    880 time2posix.3.txt: time2posix.3
    881 tzfile.5.txt:	tzfile.5
    882 tzselect.8.txt:	tzselect.8
    883 zdump.8.txt:	zdump.8
    884 zic.8.txt:	zic.8
    885 
    886 $(MANTXTS):	workman.sh
    887 		LC_ALL=C sh workman.sh `expr $@ : '\(.*\)\.txt$$'` >$@.out
    888 		mv $@.out $@
    889 
    890 # Set file timestamps deterministically if possible,
    891 # so that tarballs containing the timestamps are reproducible.
    892 #
    893 # '$(SET_TIMESTAMP_N) N DEST A B C ...' sets the timestamp of the
    894 # file DEST to the maximum of the timestamps of the files A B C ...,
    895 # plus N if GNU ls and touch are available.
    896 SET_TIMESTAMP_N = sh -c '\
    897   n=$$0 dest=$$1; shift; \
    898   touch -cmr `ls -t "$$@" | sed 1q` "$$dest" && \
    899   if test $$n != 0 && \
    900      lsout=`ls -n --time-style="+%s" "$$dest" 2>/dev/null`; then \
    901     set x $$lsout && \
    902     touch -cmd @`expr $$7 + $$n` "$$dest"; \
    903   else :; fi'
    904 # If DEST depends on A B C ... in this Makefile, callers should use
    905 # $(SET_TIMESTAMP_DEP) DEST A B C ..., for the benefit of any
    906 # downstream 'make' that considers equal timestamps to be out of date.
    907 # POSIX allows this 'make' behavior, and HP-UX 'make' does it.
    908 # If all that matters is that the timestamp be reproducible
    909 # and plausible, use $(SET_TIMESTAMP).
    910 SET_TIMESTAMP = $(SET_TIMESTAMP_N) 0
    911 SET_TIMESTAMP_DEP = $(SET_TIMESTAMP_N) 1
    912 
    913 # Set the timestamps to those of the git repository, if available,
    914 # and if the files have not changed since then.
    915 # This uses GNU 'ls --time-style=+%s', which outputs the seconds count,
    916 # and GNU 'touch -d@N FILE', where N is the number of seconds since 1970.
    917 # If git or GNU is absent, don't bother to sync with git timestamps.
    918 # Also, set the timestamp of each prebuilt file like 'leapseconds'
    919 # to be the maximum of the files it depends on.
    920 set-timestamps.out: $(EIGHT_YARDS)
    921 		rm -f $@
    922 		if (type git) >/dev/null 2>&1 && \
    923 		   files=`git ls-files $(EIGHT_YARDS)` && \
    924 		   touch -md @1 test.out; then \
    925 		  rm -f test.out && \
    926 		  for file in $$files; do \
    927 		    if git diff --quiet $$file; then \
    928 		      time=`git log -1 --format='tformat:%ct' $$file` && \
    929 		      touch -cmd @$$time $$file; \
    930 		    else \
    931 		      echo >&2 "$$file: warning: does not match repository"; \
    932 		    fi || exit; \
    933 		  done; \
    934 		fi
    935 		$(SET_TIMESTAMP_DEP) leapseconds $(LEAP_DEPS)
    936 		for file in `ls $(MANTXTS) | sed 's/\.txt$$//'`; do \
    937 		  $(SET_TIMESTAMP_DEP) $$file.txt $$file workman.sh || \
    938 		    exit; \
    939 		done
    940 		$(SET_TIMESTAMP_DEP) version $(VERSION_DEPS)
    941 		$(SET_TIMESTAMP_DEP) tzdata.zi $(TZDATA_ZI_DEPS)
    942 		touch $@
    943 set-tzs-timestamp.out: $(TZS)
    944 		$(SET_TIMESTAMP_DEP) $(TZS) $(TZS_DEPS)
    945 		touch $@
    946 
    947 # The zics below ensure that each data file can stand on its own.
    948 # We also do an all-files run to catch links to links.
    949 
    950 check_public: $(VERSION_DEPS)
    951 		rm -fr public.dir
    952 		mkdir public.dir
    953 		ln $(VERSION_DEPS) public.dir
    954 		cd public.dir && $(MAKE) CFLAGS='$(GCC_DEBUG_FLAGS)' ALL
    955 		for i in $(TDATA_TO_CHECK) public.dir/tzdata.zi \
    956 		    public.dir/vanguard.zi public.dir/main.zi \
    957 		    public.dir/rearguard.zi; \
    958 		do \
    959 		  public.dir/zic -v -d public.dir/zoneinfo $$i 2>&1 || exit; \
    960 		done
    961 		public.dir/zic -v -d public.dir/zoneinfo-all $(TDATA_TO_CHECK)
    962 		:
    963 		: Also check 'backzone' syntax.
    964 		rm public.dir/main.zi
    965 		cd public.dir && $(MAKE) PACKRATDATA=backzone main.zi
    966 		public.dir/zic -d public.dir/zoneinfo main.zi
    967 		:
    968 		rm -fr public.dir
    969 		touch $@
    970 
    971 # Check that the code works under various alternative
    972 # implementations of time_t.
    973 check_time_t_alternatives: $(TIME_T_ALTERNATIVES)
    974 $(TIME_T_ALTERNATIVES_TAIL): $(TIME_T_ALTERNATIVES_HEAD)
    975 $(TIME_T_ALTERNATIVES): $(VERSION_DEPS)
    976 		rm -fr $@.dir
    977 		mkdir $@.dir
    978 		ln $(VERSION_DEPS) $@.dir
    979 		case $@ in \
    980 		  int*32_t) range=-2147483648,2147483648;; \
    981 		  u*) range=0,4294967296;; \
    982 		  *) range=-4294967296,4294967296;; \
    983 		esac && \
    984 		wd=`pwd` && \
    985 		zones=`$(AWK) '/^[^#]/ { print $$3 }' <zone1970.tab` && \
    986 		if test $@ = $(TIME_T_ALTERNATIVES_HEAD); then \
    987 		  range_target=; \
    988 		else \
    989 		  range_target=to$$range.tzs; \
    990 		fi && \
    991 		(cd $@.dir && \
    992 		  $(MAKE) TOPDIR="$$wd/$@.dir" \
    993 		    CFLAGS='$(CFLAGS) -Dtime_tz='"'$@'" \
    994 		    REDO='$(REDO)' \
    995 			D=$$wd/$@.dir \
    996 		    TZS_YEAR="$$range" TZS_CUTOFF_FLAG="-t $$range" \
    997 		    install $$range_target) && \
    998 		test $@ = $(TIME_T_ALTERNATIVES_HEAD) || { \
    999 		  (cd $(TIME_T_ALTERNATIVES_HEAD).dir && \
   1000 		    $(MAKE) TOPDIR="$$wd/$@.dir" \
   1001 		      TZS_YEAR="$$range" TZS_CUTOFF_FLAG="-t $$range" \
   1002 			D=$$wd/$@.dir \
   1003 		      to$$range.tzs) && \
   1004 		  diff -u $(TIME_T_ALTERNATIVES_HEAD).dir/to$$range.tzs \
   1005 			  $@.dir/to$$range.tzs && \
   1006 		  if diff -q Makefile Makefile 2>/dev/null; then \
   1007 		    quiet_option='-q'; \
   1008 		  else \
   1009 		    quiet_option=''; \
   1010 		  fi && \
   1011 		    diff $$quiet_option -r $(TIME_T_ALTERNATIVES_HEAD).dir/etc \
   1012 					   $@.dir/etc && \
   1013 		    diff $$quiet_option -r \
   1014 		      $(TIME_T_ALTERNATIVES_HEAD).dir/usr/share \
   1015 		      $@.dir/usr/share; \
   1016 		}
   1017 		touch $@
   1018 
   1019 TRADITIONAL_ASC = \
   1020   tzcode$(VERSION).tar.gz.asc \
   1021   tzdata$(VERSION).tar.gz.asc
   1022 REARGUARD_ASC = \
   1023   tzdata$(VERSION)-rearguard.tar.gz.asc
   1024 ALL_ASC = $(TRADITIONAL_ASC) $(REARGUARD_ASC) \
   1025   tzdb-$(VERSION).tar.lz.asc
   1026 
   1027 tarballs rearguard_tarballs traditional_tarballs \
   1028 signatures rearguard_signatures traditional_signatures: \
   1029   version set-timestamps.out rearguard.zi
   1030 		VERSION=`cat version` && \
   1031 		$(MAKE) AWK='$(AWK)' VERSION="$$VERSION" $@_version
   1032 
   1033 # These *_version rules are intended for use if VERSION is set by some
   1034 # other means.  Ordinarily these rules are used only by the above
   1035 # non-_version rules, which set VERSION on the 'make' command line.
   1036 tarballs_version: traditional_tarballs_version rearguard_tarballs_version \
   1037   tzdb-$(VERSION).tar.lz
   1038 rearguard_tarballs_version: \
   1039   tzdata$(VERSION)-rearguard.tar.gz
   1040 traditional_tarballs_version: \
   1041   tzcode$(VERSION).tar.gz tzdata$(VERSION).tar.gz
   1042 signatures_version: $(ALL_ASC)
   1043 rearguard_signatures_version: $(REARGUARD_ASC)
   1044 traditional_signatures_version: $(TRADITIONAL_ASC)
   1045 
   1046 tzcode$(VERSION).tar.gz: set-timestamps.out
   1047 		LC_ALL=C && export LC_ALL && \
   1048 		tar $(TARFLAGS) -cf - \
   1049 		    $(COMMON) $(DOCS) $(SOURCES) | \
   1050 		  gzip $(GZIPFLAGS) >$@.out
   1051 		mv $@.out $@
   1052 
   1053 tzdata$(VERSION).tar.gz: set-timestamps.out
   1054 		LC_ALL=C && export LC_ALL && \
   1055 		tar $(TARFLAGS) -cf - $(COMMON) $(DATA) $(MISC) | \
   1056 		  gzip $(GZIPFLAGS) >$@.out
   1057 		mv $@.out $@
   1058 
   1059 tzdata$(VERSION)-rearguard.tar.gz: rearguard.zi set-timestamps.out
   1060 		rm -fr tzdata$(VERSION)-rearguard.dir
   1061 		mkdir tzdata$(VERSION)-rearguard.dir
   1062 		ln $(COMMON) $(DATA) $(MISC) tzdata$(VERSION)-rearguard.dir
   1063 		cd tzdata$(VERSION)-rearguard.dir && \
   1064 		  rm -f $(TDATA) $(PACKRATDATA) version
   1065 		for f in $(TDATA) $(PACKRATDATA); do \
   1066 		  rearf=tzdata$(VERSION)-rearguard.dir/$$f; \
   1067 		  $(AWK) -v DATAFORM=rearguard -f ziguard.awk $$f >$$rearf && \
   1068 		  $(SET_TIMESTAMP_DEP) $$rearf ziguard.awk $$f || exit; \
   1069 		done
   1070 		sed '1s/$$/-rearguard/' \
   1071 		  <version >tzdata$(VERSION)-rearguard.dir/version
   1072 		: The dummy pacificnew pacifies TZUpdater 2.3.1 and earlier.
   1073 		TZ=UTC0 touch -mt 202010122253.00 \
   1074 		  tzdata$(VERSION)-rearguard.dir/pacificnew
   1075 		touch -cmr version tzdata$(VERSION)-rearguard.dir/version
   1076 		LC_ALL=C && export LC_ALL && \
   1077 		  (cd tzdata$(VERSION)-rearguard.dir && \
   1078 		   tar $(TARFLAGS) -cf - \
   1079 			$(COMMON) $(DATA) $(MISC) pacificnew | \
   1080 		     gzip $(GZIPFLAGS)) >$@.out
   1081 		mv $@.out $@
   1082 
   1083 tzdb-$(VERSION).tar.lz: set-timestamps.out set-tzs-timestamp.out
   1084 		rm -fr tzdb-$(VERSION)
   1085 		mkdir tzdb-$(VERSION)
   1086 		ln $(ENCHILADA) tzdb-$(VERSION)
   1087 		$(SET_TIMESTAMP) tzdb-$(VERSION) tzdb-$(VERSION)/*
   1088 		LC_ALL=C && export LC_ALL && \
   1089 		tar $(TARFLAGS) -cf - tzdb-$(VERSION) | lzip -9 >$@.out
   1090 		mv $@.out $@
   1091 
   1092 tzcode$(VERSION).tar.gz.asc: tzcode$(VERSION).tar.gz
   1093 tzdata$(VERSION).tar.gz.asc: tzdata$(VERSION).tar.gz
   1094 tzdata$(VERSION)-rearguard.tar.gz.asc: tzdata$(VERSION)-rearguard.tar.gz
   1095 tzdb-$(VERSION).tar.lz.asc: tzdb-$(VERSION).tar.lz
   1096 $(ALL_ASC):
   1097 		$(GPG) --armor --detach-sign $?
   1098 
   1099 TYPECHECK_CFLAGS = $(CFLAGS) -DTYPECHECK -D__time_t_defined -D_TIME_T
   1100 typecheck: typecheck_long_long typecheck_unsigned
   1101 typecheck_long_long typecheck_unsigned: $(VERSION_DEPS)
   1102 		rm -fr $@.dir
   1103 		mkdir $@.dir
   1104 		ln $(VERSION_DEPS) $@.dir
   1105 		cd $@.dir && \
   1106 		  case $@ in \
   1107 		    *_long_long) i="long long";; \
   1108 		    *_unsigned ) i="unsigned" ;; \
   1109 		  esac && \
   1110 		  typecheck_cflags='' && \
   1111 		  $(MAKE) \
   1112 		    CFLAGS="$(TYPECHECK_CFLAGS) \"-Dtime_t=$$i\"" \
   1113 		    TOPDIR="`pwd`" \
   1114 		    install
   1115 		$@.dir/zdump -i -c 1970,1971 Europe/Rome
   1116 		touch $@
   1117 
   1118 zonenames:	tzdata.zi
   1119 		@$(AWK) '/^Z/ { print $$2 } /^L/ { print $$3 }' tzdata.zi
   1120 
   1121 asctime.o:	private.h tzfile.h
   1122 date.o:		private.h
   1123 difftime.o:	private.h
   1124 localtime.o:	private.h tzfile.h
   1125 strftime.o:	private.h tzfile.h
   1126 zdump.o:	version.h
   1127 zic.o:		private.h tzfile.h version.h
   1128 
   1129 .PHONY: ALL INSTALL all
   1130 .PHONY: check check_time_t_alternatives
   1131 .PHONY: check_web check_zishrink
   1132 .PHONY: clean clean_misc dummy.zd force_tzs
   1133 .PHONY: install install_data maintainer-clean names
   1134 .PHONY: posix_only posix_packrat posix_right public
   1135 .PHONY: rearguard_signatures rearguard_signatures_version
   1136 .PHONY: rearguard_tarballs rearguard_tarballs_version
   1137 .PHONY: right_only right_posix signatures signatures_version
   1138 .PHONY: tarballs tarballs_version
   1139 .PHONY: traditional_signatures traditional_signatures_version
   1140 .PHONY: traditional_tarballs traditional_tarballs_version
   1141 .PHONY: typecheck
   1142 .PHONY: zonenames zones
   1143 .PHONY: $(ZDS)
   1144