[tz] [PATCH 0/1] Allow 'backzone' to be incorporated in 'right' data

Ian Abbott abbotti at mev.co.uk
Tue Sep 29 14:06:12 UTC 2015

On 28/09/15 22:53, Paul Eggert wrote:
> On 09/28/2015 11:01 AM, Ian Abbott wrote:
>> Would something along the lines of the attached Makefile be suitable?
>> It uses a single target to build one or two data sets
> It has just one target, but it has a large number of macros, and this
> number will grow exponentially with the number of options we add.  I'd
> rather have an approach where the Makefile doesn't grow exponentially
> with the number of options.

I think that would mean replacing the 'REDO' macro with separate macros 
to control whether the main set of data is 'posix' or 'right', whether 
the second (opposite) set of data is to be made available, and whether 
the 'backzone' data is to be incorporated.  Something along the lines of 
the attached Makefile?  (I can convert this to a patch if required, but 
want to see what you think first.)

One thing I'm not too sure of is the portability of macro expansions 
such as $(TZDIR_$(SET1)) which might make this a non-starter!

-=( Ian Abbott @ MEV Ltd.    E-mail: <abbotti at mev.co.uk> )=-
-=(                          Web: http://www.mev.co.uk/  )=-
-------------- next part --------------
# 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 numbers of the code and data distributions.
VERSION=	2015f

# Email address for bug reports.
BUGEMAIL=	tz at iana.org

# Change the line below for your time zone (after finding the zone you want in
# the time zone files, or adding it to a time zone file).
# Alternately, if you discover you've got the wrong time zone, you can just
#	zic -l rightzone
# to correct things.
# Use the command
#	make zonenames
# to get a list of the values you can use for LOCALTIME.


# If you want something other than Eastern United States time as a template
# for handling POSIX-style time zone environment variables,
# change the line below (after finding the zone you want in the
# time zone files, or adding it to a time zone file).
# (When a POSIX-style environment variable is handled, the rules in the
# template file are used to determine "spring forward" and "fall back" days and
# times; the environment variable itself specifies UT offsets of standard and
# summer time.)
# Alternately, if you discover you've got the wrong time zone, you can just
#	zic -p rightzone
# to correct things.
# Use the command
#	make zonenames
# to get a list of the values you can use for POSIXRULES.
# If you want POSIX compatibility, use "America/New_York".

POSIXRULES=	America/New_York

# Also see TZDEFRULESTRING below, which takes effect only
# if the time zone files cannot be accessed.

# Everything gets put in subdirectories of. . .

TOPDIR=		/usr/local

# "Compiled" time zone information is placed in the "TZDIR" directory
# (and subdirectories).
# Use an absolute path name for TZDIR unless you're just testing the software.


# Types to try, as an alternative to time_t.  int64_t should be first.
TIME_T_ALTERNATIVES= int64_t int32_t uint32_t uint64_t

# The "tzselect", "zic", and "zdump" commands get installed in. . .


# If you "make INSTALL", the "date" command gets installed in. . .


# Manual pages go in subdirectories of. . .


# Library functions are put in an archive in LIBDIR.


# If you always want time values interpreted as "seconds since the epoch
# (not counting leap seconds)", use
#	SET1=	posix
#	SET2=
# below.  If you always want right time values interpreted as "seconds since
# the epoch (counting leap seconds)", use
#	SET1=	right
#	SET2=
# below.  If you want both sets of data available, with leap seconds not
# counted normally, use
#	SET1=	posix
#	SET2=	right
# below.  If you want both sets of data available, with leap seconds counted
# normally, use
#	SET1=	right
#	SET2=	posix
# POSIX mandates that leap seconds not be counted; for compatibility with it,
# set 'SET1=posix'.
SET1=		posix
SET2=		right

# If you want to include out-of-scope and often wrong data from the file
# 'backzone', use
#	BACKZONE=	backzone
# below.  Otherwise, use
# below.

# Since "." may not be in PATH...

YEARISTYPE=	./yearistype

# Non-default libraries needed to link.
# Add -lintl if you want to use 'gettext' on Solaris.

# Add the following to the end of the "CFLAGS=" line as needed.
#  -DBIG_BANG=-9999999LL if the Big Bang occurred at time -9999999 (see zic.c)
#  -DHAVE_DOS_FILE_NAMES if file names have drive specifiers etc. (MS-DOS)
#  -DHAVE_GETTEXT=1 if 'gettext' works (GNU, Linux, Solaris); also see LDLIBS
#  -DHAVE_INCOMPATIBLE_CTIME_R=1 if your system's time.h declares
#	ctime_r and asctime_r incompatibly with the POSIX standard (Solaris 8).
#  -DHAVE_INTTYPES_H=1 if you have a pre-C99 compiler with "inttypes.h"
#  -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
#	This defaults to 1 if a working localtime_rz seems to be available.
#	localtime_rz can make zdump significantly faster, but is nonstandard.
#  -DHAVE_STDINT_H=1 if you have a pre-C99 compiler with "stdint.h"
#  -DHAVE_STRFTIME_L=1 if <time.h> declares locale_t and strftime_l
#	This defaults to 0 if _POSIX_VERSION < 200809, 1 otherwise.
#  -DHAVE_STRDUP=0 if your system lacks the strdup function
#  -DHAVE_SYMLINK=0 if your system lacks the symlink function
#  -DHAVE_SYS_STAT_H=0 if your compiler lacks a "sys/stat.h"
#  -DHAVE_SYS_WAIT_H=0 if your compiler lacks a "sys/wait.h"
#  -DHAVE_TZSET=0 if your system lacks a tzset function
#  -DHAVE_UNISTD_H=0 if your compiler lacks a "unistd.h" (Microsoft C++ 7?)
#	if you do not want run time warnings about formats that may cause
#	year 2000 grief
#  -Dssize_t=long on ancient hosts that lack ssize_t
#  -DTHREAD_SAFE=1 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
#  -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=1 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.
#	(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
GCC_DEBUG_FLAGS = -Dlint -g3 -O3 -fno-common -fstrict-aliasing \
	-Wall -Wextra \
	-Wbad-function-cast -Wcast-align -Wdate-time \
	-Wdeclaration-after-statement \
	-Wdouble-promotion \
	-Wformat=2 -Winit-self -Wjump-misses-init \
	-Wlogical-op -Wmissing-prototypes -Wnested-externs \
	-Wold-style-definition -Woverlength-strings -Wpointer-arith \
	-Wshadow -Wstrict-prototypes -Wsuggest-attribute=const \
	-Wsuggest-attribute=format -Wsuggest-attribute=noreturn \
	-Wsuggest-attribute=pure -Wtrampolines \
	-Wunused -Wwrite-strings \
	-Wno-address -Wno-format-nonliteral -Wno-sign-compare \
	-Wno-type-limits -Wno-unused-parameter
# If you want to use System V compatibility code, add
# to the end of the "CFLAGS=" line.  This arrange for "timezone" and "daylight"
# variables to be kept up-to-date by the time conversion functions.  Neither
# "timezone" nor "daylight" is described in X3J11's work.
# 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.  These two fields are not
# required by POSIX, but are widely available on GNU/Linux and BSD systems.
# If you want functions that were inspired by early versions of X3J11's work,
# add
# to the end of the "CFLAGS=" line.  This arranges for the functions
# "tzsetwall", "offtime", "timelocal", "timegm", "timeoff",
# "posix2time", and "time2posix" to be added to the time conversion library.
# "tzsetwall" is like "tzset" except that it arranges for local wall clock
# time (rather than the time specified in the TZ environment variable)
# to be used.
# "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".
# "timegm" is like "timelocal" except that it turns a struct tm into
# a time_t using UT (rather than local time as "timelocal" does).
# "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.
# Sun has provided "tzsetwall", "timelocal", and "timegm" in SunOS 4.0.
# 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
# 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 time zone.
# "tzalloc" allocates a timezone_t value, and "tzfree" frees it.
# If you want to allocate state structures in localtime, add
# to the end of the "CFLAGS=" line.  Storage is obtained by calling malloc.
# If you want an "altzone" variable (a la System V Release 3.1), add
# to the end of the "CFLAGS=" line.
# This variable is not described in X3J11's work.
# 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
# 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 those days in January that
# before the first Monday in January when a "%V" format is used and January 1
# falls on a Friday, Saturday, or Sunday.


# Linker flags.  Default to $(LFLAGS) for backwards compatibility
# to tzcode2012h and earlier.


zic=		./zic
ZIC=		$(zic) $(ZFLAGS)


# The name of a Posix-compliant 'awk' on your system.
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

# The path where SGML DTDs are kept and the catalog file(s) to use when
# validating.  The default is appropriate for Ubuntu 13.10.
SGML_DTDDIR= $(SGML_TOPDIR)/share/xml/w3c-sgml-lib/schema/dtd

# The name, arguments and environment of a program to validate your web pages.
# See <http://www.jclark.com/sp/> for a validator, and
# <http://validator.w3.org/source/> for a validation library.
VALIDATE = nsgmls
VALIDATE_FLAGS = -s -B -wall -wno-unused-param

# 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.
SAFE_CHARSET1=	$(TAB_CHAR)' !\"'$$sharp'$$%&'\''()*+,./0123456789:;<=>?@'
SAFE_CHARSET3=	'abcdefghijklmnopqrstuvwxyz{|}~'

# OK_CHAR matches any character allowed in the distributed files.
# This is the same as SAFE_CHAR, except that multibyte letters are
# also allowed so that commentary can contain people's names and quote
# non-English sources.  For non-letters the sources are limited to
# ASCII renderings for the convenience of maintainers whose text editors
# mishandle UTF-8 by default (e.g., XEmacs 21.4.22).
OK_CHAR=	'[][:alpha:]'$(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.
OK_LINE=	'^'$(OK_CHAR)'*$$'

# Flags to give 'tar' when making a distribution.
# Try to use flags appropriate for GNU tar.
GNUTARFLAGS=	--numeric-owner --owner=0 --group=0 --mode=go+u,go-w
TARFLAGS=	`if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; \
		 then echo $(GNUTARFLAGS); \
		 else :; \

# Flags to give 'gzip' when making a distribution.


#MAKE=		make

cc=		cc
CC=		$(cc) -DTZDIR=\"$(TZDIR)\"

AR=		ar

# ':' on typical hosts; 'ranlib' on the ancient hosts that still need ranlib.

TZCOBJS=	zic.o
TZDOBJS=	zdump.o localtime.o asctime.o
DATEOBJS=	date.o localtime.o strftime.o asctime.o
LIBSRCS=	localtime.c asctime.c difftime.c
LIBOBJS=	localtime.o asctime.o difftime.o
HEADERS=	tzfile.h private.h
NONLIBSRCS=	zic.c zdump.c
NEWUCBSRCS=	date.c strftime.c
			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 \
WEB_PAGES=	tz-art.htm tz-link.htm
PRIMARY_YDATA=	africa antarctica asia australasia \
		europe northamerica southamerica
YDATA=		$(PRIMARY_YDATA) pacificnew etcetera backward
NDATA=		systemv factory
ZONETABLES=	zone1970.tab zone.tab
TABDATA=	iso3166.tab leapseconds $(ZONETABLES)
LEAP_DEPS=	leapseconds.awk leap-seconds.list
DATA=		$(YDATA) $(NDATA) backzone $(TABDATA) \
			leap-seconds.list yearistype.sh
AWK_SCRIPTS=	checklinks.awk checktab.awk leapseconds.awk
MISC=		$(AWK_SCRIPTS) zoneinfo2tdf.pl

# 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

# 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.
TZDIR_posix=	$(TZDIR)-posix
TZDIR_right=	$(TZDIR)-leaps
# If SET2 is empty, value doesn't matter.

# The zic -L parameter...
LEAPS_posix=	/dev/null
LEAPS_right=	leapseconds
# If SET2 is empty, value doesn't matter.
LEAPS_=		/dev/null

ZONE_DEPS_right=	leapseconds

all:		tzselect zic zdump libtz.a $(TABDATA)

ALL:		all date $(ENCHILADA)

install:	all $(DATA) zones $(MANS)
		mkdir -p $(DESTDIR)$(ETCDIR) $(DESTDIR)$(TZDIR) \
			$(DESTDIR)$(MANDIR)/man3 $(DESTDIR)$(MANDIR)/man5 \
		$(ZIC) -y $(YEARISTYPE) \
		cp -f iso3166.tab $(ZONETABLES) $(DESTDIR)$(TZDIR)/.
		cp tzselect zic zdump $(DESTDIR)$(ETCDIR)/.
		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/.

		(echo 'static char const PKGVERSION[]="($(PACKAGE)) ";' && \
		 echo 'static char const TZVERSION[]="$(VERSION)";' && \
		 echo 'static char const REPORT_BUGS_TO[]="$(BUGEMAIL)";') >$@

zdump:		$(TZDOBJS)

zic:		$(TZCOBJS) yearistype

yearistype:	yearistype.sh
		cp yearistype.sh yearistype
		chmod +x yearistype

leapseconds:	$(LEAP_DEPS)
		$(AWK) -f leapseconds.awk leap-seconds.list >$@

zones:		$(ZONE_DEPS)
		rm -fr $(DESTDIR)$(TZDIR)
		$(ZIC) -y $(YEARISTYPE) -L $(LEAPS_$(SET1)) \
		  -d $(DESTDIR)$(TZDIR) $(TDATA)
		! test '$(BACKZONE)' || \
		  $(AWK) '/^Rule/' $(TDATA) | \
		    $(ZIC) -y $(YEARISTYPE) -L $(LEAPS_$(SET1)) \
		      -d $(DESTDIR)$(TZDIR) - $(BACKZONE)
		! test '$(SET2)' || { \
		  rm -fr $(DESTDIR)$(TZDIR_$(SET1)) ; \
		  ln -s $(TZDIR_BASENAME) $(DESTDIR)$(TZDIR_$(SET1)) || \
		    cp -R $(DESTDIR)$(TZDIR) $(DESTDIR)$(TZDIR_$(SET1)) ; }
		! test '$(SET2)' || { \
		  rm -fr $(DESTDIR)$(TZDIR_$(SET2)) ; \
		  $(ZIC) -y $(YEARISTYPE) -L $(LEAPS_$(SET2)) \
		    -d $(DESTDIR)$(TZDIR_$(SET2)) $(TDATA) ; }
		! test '$(SET2)' -a '$(BACKZONE)' || \
		  $(AWK) '/^Rule/' $(TDATA) | \
		    $(ZIC) -y $(YEARISTYPE) -L $(LEAPS_$(SET2)) \
		      -d $(DESTDIR)$(TZDIR_$(SET2)) - $(BACKZONE)

libtz.a:	$(LIBOBJS)
		$(AR) ru $@ $(LIBOBJS)
		$(RANLIB) $@

date:		$(DATEOBJS)

tzselect:	tzselect.ksh
		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=$(VERSION)|' \
			<$? >$@
		chmod +x $@

check:		check_character_set check_white_space check_links check_sorted \
		  check_tables check_web

check_character_set: $(ENCHILADA)
		LC_ALL=en_US.utf8 && export LC_ALL && \
		sharp='#' && \
		! grep -Env $(SAFE_LINE) Makefile $(MANS) date.1 $(MANTXTS) \
			$(MISC) $(SOURCES) $(WEB_PAGES) && \
		! grep -Env $(SAFE_SHARP_LINE) $(TDATA) backzone \
			leapseconds yearistype.sh zone.tab && \
		! grep -Env $(OK_LINE) $(ENCHILADA)

check_white_space: $(ENCHILADA)
		! grep -En ' '$(TAB_CHAR)"|$$(printf '[\f\r\v]')" $(ENCHILADA)
		! grep -n '[[:space:]]$$' $(ENCHILADA)

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/ {print $$3}' backward | LC_ALL=C sort -cu
		$(AWK) '/^Zone/ {print $$2}' backzone | LC_ALL=C sort -cu
		$(AWK) '/^[^#]/ {print $$1}' iso3166.tab | LC_ALL=C sort -cu
		$(AWK) '/^[^#]/ {print $$1}' zone.tab | LC_ALL=C sort -c
		$(AWK) '/^[^#]/ {print substr($$0, 1, 2)}' zone1970.tab | \
		  LC_ALL=C sort -c
		$(AWK) '/^[^#]/ $(CHECK_CC_LIST)' zone1970.tab | \
		  LC_ALL=C sort -cu

check_links:	checklinks.awk $(TDATA)
		$(AWK) -f checklinks.awk $(TDATA)

check_tables:	checktab.awk $(PRIMARY_YDATA) $(ZONETABLES)
		for tab in $(ZONETABLES); do \
		  $(AWK) -f checktab.awk -v zone_table=$$tab $(PRIMARY_YDATA) \
		    || exit; \

check_web:	$(WEB_PAGES)

		rm -f core *.o *.out \
		  date tzselect version.h zdump zic yearistype libtz.a
clean:		clean_misc
		rm -fr tzpublic

maintainer-clean: clean
		@echo 'This command is intended for maintainers to use; it'
		@echo 'deletes files that may need special tools to rebuild.'
		rm -f leapseconds $(MANTXTS) *.asc *.tar.gz

		@echo $(ENCHILADA)

public:		check check_public $(CHECK_TIME_T_ALTERNATIVES) \
		tarballs signatures

date.1.txt:	date.1
newctime.3.txt:	newctime.3
newstrftime.3.txt: newstrftime.3
newtzset.3.txt:	newtzset.3
time2posix.3.txt: time2posix.3
tzfile.5.txt:	tzfile.5
tzselect.8.txt:	tzselect.8
zdump.8.txt:	zdump.8
zic.8.txt:	zic.8

$(MANTXTS):	workman.sh
		LC_ALL=C sh workman.sh `expr $@ : '\(.*\)\.txt$$'` >$@

# Set the time stamps to those of the git repository, if available,
# and if the files have not changed since then.
# This uses GNU 'touch' syntax 'touch -d at N FILE',
# where N is the number of seconds since 1970.
# If git or GNU 'touch' is absent, don't bother to sync with git timestamps.
# Also, set the timestamp of each prebuilt file like 'leapseconds'
# to be the maximum of the files it depends on.
set-timestamps.out: $(ENCHILADA)
		rm -f $@
		if files=`git ls-files $(ENCHILADA)` && \
		   touch -md @1 test.out; then \
		  rm -f test.out && \
		  for file in $$files; do \
		    if git diff --quiet $$file; then \
		      time=`git log -1 --format='tformat:%ct' $$file` && \
		      touch -cmd @$$time $$file; \
		    else \
		      echo >&2 "$$file: warning: does not match repository"; \
		    fi || exit; \
		  done; \
		touch -cmr `ls -t $(LEAP_DEPS) | sed 1q` leapseconds
		for file in `ls $(MANTXTS) | sed 's/\.txt$$//'`; do \
		  touch -cmr `ls -t $$file workman.sh | sed 1q` $$file.txt || \
		    exit; \
		touch $@

# The zics below ensure that each data file can stand on its own.
# We also do an all-files run to catch links to links.

		$(MAKE) maintainer-clean
		mkdir tzpublic
		for i in $(TDATA) ; do \
		  $(zic) -v -d tzpublic $$i 2>&1 || exit; \
		$(zic) -v -d tzpublic $(TDATA)
		rm -fr tzpublic

# Check that the code works under various alternative
# implementations of time_t.
		if diff -q Makefile Makefile 2>/dev/null; then \
		  quiet_option='-q'; \
		else \
		  quiet_option=''; \
		fi && \
		zones=`$(AWK) '/^[^#]/ { print $$3 }' <zone1970.tab` && \
		for type in $(TIME_T_ALTERNATIVES); do \
		  mkdir -p tzpublic/$$type && \
		  $(MAKE) clean_misc && \
		  $(MAKE) TOPDIR=`pwd`/tzpublic/$$type \
		    CFLAGS='$(CFLAGS) -Dtime_tz='"'$$type'" \
		    SET1='$(SET1)' SET2='$(SET2)' BACKZONE='$(BACKZONE)' \
		    install && \
		  diff $$quiet_option -r \
		    tzpublic/int64_t/etc/zoneinfo \
		    tzpublic/$$type/etc/zoneinfo && \
		  case $$type in \
		  int32_t) range=-2147483648,2147483647;; \
		  uint32_t) range=0,4294967296;; \
		  int64_t) continue;; \
		  *u*) range=0,10000000000;; \
		  *) range=-10000000000,10000000000;; \
		  esac && \
		  echo checking $$type zones ... && \
		  tzpublic/int64_t/etc/zdump -V -t $$range $$zones \
		      >tzpublic/int64_t.out && \
		  tzpublic/$$type/etc/zdump -V -t $$range $$zones \
		      >tzpublic/$$type.out && \
		  diff -u tzpublic/int64_t.out tzpublic/$$type.out \
		    || exit; \
		rm -fr tzpublic

tarballs:	tzcode$(VERSION).tar.gz tzdata$(VERSION).tar.gz

tzcode$(VERSION).tar.gz: set-timestamps.out
		LC_ALL=C && export LC_ALL && \
		tar $(TARFLAGS) -cf - \
		    $(COMMON) $(DOCS) $(SOURCES) | \
		  gzip $(GZIPFLAGS) > $@

tzdata$(VERSION).tar.gz: set-timestamps.out
		LC_ALL=C && export LC_ALL && \
		tar $(TARFLAGS) -cf - $(COMMON) $(DATA) $(MISC) | \
		  gzip $(GZIPFLAGS) > $@

signatures:	tzcode$(VERSION).tar.gz.asc tzdata$(VERSION).tar.gz.asc

tzcode$(VERSION).tar.gz.asc: tzcode$(VERSION).tar.gz
		gpg --armor --detach-sign $?

tzdata$(VERSION).tar.gz.asc: tzdata$(VERSION).tar.gz
		gpg --armor --detach-sign $?

		$(MAKE) clean
		for i in "long long" unsigned; \
		do \
			$(MAKE) CFLAGS="-DTYPECHECK -D__time_t_defined -D_TIME_T \"-Dtime_t=$$i\"" ; \
			./zdump -v Europe/Rome ; \
			$(MAKE) clean ; \

zonenames:	$(TDATA)
		@$(AWK) '/^Zone/ { print $$2 } /^Link/ { print $$3 }' $(TDATA)

asctime.o:	private.h tzfile.h
date.o:		private.h
difftime.o:	private.h
localtime.o:	private.h tzfile.h
strftime.o:	private.h tzfile.h
zdump.o:	version.h
zic.o:		private.h tzfile.h version.h


.PHONY: check check_character_set check_links
.PHONY: check_public check_sorted check_tables
.PHONY: check_time_t_alternatives check_web check_white_space clean clean_misc
.PHONY: install maintainer-clean names public signatures tarballs typecheck
.PHONY: zonenames zones

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