emacs/lib/ChangeLog

2011-02-09  Paul Eggert  <eggert@cs.ucla.edu>

	* Makefile.in, gnulib.mk: Regenerate.
	This merges the following fix from gnulib:

	2011-02-08  Bruno Haible  <bruno@clisp.org>

	Split large sed scripts, for HP-UX sed.

2011-02-06  Paul Eggert  <eggert@cs.ucla.edu>

	gnulib: allow multiple gnulib generated replacements to coexist
	This defines a few preprocessor symbols that should not affect Emacs.
	* getopt.in.h, time.in.h, unistd.in.h: Regenerate
	via "make sync-from-gnulib".

	gnulib: undo previous change
	The upstream _HEADERS change was backed out of gnulib (see the
	same thread).  Stay in sync with gnulib.

	gnulib: adjust to upstream _HEADERS change
	* Makefile.am (EXTRA_HEADERS, nodist_pkginclude_HEADERS):
	New empty macros, to accommodate recent changes to gnulib.  See
	<http://lists.gnu.org/archive/html/bug-gnu2011-02/msg00068.html>.
	* Makefile.in, ftoastr.h, getopt.in.h:
	* gnulib.mk, ignore-value.h, stdbool.in.h, stddef.in.h:
	* time.in.h, unistd.in.h:
	Regenerate.

2011-02-03  Paul Eggert  <eggert@cs.ucla.edu>

	allow C code to suppress warnings about ignored return values
	* Makefile.in, gnulib.mk: Regenerate.
	* ignore-value.h: New file.

2011-01-31  Eli Zaretskii  <eliz@gnu.org>

	* makefile.w32-in (GNULIBOBJS): Add $(BLD)/strftime.$(O) and
	$(BLD)/time_r.$(O).
	($(BLD)/dtoastr.$(O)): Depend on $(EMACS_ROOT)/src/s/ms-w32.h and
	$(EMACS_ROOT)/src/m/intel386.h.
	($(BLD)/strftime.$(O)):
	($(BLD)/time_r.$(O)): Define prerequisites.

2011-01-30  Paul Eggert  <eggert@cs.ucla.edu>

	strftime: import from gnulib
	* Makefile.in, gnulib.mk:
	Regenerate.
	* strftime.c, strftime.h, stdbool.in.h: New files,
	imported from gnulib.
	This incorporates many changes from gnulib, including simpler
	handling of multibyte formats, porting to mingw32 and other
	platforms, and support for higher-resolution time stamps.
	Emacs does not yet use the higher-resolution interface.

2011-01-30  Paul Eggert  <eggert@cs.ucla.edu>

	gnulib: import mktime and move-if-change fixes from gnulib

	* configure: Regenerate from the following.

	2011-01-30  Paul Eggert  <eggert@cs.ucla.edu>

	mktime: clarify long_int width checking
	* mktime.c (long_int_is_wide_enough): Move this assertion to
	the top level, to make it clearer that the assumption about
	long_int width is being checked.  See
	<http://lists.gnu.org/archive/html/bug-gnulib/2011-01/msg00554.html>.

	2011-01-29  Paul Eggert  <eggert@cs.ucla.edu>

	TYPE_MAXIMUM: avoid theoretically undefined behavior
	* intprops.h (TYPE_MINIMUM, TYPE_MAXIMUM): Do not shift a
	negative number, which the C Standard says has undefined behavior.
	In practice this is not a problem, but might as well do it by the book.
	Reported by Rich Felker and Eric Blake; see
	<http://lists.gnu.org/archive/html/bug-gnulib/2011-01/msg00493.html>.
	* mktime.c (TYPE_MAXIMUM): Redo slightly to match the others.

	mktime: #undef mktime before #defining it
	* mktime.c (mktime) [DEBUG]: #undef mktime before #defining it.

	mktime: systematically normalize tm_isdst comparisons
	* mktime.c (isdst_differ): New function.
	(__mktime_internal): Use it systematically for all isdst comparisons.
	This completes the fix for libc BZ #6723, and removes the need for
	normalizing tm_isdst.  See
	<http://sourceware.org/bugzilla/show_bug.cgi?id=6723>
	(not_equal_tm) [DEBUG]: Use isdst_differ here, too.

	mktime: fix some integer overflow issues and sidestep the rest

	This was prompted by a bug report by Benjamin Lindner for MinGW
	<http://lists.gnu.org/archive/html/bug-gnulib/2011-01/msg00472.html>.
	His bug is due to signed integer overflow (0 - INT_MIN), and I
	I scanned through mktime.c looking for other integer overflow
	problems, fixing all the bugs I found.

	Although the C Standard says the resulting code is still not safe
	in the presence of integer overflow, in practice it should be good
	enough for all real-world two's-complement implementations, except
	for debugging environments that deliberately trap on integer
	overflow (e.g., gcc -ftrapv).

	* mktime.c (WRAPV): New macro.
	(SHR): Also check that long_int and time_t shift right in the
	usual way, before using the fast-but-unportable method.
	(TYPE_ONES_COMPLEMENT, TYPE_SIGNED_MAGNITUDE): Remove, no longer
	used.  The code already assumed two's complement, so there's
	no need to test for alternatives.  All uses removed.
	(TYPE_MAXIMUM): Don't rely here on overflow behavior not defined by
	the C standard.  Problem reported by Rich Felker in
	<http://lists.gnu.org/archive/html/bug-gnulib/2011-01/msg00488.html>.
	(twos_complement_arithmetic): Also check long_int and time_t.
	(time_t_avg, time_t_add_ok, time_t_int_add_ok): New functions.
	(guess_time_tm, ranged_convert, __mktime_internal): Use them.
	(__mktime_internal): Avoid integer overflow with unary subtraction
	in two instances where -1 - X is an adequate replacement for -X,
	since the calculations are approximate.

	2011-01-28  Paul Eggert  <eggert@cs.ucla.edu>

	mktime: avoid problems on NetBSD 5 / i386
	* mktime.c (long_int): New type.  This works around a problem
	on NetBSD 5 / i386, where 'long int' and 'int' are both 32 bits
	but time_t is 64 bits, and where I expect the existing code is
	wrong in some cases.
	(leapyear, ydhms_diff, guess_time_tm, __mktime_internal): Use it.
	(ydhms_diff): Bring back the compile-time check for wide-enough
	year and yday.

	mktime: fix misspelling in comment
	* mktime.c (__mktime_internal): Fix misspelling in comment.
	This merges all recent glibc changes of importance.

2011-01-29  Eli Zaretskii  <eliz@gnu.org>

	* makefile.w32-in:
	* getopt_.h: New files.

2011-01-27  Paul Eggert  <eggert@cs.ucla.edu>

	fix two m4/gnulib-*.m4 file names that clashed under MS-DOS
	* Makefile.in: Regenerate.

2011-01-24  Paul Eggert  <eggert@cs.ucla.edu>

	Remove HAVE_RAW_DECL_CHOWN etc. from config.h
	* Makefile.in: Regenerate.

2011-01-17  Paul Eggert  <eggert@cs.ucla.edu>

	Makefile.in: tidy up the building of lib
	* Makefile.in: Regenerate.
	* COPYING: New file, a copy of COPYING.

	Regenerate.
	* getopt.c, getopt.in.h, getopt1.c, getopt_int.h:
	* gettext.h, unistd.in.h:
	New files, copied from gnulib by gnulib-tool.
	* Makefile.in:
	Regenerate.

	Regenerate.
	* mktime-internal.h, mktime.c:
	* stddef.in.h, time.h, time.in.h, time_r.c:
	New files, copied from gnulib by gnulib-tool.
	* Makefile.in, gnulib.mk:
	Regenerate.

	Regenerate.
	* dtoastr.c, ftoastr.c, ftoastr.h, intprops.h:
	* ldtoastr.c:
	New files, copied from gnulib by gnulib-tool.
	* dummy.c: Remove.
	* Makefile.in, gnulib.mk:
	Regenerate.

	Regenerate.
	* Makefile.in, dummy.c, gnulib.mk:
	New files, generated automatically, with 'make sync-from-gnulib'
	followed by 'make'.

	Automate syncing from gnulib.
	* Makefile.am: New file.