Update timezone code from tzcode 2015g.

This patch updates the timezone code from tzcode 2015g.  The Makefile
and README changes are based on those in Paul's patch
<https://sourceware.org/ml/libc-alpha/2015-05/msg00553.html>.

Tested for x86_64 and x86.

2016-01-06  Paul Eggert  <eggert@cs.ucla.edu>
	    Joseph Myers  <joseph@codesourcery.com>

	* timezone/private.h: Update from tzcode 2015g.
	* timezone/tzfile.h: Likewise.
	* timezone/tzselect.ksh: Likewise.
	* timezone/zdump.c: Likewise.
	* timezone/zic.c: Likewise.
	* timezone/ialloc.c: Remove file.
	* timezone/scheck.c: Likewise.
	* timezone/Makefile (extra-objs): Remove variable.
	($(objpfx)zic): Do not depend on scheck.o and ialloc.o.
	(tz-cflags): Add -DHAVE_GETTEXT -DUSE_LTZ=0
	-Wno-maybe-uninitialized.
	(CFLAGS-zdump.c): Remove -fwrapv -DNOID -DHAVE_GETTEXT.
	(CFLAGS-zic.c): Remove -DNOID -DHAVE_GETTEXT.
	(CFLAGS-ialloc.c): Remove variable.
	(CFLAGS-scheck.c): Likewise.
	* timezone/README: Update list of files from tzcode.

ChangeLog

@@ -1,3 +1,23 @@
+2016-01-06  Paul Eggert  <eggert@cs.ucla.edu>
+	    Joseph Myers  <joseph@codesourcery.com>
+
+	* timezone/private.h: Update from tzcode 2015g.
+	* timezone/tzfile.h: Likewise.
+	* timezone/tzselect.ksh: Likewise.
+	* timezone/zdump.c: Likewise.
+	* timezone/zic.c: Likewise.
+	* timezone/ialloc.c: Remove file.
+	* timezone/scheck.c: Likewise.
+	* timezone/Makefile (extra-objs): Remove variable.
+	($(objpfx)zic): Do not depend on scheck.o and ialloc.o.
+	(tz-cflags): Add -DHAVE_GETTEXT -DUSE_LTZ=0
+	-Wno-maybe-uninitialized.
+	(CFLAGS-zdump.c): Remove -fwrapv -DNOID -DHAVE_GETTEXT.
+	(CFLAGS-zic.c): Remove -DNOID -DHAVE_GETTEXT.
+	(CFLAGS-ialloc.c): Remove variable.
+	(CFLAGS-scheck.c): Likewise.
+	* timezone/README: Update list of files from tzcode.
+
 2016-01-07  Khem Raj  <raj.khem@gmail.com>
 
 	* argp/argp-fmtstream.c (__argp_fmtstream_free): Use fwrite_unlocked

timezone/Makefile

@@ -22,8 +22,6 @@ subdir	:= timezone
 
 include ../Makeconfig
 
-extra-objs := scheck.o ialloc.o
-
 others	:= zdump zic
 tests	:= test-tz tst-timezone tst-tzset
 
@@ -49,8 +47,6 @@ endif
 include ../Rules
 
 
-$(objpfx)zic: $(objpfx)scheck.o $(objpfx)ialloc.o
-
 $(objpfx)zic.o $(objpfx)zdump.o: $(objpfx)version.h
 
 $(objpfx)version.h: $(common-objpfx)config.make
@@ -61,15 +57,14 @@ $(objpfx)version.h: $(common-objpfx)config.make
 tz-cflags = -DTZDIR='"$(zonedir)"' \
 	    -DTZDEFAULT='"$(localtime-file)"' \
 	    -DTZDEFRULES='"$(posixrules-file)"' \
-	    -DTM_GMTOFF=tm_gmtoff -DTM_ZONE=tm_zone
+	    -DTM_GMTOFF=tm_gmtoff -DTM_ZONE=tm_zone \
+	    -DHAVE_GETTEXT -DUSE_LTZ=0 -Wno-maybe-uninitialized
 
 # The -Wno-unused-variable flag is used to prevent GCC 6
 # from warning about time_t_min and time_t_max which are
 # defined in private.h but not used.
-CFLAGS-zdump.c = -fwrapv -DNOID $(tz-cflags) -DHAVE_GETTEXT
-CFLAGS-zic.c = -DNOID $(tz-cflags) -DHAVE_GETTEXT -Wno-unused-variable
-CFLAGS-ialloc.c = -DNOID -DHAVE_GETTEXT -Wno-unused-variable
-CFLAGS-scheck.c = -DNOID -DHAVE_GETTEXT -Wno-unused-variable
+CFLAGS-zdump.c = $(tz-cflags)
+CFLAGS-zic.c = $(tz-cflags) -Wno-unused-variable
 
 # We have to make sure the data for testing the tz functions is available.
 # Don't add leapseconds here since test-tz made checks that work only without

timezone/README

@@ -1,5 +1,5 @@
 The files
-	zic.c zdump.c ialloc.c scheck.c tzfile.h
+	zic.c zdump.c tzfile.h
 	private.h tzselect.ksh checktab.awk
 come from the tzcode package by Arthur David Olson et.al.