tzcode-native: update to 2017c

LICENSE changes do to rewording
https://github.com/eggert/tz/commit/7097a652778d35acf747d14f8bf7b3ced479bbc0#diff-9879d6db96fd29134fc802214163b95a

Backported to fixes from upstream too.

Changes to code

    zic and the reference runtime now reject multiple leap seconds
    within 28 days of each other, or leap seconds before the Epoch.
    As a result, support for double leap seconds, which was
    obsolescent and undocumented, has been removed.  Double leap
    seconds were an error in the C89 standard; they have never existed
    in civil timekeeping.  (Thanks to Robert Elz and Bradley White for
    noticing glitches in the code that uncovered this problem.)

    zic now warns about use of the obsolescent and undocumented -y
    option, and about use of the obsolescent TYPE field of Rule lines.

    zic now allows unambiguous abbreviations like "Sa" and "Su" for
    weekdays; formerly it rejected them due to a bug.  Conversely, zic
    no longer considers non-prefixes to be abbreviations; for example,
    it no longer accepts "lF" as an abbreviation for "lastFriday".
    Also, zic warns about the undocumented usage with a "last-"
    prefix, e.g., "last-Fri".

    Similarly, zic now accepts the unambiguous abbreviation "L" for
    "Link" in ordinary context and for "Leap" in leap-second context.
    Conversely, zic no longer accepts non-prefixes such as "La" as
    abbreviations for words like "Leap".

    zic no longer accepts leap second lines in ordinary input, or
    ordinary lines in leap second input.  Formerly, zic sometimes
    warned about this undocumented usage and handled it incorrectly.

    The new macro HAVE_TZNAME governs whether the tzname external
    variable is exported, instead of USG_COMPAT.  USG_COMPAT now
    governs only the external variables "timezone" and "daylight".
    This change is needed because the three variables are not in the
    same category: although POSIX requires tzname, it specifies the
    other two variables as optional.  Also, USG_COMPAT is now 1 or 0:
    if not defined, the code attempts to guess it from other macros.

    localtime.c and difftime.c no longer require stdio.h, and .c files
    other than zic.c no longer require sys/wait.h.

    zdump.c no longer assumes snprintf.  (Reported by Jonathan Leffler.)

    Calculation of time_t extrema works around a bug in GCC 4.8.4
    (Reported by Stan Shebs and Joseph Myers.)

    zic.c no longer mistranslates formats of line numbers in non-English
    locales.  (Problem reported by Benno Schulenberg.)

    Several minor changes have been made to the code to make it a
    bit easier to port to MS-Windows and Solaris.  (Thanks to Kees
    Dekker for reporting the problems.)

  Changes to documentation and commentary

    The two new files 'theory.html' and 'calendars' contain the
    contents of the removed file 'Theory'.  The goal is to document
    tzdb theory more accessibly.

    The zic man page now documents abbreviation rules.

    tz-link.htm now covers how to apply tzdata changes to clients.
    (Thanks to Jorge Fábregas for the AIX link.)  It also mentions MySQL.

    The leap-seconds.list URL has been updated to something that is
    more reliable for tzdb.  (Thanks to Tim Parenti and Brian Inglis.)

Signed-off-by: Armin Kuster <akuster808@gmail.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
(cherry picked from commit 74af497f8d6b4e28d97c0f2cdb4ece90c2a6b8b5)
Signed-off-by: Armin Kuster <akuster808@gmail.com>
(cherry picked from commit 12a538bbbc8d04e875f81bd65e9754d749273aac)

1 files changed, 115 insertions, 0 deletions

diff --git a/meta/recipes-extended/tzcode/files/0002-Port-zdump-to-C90-snprintf.patch b/meta/recipes-extended/tzcode/files/0002-Port-zdump-to-C90-snprintf.patch
new file mode 100644
index 0000000000..87afe47694
--- /dev/null
+++ b/meta/recipes-extended/tzcode/files/0002-Port-zdump-to-C90-snprintf.patch
@@ -0,0 +1,115 @@
+From e231da4fb2beb17c60b4b1a5c276366d6a6e433f Mon Sep 17 00:00:00 2001
+From: Paul Eggert <eggert@cs.ucla.edu>
+Date: Mon, 23 Oct 2017 17:58:36 -0700
+Subject: [PATCH] Port zdump to C90 + snprintf
+MIME-Version: 1.0
+Content-Type: text/plain; charset=UTF-8
+Content-Transfer-Encoding: 8bit
+
+Problem reported by Jon Skeet in:
+https://mm.icann.org/pipermail/tz/2017-October/025362.html
+* NEWS: Mention this.
+* zdump.c (my_snprintf): New macro or function.  If a macro, it is
+just snprintf.  If a function, it is the same as the old snprintf
+static function, with an ATTRIBUTE_FORMAT to pacify modern GCC.
+All uses of snprintf changed to use my_snprintf.  This way,
+installers don’t need to specify -DHAVE_SNPRINTF if they are using
+a pre-C99 compiler with a library that has snprintf.
+
+Upstream-Status: Backport
+Signed-off-by: Armin Kuster <akuster@mvista.com>
+
+---
+ NEWS    |  4 ++++
+ zdump.c | 29 ++++++++++++++++-------------
+ 2 files changed, 20 insertions(+), 13 deletions(-)
+
+diff --git a/NEWS b/NEWS
+index 75ab095..dea08b8 100644
+--- a/NEWS
++++ b/NEWS
+@@ -7,6 +7,10 @@ Unreleased, experimental changes
+     The Makefile now quotes values like BACKWARD more carefully when
+     passing them to the shell.  (Problem reported by Zefram.)
+ 
++    Builders no longer need to specify -DHAVE_SNPRINTF on platforms
++    that have snprintf and use pre-C99 compilers.  (Problem reported
++    by Jon Skeet.)
++
+ 
+ Release 2017c - 2017-10-20 14:49:34 -0700
+ 
+diff --git a/zdump.c b/zdump.c
+index 8e3bf3e..d4e6084 100644
+--- a/zdump.c
++++ b/zdump.c
+@@ -795,12 +795,14 @@ show(timezone_t tz, char *zone, time_t t, bool v)
+ 		abbrok(abbr(tmp), zone);
+ }
+ 
+-#if !HAVE_SNPRINTF
++#if HAVE_SNPRINTF
++# define my_snprintf snprintf
++#else
+ # include <stdarg.h>
+ 
+ /* A substitute for snprintf that is good enough for zdump.  */
+-static int
+-snprintf(char *s, size_t size, char const *format, ...)
++static int ATTRIBUTE_FORMAT((printf, 3, 4))
++my_snprintf(char *s, size_t size, char const *format, ...)
+ {
+   int n;
+   va_list args;
+@@ -839,10 +841,10 @@ format_local_time(char *buf, size_t size, struct tm const *tm)
+ {
+   int ss = tm->tm_sec, mm = tm->tm_min, hh = tm->tm_hour;
+   return (ss
+-	  ? snprintf(buf, size, "%02d:%02d:%02d", hh, mm, ss)
++	  ? my_snprintf(buf, size, "%02d:%02d:%02d", hh, mm, ss)
+ 	  : mm
+-	  ? snprintf(buf, size, "%02d:%02d", hh, mm)
+-	  : snprintf(buf, size, "%02d", hh));
++	  ? my_snprintf(buf, size, "%02d:%02d", hh, mm)
++	  : my_snprintf(buf, size, "%02d", hh));
+ }
+ 
+ /* Store into BUF, of size SIZE, a formatted UTC offset for the
+@@ -877,10 +879,10 @@ format_utc_offset(char *buf, size_t size, struct tm const *tm, time_t t)
+   mm = off / 60 % 60;
+   hh = off / 60 / 60;
+   return (ss || 100 <= hh
+-	  ? snprintf(buf, size, "%c%02ld%02d%02d", sign, hh, mm, ss)
++	  ? my_snprintf(buf, size, "%c%02ld%02d%02d", sign, hh, mm, ss)
+ 	  : mm
+-	  ? snprintf(buf, size, "%c%02ld%02d", sign, hh, mm)
+-	  : snprintf(buf, size, "%c%02ld", sign, hh));
++	  ? my_snprintf(buf, size, "%c%02ld%02d", sign, hh, mm)
++	  : my_snprintf(buf, size, "%c%02ld", sign, hh));
+ }
+ 
+ /* Store into BUF (of size SIZE) a quoted string representation of P.
+@@ -983,15 +985,16 @@ istrftime(char *buf, size_t size, char const *time_fmt,
+ 	    for (abp = ab; is_alpha(*abp); abp++)
+ 	      continue;
+ 	    len = (!*abp && *ab
+-		   ? snprintf(b, s, "%s", ab)
++		   ? my_snprintf(b, s, "%s", ab)
+ 		   : format_quoted_string(b, s, ab));
+ 	    if (s <= len)
+ 	      return false;
+ 	    b += len, s -= len;
+ 	  }
+-	  formatted_len = (tm->tm_isdst
+-			   ? snprintf(b, s, &"\t\t%d"[show_abbr], tm->tm_isdst)
+-			   : 0);
++	  formatted_len
++	    = (tm->tm_isdst
++	       ? my_snprintf(b, s, &"\t\t%d"[show_abbr], tm->tm_isdst)
++	       : 0);
+ 	}
+ 	break;
+       }
+-- 
+2.7.4
+