Update timezone code from tzcode 2017b.

This patch updates files coming from tzcode to the versions in tzcode
2017b.  A couple of changes to other glibc code are needed.
time/tzset.c was using the SECSPERDAY macro from tzfile.h, which no
longer defines that macro, so a local definition is added to tzset.c.
Because timezone/private.h now defines the _ macro whenever
HAVE_GETTEXT is true, even if it was previously defined, it is also
necessary to avoid a conflict with the definition in
include/libintl.h.  Defining _ISOMAC is the obvious way to avoid such
internal definitions being visible, together with defining TZ_DOMAIN
so that zic and zdump continue to get the messages from the libc
domain as desired.  However, zic and zdump rely on PKGVERSION and
REPORT_BUGS_TO from config.h, which is not included by default with
_ISOMAC, so -include config.h needs adding to the options for these
programs as well.  Together those changes allow unmodified tzcode
2017b sources to work in glibc.

Tested for x86_64.

	* timezone/private.h: Update from tzcode 2017b.
	* timezone/tzfile.h: Likewise.
	* timezone/tzselect.ksh: Likewise.
	* timezone/zdump.c: Likewise.
	* timezone/zic.c: Likewise.
	* timezone/Makefile (tz-cflags): Add -D_ISOMAC
	-DTZ_DOMAIN='"libc"' -include $(common-objpfx)config.h.
	* time/tzset.c (SECSPERDAY): New macro.

1 files changed, 11 insertions, 0 deletions

diff --git a/ChangeLog b/ChangeLog
index 49c23b92f6..3581804a07 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,14 @@
+2017-06-16  Joseph Myers  <joseph@codesourcery.com>
+
+	* timezone/private.h: Update from tzcode 2017b.
+	* timezone/tzfile.h: Likewise.
+	* timezone/tzselect.ksh: Likewise.
+	* timezone/zdump.c: Likewise.
+	* timezone/zic.c: Likewise.
+	* timezone/Makefile (tz-cflags): Add -D_ISOMAC
+	-DTZ_DOMAIN='"libc"' -include $(common-objpfx)config.h.
+	* time/tzset.c (SECSPERDAY): New macro.
+
 2017-06-16  Rical Jasan  <ricaljasan@pacific.net>
 
 	* manual/string.texi (strdup): Complete header and standards