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# The name of a POSIX-like library archiver, its flags, C compiler,
# linker flags, and 'make' utility.  Ordinarily the defaults suffice.
# The commented-out values are the defaults specified by POSIX.1-2024.
#AR = ar
#ARFLAGS = -rv
#CC = c17
#LDFLAGS =
#MAKE = make

# Where to fetch leap-seconds.list from.
leaplist_URI = \
  https://hpiers.obspm.fr/iers/bul/bulc/ntp/leap-seconds.list
# The file is generated by the IERS Earth Orientation Centre, in Paris.
leaplist_TZ = Europe/Paris
#
# To fetch leap-seconds.list from NIST via a less-secure protocol
# and with less-volatile metadata, use these settings:
#leaplist_URI = ftp://ftp.boulder.nist.gov/pub/time/leap-seconds.list
#leaplist_TZ = America/Denver

# 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)'

# 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
# and to fetch leap-seconds.list from upstream.
# Set CURL=: to disable use of the Internet.
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 non-alphabetic, non-ASCII printable characters are
# used in commentary or in generated *.txt files
# and are not likely to cause confusion.
UNUSUAL_OK_CHARSET= §«°±»½¾×–‘’“”•→−≤★⟨⟩⯪

# 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.
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
SETUP_TAR= \
  export LC_ALL=C && \
  if tar $(GNUTARFLAGS) --version >/dev/null 2>&1; then \
    TAR='tar $(GNUTARFLAGS)'; \
  else \
    TAR=tar; \
  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.
SETUP_DIFF_TZS = \