Version 2.4.1b.

* NEWS (2.4.2): Rename to... (2.4.1b): ... this for now. Set date. * configure.ac (AM_INIT_AUTOMAKE): Disable gnits for now because it does not like this version name.
tests: fix maintainer-xml-check for recent changes.
2026-08-08 18:25:13 +00:00 · 2010-02-22 21:59:18 -05:00 · 2010-02-22 21:54:34 -05:00 · 2010-02-22 18:09:19 -05:00 · 2010-02-04 21:07:07 -05:00 · 2010-02-01 15:54:41 -05:00
190 changed files with 2812 additions and 2145 deletions
@@ -26,6 +26,7 @@ conftest*
 gnulib
 javacomp.sh
 javaexec.sh
+maint.mk
 patches
 releases
 stamp-h*
@@ -26,6 +26,7 @@
 /gnulib
 /javacomp.sh
 /javaexec.sh
+/maint.mk
 /patches
 /releases
 /stamp-h*
@@ -0,0 +1,6 @@
+COPYING
+^doc/fdl\.texi$
+^doc/gpl-3\.0\.texi$
+^doc/yacc\.1\.in$
+^src/parse-gram\.h$
+^data/m4sugar/
@@ -1,3 +1,631 @@
+2010-02-22  Joel E. Denny  <[email protected]>
+
+	Version 2.4.1b.
+	* NEWS (2.4.2): Rename to...
+	(2.4.1b): ... this for now.  Set date.
+	* configure.ac (AM_INIT_AUTOMAKE): Disable gnits for now because
+	it does not like this version name.
+
+2010-02-22  Joel E. Denny  <[email protected]>
+
+	tests: fix maintainer-xml-check for recent changes.
+	* tests/output.at (AT_CHECK_CONFLICTING_OUTPUT): Use
+	AT_BISON_CHECK_NO_XML rather than AT_BISON_CHECK because an
+	output file whose name conflicts with a previous output file
+	is now never generated.
+
+2010-02-22  Joel E. Denny  <[email protected]>
+
+	portability: fix several issues with M4 subprocess.
+
+	M4's output pipe was not being drained upon fatal errors during
+	scan_skel.  As a result, broken-pipe messages from M4 were seen
+	on at least AIX, HP-UX, Solaris, and RHEL4, and this caused a
+	failure in the test suite.  The problem was that, on platforms
+	where the default disposition for SIGPIPE is ignore instead of
+	terminate, M4 sometimes saw fwrite fail with errno=EPIPE and
+	then reported it.  However, there's some sort of race condition,
+	because the new test group occasionally succeeded.
+	Reported by Albert Chin at
+	<http://lists.gnu.org/archive/html/bug-bison/2010-02/msg00004.html>.
+
+	There were also problems with the test suite livelocking on
+	Tru64 5.1b.  Reported by Didier Godefroy at
+	<http://lists.gnu.org/archive/html/bug-bison/2009-05/msg00005.html>.
+	Switching to create_pipe_bidi suggested by Akim Demaille.
+
+	To attempt to solve both of these problems, switch to gnulib's
+	create_pipe_bidi and register M4 process as a slave.  Along the
+	way, clean up file name conflict handling, which was affected by
+	the broken-pipe problem before the switch.
+	* NEWS (2.4.2): Document.
+	* THANKS (Didier Godefroy): Add.
+	* bootstrap.conf (gnulib_modules): Add pipe.
+	* gnulib: Update to latest to make sure we have all the latest
+	fixes.
+	* lib/Makefile.am (libbison_a_SOURCES): Remove subpipe.h and
+	subpipe.c.
+	* po/POTFILES.in (lib/subpipe.c): Remove.
+	* src/files.c (compute_output_file_names): Update invocations
+	of output_file_name_check.
+	(output_file_name_check): In the case that the grammar file
+	would be overwritten, use complain instead of fatal, but replace
+	the output file name with /dev/null.  Use the /dev/null solution
+	for the case of two conflicting output files as well because it
+	seems safer in case Bison one day tries to open both files at
+	the same time.
+	* src/files.h (output_file_name_check): Update prototype.
+	* src/output.c (output_skeleton): Use create_pipe_bidi and
+	wait_subprocess.  Assert that scan_skel completely drains the
+	pipe.
+	* src/scan-skel.l (at_directive_perform): Update
+	output_file_name_check invocation.
+	* tests/output.at (AT_CHECK_CONFLICTING_OUTPUT): Check that the
+	grammar file actually isn't overwritten.
+	(Conflicting output files: -o foo.y): Update expected output.
+	* tests/skeletons.at (Fatal errors but M4 continues producing
+	output): New test group.
+
+2010-02-04  Joel E. Denny  <[email protected]>
+
+	Update POTFILES.
+	* HACKING (Release Procedure): Add reminder about keeping
+	POTFILES files up-to-date.
+	* po/POTFILES.in (src/muscle_tab.c, src/scan-skel.l): Add.
+
+2010-02-01  Joel E. Denny  <[email protected]>
+
+	tests: link lib/libbison.a for gnulib.
+	This solves a problem on Solaris 2.7 where the testsuite needs
+	at least gnulib's rpl_fopen.  Reported by Albert Chin at
+	<http://lists.gnu.org/archive/html/bug-bison/2010-02/msg00001.html>.
+	* NEWS (2.4.2): Document.
+	* tests/atlocal.in (LIBS): As for LDADD in src/Makefile.am, add
+	lib/libbison.a.
+
+2010-01-22  Joel E. Denny  <[email protected]>
+
+	Prepare for 2.4.2 release.
+	* NEWS (2.4.1a): Rename back to...
+	(2.4.2): ... this, and unset date.
+	* configure.ac (AM_INIT_AUTOMAKE): Re-enable gnits.
+
+2010-01-22  Joel E. Denny  <[email protected]>
+
+	Version 2.4.1a delayed.
+	* NEWS (2.4.1a): Increment release date as there has been a
+	small delay in getting the announcements and tarballs out.
+
+2010-01-21  Joel E. Denny  <[email protected]>
+
+	Version 2.4.1a.
+	* NEWS (2.4.2): Rename to...
+	(2.4.1a): ... this for now.  Set date.
+	* configure.ac (AM_INIT_AUTOMAKE): Disable gnits for now because
+	it does not like this version name.
+
+2010-01-21  Joel E. Denny  <[email protected]>
+
+	* cfg.mk (gnulib_dir): Assume gnulib is a subdirectory.
+
+2010-01-21  Joel E. Denny  <[email protected]>
+
+	maint: automate PACKAGE_COPYRIGHT_YEAR update, and update it.
+	* HACKING (Release Procedure): Update notes on copyright years.
+	* Makefile.am (update-package-copyright-year): New target rule.
+	* build-aux/update-package-copyright-year: New file.
+	* cfg.mk (update-copyright): Add update-package-copyright-year
+	as a dependency.
+
+2010-01-19  Joel E. Denny  <[email protected]>
+
+	* bootstrap: Import improvements from latest gnulib.
+
+2010-01-19  Joel E. Denny  <[email protected]>
+
+	build: require Automake 1.11.1 to avoid a security flaw.
+	* HACKING (Release Procedure): Don't document Automake security
+	flaw here.
+	* configure.ac (AM_INIT_AUTOMAKE): Require 1.11.1, and explain
+	why here.
+
+2010-01-19  Joel E. Denny  <[email protected]>
+
+	gnulib: update to latest.
+
+2010-01-19  Joel E. Denny  <[email protected]>
+
+	ChangeLog (2006-09-15): add Odd Arild Olsen's role for push.c.
+
+2010-01-15  Joel E. Denny  <[email protected]>
+
+	Thank the developer of the initial push parser implementation.
+	This unfortunate oversight is several years old.
+	* THANKS (Odd Arild Olsen): Add.
+
+2010-01-04  Joel E. Denny  <[email protected]>
+
+	maint: run "make update-copyright"
+
+2009-12-30  Joel E. Denny  <[email protected]>
+
+	POSIX: warn if %prec's token was not defined.
+	Reported by Florian Krohm at
+	<http://lists.gnu.org/archive/html/bug-bison/2009-12/msg00005.html>.
+	* NEWS (2.4.2): Document.
+	* src/reader.c (grammar_rule_check): Implement.
+	(grammar_current_rule_prec_set): Add comments explaining that we
+	here assume a %prec identifier is a token, but we still manage
+	to support POSIX.
+	* tests/input.at (%prec's token must be defined): New test
+	group.
+
+2009-12-31  Joel E. Denny  <[email protected]>
+
+	* HACKING (Release Procedure): Recommend a secure automake.
+
+2009-12-21  Joel E. Denny  <[email protected]>
+
+	YYFAIL: deprecate.
+	* NEWS (2.4.2): Document deprecation and the phase-out plan.
+	* data/lalr1.java (parser::YYStack::YYFAIL): Add comment about
+	deprecation.
+	* data/yacc.c (YYFAIL): Likewise, and suppress warnings about
+	YYFAIL from GCC cpp's -Wunused-macros.
+	* doc/bison.texinfo (Java Action Features): Remove YYFAIL
+	documentation.
+
+2009-12-16  Joel E. Denny  <[email protected]>
+
+	Add gcc's -Wundef to test suite and fix another warning from it.
+	* NEWS (2.4.2): Update description of -Wundef fix.
+	* configure.ac (WARN_CXXFLAGS_TEST): New substitution.
+	(WARN_CFLAGS_TEST): New substitution.
+	* data/glr.c: Avoid warning about __STRICT_ANSI__.
+	* tests/atlocal.in (CFLAGS): Use WARN_CFLAGS_TEST instead of
+	WARN_CFLAGS.
+	(CXXFLAGS): Use WARN_CXXFLAGS_TEST instead of WARN_CXXFLAGS.
+
+2009-12-16  Joel E. Denny  <[email protected]>
+
+	Document gcc -Wundef fix.
+	* NEWS (2.4.2): Here.
+	* THANKS (Jonathan Nieder): Add.
+
+2009-12-15  Jonathan Nieder  <[email protected]>  (tiny change)
+
+	Avoid warnings from gcc -Wundef y.tab.c.
+	* data/glr.c: Check if YYENABLE_NLS and YYLTYPE_IS_TRIVIAL are
+	defined before using them.
+	* data/lalr1.cc: Likewise.
+	* data/yacc.c: Likewise.
+
+2009-12-15  Joel E. Denny  <[email protected]>
+
+	Import M4 detection fix from Autoconf.
+	Reported by Eric Blake.
+	* m4/m4.m4: Copy serial 10.
+
+2009-12-14  Joel E. Denny  <[email protected]>
+
+	Enable assertion output and --disable-assert for configure.
+	* bootstrap.conf (gnulib_modules): Add assert module.
+	* src/system.h (aver): Define as assert, and summarize the
+	discussion on this issue.
+
+2009-10-11  Joel E. Denny  <[email protected]>
+
+	portability: use va_start and va_end in the same function.
+	* src/complain.c (error_message): Move va_end from here...
+	(ERROR_MESSAGE): ... to here.
+
+2009-10-04  Joel E. Denny  <[email protected]>
+
+	tests: skip tests of file names that platform does not support.
+	Reported by Michael Raskin at
+	<http://lists.gnu.org/archive/html/bug-bison/2009-09/msg00001.html>.
+	* THANKS (Michael Raskin): Add.
+	* tests/output.at (AT_CHECK_OUTPUT_FILE_NAME): Fix.  Cygwin used
+	to fail at least for file names containing ":" or "\".
+
+2009-09-16  Akim Demaille  <[email protected]>
+
+	doc: spell checking.
+	* doc/bison.texinfo: here.
+
+2009-09-13  Joel E. Denny  <[email protected]>
+
+	tests: clean up push.at test group titles.
+	* tests/push.at: Remove "Push Parsing: " from test group titles
+	because these are already under the banner "Push Parsing Tests".
+
+2009-09-03  Akim Demaille  <[email protected]>
+
+	* NEWS (2.4.2): Add "Internationalization" item.
+
+2009-09-03  Akim Demaille  <[email protected]>
+
+	bootstrap: fix/improve find_tool.
+	* bootstrap (find_tool): Improve error messages.
+	Fix typo about find_tool_names.
+
+2009-08-27  Eric Blake  <[email protected]>
+
+	scan-gram: avoid portability trap with ctype usage.
+	* src/scan-gram.l (<SC_ESCAPED_STRING,SC_ESCAPED_CHARACTER>):
+	Avoid compiler warning.
+
+2009-08-27  Joel E. Denny  <[email protected]>
+
+	tests: use perl for printing special sequences to files.
+	And skip tests if perl is not available.  This is better than
+	playing tricks with shell portability.  Suggested by Akim
+	Demaille.
+	* tests/input.at (Bad character literals): Use it here for
+	omitting final newlines.
+	(Bad escapes in literals): Use it here for special characters.
+
+2009-08-21  Joel E. Denny  <[email protected]>
+
+	Use locale when quoting.
+	* src/scan-gram.l (SC_ESCAPED_STRING, SC_ESCAPED_CHARACTER): Use
+	quote rather than implementing quoting here.
+
+2009-08-20  Eric Blake  <[email protected]>
+
+	Make previous patch more robust.
+	* src/output.c (ARRAY_CARDINALITY): New macro, copied from
+	argmatch.h.
+	(output_skeleton): Use it.
+	Suggested by Akim Demaille.
+
+	Import latest m4/m4.m4.
+	* m4/m4.m4: Copy from autoconf 2.64.
+	* configure.ac (M4_GNU_OPTION): New define.
+	* src/output.c (output_skeleton): Use it to resolve FIXME.
+	* NEWS: Mention this.
+
+2009-08-19  Joel E. Denny  <[email protected]>
+
+	Fix complaints about escape sequences.
+	Discussed starting at
+	<http://lists.gnu.org/archive/html/bison-patches/2009-08/msg00036.html>.
+	* src/scan-gram.l (SC_ESCAPED_STRING, SC_ESCAPED_CHARACTER):
+	For a \0 and similar escape sequences meaning the null
+	character, report an invalid escape sequence instead of an
+	invalid null character because the latter does not actually
+	appear in the user's input.
+	In all escape sequence complaints, don't escape the initial
+	backslash, and don't quote when the sequence appears at the end
+	of the complaint line unless there's whitespace that quotearg
+	won't escape.
+	Consistently say "invalid" not "unrecognized".
+	* tests/input.at (Bad escapes in literals): New.
+
+2009-08-19  Akim Demaille  <[email protected]>
+
+	doc: %initial-action to initialize yylloc.
+	Reported by Bill Allombert.
+	* doc/bison.texinfo: Set fill-column to 76.
+	(Location Type): Document the use of %initial-action to initialize
+	yylloc.
+
+2009-08-18  Joel E. Denny  <[email protected]>
+
+	maint: update for gnulib's recent update-copyright changes
+	* gnulib: Update.
+	* .x-update-copyright (COPYING): Add as it's no longer implied
+	when .x-update-copyright is present.
+	* cfg.mk (update-copyright-local): Remove, now ignored.
+	(update-copyright): Declare update-b4-copyright as a dependency.
+
+2009-08-17  Akim Demaille  <[email protected]>
+
+	build: lower gettext requirements.
+
+	Bison was uselessly requiring the formatstring macros from
+	gettext, which resulted in mo files not being installed on systems
+	that perfectly supported Bison mo files.  Lower the requirement.
+	http://lists.gnu.org/archive/html/bug-bison/2009-08/msg00006.html
+
+	* configure.ac: Require need-ngettext instead of
+	need-formatstring-macros.
+	Reported by Martin Jabocs.
+	Suggested by Bruno Haible.
+	* INSTALL: Restructure.
+	(Internationalization): New.
+
+2009-08-14  Joel E. Denny  <[email protected]>
+
+	maint: fix use of copyright year intervals.
+	* gnulib: Update.
+	* bootstrap.conf (gnulib_modules): Update getopt to getopt-gnu
+	as now recommended in gnulib/NEWS.
+	* build-aux/update-b4-copyright: Fix.
+	* cfg.mk (update-copyright-env): Configure update-copyright.
+
+2009-08-12  Akim Demaille  <[email protected]>
+
+	distcheck: fix.
+
+	* examples/calc++/Makefile.am: (EXTRA_DIST): Ship calc.stamp.
+
+2009-08-06  Joel E. Denny  <[email protected]>
+
+	maint: run "make update-copyright"
+	But first...
+	* .x-update-copyright (^data/m4sugar/): Add, because these
+	files are from Autoconf.
+
+2009-08-06  Joel E. Denny  <[email protected]>
+
+	maint: make update-b4-copyright easier to use
+	* build-aux/update-b4-copyright: In warnings, report line
+	numbers rather than character positions.
+	* cfg.mk (update-copyright-local): Set to update-b4-copyright so
+	that update-copyright runs it.
+	* gnulib: Update.
+
+2009-08-05  Joel E. Denny  <[email protected]>
+
+	maint: clean up update-b4-copyright code
+	* build-aux/update-b4-copyright: Do not accept 2-digit
+	UPDATE_COPYRIGHT_YEAR, which was not handled correctly.
+	Don't accept a `[' in a b4_copyright argument.
+	Format code more consistently.
+	Don't assume b4*copyright never occurs.
+
+2009-08-04  Joel E. Denny  <[email protected]>
+
+	maint: automate b4_copyright updates.
+	* Makefile.am (update-b4-copyright): New target rule.
+	* build-aux/Makefile.am (EXTRA_DIST): Add update-b4-copyright.
+	* build-aux/update-b4-copyright: New.
+	* data/yacc.c: Remove stray characters around b4_copyright
+	invocations.
+
+2009-08-04  Joel E. Denny  <[email protected]>
+
+	maint: automate annual package-wide copyright-year update.
+	* .x-update-copyright: New.
+	* Makefile.am (EXTRA_DIST): Remove maint.mk.
+	* bootstrap.conf (gnulib_modules): Add maintainer-makefile and
+	update-copyright.  Remove gnumakefile, which is implied by
+	maintainer-makefile.
+	* cfg.mk (bootstrap-tools): Copy from old maint.mk.
+	* gnulib: Update.
+	* maint.mk: Remove, now copied from gnulib.
+	* examples/extexi: Add missing "(C)" in copyright statement so
+	update-copyright can recognize it.
+	* src/LR0.h: Likewise.
+	* src/print.h: Likewise.
+	* src/print_graph.h: Likewise.
+	* src/gram.c: Add missing comma in copyright statement.
+	* src/gram.h: Likewise.
+
+2009-08-04  Joel E. Denny  <[email protected]>
+
+	Fix "make distcheck".
+	* examples/calc++/Makefile.am: Say $(srcdir)/calc.stamp instead
+	of just calc.stamp.
+
+2009-08-01  Joel E. Denny  <[email protected]>
+
+	Pacify "gcc -Wunused" for the input function from Flex.
+	Reported by Alex Rozenman.  This warning shows up with gcc-4.3.0
+	and later.
+	* src/scan-code.l: Add "%option noinput", which I cannot find in
+	the Flex manual, but which Flex has supported since at least as
+	far back as 2.5.4.  However, if any of our developers still use
+	Flex 2.5.4, they'll need to stop configuring with
+	--enable-gcc-warnings because "%option noinput" didn't work
+	correctly until Flex 2.5.6.
+	* src/scan-gram.l: Likewise.
+	* src/scan-skel.l: Likewise.
+
+2009-06-29  Akim Demaille  <[email protected]>
+
+	build: avoid concurrent extraction of calc++.
+	* examples/calc++/Makefile.am (calc.stamp): New.
+	Depend on it to create the sources of calc++ so that concurrent
+	builds don't launch several "extexi" in parallel.
+	Not only this is inefficient, this also builds incorrect sources
+	with several extractions mixed together.
+
+2009-06-25  Akim Demaille  <[email protected]>
+
+	hash: check insertion for memory exhaustion.
+	* src/uniqstr.c (uniqstr_new): New.
+
+2009-06-11  Akim Demaille  <[email protected]>
+
+	hash: check insertion for memory exhaustion.
+	* src/muscle-tab.c (muscle_insert, muscle_grow)
+	* src/state.c (state_hash_insert): Check the return value of
+	hash_insert.
+
+2009-06-10  Akim Demaille  <[email protected]>
+
+	gnulib: update.
+	* gnulib: Update to latest.
+	* lib/.cvsignore, lib/.gitignore, m4/.cvsignore,
+	* m4/.gitignore: Regen.
+	* src/symtab.c (symbol_from_uniqstr, semantic_type_from_uniqstr):
+	Call xalloc_die on hash_insert failures.
+	Requested by the new __warn_unused_result__ attribute of
+	hash_insert.
+
+2009-05-22  Joel E. Denny  <[email protected]>
+
+	* data/c++.m4: Update copyright year.
+
+2009-05-19  Joel E. Denny  <[email protected]>
+
+	Handle a trailing `:' in a user-supplied C++ namespace better.
+	* data/c++.m4 (b4_namespace_close): Don't let it be printed
+	among the closing braces here.  This fix might make the
+	generated code easier to debug, but otherwise it should be
+	insignificant because a trailing `:' is a C++ error already.
+
+2009-05-11  Akim Demaille  <[email protected]>
+
+	doc: use C++ headers.
+	* doc/bison.texinfo (Calc++ Scanner): Prefer C++ headers to C
+	headers.
+
+2009-05-01  Joel E. Denny  <[email protected]>
+
+	Declare %code to be a permanent feature.
+	* NEWS (2.4.2): Here.
+	* doc/bison.texinfo (Prologue Alternatives): Don't say it's
+	experimental.
+	(Decl Summary): Likewise.
+
+2009-04-14  Akim Demaille  <[email protected]>
+
+	doc: minor fixes.
+	* doc/bison.texinfo (Decl Summary): Fix entry about %debug.
+	(Table of Symbols): Remove duplicate entry for %debug.
+
+2009-04-06  Eric Blake  <[email protected]>
+
+	Work around autoconf 2.63b bug in testsuite.
+	* tests/output.at (AT_CHECK_OUTPUT_FILE_NAME): Avoid tripping
+	autoconf bug related to # in test.
+
+2009-04-06  Joel E. Denny  <[email protected]>
+
+	Fix options documentation.
+	* build-aux/cross-options.pl: As in --help output, write optional
+	arguments as [=ARG] not =[ARG].
+	* doc/bison.texinfo (Bison Options): Add -W/--warnings argument.
+
+2008-11-07  Akim Demaille  <[email protected]>
+
+	Fix --help.
+	* src/getargs.c (usage): Fix help string for -W.
+
+2008-11-07  Akim Demaille  <[email protected]>
+
+	Handle more general types of option arguments.
+	* build-aux/cross-options.pl: The argument ends at the first
+	space, not the first non-symbol character.
+	Use @var for each word appearing the argument description.
+
+2009-04-04  Joel E. Denny  <[email protected]>
+
+	Remove spurious initial empty lines.
+	* data/location.cc: End the @output lines with an @.
+
+2008-11-04  Akim Demaille  <[email protected]>
+
+	Remove spurious initial empty lines.
+	* data/glr.c, data/glr.cc, data/lalr1.cc, data/lalr1.java,
+	* data/yacc.c: End the @output lines with an @.
+
+2009-04-04  Joel E. Denny  <[email protected]>
+
+	Replace BISON_PROG_GNU_M4 with Autoconf's AC_PROG_GNU_M4.
+	If the first m4 in $PATH is wrong, it keeps looking.  Moreover, its
+	requirements for a correct m4 are stricter.
+	* m4/m4.m4: Replace with Autoconf 2.63's m4/m4.m4.
+	* configure.ac: Update to use AC_PROG_GNU_M4.
+	Reported by Eric Blake.
+
+2009-04-03  Joel E. Denny  <[email protected]>
+
+	Help with updating web manual.
+	* HACKING: Incorporate instructions from gnulib/doc/README.
+	* bootstrap.conf (gnulib_modules): Add gendocs.
+
+2009-04-03  Joel E. Denny  <[email protected]>
+
+	Fix strange %define locations for default values.
+	Reported by Akim Demaille at
+	<http://lists.gnu.org/archive/html/bug-bison/2007-12/msg00001.html>
+	and discussed again starting at
+	<http://lists.gnu.org/archive/html/bison-patches/2008-11/msg00102.html>.
+	* data/bison.m4 (b4_percent_define_default): Leave syncline blank
+	because location information is bogus.
+	Use angle brackets to delimit fake file name because square brackets
+	look like underexpanded m4.  Choose a better fake file name.
+	Use negative line numbers.
+	* src/muscle_tab.c (muscle_percent_define_default): Likewise.
+	* src/location.c (location_print): If line for a boundary is negative,
+	only print that boundary's file name.
+	* src/location.h: Document that.
+	* tests/skeletons.at (%define Boolean variables: invalid skeleton
+	defaults): Update output.
+
+2008-11-07  Akim Demaille  <[email protected]>
+
+	Locations without columns for command line arguments.
+	* src/location.c (location_print): Don't display negative columns.
+	* src/location.h: Document this.
+
+2009-02-03  Joel E. Denny  <[email protected]>
+
+	Add reminder about uploading public key to keys.gnupg.net.
+	* HACKING (Release Procedure): Here.
+
+2009-03-31  Akim Demaille  <[email protected]>
+
+	bootstrap: --help to stdout.
+	* bootstrap (usage): Don't send --help to stderr.
+	Use a here doc instead of a long string.
+
+2009-03-31  Akim Demaille  <[email protected]>
+
+	bootstrap: README-hacking no longer exists
+	* bootstrap (checkout_only_file): Set to HACKING.
+
+2009-03-26  Akim Demaille  <[email protected]>
+
+	doc: merge HACKING and README-hacking.
+	Two files is confusing.
+	Reported by Alexandre Duret-Lutz.
+
+	* README-hacking: Merge into...
+	* HACKING (Working from the repository): here.
+
+2009-03-26  Akim Demaille  <[email protected]>
+
+	doc: update README-hacking.
+	* README-hacking: We now use git and git submodules.
+	Reported by Ralf Wildenhues and Alexandre Duret-Lutz.
+
+2009-03-26  Akim Demaille  <[email protected]>
+
+	lalr1.cc: avoid GCC 4.3 warnings.
+	GCC 4.3 now warns about "a || b && c" and asks for explicit
+	parentheses.
+	Reported by Alexandre Duret-Lutz.
+	* data/location.cc: Update copyright years.
+	(Position::operator==): Use parens to make precedence explicit.
+	Compare lines and columns first, as they are more likely to be
+	different, and they are faster to compare.
+
+2009-03-26  Akim Demaille  <[email protected]>
+
+	gnulib: update.
+	* gnulib: Update to latest.
+	* lib/Makefile.am (AM_CPPFLAGS): It is now defined by gnulib, so
+	use +=.
+
+2009-01-08  Akim Demaille  <[email protected]>
+
+	Fix grep portability issues.
+	Grep on Solaris does not support -q.
+	Reported by Summum Bonum.
+
+	* NEWS: Add a stub for 2.4.2.
+	* THANKS: Add Summum Bonum.
+	* tests/atlocal.in (EGREP): New.
+	(CC, CXX, XSLTPROC): Make it possible to override them via
+	envvars.
+	* tests/java.at: Use $EGREP instead of egrep.
+	Use AT_CHECK's ignore instead of grep's -q.
+
 2008-12-11  Joel E. Denny  <[email protected]>

 	Version 2.4.1.
@@ -3931,9 +4559,12 @@

 2006-09-15  Bob Rossi  <[email protected]>

+	Add support for push parsing.  Based on the original work of
+	Odd Arild Olsen <[email protected]>.
 	* data/Makefile.am (dist_pkgdata_DATA): Add push.c.
 	* data/c.m4 (YYPUSH): New.
 	(b4_push_if): New macro.  Use it instead of #ifdef YYPUSH.
+	* data/push.c: New file.
 	* src/getargs.c (push_parser): New var.
 	* src/getargs.h (push_parser): New declaration.
 	* src/output.c (prepare): Add macro insertion of `push_flag'.
@@ -21106,9 +21737,8 @@

 	-----

-	Copyright (C) 1987, 1988, 1991, 1992, 1993, 1994, 1995, 1996,
-	1997, 1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
-	Free Software Foundation, Inc.
+	Copyright (C) 1987-1988, 1991-2010 Free Software Foundation,
+	Inc.

 	Copying and distribution of this file, with or without
 	modification, are permitted provided the copyright notice and this
@@ -5,7 +5,7 @@ Don't put this file into the distribution.

 Everything related to the development of Bison is on Savannah:

-	http://savannah.gnu.org/projects/bison/
+        http://savannah.gnu.org/projects/bison/


 * Administrivia
@@ -47,6 +47,118 @@ of the .output file etc.  This excludes impossible error messages
 meant for the maintainers only.


+* Working from the repository
+
+These notes intend to help people working on the checked-out sources.
+These requirements do not apply when building from a distribution tarball.
+
+** Requirements
+
+We've opted to keep only the highest-level sources in the repository.
+This eases our maintenance burden, (fewer merges etc.), but imposes more
+requirements on anyone wishing to build from the just-checked-out sources.
+For example, you have to use the latest stable versions of the maintainer
+tools we depend upon, including:
+
+- Automake <http://www.gnu.org/software/automake/>
+- Autoconf <http://www.gnu.org/software/autoconf/>
+- Flex <http://www.gnu.org/software/flex/>
+- Gettext <http://www.gnu.org/software/gettext/>
+- Gzip <http://www.gnu.org/software/gzip/>
+- Perl <http://www.cpan.org/>
+- Rsync <http://samba.anu.edu.au/rsync/>
+- Tar <http://www.gnu.org/software/tar/>
+
+Valgrind <http://valgrind.org/> is also highly recommended, if
+Valgrind supports your architecture.
+
+Bison is written using Bison grammars, so there are bootstrapping
+issues.  The bootstrap script attempts to discover when the C code
+generated from the grammars is out of date, and to bootstrap with an
+out-of-date version of the C code, but the process is not foolproof.
+Also, you may run into similar problems yourself if you modify Bison.
+
+Only building the initial full source tree will be a bit painful.
+Later, after synchronizing from the repository a plain `make' should
+be sufficient.
+
+** First checkout
+
+Obviously, if you are reading these notes, you did manage to check out
+this package from the repository.  For the record, you will find all the
+relevant information on:
+
+        http://savannah.gnu.org/git/?group=bison
+
+Bison uses Git submodules: subscriptions to other Git repositories.
+In particular it uses gnulib, the GNU portability library.  To ask Git
+to perform the first checkout of the submodules, run
+
+       $ git submodule update --init
+
+Git submodule support is weak before versions 1.6 and later, you
+should probably upgrade Git if your version is older.
+
+The next step is to get other files needed to build, which are
+extracted from other source packages:
+
+        $ ./bootstrap
+
+And there you are!  Just
+
+        $ ./configure
+        $ make
+        $ make check
+
+At this point, there should be no difference between your local copy,
+and the master copy:
+
+        $ git diff
+
+should output no difference.
+
+Enjoy!
+
+** Updating
+
+The use of submodules make things somewhat different because git does
+not support recursive operations: submodules must be taken care of
+explicitly by the user.
+
+*** Updating Bison
+
+If you pull a newer version of a branch, say via `git pull', you might
+import requests for updated submodules.  A simple `git diff' will
+reveal if the current version of the submodule (i.e., the actual
+contents of the gnulib directory) and the current request from the
+subscriber (i.e., the reference of the version of gnulib that the
+Bison reporitory requests) differ.  To upgrade the submodules (i.e.,
+to check out the version that is actually requested by the subscriber,
+run `git submodule update'.
+
+        $ git pull
+        $ git submodule update
+
+*** Updating a submodule
+To update a submodule, say gnulib, do as follows:
+
+Get the most recent version of the master branch from git.
+
+        $ cd gnulib
+        $ git fetch
+        $ git checkout -b master --track origin/master
+
+Make sure Bison can live with that version of gnulib.
+
+        $ cd ..
+        $ ./bootstrap
+        $ make distcheck
+
+Register your changes.
+
+        $ git checkin ...
+
+
 * Test suite

 ** make check
@@ -85,8 +197,11 @@ release:

 * Release Procedure

-** Try to get the *.pot files to the Translation Project at least one week
-before a stable release, to give them time to translate them.
+** Try to get the *.pot files to the Translation Project at least one
+week before a stable release, to give them time to translate them.
+Before generating the *.pot files, make sure that po/POTFILES.in and
+runtime-po/POTFILES.in list all files with translatable strings.
+This helps: grep -l '\<_(' *

 ** Tests
 See above.
@@ -98,9 +213,17 @@ causes it to be rejected by recent Gettext releases; please report
 these to the Translation Project.

 ** Update README
-Make sure the information in this file is current.  Most notably, make sure it
-recommends a version of GNU M4 that is compatible with the latest Bison
-sources.
+Make sure the information in README is current.  Most notably, make sure
+it recommends a version of GNU M4 that is compatible with the latest
+Bison sources.
+
+** Check copyright years.
+We update years in copyright statements throughout Bison once at the
+start of every year by running `make update-copyright'.  However, before
+a release, it's good to verify that it's actually been run.  Besides the
+copyright statement for each Bison file, check the copyright statements
+that the skeletons insert into generated parsers, and check all
+occurrences of PACKAGE_COPYRIGHT_YEAR in configure.ac.

 ** Update NEWS
 The version number, *and* the date of the release (including for
@@ -109,9 +232,6 @@ betas).
 ** Update ChangeLog
 Should have an entry similar to `Version 1.49b.'.

-** Update configure.ac
-Be sure PACKAGE_COPYRIGHT_YEAR is up-to-date.
-
 ** Tag the release
 Before Bison will build with the right version number, you must tag the release
 in git.  Do this after all other changes.  The command is similar to:
@@ -145,9 +265,15 @@ The generic GNU upload procedure is at:

  http://www.gnu.org/prep/maintain/maintain.html#Automated-FTP-Uploads

-After following the instructions there to register your information so you're
-permitted to upload, here's a brief reminder of how to roll the tarballs and
-upload them:
+Follow the instructions there to register your information so you're permitted
+to upload.  Make sure your public key has been uploaded at least to
+keys.gnupg.net.  You can upload it with:
+
+  gpg --keyserver keys.gnupg.net --send-keys F125BDF3
+
+where F125BDF3 should be replaced with your key ID.
+
+Here's a brief reminder of how to roll the tarballs and upload them:

 *** make distcheck
 *** gpg -b bison-2.3b.tar.gz
@@ -165,6 +291,47 @@ upload them:
 *** put bison-2.3b.tar.gz.directive.asc
 *** Repeat all these steps for bison-2.3b.tar.bz2.

+** Update Bison manual on www.gnu.org.
+
+*** You need a non-anonymous checkout of the web pages directory.
+
+  $ cvs -d [email protected]:/web/bison checkout bison
+
+*** Get familiar with the instructions for web page maintainers.
+http://www.gnu.org/server/standards/readme_index.html
+http://www.gnu.org/server/standards/README.software.html
+especially the note about symlinks.
+
+*** Build the web pages.
+Assuming BISON_CHECKOUT refers to a checkout of the Bison dir, and
+BISON_WWW_CHECKOUT refers to the web directory created above, do:
+
+  $ cd $BISON_CHECKOUT/doc
+  $ make stamp-vti
+  $ ../build-aux/gendocs.sh -o "$BISON_WWW_CHECKOUT/manual" \
+    bison "Bison - GNU parser generator"
+  $ cd $BISON_WWW_CHECKOUT
+
+Verify that the result looks sane.
+
+*** Commit the modified and the new files.
+
+*** Remove old files.
+Find the files which have not been overwritten (because they belonged to
+sections that have been removed or renamed):
+
+   $ cd manual/html_node
+   $ ls -lt
+
+Remove these files and commit their removal to CVS.  For each of these
+files, add a line to the file .symlinks.  This will ensure that
+hyperlinks to the removed files will redirect to the entire manual; this
+is better than a 404 error.
+
+There is a problem with 'index.html' being written twice (once for POSIX
+function 'index', once for the table of contents); you can ignore this
+issue.
+
 ** Announce
 To generate a template announcement file:

@@ -195,7 +362,7 @@ Push these changes.

 -----

-Copyright (C) 2002, 2003, 2004, 2005, 2007, 2008 Free Software Foundation, Inc.
+Copyright (C) 2002-2005, 2007-2010 Free Software Foundation, Inc.

 This file is part of GNU Bison.

@@ -1,6 +1,5 @@
 ## Process this file with automake to produce Makefile.in -*-Makefile-*-
-## Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
-## Foundation, Inc.
+## Copyright (C) 2001-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -23,7 +22,7 @@ SUBDIRS = build-aux po runtime-po lib data src doc examples tests etc
 aclocaldir = @aclocaldir@
 aclocal_DATA = m4/bison-i18n.m4

-EXTRA_DIST = .prev-version .version cfg.mk maint.mk \
+EXTRA_DIST = .prev-version .version cfg.mk \
  OChangeLog PACKAGING \
  djgpp/Makefile.maint djgpp/README.in djgpp/config.bat \
  djgpp/config.sed djgpp/config.site djgpp/config_h.sed \
@@ -57,3 +56,12 @@ $(top_srcdir)/.version: configure
 	echo $(VERSION) > $@-t && mv $@-t $@
 dist-hook:
 	echo $(VERSION) > $(distdir)/.tarball-version
+
+.PHONY: update-b4-copyright update-package-copyright-year
+update-b4-copyright:
+	find data -type f                    \
+	  | grep -v -E '^data/bison.m4$$'    \
+	  | xargs $(build_aux)/$@
+	@echo 'warning: src/parse-gram.[hc] may need to be regenerated.'
+update-package-copyright-year:
+	$(build_aux)/$@ configure.ac
@@ -1,6 +1,98 @@
 Bison News
 ----------

+* Changes in version 2.4.1b (2010-02-22):
+
+** Some portability problems that resulted in failures and livelocks
+   in the test suite on some versions of at least Solaris, AIX, HP-UX,
+   RHEL4, and Tru64 have been fixed.  As part of those fixes, fatal
+   Bison errors no longer cause M4 to report a broken pipe on the
+   affected platforms.
+
+** `%prec IDENTIFIER' requires IDENTIFIER to be defined separately.
+
+  POSIX specifies that an error be reported for any identifier that does
+  not appear on the LHS of a grammar rule and that is not defined by
+  %token, %left, %right, or %nonassoc.  Bison 2.3b and later lost this
+  error report for the case when an identifier appears only after a
+  %prec directive.  It is now restored.  However, for backward
+  compatibility with recent Bison releases, it is only a warning for
+  now.  In Bison 2.5 and later, it will return to being an error.
+
+** Detection of GNU M4 1.4.6 or newer during configure is improved.
+
+** Warnings from gcc's -Wundef option about undefined YYENABLE_NLS,
+   YYLTYPE_IS_TRIVIAL, and __STRICT_ANSI__ in C/C++ parsers are now
+   avoided.
+
+** %code is now a permanent feature.
+
+  A traditional Yacc prologue directive is written in the form:
+
+    %{CODE%}
+
+  To provide a more flexible alternative, Bison 2.3b introduced the
+  %code directive with the following forms for C/C++:
+
+    %code          {CODE}
+    %code requires {CODE}
+    %code provides {CODE}
+    %code top      {CODE}
+
+  These forms are now considered permanent features of Bison.  See the
+  %code entries in the section "Bison Declaration Summary" in the Bison
+  manual for a summary of their functionality.  See the section
+  "Prologue Alternatives" for a detailed discussion including the
+  advantages of %code over the traditional Yacc prologue directive.
+
+  Bison's Java feature as a whole including its current usage of %code
+  is still considered experimental.
+
+** YYFAIL is deprecated and will eventually be removed.
+
+  YYFAIL has existed for many years as an undocumented feature of
+  deterministic parsers in C generated by Bison.  Previously, it was
+  documented for Bison's experimental Java parsers.  YYFAIL is no longer
+  documented for Java parsers and is formally deprecated in both cases.
+  Users are strongly encouraged to migrate to YYERROR, which is
+  specified by POSIX.
+
+  Like YYERROR, you can invoke YYFAIL from a semantic action in order to
+  induce a syntax error.  The most obvious difference from YYERROR is
+  that YYFAIL will automatically invoke yyerror to report the syntax
+  error so that you don't have to.  However, there are several other
+  subtle differences between YYERROR and YYFAIL, and YYFAIL suffers from
+  inherent flaws when %error-verbose or `#define YYERROR_VERBOSE' is
+  used.  For a more detailed discussion, see:
+
+    http://lists.gnu.org/archive/html/bison-patches/2009-12/msg00024.html
+
+  The upcoming Bison 2.5 will remove YYFAIL from Java parsers, but
+  deterministic parsers in C will continue to implement it.  However,
+  because YYFAIL is already flawed, it seems futile to try to make new
+  Bison features compatible with it.  Thus, during parser generation,
+  Bison 2.5 will produce a warning whenever it discovers YYFAIL in a
+  rule action.  In a later release, YYFAIL will be disabled for
+  %error-verbose and `#define YYERROR_VERBOSE'.  Eventually, YYFAIL will
+  be removed altogether.
+
+  There exists at least one case where Bison 2.5's YYFAIL warning will
+  be a false positive.  Some projects add phony uses of YYFAIL and other
+  Bison-defined macros for the sole purpose of suppressing C
+  preprocessor warnings (from GCC cpp's -Wunused-macros, for example).
+  To avoid Bison's future warning, such YYFAIL uses can be moved to the
+  epilogue (that is, after the second `%%') in the Bison input file.  In
+  this release (2.4.1b), Bison already generates its own code to suppress
+  C preprocessor warnings for YYFAIL, so projects can remove their own
+  phony uses of YYFAIL if compatibility with Bison releases prior to
+  2.4.1b is not necessary.
+
+** Internationalization.
+
+  Fix a regression introduced in Bison 2.4: Under some circumstances,
+  message translations were not installed although supported by the
+  host system.
+
 * Changes in version 2.4.1 (2008-12-11):

 ** In the GLR defines file, unexpanded M4 macros in the yylval and yylloc
@@ -1048,10 +1140,9 @@ End:

 -----

-Copyright (C) 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
-2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+Copyright (C) 1995-2010 Free Software Foundation, Inc.

-This file is part of Bison, the GNU Compiler Compiler.
+This file is part of Bison, the GNU Parser Generator.

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -36,7 +36,7 @@ to the bison package.

 -----

-Copyright (C) 2002, 2005 Free Software Foundation, Inc.
+Copyright (C) 2002, 2005, 2009-2010 Free Software Foundation, Inc.

 This file is part of Bison, the GNU Compiler Compiler.

@@ -1,31 +1,47 @@
 This package contains the GNU Bison parser generator.

-See the file INSTALL for generic compilation and installation instructions.
+* Installation
+** Build
+See the file INSTALL for generic compilation and installation
+instructions.

+Bison requires GNU m4 1.4.6 or later.  See:
+
+      ftp://ftp.gnu.org/gnu/m4/m4-1.4.6.tar.gz
+
+** Internationalization
+Bison supports two catalogues: one for Bison itself (i.e., for the
+maintainer-side parser generation), and one for the generated parsers
+(i.e., for the user-side parser execution).  The requirements between
+both differ: bison needs ngettext, the generated parsers do not.  To
+simplify the build system, neither are installed if ngettext is not
+supported, even if generated parsers could have been localized.  See
+http://lists.gnu.org/archive/html/bug-bison/2009-08/msg00006.html for
+more details.
+
+* Questions
 See the section FAQ in the documentation (doc/bison.info) for
 frequently asked questions.  The documentation is also available in
 PDF and HTML, provided you have a recent version of Texinfo installed:
 run "make pdf" or "make html".

-Bison requires GNU m4 1.4.6 or later.  See:
-
-ftp://ftp.gnu.org/gnu/m4/m4-1.4.6.tar.gz
-
-Bison can work with pre-1.4.6 distributions of GNU m4 if they are
-sufficiently patched, but if you encounter a bug with an older
-distribution and report a bug we will probably suggest that you
-upgrade to 1.4.6 as the first step in trying to fix it.
+If you have questions about using Bison and the documentation does
+not answer them, please send mail to <[email protected]>.

+* Bug reports
 Please send bug reports to <[email protected]>.  Please include the
 version number from `bison --version', and a complete, self-contained
 test case in each bug report.

-If you have questions about using Bison and the documentation does
-not answer them, please send mail to <[email protected]>.
+
+Local Variables:
+mode: outline
+End:

 -----

-Copyright (C) 1992, 1998, 1999, 2003, 2004, 2005, 2008 Free Software Foundation, Inc.
+Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2010 Free Software
+Foundation, Inc.

 This file is part of Bison, the GNU Compiler Compiler.

@@ -12,7 +12,7 @@ the problems you encounter.

 -----

-Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+Copyright (C) 2002, 2004, 2009-2010 Free Software Foundation, Inc.

 This file is part of GNU Bison.

@@ -1,80 +0,0 @@
-*- outline -*-
-
-These notes intend to help people working on the checked-out sources.
-These requirements do not apply when building from a distribution tarball.
-
-* Requirements
-
-We've opted to keep only the highest-level sources in the repository.
-This eases our maintenance burden, (fewer merges etc.), but imposes more
-requirements on anyone wishing to build from the just-checked-out sources.
-For example, you have to use the latest stable versions of the maintainer
-tools we depend upon, including:
-
- Automake <http://www.gnu.org/software/automake/>
- Autoconf <http://www.gnu.org/software/autoconf/>
- Flex <http://www.gnu.org/software/flex/>
- Gettext <http://www.gnu.org/software/gettext/>
- Gzip <http://www.gnu.org/software/gzip/>
- Perl <http://www.cpan.org/>
- Rsync <http://samba.anu.edu.au/rsync/>
- Tar <http://www.gnu.org/software/tar/>
-
-Valgrind <http://valgrind.org/> is also highly recommended, if
-Valgrind supports your architecture.
-
-Bison is written using Bison grammars, so there are bootstrapping
-issues.  The bootstrap script attempts to discover when the C code
-generated from the grammars is out of date, and to bootstrap with an
-out-of-date version of the C code, but the process is not foolproof.
-Also, you may run into similar problems yourself if you modify Bison.
-
-Only building the initial full source tree will be a bit painful.
-Later, after synchronizing from the repository a plain `make' should
-be sufficient.
-
-* First checkout
-
-Obviously, if you are reading these notes, you did manage to check out
-this package from the repository.  For the record, you will find all the
-relevant information on:
-
-	http://savannah.gnu.org/cvs/?group_id=56
-
-The next step is to get other files needed to build, which are
-extracted from other source packages:
-
-	$ ./bootstrap
-
-And there you are!  Just
-
-	$ ./configure
-	$ make
-	$ make check
-
-At this point, there should be no difference between your local copy,
-and the master copy:
-
-	$ cvs diff
-
-should output no difference.
-
-Enjoy!
-
-----
-
-Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software
-Foundation, Inc.
-
-This program is free software: you can redistribute it and/or modify
-it under the terms of the GNU General Public License as published by
-the Free Software Foundation, either version 3 of the License, or
-(at your option) any later version.
-
-This program is distributed in the hope that it will be useful,
-but WITHOUT ANY WARRANTY; without even the implied warranty of
-MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-GNU General Public License for more details.
-
-You should have received a copy of the GNU General Public License
-along with this program.  If not, see <http://www.gnu.org/licenses/>.
@@ -14,6 +14,7 @@ Art Haas                  [email protected]
 Baron Schwartz            [email protected]
 Benoit Perrot             [email protected]
 Bert Deknuydt             [email protected]
+Bill Allombert            [email protected]
 Bob Rossi                 [email protected]
 Brandon Lucia             [email protected]
 Bruce Lilly               [email protected]
@@ -28,6 +29,7 @@ David J. MacKenzie        [email protected]
 Derek M. Jones            [email protected]
 Di-an Jan                 [email protected]
 Dick Streefland           [email protected]
+Didier Godefroy           [email protected]
 Enrico Scholz             [email protected]
 Eric Blake                [email protected]
 Evgeny Stambulchik        [email protected]
@@ -45,17 +47,20 @@ Jesse Thilo               [email protected]
 Jim Kent                  [email protected]
 Jim Meyering              [email protected]
 Joel E. Denny             [email protected]
+Jonathan Nieder           [email protected]
 Juan Manuel Guerrero      [email protected]
 Kees Zeelenberg           [email protected]
 Keith Browne              [email protected]
 Laurent Mascherpa         [email protected]
 Magnus Fromreide          [email protected]
 Marc Autret               [email protected]
+Martin Jacobs             [email protected]
 Martin Mokrejs            [email protected]
 Martin Nylin              [email protected]
 Matt Kraai                [email protected]
 Matt Rosing               [email protected]
 Michael Hayes             [email protected]
+Michael Raskin            [email protected]
 Mickael Labau             [email protected]
 Mike Castle               [email protected]
 Neil Booth                [email protected]
@@ -63,6 +68,7 @@ Nelson H. F. Beebe        [email protected]
 Nicolas Burrus            [email protected]
 Nicolas Tisserand         [email protected]
 Noah Friedman             [email protected]
+Odd Arild Olsen           [email protected]
 Oleg Smolsky              [email protected]
 Paolo Bonzini             [email protected]
 Pascal Bart               [email protected]
@@ -75,14 +81,16 @@ Piotr Gackiewicz          [email protected]
 Quoc Peyrot               [email protected]
 R Blake                   [email protected]
 Raja R Harinath           [email protected]
+Ralf Wildenhues           [email protected]
 Richard Stallman          [email protected]
 Robert Anisko             [email protected]
 Satya Kiran Popuri        [email protected]
-Sebastien Fricker         [email protected]
 Sebastian Setzer          [email protected]
+Sebastien Fricker         [email protected]
 Sergei Steshenko          [email protected]
 Shura                     [email protected]
 Steve Murphy              [email protected]
+Summum Bonum              [email protected]
 Tim Josling               [email protected]
 Tim Van Holder            [email protected]
 Tom Lane                  [email protected]
@@ -290,8 +290,7 @@ Equip the parser with a means to create the (visual) parse tree.

 -----

-Copyright (C) 2001, 2002, 2003, 2004, 2006 Free Software Foundation,
-Inc.
+Copyright (C) 2001-2004, 2006, 2009-2010 Free Software Foundation, Inc.

 This file is part of Bison, the GNU Compiler Compiler.

@@ -2,8 +2,7 @@

 # Bootstrap this package from checked-out sources.

-# Copyright (C) 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
-# Inc.
+# Copyright (C) 2003-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -36,28 +35,29 @@ bt_regex=`echo "$bt"| sed 's/\./[.]/g'`
 bt2=${bt}2

 usage() {
-  echo >&2 "\
+  cat <<EOF
 Usage: $0 [OPTION]...
 Bootstrap this package from the checked-out sources.

 Options:
 --gnulib-srcdir=DIRNAME  Specify the local directory where gnulib
-			  sources reside.  Use this if you already
-			  have gnulib sources on your machine, and
-			  do not want to waste your bandwidth downloading
-			  them again.
+                          sources reside.  Use this if you already
+                          have gnulib sources on your machine, and
+                          do not want to waste your bandwidth downloading
+                          them again.
 --copy                   Copy files instead of creating symbolic links.
 --force                  Attempt to bootstrap even if the sources seem
-			  not to have been checked out.
+                          not to have been checked out.
 --skip-po                Do not download po files.
- --cvs-user=USERNAME      Set the username to use when checking out
-			  sources from the gnulib repository.

-If the file bootstrap.conf exists in the current working directory, its
+If the file $0.conf exists in the same directory as this script, its
 contents are read as shell variables to configure the bootstrap.

+For build prerequisites, environment variables like \$AUTOCONF and \$AMTAR
+are honored.
+
 Running without arguments will suffice in most cases.
-"
+EOF
 }

 # Configuration.
@@ -71,6 +71,10 @@ gnulib_modules=
 # Any gnulib files needed that are not in modules.
 gnulib_files=

+# A function to be called after everything else in this script.
+# Override it via your own definition in bootstrap.conf.
+bootstrap_epilogue() { :; }
+
 # The command to download all .po files for a specified domain into
 # a specified directory.  Fill in the first %s is the domain name, and
 # the second with the destination directory.  Use rsync's -L and -r
@@ -81,9 +85,10 @@ po_download_command_format=\

 extract_package_name='
  /^AC_INIT(/{
-     /.*,.*,.*,/{
+     /.*,.*,.*, */{
       s///
       s/[][]//g
+       s/)$//
       p
       q
     }
@@ -99,16 +104,21 @@ package=`sed -n "$extract_package_name" configure.ac` || exit
 gnulib_name=lib$package

 build_aux=build-aux
+source_base=lib
+m4_base=m4
+doc_base=doc
+tests_base=tests
+
 # Extra files from gnulib, which override files from other sources.
 gnulib_extra_files="
-	$build_aux/install-sh
-	$build_aux/missing
-	$build_aux/mdate-sh
-	$build_aux/texinfo.tex
-	$build_aux/depcomp
-	$build_aux/config.guess
-	$build_aux/config.sub
-	doc/INSTALL
+        $build_aux/install-sh
+        $build_aux/missing
+        $build_aux/mdate-sh
+        $build_aux/texinfo.tex
+        $build_aux/depcomp
+        $build_aux/config.guess
+        $build_aux/config.sub
+        doc/INSTALL
 "

 # Additional gnulib-tool options to use.  Use "\newline" to break lines.
@@ -124,12 +134,15 @@ XGETTEXT_OPTIONS='\\\
 --flag=error:3:c-format --flag=error_at_line:5:c-format\\\
 '

+# Package bug report address for gettext files
+[email protected]
+
 # Files we don't want to import.
 excluded_files=

 # File that should exist in the top directory of a checked out hierarchy,
 # but not in a distribution tarball.
-checkout_only_file=README-hacking
+checkout_only_file=HACKING

 # Whether to use copies instead of symlinks.
 copy=false
@@ -142,29 +155,37 @@ vc_ignore=auto

 # find_tool ENVVAR NAMES...
 # -------------------------
+# Search for a required program.  Use the value of ENVVAR, if set,
+# otherwise find the first of the NAMES that can be run (i.e.,
+# supports --version).  If found, set ENVVAR to the program name,
+# die otherwise.
 find_tool ()
 {
  # Find sha1sum, named gsha1sum on MacPorts.
  find_tool_envvar=$1
  shift
-  if eval test x"\$$find_tool_envvar" = x; then
+  find_tool_names=$@
+  eval "find_tool_res=\$$find_tool_envvar"
+  if test x"$find_tool_res" = x; then
    for i
    do
      if ($i --version </dev/null) >/dev/null 2>&1; then
-	find_tool_res=$i
-	break
+       find_tool_res=$i
+       break
      fi
    done
+  else
+    find_tool_error_prefix="\$$find_tool_envvar: "
  fi
  if test x"$find_tool_res" = x; then
-    echo >&2 "$0: $find_tool_name is required"
+    echo >&2 "$0: one of these is required: $find_tool_names"
    exit 1
  fi
  ($find_tool_res --version </dev/null) >/dev/null 2>&1 || {
-    echo >&2 "$0: cannot run $find_tool_res --version"
+    echo >&2 "$0: ${find_tool_error_prefix}cannot run $find_tool_res --version"
    exit 1
  }
-  eval "$find_tool_envvar=\"$find_tool_res\""
+  eval "$find_tool_envvar=\$find_tool_res"
  eval "export $find_tool_envvar"
 }

@@ -172,7 +193,13 @@ find_tool ()
 find_tool SHA1SUM sha1sum gsha1sum

 # Override the default configuration, if necessary.
-test -r bootstrap.conf && . ./bootstrap.conf
+# Make sure that bootstrap.conf is sourced from the current directory
+# if we were invoked as "sh bootstrap".
+case "$0" in
+  */*) test -r "$0.conf" && . "$0.conf" ;;
+  *) test -r "$0.conf" && . ./"$0.conf" ;;
+esac
+

 if test "$vc_ignore" = auto; then
  vc_ignore=
@@ -191,9 +218,7 @@ do
    usage
    exit;;
  --gnulib-srcdir=*)
-    GNULIB_SRCDIR=`expr "$option" : '--gnulib-srcdir=\(.*\)'`;;
-  --cvs-user=*)
-    CVS_USER=`expr "$option" : '--cvs-user=\(.*\)'`;;
+    GNULIB_SRCDIR=`expr "X$option" : 'X--gnulib-srcdir=\(.*\)'`;;
  --skip-po)
    SKIP_PO=t;;
  --force)
@@ -211,13 +236,13 @@ if test -n "$checkout_only_file" && test ! -r "$checkout_only_file"; then
  exit 1
 fi

-# If each line in $STR is not already on a line by itself in $FILE, insert it,
+# If $STR is not already on a line by itself in $FILE, insert it,
 # sorting the new contents of the file and replacing $FILE with the result.
 insert_sorted_if_absent() {
  file=$1
  str=$2
  test -f $file || touch $file
-  echo "$str" | sort -u - $file | cmp -s - $file \
+  echo "$str" | sort -u - $file | cmp - $file > /dev/null \
    || echo "$str" | sort -u - $file -o $file \
    || exit 1
 }
@@ -259,16 +284,113 @@ if test ! -d $build_aux; then
  done
 fi

-echo "$0: Bootstrapping from checked-out $package sources..."
+# Note this deviates from the version comparison in automake
+# in that it treats 1.5 < 1.5.0, and treats 1.4.4a < 1.4-p3a
+# but this should suffice as we won't be specifying old
+# version formats or redundant trailing .0 in bootstrap.conf.
+# If we did want full compatibility then we should probably
+# use m4_version_compare from autoconf.
+sort_ver() { # sort -V is not generally available
+  ver1="$1"
+  ver2="$2"

-cleanup_gnulib() {
-  status=$?
-  rm -fr gnulib
-  exit $status
+  # split on '.' and compare each component
+  i=1
+  while : ; do
+    p1=$(echo "$ver1" | cut -d. -f$i)
+    p2=$(echo "$ver2" | cut -d. -f$i)
+    if [ ! "$p1" ]; then
+      echo "$1 $2"
+      break
+    elif [ ! "$p2" ]; then
+      echo "$2 $1"
+      break
+    elif [ ! "$p1" = "$p2" ]; then
+      if [ "$p1" -gt "$p2" ] 2>/dev/null; then # numeric comparison
+        echo "$2 $1"
+      elif [ "$p2" -gt "$p1" ] 2>/dev/null; then # numeric comparison
+        echo "$1 $2"
+      else # numeric, then lexicographic comparison
+        lp=$(printf "$p1\n$p2\n" | LANG=C sort -n | tail -n1)
+        if [ "$lp" = "$p2" ]; then
+          echo "$1 $2"
+        else
+          echo "$2 $1"
+        fi
+      fi
+      break
+    fi
+    i=$(($i+1))
+  done
 }

-# See if we can use gnulib's git-merge-changelog merge driver.
+get_version() {
+  app=$1

+  $app --version >/dev/null 2>&1 || return 1
+
+  $app --version 2>&1 |
+  sed -n '# extract version within line
+          s/.*[v ]\{1,\}\([0-9]\{1,\}\.[.a-z0-9-]*\).*/\1/
+          t done
+
+          # extract version at start of line
+          s/^\([0-9]\{1,\}\.[.a-z0-9-]*\).*/\1/
+          t done
+
+          d
+
+          :done
+          #the following essentially does s/5.005/5.5/
+          s/\.0*\([1-9]\)/.\1/g
+          p
+          q'
+}
+
+check_versions() {
+  ret=0
+
+  while read app req_ver; do
+    # Honor $APP variables ($TAR, $AUTOCONF, etc.)
+    appvar=`echo $app | tr '[a-z]' '[A-Z]'`
+    test "$appvar" = TAR && appvar=AMTAR
+    eval "app=\${$appvar-$app}"
+    inst_ver=$(get_version $app)
+    if [ ! "$inst_ver" ]; then
+      echo "Error: '$app' not found" >&2
+      ret=1
+    elif [ ! "$req_ver" = "-" ]; then
+      latest_ver=$(sort_ver $req_ver $inst_ver | cut -d' ' -f2)
+      if [ ! "$latest_ver" = "$inst_ver" ]; then
+        echo "Error: '$app' version == $inst_ver is too old" >&2
+        echo "       '$app' version >= $req_ver is required" >&2
+        ret=1
+      fi
+    fi
+  done
+
+  return $ret
+}
+
+print_versions() {
+  echo "Program    Min_version"
+  echo "----------------------"
+  printf "$buildreq"
+  echo "----------------------"
+  # can't depend on column -t
+}
+
+if ! printf "$buildreq" | check_versions; then
+  test -f README-prereq &&
+  echo "See README-prereq for notes on obtaining these prerequisite programs:" >&2
+  echo
+  print_versions
+  exit 1
+fi
+
+echo "$0: Bootstrapping from checked-out $package sources..."
+
+# See if we can use gnulib's git-merge-changelog merge driver.
 if test -d .git && (git --version) >/dev/null 2>/dev/null ; then
  if git config merge.merge-changelog.driver >/dev/null ; then
    :
@@ -281,35 +403,52 @@ if test -d .git && (git --version) >/dev/null 2>/dev/null ; then
  fi
 fi

+
+cleanup_gnulib() {
+  status=$?
+  rm -fr gnulib
+  exit $status
+}
+
+git_modules_config () {
+  test -f .gitmodules && git config --file .gitmodules "$@"
+}
+
 # Get gnulib files.

 case ${GNULIB_SRCDIR--} in
 -)
-  if [ ! -d gnulib ]; then
+  if git_modules_config submodule.gnulib.url >/dev/null; then
    echo "$0: getting gnulib files..."
+    git submodule init || exit $?
+    git submodule update || exit $?

-    case ${CVS_AUTH-pserver} in
-    pserver)
-      CVS_PREFIX=':pserver:anonymous@';;
-    ssh)
-      CVS_PREFIX="$CVS_USER${CVS_USER+@}";;
-    *)
-      echo "$0: $CVS_AUTH: Unknown CVS access method" >&2
-      exit 1;;
-    esac
-
-    case $CVS_RSH in
-    '') CVS_RSH=ssh; export CVS_RSH;;
-    esac
+  elif [ ! -d gnulib ]; then
+    echo "$0: getting gnulib files..."

    trap cleanup_gnulib 1 2 13 15

-    cvs -z3 -q -d ${CVS_PREFIX}pserver.git.sv.gnu.org:/gnulib.git co -d gnulib HEAD ||
+    git clone --help|grep depth > /dev/null && shallow='--depth 2' || shallow=
+    git clone $shallow git://git.sv.gnu.org/gnulib ||
      cleanup_gnulib

    trap - 1 2 13 15
  fi
  GNULIB_SRCDIR=gnulib
+  ;;
+*)
+  # Redirect the gnulib submodule to the directory on the command line
+  # if possible.
+  if test -d "$GNULIB_SRCDIR"/.git && \
+        git_modules_config submodule.gnulib.url >/dev/null; then
+    git submodule init
+    GNULIB_SRCDIR=`cd $GNULIB_SRCDIR && pwd`
+    git_modules_config --replace-all submodule.gnulib.url $GNULIB_SRCDIR
+    echo "$0: getting gnulib files..."
+    git submodule update || exit $?
+    GNULIB_SRCDIR=gnulib
+  fi
+  ;;
 esac

 gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
@@ -342,13 +481,20 @@ update_po_files() {
    && ls "$ref_po_dir"/*.po 2>/dev/null |
      sed 's|.*/||; s|\.po$||' > "$po_dir/LINGUAS"

-  for po in `cd $ref_po_dir && echo *.po|sed 's/\.po//g'`; do
-     new_po="$ref_po_dir/$po.po"
-     cksum_file="$ref_po_dir/$po.s1"
-     if ! "$SHA1SUM" -c --status "$cksum_file" < "$new_po" > /dev/null; then
-       echo "updated $po_dir/$po.po..."
-       cp "$new_po" "$po_dir/$po.po" && "$SHA1SUM" < "$new_po" > "$cksum_file"
-     fi
+  langs=`cd $ref_po_dir && echo *.po|sed 's/\.po//g'`
+  test "$langs" = '*' && langs=x
+  for po in $langs; do
+    case $po in x) continue;; esac
+    new_po="$ref_po_dir/$po.po"
+    cksum_file="$ref_po_dir/$po.s1"
+    if ! test -f "$cksum_file" ||
+        ! test -f "$po_dir/$po.po" ||
+        ! $SHA1SUM -c --status "$cksum_file" \
+            < "$new_po" > /dev/null; then
+      echo "updated $po_dir/$po.po..."
+      cp "$new_po" "$po_dir/$po.po" \
+          && $SHA1SUM < "$new_po" > "$cksum_file"
+    fi
  done
 }

@@ -395,37 +541,37 @@ symlink_to_dir()

    if $copy; then
      {
-	test ! -h "$dst" || {
-	  echo "$0: rm -f $dst" &&
-	  rm -f "$dst"
-	}
+        test ! -h "$dst" || {
+          echo "$0: rm -f $dst" &&
+          rm -f "$dst"
+        }
      } &&
      test -f "$dst" &&
      cmp -s "$src" "$dst" || {
-	echo "$0: cp -fp $src $dst" &&
-	cp -fp "$src" "$dst"
+        echo "$0: cp -fp $src $dst" &&
+        cp -fp "$src" "$dst"
      }
    else
      test -h "$dst" &&
      src_ls=`ls -diL "$src" 2>/dev/null` && set $src_ls && src_i=$1 &&
      dst_ls=`ls -diL "$dst" 2>/dev/null` && set $dst_ls && dst_i=$1 &&
      test "$src_i" = "$dst_i" || {
-	dot_dots=
-	case $src in
-	/*) ;;
-	*)
-	  case /$dst/ in
-	  *//* | */../* | */./* | /*/*/*/*/*/)
-	     echo >&2 "$0: invalid symlink calculation: $src -> $dst"
-	     exit 1;;
-	  /*/*/*/*/)	dot_dots=../../../;;
-	  /*/*/*/)	dot_dots=../../;;
-	  /*/*/)	dot_dots=../;;
-	  esac;;
-	esac
+        dot_dots=
+        case $src in
+        /*) ;;
+        *)
+          case /$dst/ in
+          *//* | */../* | */./* | /*/*/*/*/*/)
+             echo >&2 "$0: invalid symlink calculation: $src -> $dst"
+             exit 1;;
+          /*/*/*/*/)	dot_dots=../../../;;
+          /*/*/*/)	dot_dots=../../;;
+          /*/*/)	dot_dots=../;;
+          esac;;
+        esac

-	echo "$0: ln -fs $dot_dots$src $dst" &&
-	ln -fs "$dot_dots$src" "$dst"
+        echo "$0: ln -fs $dot_dots$src $dst" &&
+        ln -fs "$dot_dots$src" "$dst"
      }
    fi
  }
@@ -450,9 +596,13 @@ cp_mark_as_generated()

    if test -z "$c1"; then
      cmp -s "$cp_src" "$cp_dst" || {
-	echo "$0: cp -f $cp_src $cp_dst" &&
-	rm -f "$cp_dst" &&
-	sed "s!$bt_regex/!!g" "$cp_src" > "$cp_dst"
+        # Copy the file first to get proper permissions if it
+        # doesn't already exist.  Then overwrite the copy.
+        echo "$0: cp -f $cp_src $cp_dst" &&
+        rm -f "$cp_dst" &&
+        cp "$cp_src" "$cp_dst-t" &&
+        sed "s!$bt_regex/!!g" "$cp_src" > "$cp_dst-t" &&
+        mv -f "$cp_dst-t" "$cp_dst"
      }
    else
      check_dst_dir "$cp_dst"
@@ -460,15 +610,15 @@ cp_mark_as_generated()
      # doesn't already exist.  Then overwrite the copy.
      cp "$cp_src" "$cp_dst-t" &&
      (
-	echo "$c1-*- buffer-read-only: t -*- vi: set ro:$c2" &&
-	echo "${c1}DO NOT EDIT! GENERATED AUTOMATICALLY!$c2" &&
-	sed "s!$bt_regex/!!g" "$cp_src"
+        echo "$c1-*- buffer-read-only: t -*- vi: set ro:$c2" &&
+        echo "${c1}DO NOT EDIT! GENERATED AUTOMATICALLY!$c2" &&
+        sed "s!$bt_regex/!!g" "$cp_src"
      ) > $cp_dst-t &&
      if cmp -s "$cp_dst-t" "$cp_dst"; then
-	rm -f "$cp_dst-t"
+        rm -f "$cp_dst-t"
      else
-	echo "$0: cp $cp_src $cp_dst # with edits" &&
-	mv -f "$cp_dst-t" "$cp_dst"
+        echo "$0: cp $cp_src $cp_dst # with edits" &&
+        mv -f "$cp_dst-t" "$cp_dst"
      fi
    fi
  fi
@@ -480,9 +630,11 @@ version_controlled_file() {
  found=no
  if test -d CVS; then
    grep -F "/$file/" $dir/CVS/Entries 2>/dev/null |
-	     grep '^/[^/]*/[0-9]' > /dev/null && found=yes
+             grep '^/[^/]*/[0-9]' > /dev/null && found=yes
  elif test -d .git; then
-    git-rm -n "$dir/$file" > /dev/null 2>&1 && found=yes
+    git rm -n "$dir/$file" > /dev/null 2>&1 && found=yes
+  elif test -d .svn; then
+    svn log -r HEAD "$dir/$file" > /dev/null 2>&1 && found=yes
  else
    echo "$0: no version control for $dir/$file?" >&2
  fi
@@ -500,35 +652,35 @@ slurp() {
      esac
      test -d $1/$dir/$file && continue
      for excluded_file in $excluded_files; do
-	test "$dir/$file" = "$excluded_file" && continue 2
+        test "$dir/$file" = "$excluded_file" && continue 2
      done
      if test $file = Makefile.am; then
-	copied=$copied${sep}$gnulib_mk; sep=$nl
-	remove_intl='/^[^#].*\/intl/s/^/#/;'"s!$bt_regex/!!g"
-	sed "$remove_intl" $1/$dir/$file | cmp -s - $dir/$gnulib_mk || {
-	  echo "$0: Copying $1/$dir/$file to $dir/$gnulib_mk ..." &&
-	  rm -f $dir/$gnulib_mk &&
-	  sed "$remove_intl" $1/$dir/$file >$dir/$gnulib_mk
-	}
+        copied=$copied${sep}$gnulib_mk; sep=$nl
+        remove_intl='/^[^#].*\/intl/s/^/#/;'"s!$bt_regex/!!g"
+        sed "$remove_intl" $1/$dir/$file | cmp - $dir/$gnulib_mk > /dev/null || {
+          echo "$0: Copying $1/$dir/$file to $dir/$gnulib_mk ..." &&
+          rm -f $dir/$gnulib_mk &&
+          sed "$remove_intl" $1/$dir/$file >$dir/$gnulib_mk
+        }
      elif { test "${2+set}" = set && test -r $2/$dir/$file; } ||
-	   version_controlled_file $dir $file; then
-	echo "$0: $dir/$file overrides $1/$dir/$file"
+           version_controlled_file $dir $file; then
+        echo "$0: $dir/$file overrides $1/$dir/$file"
      else
-	copied=$copied$sep$file; sep=$nl
-	if test $file = gettext.m4; then
-	  echo "$0: patching m4/gettext.m4 to remove need for intl/* ..."
-	  rm -f $dir/$file
-	  sed '
-	    /^AC_DEFUN(\[AM_INTL_SUBDIR],/,/^]/c\
-	      AC_DEFUN([AM_INTL_SUBDIR], [
-	    /^AC_DEFUN(\[gt_INTL_SUBDIR_CORE],/,/^]/c\
-	      AC_DEFUN([gt_INTL_SUBDIR_CORE], [])
-	    $a\
-	      AC_DEFUN([gl_LOCK_EARLY], [])
-	  ' $1/$dir/$file >$dir/$file
-	else
-	  cp_mark_as_generated $1/$dir/$file $dir/$file
-	fi
+        copied=$copied$sep$file; sep=$nl
+        if test $file = gettext.m4; then
+          echo "$0: patching m4/gettext.m4 to remove need for intl/* ..."
+          rm -f $dir/$file
+          sed '
+            /^AC_DEFUN(\[AM_INTL_SUBDIR],/,/^]/c\
+              AC_DEFUN([AM_INTL_SUBDIR], [
+            /^AC_DEFUN(\[gt_INTL_SUBDIR_CORE],/,/^]/c\
+              AC_DEFUN([gt_INTL_SUBDIR_CORE], [])
+            $a\
+              AC_DEFUN([gl_LOCK_EARLY], [])
+          ' $1/$dir/$file >$dir/$file
+        else
+          cp_mark_as_generated $1/$dir/$file $dir/$file
+        fi
      fi || exit
    done

@@ -536,18 +688,18 @@ slurp() {
      test $dot_ig = x && continue
      ig=$dir/$dot_ig
      if test -n "$copied"; then
-	insert_vc_ignore $ig "$copied"
-	# If an ignored file name ends with _.h, then also add
-	# the name with just ".h".  Many gnulib headers are generated,
-	# e.g., stdint_.h -> stdint.h, dirent_.h ->..., etc.
-	# Likewise for .gperf -> .h, .y -> .c, and .sin -> .sed
-	f=`echo "$copied"|sed 's/_\.h$/.h/;s/\.sin$/.sed/;s/\.y$/.c/;s/\.gperf$/.h/'`
-	insert_vc_ignore $ig "$f"
+        insert_vc_ignore $ig "$copied"
+        # If an ignored file name ends with .in.h, then also add
+        # the name with just ".h".  Many gnulib headers are generated,
+        # e.g., stdint.in.h -> stdint.h, dirent.in.h ->..., etc.
+        # Likewise for .gperf -> .h, .y -> .c, and .sin -> .sed
+        f=`echo "$copied"|sed 's/\.in\.h$/.h/;s/\.sin$/.sed/;s/\.y$/.c/;s/\.gperf$/.h/'`
+        insert_vc_ignore $ig "$f"

-	# For files like sys_stat_.h and sys_time_.h, record as
-	# ignorable the directory we might eventually create: sys/.
-	f=`echo "$copied"|sed 's/sys_.*_\.h$/sys/'`
-	insert_vc_ignore $ig "$f"
+        # For files like sys_stat.in.h and sys_time.in.h, record as
+        # ignorable the directory we might eventually create: sys/.
+        f=`echo "$copied"|sed 's/sys_.*\.in\.h$/sys/'`
+        insert_vc_ignore $ig "$f"
      fi
    done
  done
@@ -564,13 +716,13 @@ gnulib_tool_options="\
 --import\
 --no-changelog\
 --aux-dir $bt/$build_aux\
- --doc-base $bt/doc\
+ --doc-base $bt/$doc_base\
 --lib $gnulib_name\
- --m4-base $bt/m4/\
- --source-base $bt/lib/\
- --tests-base $bt/tests\
+ --m4-base $bt/$m4_base/\
+ --source-base $bt/$source_base/\
+ --tests-base $bt/$tests_base\
 --local-dir $local_gl_dir\
-$gnulib_tool_option_extras\
+ $gnulib_tool_option_extras\
 "
 echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
 $gnulib_tool $gnulib_tool_options --import $gnulib_modules &&
@@ -587,46 +739,50 @@ grep '^[	 ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null || \
    with_gettext=no

 if test $with_gettext = yes; then
-  echo "$0: (cd $bt2; autopoint) ..."
+  echo "$0: (cd $bt2; ${AUTOPOINT-autopoint}) ..."
  cp configure.ac $bt2 &&
-  (cd $bt2 && autopoint && rm configure.ac) &&
+  (cd $bt2 && ${AUTOPOINT-autopoint} && rm configure.ac) &&
  slurp $bt2 $bt || exit
-
-  rm -fr $bt $bt2 || exit
 fi
+rm -fr $bt $bt2 || exit

-# Coreutils is unusual in that it generates some of its test-related
-# Makefile.am files.  That must be done before invoking automake.
-mam_template=tests/Makefile.am.in
-if test -f $mam_template; then
-  PERL=perl
-  for tool in cut head join pr sort tac tail test tr uniq wc; do
-    m=tests/$tool/Makefile.am
-    t=${m}t
-    rm -f $m $t
-    sed -n '1,/^##test-files-begin/p' $mam_template > $t
-    echo "x = $tool" >> $t
-    srcdir=tests/$tool
-    $PERL -I$srcdir -w -- tests/mk-script $srcdir --list >> $t
-    sed -n '/^##test-files-end/,$p' $mam_template >> $t
-    chmod -w $t
-    mv $t $m
-  done
-fi
+# Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
+# gnulib-populated directories.  Such .m4 files would cause aclocal to fail.
+# The following requires GNU find 4.2.3 or newer.  Considering the usual
+# portability constraints of this script, that may seem a very demanding
+# requirement, but it should be ok.  Ignore any failure, which is fine,
+# since this is only a convenience to help developers avoid the relatively
+# unusual case in which a symlinked-to .m4 file is git-removed from gnulib
+# between successive runs of this script.
+find "$m4_base" "$source_base" \
+  -depth \( -name '*.m4' -o -name '*.[ch]' \) \
+  -type l -xtype l -delete > /dev/null 2>&1

 # Reconfigure, getting other files.

+# Skip autoheader if it's not needed.
+grep -E '^[	 ]*AC_CONFIG_HEADERS?\>' configure.ac >/dev/null ||
+  AUTOHEADER=true
+
 for command in \
  libtool \
-  'aclocal --force -I m4' \
-  'autoconf --force' \
-  'autoheader --force' \
-  'automake --add-missing --copy --force-missing';
+  "${ACLOCAL-aclocal} --force -I m4" \
+  "${AUTOCONF-autoconf} --force" \
+  "${AUTOHEADER-autoheader} --force" \
+  "${AUTOMAKE-automake} --add-missing --copy --force-missing"
 do
  if test "$command" = libtool; then
-    grep '^[	 ]*AM_PROG_LIBTOOL\>' configure.ac >/dev/null ||
-      continue
-    command='libtoolize -c -f'
+    use_libtool=0
+    # We'd like to use grep -E, to see if any of LT_INIT,
+    # AC_PROG_LIBTOOL, AM_PROG_LIBTOOL is used in configure.ac,
+    # but that's not portable enough (e.g., for Solaris).
+    grep '^[	 ]*A[CM]_PROG_LIBTOOL' configure.ac >/dev/null \
+      && use_libtool=1
+    grep '^[	 ]*LT_INIT' configure.ac >/dev/null \
+      && use_libtool=1
+    test $use_libtool = 0 \
+      && continue
+    command="${LIBTOOLIZE-libtoolize} -c -f"
  fi
  echo "$0: $command ..."
  $command || exit
@@ -649,11 +805,11 @@ if test $with_gettext = yes; then
  rm -f po/Makevars
  sed '
    /^EXTRA_LOCALE_CATEGORIES *=/s/=.*/= '"$EXTRA_LOCALE_CATEGORIES"'/
-    /^MSGID_BUGS_ADDRESS *=/s/=.*/= bug-'"$package"'@gnu.org/
+    /^MSGID_BUGS_ADDRESS *=/s/=.*/= '"$MSGID_BUGS_ADDRESS"'/
    /^XGETTEXT_OPTIONS *=/{
      s/$/ \\/
      a\
-	  '"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
+          '"$XGETTEXT_OPTIONS"' $${end_of_xgettext_options+}
    }
  ' po/Makevars.template >po/Makevars

@@ -665,9 +821,9 @@ if test $with_gettext = yes; then
      /^subdir *=.*/s/=.*/= runtime-po/
      /^MSGID_BUGS_ADDRESS *=/s/=.*/= bug-'"$package"'@gnu.org/
      /^XGETTEXT_OPTIONS *=/{
-	s/$/ \\/
-	a\
-	    '"$XGETTEXT_OPTIONS_RUNTIME"' $${end_of_xgettext_options+}
+        s/$/ \\/
+        a\
+            '"$XGETTEXT_OPTIONS_RUNTIME"' $${end_of_xgettext_options+}
      }
    ' <po/Makevars.template >runtime-po/Makevars

@@ -676,4 +832,10 @@ if test $with_gettext = yes; then
  fi
 fi

+bootstrap_epilogue
+
 echo "$0: done.  Now you can run './configure'."
+
+# Local Variables:
+# indent-tabs-mode: nil
+# End:
@@ -1,6 +1,6 @@
 # Bootstrap configuration.

-# Copyright (C) 2006, 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2006-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -17,12 +17,13 @@

 # gnulib modules used by this package.
 gnulib_modules='
-	announce-gen argmatch config-h c-strcase configmake
-	dirname error extensions fopen-safer getopt gettext git-version-gen
-	gnumakefile hash inttypes javacomp-script javaexec-script malloc
-	mbswidth obstack quote quotearg stdbool stpcpy strerror strtoul
-	strverscmp unistd unistd-safer unlocked-io unsetenv verify
-	warnings xalloc xalloc-die xstrndup
+  announce-gen argmatch assert config-h c-strcase configmake dirname
+  error extensions fopen-safer gendocs getopt-gnu gettext
+  git-version-gen hash inttypes javacomp-script javaexec-script
+  maintainer-makefile malloc mbswidth obstack pipe quote quotearg
+  stdbool stpcpy strerror strtoul strverscmp unistd unistd-safer
+  unlocked-io update-copyright unsetenv verify warnings xalloc
+  xalloc-die xstrndup
 '

 # Additional xgettext options to use.  Use "\\\newline" to break lines.
@@ -1,11 +1,13 @@
 Makefile
 Makefile.in
 announce-gen
+arg-nonnull.h
 compile
 config.guess
 config.rpath
 config.sub
 depcomp
+gendocs.sh
 git-version-gen
 install-sh
 javacomp.sh.in
@@ -14,4 +16,8 @@ link-warning.h
 mdate-sh
 missing
 texinfo.tex
+update-copyright
+useless-if-before-free
+vc-list-files
+warn-on-use.h
 ylwrap
@@ -1,11 +1,13 @@
 /Makefile
 /Makefile.in
 /announce-gen
+/arg-nonnull.h
 /compile
 /config.guess
 /config.rpath
 /config.sub
 /depcomp
+/gendocs.sh
 /git-version-gen
 /install-sh
 /javacomp.sh.in
@@ -14,4 +16,8 @@
 /mdate-sh
 /missing
 /texinfo.tex
+/update-copyright
+/useless-if-before-free
+/vc-list-files
+/warn-on-use.h
 /ylwrap
@@ -1,2 +1,2 @@
 ## Process this file with automake to produce Makefile.in -*-Makefile-*-
-EXTRA_DIST = prev-version.txt cross-options.pl
+EXTRA_DIST = prev-version.txt cross-options.pl update-b4-copyright
@@ -7,22 +7,33 @@ use strict;
 my %option;
 while (<>)
 {
-    if (/^\s*          # Initial spaces.
-        (?:(-\w),\s+)? # $1: Possible short option.
-        (--[-\w]+)     # $2: Long option.
-        (\[?)          # $3: '[' iff the argument is optional.
-        (?:=([-\w]+))? # $4: Possible argument name.
+    if (/^\s*             # Initial spaces.
+        (?:(-\w),\s+)?    # $1: $short: Possible short option.
+        (--[-\w]+)        # $2: $long:  Long option.
+        (\[?)             # $3: $opt:   '[' iff the argument is optional.
+        (?:=(\S+))?       # $4: $arg:   Possible argument name.
+        \s                # Spaces.
        /x)
    {
 	my ($short, $long, $opt, $arg) = ($1, $2, $3, $4);
 	$short = defined $short ? '@option{' . $short . '}' : '';
 	if ($arg)
 	{
+            # if $opt, $arg contains the closing ].
+            substr ($arg, -1) = ''
+                if $opt eq '[';
 	    $arg =~ s/^=//;
-	    $arg = '@var{' . lc ($arg) . '}';
-	    $arg = '[' . $arg . ']'
-		if $opt eq '[';
-	    $option{"$long=$arg"} = $short ? "$short $arg" : '';
+            $arg = lc ($arg);
+            # If the argument is compite (e.g., for --define[=NAME[=VALUE]]),
+            # put each word in @var, to build @var{name}[=@var{value}], not
+            # @var{name[=value]}].
+	    $arg =~ s/(\w+)/\@var{$1}/g;
+	    my $long_arg = "=$arg";
+	    if ($opt eq '[') {
+	      $long_arg = "[$long_arg]";
+	      $arg = "[$arg]";
+	    }
+	    $option{"$long$long_arg"} = $short ? "$short $arg" : '';
 	}
 	else
 	{
@@ -33,5 +44,8 @@ while (<>)

 foreach my $long (sort keys %option)
 {
-    printf "\@item %-40s \@tab %s\n", '@option{' . $long . '}', $option{$long};
+    # Avoid trailing spaces.
+    printf ("\@item %-40s \@tab%s\n",
+            '@option{' . $long . '}',
+            $option{$long} ? " $option{$long}" : "");
 }
@@ -0,0 +1,152 @@
+#!/usr/bin/perl -0777 -pi
+
+# Update b4_copyright invocations or b4_copyright_years definitions to
+# include the current year.
+
+# Copyright (C) 2009-2010 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+use strict;
+use warnings;
+
+my $margin = 72;
+
+my $this_year = $ENV{UPDATE_COPYRIGHT_YEAR};
+if (!$this_year || $this_year !~ m/^\d{4}$/)
+  {
+    my ($sec, $min, $hour, $mday, $month, $year) = localtime (time ());
+    $this_year = $year + 1900;
+  }
+my $old_re = <<'EOF'
+  (
+    (?:^|\n)
+    #BEFORE
+    (?:
+      b4_copyright\(\[[^][]*]
+      | m4_(?:push|pop)def\(\[b4_copyright_years]
+    )
+    #AFTER
+  )
+  (?:
+    ,\s*
+    (
+      \[\s* (?:\d{4}(?:,\s*|-))* (\d{4}) \s*]
+    )
+  )?
+  \)
+EOF
+  ;
+
+while (/($old_re)/gx)
+  {
+    my $start = pos() - length ($1);
+    my $b4_copyright_line = $2;
+    my $year_lines = $3;
+    my $final_year = $4;
+    $year_lines .= ')';
+
+    # If there was a second argument, it contains years, so update them.
+    if ($final_year)
+      {
+        $b4_copyright_line .= ',';
+        if ($final_year != $this_year)
+          {
+            # Update the year.
+            $year_lines =~ s/$final_year/$final_year, $this_year/;
+          }
+
+        # Normalize all whitespace.
+        $year_lines =~ s/\s+/ /g;
+
+        # Put spaces after commas.
+        $year_lines =~ s/, ?/, /g;
+
+        # Compress to intervals.
+        $year_lines =~
+          s/
+            (\d{4})
+            (?:
+              (,\ |-)
+              ((??{
+                if    ($2 eq '-') { '\d{4}'; }
+                elsif (!$3)       { $1 + 1;  }
+                else              { $3 + 1;  }
+              }))
+            )+
+          /$1-$3/gx;
+
+        # Format within margin.
+        my $year_lines_new;
+        my $indent = index ($b4_copyright_line, '[');
+        --$indent if ($b4_copyright_line =~ m/^\n/);
+        while (length $year_lines)
+          {
+            my $text_margin = $margin - $indent;
+            if (($year_lines =~ s/^(.{1,$text_margin})(?: |$)//)
+                || ($year_lines =~ s/^([\S]+)(?: |$)//))
+              {
+                my $line = "\n" . (' 'x$indent) . $1;
+                ++$indent if (!$year_lines_new);
+                $year_lines_new .= $line;
+              }
+            else
+              {
+                # Should be unreachable, but we don't want an infinite
+                # loop if it can be reached.
+                die;
+              }
+          }
+
+        # Replace the old invocation.  Should never die.
+        die if (!s/$old_re\G/$b4_copyright_line$year_lines_new/x);
+
+        # Prepare for the next search.
+        pos () = $start + length ("$b4_copyright_line$year_lines_new");
+      }
+  }
+
+while (/(\bb4_copyright\()/g)
+  {
+    my $start = pos () - length ($1);
+    my $end = pos ();
+    my $re = $old_re;
+    pos () = $start;
+    $re =~ s/\#BEFORE/\\G/;
+    if (!/$re/x)
+      {
+        my $line = (substr ($_, 0, $start) =~ s/\n/\n/g) + 1;
+        print STDERR
+          "$ARGV:$line: warning: failed to update a b4_copyright\n";
+      }
+    pos () = $end;
+  }
+
+while (/(\[b4_copyright_years])/g)
+  {
+    my $start = pos () - length ($1);
+    my $end = pos ();
+    my $re = $old_re;
+    $re =~ s/\#AFTER/\\G/;
+    if (!/$re/x)
+      {
+        # The substr operation blows away pos (), so restoring pos ()
+        # at the end is necessary.
+        my $line = (substr ($_, 0, $start) =~ s/\n/\n/g) + 1;
+        print STDERR
+          "$ARGV:$line: warning: failed to update a"
+          . " b4_copyright_years\n";
+      }
+    pos () = $end;
+  }
@@ -0,0 +1,49 @@
+#!/usr/bin/perl -0777 -pi
+
+# In configure.ac, update PACKAGE_COPYRIGHT_YEAR to the current year.
+
+# Copyright (C) 2010 Free Software Foundation, Inc.
+#
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3, or (at your option)
+# any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+use strict;
+use warnings;
+
+my $this_year = $ENV{UPDATE_COPYRIGHT_YEAR};
+if (!$this_year || $this_year !~ m/^\d{4}$/)
+  {
+    my ($sec, $min, $hour, $mday, $month, $year) = localtime (time ());
+    $this_year = $year + 1900;
+  }
+my $old_re = <<'EOF'
+  (
+    MACRO\(
+    \[PACKAGE_COPYRIGHT_YEAR],
+    \s*\[
+  )
+  (\d{4})
+  (?=])
+EOF
+  ;
+foreach my $macro ("AC_DEFINE", "AC_SUBST")
+  {
+    my $this_old_re = $old_re;
+    $this_old_re =~ s/MACRO/$macro/;
+    if (!s/$this_old_re/$1$this_year/x)
+      {
+        print STDERR
+          "$ARGV: warning: failed to update PACKAGE_COPYRIGHT_YEAR in"
+          . " $macro.\n";
+      }
+  }
@@ -1,5 +1,5 @@
 # Customize maint.mk                           -*- makefile -*-
-# Copyright (C) 2008 Free Software Foundation, Inc.
+# Copyright (C) 2008-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -39,4 +39,10 @@ local-checks-to-skip = changelog-check

 # The local directory containing the checked-out copy of gnulib used in
 # this release.  Used solely to get a date for the "announcement" target.
-gnulib_dir = $(srcdir)/../../gnulib
+gnulib_dir = $(srcdir)/gnulib
+
+bootstrap-tools = autoconf,automake,flex,gnulib
+
+update-copyright: update-b4-copyright update-package-copyright-year
+update-copyright-env = \
+  UPDATE_COPYRIGHT_FORCE=1 UPDATE_COPYRIGHT_USE_INTERVALS=1
@@ -1,7 +1,6 @@
 # Configure template for GNU Bison.                   -*-Autoconf-*-
 #
-# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
-# Foundation, Inc.
+# Copyright (C) 2001-2010 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -22,19 +21,24 @@ AC_PREREQ(2.61)
 AC_INIT([GNU Bison],
        m4_esyscmd([build-aux/git-version-gen .tarball-version]),
        [[email protected]])
-AC_DEFINE([PACKAGE_COPYRIGHT_YEAR], [2008],
+AC_DEFINE([PACKAGE_COPYRIGHT_YEAR], [2010],
          [The copyright year for this package])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2008])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2010])

 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])

-# We don't have a file m4/Makefile.am, so we need Automake 1.8 or later.
+# Automake 1.10.3 and 1.11.1 fix a security flaw discussed here:
+#
+#   http://thread.gmane.org/gmane.comp.sysutils.autotools.announce/131
+#
+# To avoid 1.11, we make 1.11.1 the minimum version.
+#
 # We want gnits strictness only when rolling a formal release so that we can,
 # for example, run make dist at other times without being required to add a
 # bogus NEWS entry.
-AM_INIT_AUTOMAKE([1.8 dist-bzip2]
-                 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [-], [gnu], [gnits]))
+AM_INIT_AUTOMAKE([1.11.1 dist-bzip2]
+                 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [-], [gnu], [gnu]))
 AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])

 # Checks for the compiler.
@@ -68,6 +72,12 @@ if test "${enableval}" = yes; then
  gl_WARN_ADD([-Wshadow])
  gl_WARN_ADD([-Wstrict-prototypes])
  AC_SUBST([WARN_CFLAGS])
+  # Warnings for the test suite only.
+  gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST])
+  WARN_CXXFLAGS_TEST="$WARN_CXXFLAGS $WARN_CFLAGS_TEST"
+  WARN_CFLAGS_TEST="$WARN_CFLAGS $WARN_CFLAGS_TEST"
+  AC_SUBST([WARN_CXXFLAGS_TEST])
+  AC_SUBST([WARN_CFLAGS_TEST])
  AC_DEFINE([lint], 1, [Define to 1 if the compiler is checking for lint.])
 fi

@@ -92,11 +102,10 @@ AC_SUBST([YACC_LIBRARY])
 AC_PROG_LEX
 AC_PROG_YACC
 AC_PROG_RANLIB
-BISON_PROG_GNU_M4
-if test x"$ac_cv_prog_gnu_m4" != xyes; then
-  AC_MSG_ERROR([GNU M4 1.4 is required])
-fi
+AC_PROG_GNU_M4
 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
+AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
+supports -g, otherwise to "".])
 AM_MISSING_PROG([HELP2MAN], [help2man])
 AC_PATH_PROG([XSLTPROC], [xsltproc])
 AC_SUBST([XSLTPROC])
@@ -119,7 +128,7 @@ BISON_PREREQ_TIMEVAR

 # Gettext.
 # We've never tested with gettext versions before 0.15, so play it safe.
-AM_GNU_GETTEXT([external], [need-formatstring-macros])
+AM_GNU_GETTEXT([external], [need-ngettext])
 AM_GNU_GETTEXT_VERSION([0.15])
 BISON_I18N

@@ -1,4 +1,4 @@
-## Copyright (C) 2002, 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+## Copyright (C) 2002, 2005-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -52,7 +52,7 @@ into various formats.

 -----

-Copyright (C) 2002, 2008 Free Software Foundation, Inc.
+Copyright (C) 2002, 2008-2010 Free Software Foundation, Inc.

 This file is part of GNU Bison.

@@ -1,8 +1,7 @@
                                                            -*- Autoconf -*-

 # Language-independent M4 Macros for Bison.
-# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
-# Inc.
+# Copyright (C) 2002, 2004-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -464,10 +463,9 @@ m4_define([b4_percent_define_default],
 [m4_ifndef([b4_percent_define(]$1[)],
           [m4_define([b4_percent_define(]$1[)], [$2])dnl
            m4_define([b4_percent_define_loc(]$1[)],
-                      [[[[[Bison:b4_percent_define_default]:1.0]], [[[Bison:b4_percent_define_default]:1.0]]]])dnl
-            m4_define([b4_percent_define_syncline(]$1[)],
-                      [[]b4_syncline(1, [["[Bison:b4_percent_define_default]"]])[
-]])])])
+                      [[[[<skeleton default value>:-1.-1]],
+                        [[<skeleton default value>:-1.-1]]]])dnl
+            m4_define([b4_percent_define_syncline(]$1[)], [[]])])])

 # b4_percent_define_check_values(VALUES)
 # --------------------------------------
@@ -1,7 +1,7 @@
                                                            -*- Autoconf -*-

 # C++ skeleton dispatching for Bison.
-# Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2006-2007, 2009-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -2,8 +2,7 @@

 # C++ skeleton for Bison

-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation,
-# Inc.
+# Copyright (C) 2002-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -74,7 +73,7 @@ m4_define([b4_namespace_open],

 m4_define([b4_namespace_close],
 [b4_user_code([b4_percent_define_get_syncline([[namespace]])
-m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref),
+m4_bpatsubst(m4_dquote(m4_bpatsubst(m4_dquote(b4_namespace_ref[ ]),
                                    [^\(.\)[	 ]*\(::\)?\([^][:]\|:[^][:]\)*],
                                    [\1])),
             [::\([^][:]\|:[^][:]\)*], [} ])[} // ]b4_namespace_ref])])
@@ -1,7 +1,7 @@
                                                            -*- Autoconf -*-

 # C skeleton dispatching for Bison.
-# Copyright (C) 2006, 2007 Free Software Foundation, Inc.
+# Copyright (C) 2006-2007, 2009-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,8 +1,7 @@
                                                            -*- Autoconf -*-

 # C M4 Macros for Bison.
-# Copyright (C) 2002, 2004, 2005, 2006, 2007, 2008 Free Software
-# Foundation, Inc.
+# Copyright (C) 2002, 2004-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,8 +1,7 @@
                                                                    -*- C -*-

 # GLR skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
-# Foundation, Inc.
+# Copyright (C) 2002-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -148,9 +147,9 @@ m4_define([b4_rhs_location],
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert_push(0)dnl
-@output(b4_parser_file_name@)
+@output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison GLR parsers in C],
-  [2002, 2003, 2004, 2005, 2006])
+             [2002-2006, 2009-2010])
 [
 /* C GLR parser skeleton written by Paul Hilfinger.  */

@@ -248,7 +247,7 @@ b4_percent_code_get[]dnl
 #include <string.h>

 #ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
@@ -310,7 +309,8 @@ b4_percent_code_get[]dnl
 #ifndef __attribute__
 /* This feature is available in gcc versions 2.5 and later.  */
 # if (! defined __GNUC__ || __GNUC__ < 2 \
-      || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__)
+      || (__GNUC__ == 2 && __GNUC_MINOR__ < 5) \
+      || (defined __STRICT_ANSI__ && __STRICT_ANSI__))
 #  define __attribute__(Spec) /* empty */
 # endif
 #endif
@@ -2323,7 +2323,7 @@ yyrecoverSyntaxError (yyGLRStack* yystackp]b4_user_formals[)
  yychar = YYEMPTY;
  yylval = yyval_default;
 ]b4_locations_if([
-#if YYLTYPE_IS_TRIVIAL
+#if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
  yylloc.first_line   = yylloc.last_line   = ]b4_location_initial_line[;
  yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
 #endif
@@ -2637,9 +2637,9 @@ dnl glr.cc produces its own header.
 dnl
 m4_if(b4_skeleton, ["glr.c"],
 [b4_defines_if(
-[@output(b4_spec_defines_file@)
+[@output(b4_spec_defines_file@)@
 b4_copyright([Skeleton interface for Bison GLR parsers in C],
-  [2002, 2003, 2004, 2005, 2006])
+             [2002-2006, 2009-2010])

 b4_shared_declarations

@@ -1,8 +1,7 @@
                                                                    -*- C -*-

 # C++ GLR skeleton for Bison
-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
-# Inc.
+# Copyright (C) 2002-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -217,9 +216,9 @@ m4_include(b4_pkgdatadir/[glr.c])
 m4_popdef([b4_parse_param])

 m4_divert_push(0)
-@output(b4_spec_defines_file@)
+@output(b4_spec_defines_file@)@
 b4_copyright([Skeleton interface for Bison GLR parsers in C++],
-  [2002, 2003, 2004, 2005, 2006])[
+             [2002-2006, 2009-2010])[

 /* C++ GLR parser skeleton written by Akim Demaille.  */

@@ -1,7 +1,7 @@
                                                            -*- Autoconf -*-

 # Java skeleton dispatching for Bison.
-# Copyright (C) 2007 Free Software Foundation, Inc.
+# Copyright (C) 2007, 2009-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -2,7 +2,7 @@

 # Java language support for Bison

-# Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2007-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,7 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007, 2008
-# Free Software Foundation, Inc.
+# Copyright (C) 2002-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -33,9 +32,9 @@ m4_include(b4_pkgdatadir/[location.cc])
 m4_changecom()
 m4_divert_push(0)dnl
 b4_defines_if(
-[@output(b4_spec_defines_file@)
+[@output(b4_spec_defines_file@)@
 b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++],
-             [2002, 2003, 2004, 2005, 2006, 2007, 2008])
+             [2002-2010])
 dnl FIXME: This is wrong, we want computed header guards.
 [
 /* C++ LALR(1) parser skeleton written by Akim Demaille.  */
@@ -298,9 +297,9 @@ b4_percent_code_get([[provides]])[]dnl

 [#endif /* ! defined PARSER_HEADER_H */]
 ])dnl
-@output(b4_parser_file_name@)
+@output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++],
-             [2002, 2003, 2004, 2005, 2006, 2007, 2008])
+             [2002-2010])
 b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 [
@@ -318,7 +317,7 @@ b4_defines_if([[
 b4_percent_code_get[]dnl

 [#ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* FIXME: INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
@@ -1055,9 +1054,9 @@ b4_error_verbose_if([, int tok])[)

 ]b4_epilogue
 dnl
-@output(b4_dir_prefix[]stack.hh@)
+@output(b4_dir_prefix[]stack.hh@)@
 b4_copyright([Stack handling for Bison parsers in C++],
-             [2002, 2003, 2004, 2005, 2006, 2007, 2008])[
+             [2002-2010])[

 #ifndef BISON_STACK_HH
 # define BISON_STACK_HH
@@ -1,6 +1,6 @@
 # Java skeleton for Bison -*- autoconf -*-

-# Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2007-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -23,9 +23,9 @@ m4_ifval(m4_defn([b4_symbol_destructors]),
        [])

 m4_divert_push(0)dnl
-@output(b4_parser_file_name@)
+@output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
-  [2007, 2008])
+             [2007-2010])

 b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
 ])[/* First part of user declarations.  */
@@ -130,7 +130,7 @@ b4_token_enums(b4_tokens)
    /**
     * Entry point for the scanner.  Returns the token identifier corresponding
     * to the next token and prepares to return the semantic value
-     * ]b4_locations_if([and beginning/ending positions ])[of the token. 
+     * ]b4_locations_if([and beginning/ending positions ])[of the token.
     * @@return the token identifier corresponding to the next token. */
    int yylex () ]b4_maybe_throws([b4_lex_throws])[;

@@ -228,11 +228,11 @@ b4_lexer_if([[

    public int size = 16;
    public int height = -1;
-    
+
    public final void push (int state, ]b4_yystype[ value]dnl
-    	   	      	    b4_locations_if([, ]b4_location_type[ loc])[) {
+			    b4_locations_if([, ]b4_location_type[ loc])[) {
      height++;
-      if (size == height) 
+      if (size == height)
        {
 	  int[] newStateStack = new int[size * 2];
 	  System.arraycopy (stateStack, 0, newStateStack, 0, height);
@@ -241,7 +241,7 @@ b4_lexer_if([[
 	  ]b4_location_type[[] newLocStack = new ]b4_location_type[[size * 2];
 	  System.arraycopy (locStack, 0, newLocStack, 0, height);
 	  locStack = newLocStack;]])
-	  
+
 	  b4_yystype[[] newValueStack = new ]b4_yystype[[size * 2];
 	  System.arraycopy (valueStack, 0, newValueStack, 0, height);
 	  valueStack = newValueStack;
@@ -283,7 +283,7 @@ b4_lexer_if([[
    public void print (java.io.PrintStream out)
    {
      out.print ("Stack now");
-      
+
      for (int i = 0; i < height; i++)
        {
 	  out.print (' ');
@@ -310,7 +310,8 @@ b4_lexer_if([[

  /**
   * Returned by a Bison action in order to print an error message and start
-   * error recovery.  */
+   * error recovery.  Formally deprecated in Bison 2.4.2's NEWS entry, where
+   * a plan to phase it out is discussed.  */
  public static final int YYFAIL = 3;

  private static final int YYNEWSTATE = 4;
@@ -337,7 +338,7 @@ b4_lexer_if([[

    /* If YYLEN is nonzero, implement the default value of the action:
       `$$ = $1'.  Otherwise, use the top of the stack.
-    
+
       Otherwise, the following line sets YYVAL to garbage.
       This behavior is undocumented and Bison
       users should not rely upon it.  */
@@ -345,7 +346,7 @@ b4_lexer_if([[
      yyval = yystack.valueAt (yylen - 1);
    else
      yyval = yystack.valueAt (0);
-    
+
    yy_reduce_print (yyn, yystack);

    switch (yyn)
@@ -482,11 +483,11 @@ m4_popdef([b4_at_dollar])])dnl
        yycdebug ("Entering state " + yystate + "\n");
        if (yydebug > 0)
          yystack.print (yyDebugStream);
-    
+
        /* Accept?  */
        if (yystate == yyfinal_)
          return true;
-    
+
        /* Take a decision.  First try without lookahead.  */
        yyn = yypact_[yystate];
        if (yyn == yypact_ninf_)
@@ -494,7 +495,7 @@ m4_popdef([b4_at_dollar])])dnl
            label = YYDEFAULT;
 	    break;
          }
-    
+
        /* Read a lookahead token.  */
        if (yychar == yyempty_)
          {
@@ -502,10 +503,10 @@ m4_popdef([b4_at_dollar])])dnl
 	    yychar = yylex ();]
            b4_locations_if([[
 	    yylloc = new ]b4_location_type[(yylexer.getStartPos (),
-	    		   	            yylexer.getEndPos ());]])
+				            yylexer.getEndPos ());]])
            yylval = yylexer.getLVal ();[
          }
-    
+
        /* Convert token to internal form.  */
        if (yychar <= EOF)
          {
@@ -516,15 +517,15 @@ m4_popdef([b4_at_dollar])])dnl
          {
 	    yytoken = yytranslate_ (yychar);
 	    yy_symbol_print ("Next token is", yytoken,
-	    		     yylval]b4_locations_if([, yylloc])[);
+			     yylval]b4_locations_if([, yylloc])[);
          }
-    
+
        /* If the proper action on seeing token YYTOKEN is to reduce or to
           detect an error, take that action.  */
        yyn += yytoken;
        if (yyn < 0 || yylast_ < yyn || yycheck_[yyn] != yytoken)
          label = YYDEFAULT;
-    
+
        /* <= 0 means reduce or error.  */
        else if ((yyn = yytable_[yyn]) <= 0)
          {
@@ -536,27 +537,27 @@ m4_popdef([b4_at_dollar])])dnl
 	        label = YYREDUCE;
 	      }
          }
-    
+
        else
          {
            /* Shift the lookahead token.  */
 	    yy_symbol_print ("Shifting", yytoken,
-	    		     yylval]b4_locations_if([, yylloc])[);
-    
+			     yylval]b4_locations_if([, yylloc])[);
+
            /* Discard the token being shifted.  */
            yychar = yyempty_;
-    
+
            /* Count tokens shifted since error; after three, turn off error
               status.  */
            if (yyerrstatus_ > 0)
              --yyerrstatus_;
-    
+
            yystate = yyn;
            yystack.push (yystate, yylval]b4_locations_if([, yylloc])[);
            label = YYNEWSTATE;
          }
        break;
-    
+
      /*-----------------------------------------------------------.
      | yydefault -- do the default action for the current state.  |
      `-----------------------------------------------------------*/
@@ -567,7 +568,7 @@ m4_popdef([b4_at_dollar])])dnl
        else
          label = YYREDUCE;
        break;
-    
+
      /*-----------------------------.
      | yyreduce -- Do a reduction.  |
      `-----------------------------*/
@@ -576,7 +577,7 @@ m4_popdef([b4_at_dollar])])dnl
        label = yyaction (yyn, yystack, yylen);
 	yystate = yystack.stateAt (0);
        break;
-    
+
      /*------------------------------------.
      | yyerrlab -- here on detecting error |
      `------------------------------------*/
@@ -587,13 +588,13 @@ m4_popdef([b4_at_dollar])])dnl
 	    ++yynerrs_;
 	    yyerror (]b4_locations_if([yylloc, ])[yysyntax_error (yystate, yytoken));
          }
-    
+
        ]b4_locations_if([yyerrloc = yylloc;])[
        if (yyerrstatus_ == 3)
          {
 	    /* If just tried and failed to reuse lookahead token after an
 	     error, discard it.  */
-    
+
 	    if (yychar <= EOF)
 	      {
 	      /* Return failure if at end of input.  */
@@ -603,17 +604,17 @@ m4_popdef([b4_at_dollar])])dnl
 	    else
 	      yychar = yyempty_;
          }
-    
+
        /* Else will try to reuse lookahead token after shifting the error
           token.  */
        label = YYERRLAB1;
        break;
-    
+
      /*---------------------------------------------------.
      | errorlab -- error raised explicitly by YYERROR.  |
      `---------------------------------------------------*/
      case YYERROR:
-    
+
        ]b4_locations_if([yyerrloc = yystack.locationAt (yylen - 1);])[
        /* Do not reclaim the symbols of the rule which action triggered
           this YYERROR.  */
@@ -622,13 +623,13 @@ m4_popdef([b4_at_dollar])])dnl
        yystate = yystack.stateAt (0);
        label = YYERRLAB1;
        break;
-    
+
      /*-------------------------------------------------------------.
      | yyerrlab1 -- common code for both syntax error and YYERROR.  |
      `-------------------------------------------------------------*/
      case YYERRLAB1:
        yyerrstatus_ = 3;	/* Each real token shifted decrements this.  */
-    
+
        for (;;)
          {
 	    yyn = yypact_[yystate];
@@ -642,18 +643,18 @@ m4_popdef([b4_at_dollar])])dnl
 		      break;
 	          }
 	      }
-    
+
 	    /* Pop the current state because it cannot handle the error token.  */
 	    if (yystack.height == 1)
 	      return false;
-    
+
 	    ]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
 	    yystack.pop ();
 	    yystate = yystack.stateAt (0);
 	    if (yydebug > 0)
 	      yystack.print (yyDebugStream);
          }
-    
+
 	]b4_locations_if([
 	/* Muck with the stack to setup for yylloc.  */
 	yystack.push (0, null, yylloc);
@@ -664,16 +665,16 @@ m4_popdef([b4_at_dollar])])dnl
        /* Shift the error token.  */
        yy_symbol_print ("Shifting", yystos_[yyn],
 			 yylval]b4_locations_if([, yyloc])[);
-    
+
        yystate = yyn;
 	yystack.push (yyn, yylval]b4_locations_if([, yyloc])[);
        label = YYNEWSTATE;
        break;
-    
+
        /* Accept.  */
      case YYACCEPT:
        return true;
-    
+
        /* Abort.  */
      case YYABORT:
        return false;
@@ -842,7 +843,7 @@ m4_popdef([b4_at_dollar])])dnl
    for (int yyi = 0; yyi < yynrhs; yyi++)
      yy_symbol_print ("   $" + (yyi + 1) + " =",
 		       yyrhs_[yyprhs_[yyrule] + yyi],
-		       ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([, 
+		       ]b4_rhs_value(yynrhs, yyi + 1)b4_locations_if([,
 		       b4_rhs_location(yynrhs, yyi + 1)])[);
  }

@@ -1,7 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software Foundation,
-# Inc.
+# Copyright (C) 2002-2007, 2009-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -19,9 +18,9 @@
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert_push(0)dnl
-@output(b4_dir_prefix[]position.hh@)
+@output(b4_dir_prefix[]position.hh@)@
 b4_copyright([Positions for Bison parsers in C++],
-  [2002, 2003, 2004, 2005, 2006])[
+             [2002-2007, 2009-2010])[

 /**
 ** \file position.hh
@@ -116,10 +115,11 @@ b4_copyright([Positions for Bison parsers in C++],
  inline bool
  operator== (const position& pos1, const position& pos2)
  {
-    return
-      (pos1.filename == pos2.filename
-       || pos1.filename && pos2.filename && *pos1.filename == *pos2.filename)
-      && pos1.line == pos2.line && pos1.column == pos2.column;
+    return (pos1.line == pos2.line
+            && pos1.column == pos2.column
+            && (pos1.filename == pos2.filename
+                || (pos1.filename && pos2.filename
+                    && *pos1.filename == *pos2.filename)));
  }

  /// Compare two position objects.
@@ -143,9 +143,9 @@ b4_copyright([Positions for Bison parsers in C++],

 ]b4_namespace_close[
 #endif // not BISON_POSITION_HH]
-@output(b4_dir_prefix[]location.hh@)
+@output(b4_dir_prefix[]location.hh@)@
 b4_copyright([Locations for Bison parsers in C++],
-  [2002, 2003, 2004, 2005, 2006])[
+             [2002-2007, 2009-2010])[

 /**
 ** \file location.hh
@@ -3,7 +3,7 @@
 <!--
    bison.xsl - common templates for Bison XSLT.

-    Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+    Copyright (C) 2007-2010 Free Software Foundation, Inc.

    This file is part of Bison, the GNU Compiler Compiler.

@@ -3,7 +3,7 @@
 <!--
    xml2dot.xsl - transform Bison XML Report into DOT.

-    Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+    Copyright (C) 2007-2010 Free Software Foundation, Inc.

    This file is part of Bison, the GNU Compiler Compiler.

@@ -3,7 +3,7 @@
 <!--
    xml2text.xsl - transform Bison XML Report into plain text.

-    Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+    Copyright (C) 2007-2010 Free Software Foundation, Inc.

    This file is part of Bison, the GNU Compiler Compiler.

@@ -3,7 +3,7 @@
 <!--
    xml2html.xsl - transform Bison XML Report into XHTML.

-    Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+    Copyright (C) 2007-2010 Free Software Foundation, Inc.

    This file is part of Bison, the GNU Compiler Compiler.

@@ -2,8 +2,8 @@

 # Yacc compatible skeleton for Bison

-# Copyright (C) 1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006,
-# 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 1984, 1989-1990, 2000-2010 Free Software Foundation,
+# Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -153,9 +153,9 @@ m4_define([b4_rhs_location],
 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
 m4_divert_push(0)dnl
-@output(b4_parser_file_name@)
-b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],dnl '
-  [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])[
+@output(b4_parser_file_name@)@
+b4_copyright([Skeleton implementation for Bison's Yacc-like parsers in C],
+             [1984, 1989-1990, 2000-2006, 2009-2010])[

 /* C LALR(1) parser skeleton written by Richard Stallman, by
   simplifying the original so-called "semantic" parser.  */
@@ -310,7 +310,7 @@ typedef short int yytype_int16;
 #define YYSIZE_MAXIMUM ((YYSIZE_T) -1)

 #ifndef YY_
-# if YYENABLE_NLS
+# if defined YYENABLE_NLS && YYENABLE_NLS
 #  if ENABLE_NLS
 #   include <libintl.h> /* INFRINGES ON USER NAME SPACE */
 #   define YY_(msgid) dgettext ("bison-runtime", msgid)
@@ -609,9 +609,18 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =

 /* Like YYERROR except do call yyerror.  This remains here temporarily
   to ease the transition to the new meaning of YYERROR, for GCC.
-   Once GCC version 2 has supplanted version 1, this can go.  */
+   Once GCC version 2 has supplanted version 1, this can go.  However,
+   YYFAIL appears to be in use.  Nevertheless, it is formally deprecated
+   in Bison 2.4.2's NEWS entry, where a plan to phase it out is
+   discussed.  */

 #define YYFAIL		goto yyerrlab
+#if defined YYFAIL
+  /* This is here to suppress warnings from the GCC cpp's
+     -Wunused-macros.  Normally we don't worry about that warning, but
+     some users do, and we want to make it easy for users to remove
+     YYFAIL uses, which will produce warnings from Bison 2.5.  */
+#endif

 #define YYRECOVERING()  (!!yyerrstatus)

@@ -668,7 +677,7 @@ while (YYID (0))
   we won't break user code: when these are the locations we know.  */

 #ifndef YY_LOCATION_PRINT
-# if YYLTYPE_IS_TRIVIAL
+# if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
 #  define YY_LOCATION_PRINT(File, Loc)			\
     fprintf (File, "%d.%d-%d.%d",			\
 	      (Loc).first_line, (Loc).first_column,	\
@@ -1234,7 +1243,7 @@ b4_push_if([b4_pure_if([], [[  int yypushed_char = yychar;
  yyvsp = yyvs;]b4_locations_if([[
  yylsp = yyls;

-#if YYLTYPE_IS_TRIVIAL
+#if defined YYLTYPE_IS_TRIVIAL && YYLTYPE_IS_TRIVIAL
  /* Initialize the default location before parsing starts.  */
  yylloc.first_line   = yylloc.last_line   = ]b4_location_initial_line[;
  yylloc.first_column = yylloc.last_column = ]b4_location_initial_column[;
@@ -1674,9 +1683,9 @@ yypushreturn:

 ]b4_epilogue
 b4_defines_if(
-[@output(b4_spec_defines_file@)
-b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],dnl '
-  [1984, 1989, 1990, 2000, 2001, 2002, 2003, 2004, 2005, 2006])
+[@output(b4_spec_defines_file@)@
+b4_copyright([Skeleton interface for Bison's Yacc-like parsers in C],
+             [1984, 1989-1990, 2000-2006, 2009-2010])

 b4_percent_code_get([[requires]])[]dnl

@@ -1,7 +1,7 @@
 # DJGPP Maintainer's Makefile                                    -*-Makefile-*-
 # Requires GNU sed

-## Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+## Copyright (C) 2005-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 This is a port of GNU Bison @VERSION@ to MSDOS/DJGPP.

-Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+Copyright (C) 2005-2010 Free Software Foundation, Inc.

 This program is free software: you can redistribute it and/or modify
 it under the terms of the GNU General Public License as published by
@@ -4,7 +4,7 @@ Rem Configure Bison for DJGPP.
 Rem WARNING WARNING WARNING: This file needs to have DOS CRLF end-of-line
 Rem format, or else stock DOS/Windows shells will refuse to run it.

-Rem Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+Rem Copyright (C) 2005-2010 Free Software Foundation, Inc.

 Rem This program is free software: you can redistribute it and/or modify
 Rem it under the terms of the GNU General Public License as published by
@@ -3,7 +3,7 @@
 # of the configure script generated by autoconf 2.62.


-# Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2005-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -3,7 +3,7 @@
 # This is the config.site file for configuring GNU packages
 # which are to be built with DJGPP tools.

-# Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2005-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 # sed script for DJGPP specific editing of config.hin

-# Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2005-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -7,7 +7,7 @@ Rem This batch file unpacks the Bison distribution while simultaneously
 Rem renaming some of the files whose names are invalid on DOS or conflict
 Rem with other file names after truncation to DOS 8+3 namespace.
 Rem
-Rem Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+Rem Copyright (C) 2005-2010 Free Software Foundation, Inc.
 Rem
 Rem This program is free software: you can redistribute it and/or modify
 Rem it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /* Subprocesses with pipes.

-   Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2005-2010 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,5 +1,5 @@
 /* Subprocesses with pipes.
-   Copyright (C) 2005, 2006, 2007, 2008 Free Software Foundation, Inc.
+   Copyright (C) 2005-2010 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -3,7 +3,7 @@
 # of the testsuite script generated by autoconf 2.61.


-# Copyright (C) 2007, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2007-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,4 +1,6 @@
+*.info*
 Makefile
+Makefile.in
 bison.1
 bison.aux
 bison.cp
@@ -15,11 +17,10 @@ bison.toc
 bison.tp
 bison.vr
 cross-options.texi
-Makefile.in
+gendocs_template
 refcard.dvi
 refcard.log
 refcard.ps
-*.info*
 stamp-vti
 version.texi
 yacc.1
@@ -1,4 +1,6 @@
+/*.info*
 /Makefile
+/Makefile.in
 /bison.1
 /bison.aux
 /bison.cp
@@ -15,11 +17,10 @@
 /bison.tp
 /bison.vr
 /cross-options.texi
-/Makefile.in
+/gendocs_template
 /refcard.dvi
 /refcard.log
 /refcard.ps
-/*.info*
 /stamp-vti
 /version.texi
 /yacc.1
@@ -1,6 +1,5 @@
 ## Process this file with automake to produce Makefile.in -*-Makefile-*-
-## Copyright (C) 2001, 2002, 2003, 2005, 2006, 2007, 2008 Free Software
-## Foundation, Inc.
+## Copyright (C) 2001-2003, 2005-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -33,8 +33,7 @@
 This manual (@value{UPDATED}) is for @acronym{GNU} Bison (version
@value{VERSION}), the @acronym{GNU} parser generator.

-Copyright @copyright{} 1988, 1989, 1990, 1991, 1992, 1993, 1995, 1998,
-1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
+Copyright @copyright{} 1988-1993, 1995, 1998-2010 Free Software
 Foundation, Inc.

@quotation
@@ -2704,9 +2703,6 @@ feature test macros can affect the behavior of Bison-generated
@findex %code requires
@findex %code provides
@findex %code top
-(The prologue alternatives described here are experimental.
-More user feedback will help to determine whether they should become permanent
-features.)

 The functionality of @var{Prologue} sections can often be subtle and
 inflexible.
@@ -3803,8 +3799,11 @@ typedef struct YYLTYPE
@} YYLTYPE;
@end example

-At the beginning of the parsing, Bison initializes all these fields to 1
-for @code{yylloc}.
+When @code{YYLTYPE} is not defined, at the beginning of the parsing, Bison
+initializes all these fields to 1 for @code{yylloc}.  To initialize
+@code{yylloc} with a custom location type (or to chose a different
+initialization), use the @code{%initial-action} directive.  @xref{Initial
+Action Decl, , Performing Actions before Parsing}.

@node Actions and Locations
@subsection Actions and Locations
@@ -4741,10 +4740,6 @@ Thus, @code{%code} replaces the traditional Yacc prologue,
 For a detailed discussion, see @ref{Prologue Alternatives}.

 For Java, the default location is inside the parser class.
-
-(Like all the Yacc prologue alternatives, this directive is experimental.
-More user feedback will help to determine whether it should become a permanent
-feature.)
@end deffn

@deffn {Directive} %code @var{qualifier} @{@var{code}@}
@@ -4822,10 +4817,6 @@ before any class definitions.
@end itemize
@end itemize

-(Like all the Yacc prologue alternatives, this directive is experimental.
-More user feedback will help to determine whether it should become a permanent
-feature.)
-
@cindex Prologue
 For a detailed discussion of how to use @code{%code} in place of the
 traditional Yacc prologue for C/C++, see @ref{Prologue Alternatives}.
@@ -4834,8 +4825,8 @@ traditional Yacc prologue for C/C++, see @ref{Prologue Alternatives}.
@deffn {Directive} %debug
 In the parser file, define the macro @code{YYDEBUG} to 1 if it is not
 already defined, so that the debugging facilities are compiled.
-@end deffn
@xref{Tracing, ,Tracing Your Parser}.
+@end deffn

@deffn {Directive} %define @var{variable}
@deffnx {Directive} %define @var{variable} "@var{value}"
@@ -5359,7 +5350,7 @@ This function is available if either the @code{%define api.push_pull "push"} or
@xref{Push Decl, ,A Push Parser}.

@deftypefun yypstate *yypstate_new (void)
-The fuction will return a valid parser instance if there was memory available
+The function will return a valid parser instance if there was memory available
 or 0 if no memory was available.
 In impure mode, it will also return 0 if a parser instance is currently
 allocated.
@@ -6816,7 +6807,7 @@ that allows variable-length arrays.  The default is 200.
 Do not allow @code{YYINITDEPTH} to be greater than @code{YYMAXDEPTH}.

@c FIXME: C++ output.
-Because of semantical differences between C and C++, the
+Because of semantic differences between C and C++, the
@acronym{LALR}(1) parsers in C produced by Bison cannot grow when compiled
 by C++ compilers.  In this precise case (compiling a C parser as C++) you are
 suggested to grow @code{YYINITDEPTH}.  The Bison maintainers hope to fix
@@ -7783,8 +7774,8 @@ traditional Yacc grammars.  If your grammar uses a Bison extension
 like @samp{%glr-parser}, Bison might not be Yacc-compatible even if
 this option is specified.

-@item -W
-@itemx --warnings
+@item -W [@var{category}]
+@itemx --warnings[=@var{category}]
 Output warnings falling in @var{category}.  @var{category} can be one
 of:
@table @code
@@ -8455,7 +8446,7 @@ global variables.

@noindent
 Then we request the location tracking feature, and initialize the
-first location's file name.  Afterwards new locations are computed
+first location's file name.  Afterward new locations are computed
 relatively to the previous locations: the file name will be
 automatically propagated.

@@ -8586,8 +8577,8 @@ parser's to get the set of defined tokens.
@example
 %@{                                            /* -*- C++ -*- */
 # include <cstdlib>
-# include <errno.h>
-# include <limits.h>
+# include <cerrno>
+# include <climits>
 # include <string>
 # include "calc++-driver.hh"
 # include "calc++-parser.hh"
@@ -8989,7 +8980,7 @@ changed using @code{%define location_type "@var{class-name}".}

@deftypemethod {Lexer} {int} yylex ()
 Return the next token.  Its type is the return value, its semantic
-value and location are saved and returned by the ther methods in the
+value and location are saved and returned by the their methods in the
 interface.

 Use @code{%define lex_throws} to specify any uncaught exceptions.
@@ -9007,7 +8998,7 @@ The return type can be changed using @code{%define position_type
@end deftypemethod

@deftypemethod {Lexer} {Object} getLVal ()
-Return the semantical value of the last token that yylex returned.
+Return the semantic value of the last token that yylex returned.

 The return type can be changed using @code{%define stype
 "@var{class-name}".}
@@ -9077,11 +9068,6 @@ Start error recovery without printing an error message.
@xref{Error Recovery}.
@end deffn

-@deffn {Statement} {return YYFAIL;}
-Print an error message and start error recovery. 
-@xref{Error Recovery}.
-@end deffn
-
@deftypefn {Function} {boolean} recovering ()
 Return whether error recovery is being done. In this state, the parser
 reads token until it reaches a known state, and then restarts normal
@@ -9123,7 +9109,7 @@ corresponds to these C macros.}.
@item
 Java lacks unions, so @code{%union} has no effect.  Instead, semantic
 values have a common base type: @code{Object} or as specified by
-@code{%define stype}.  Angle backets on @code{%token}, @code{type},
+@samp{%define stype}.  Angle brackets on @code{%token}, @code{type},
@code{$@var{n}} and @code{$$} specify subtypes rather than fields of
 an union.  The type of @code{$$}, even with angle brackets, is the base
 type since Java casts are not allow on the left-hand side of assignments.
@@ -9132,7 +9118,7 @@ left-hand side of assignments. See @pxref{Java Semantic Values} and
@pxref{Java Action Features}.

@item
-The prolog declarations have a different meaning than in C/C++ code.
+The prologue declarations have a different meaning than in C/C++ code.
@table @asis
@item @code{%code imports}
 blocks are placed at the beginning of the Java source code.  They may
@@ -9778,10 +9764,6 @@ Insert @var{code} verbatim into output parser source.
 Equip the parser for debugging.  @xref{Decl Summary}.
@end deffn

-@deffn {Directive} %debug
-Equip the parser for debugging.  @xref{Decl Summary}.
-@end deffn
-
@ifset defaultprec
@deffn {Directive} %default-prec
 Assign a precedence to rules that lack an explicit @samp{%prec}
@@ -10354,6 +10336,10 @@ grammatically indivisible.  The piece of text it represents is a token.

@bye

+@c Local Variables:
+@c fill-column: 76
+@c End:
+
@c LocalWords: texinfo setfilename settitle setchapternewpage finalout
@c LocalWords: ifinfo smallbook shorttitlepage titlepage GPL FIXME iftex
@c LocalWords: akim fn cp syncodeindex vr tp synindex dircategory direntry
@@ -19,7 +19,7 @@
 \def\finalout{\overfullrule=0pt}
 %\finalout

-% Copyright (c) 1998, 2001  Free Software Foundation, Inc.
+% Copyright (c) 1998, 2001, 2009-2010 Free Software Foundation, Inc.
 %
 % This file is part of Bison.
 %
@@ -1,4 +1,4 @@
-## Copyright (C) 2006 Free Software Foundation, Inc.
+## Copyright (C) 2006, 2009-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -19,7 +19,7 @@ straightforward use of _build/src/bison would.)

 --

-Copyright (C) 2006 Free Software Foundation, Inc.
+Copyright (C) 2006, 2009-2010 Free Software Foundation, Inc.

 This file is part of Bison, the GNU Compiler Compiler.

@@ -1,6 +1,6 @@
 #! /usr/bin/perl -w

-# Copyright (C) 2006, 2008 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2008-2010 Free Software Foundation, Inc.
 #
 # This file is part of Bison, the GNU Compiler Compiler.
 #
@@ -1,5 +1,5 @@
 ## Process this file with automake to produce Makefile.in -*-Makefile-*-
-## Copyright (C) 2005 Free Software Foundation, Inc.
+## Copyright (C) 2005, 2009-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,5 +1,5 @@
 ## Process this file with automake to produce Makefile.in -*-Makefile-*-
-## Copyright (C) 2005, 2006 Free Software Foundation, Inc.
+## Copyright (C) 2005-2006, 2009-2010 Free Software Foundation, Inc.

 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -31,12 +31,16 @@ $(BISON): $(BISON_IN)
 doc = $(top_srcdir)/doc/bison.texinfo
 extexi = $(top_srcdir)/examples/extexi
 # Extract in src.
-$(calc_extracted): $(doc) $(extexi)
+$(srcdir)/calc.stamp: $(doc) $(extexi)
+	rm -f $@ $@.tmp
+	touch $@.tmp
 	cd $(srcdir) && \
 	   $(AWK) -f ../extexi -v VERSION="$(VERSION)" \
 	     ../../doc/bison.texinfo -- calc++-parser.yy \
 	     calc++-scanner.ll calc++.cc calc++-driver.hh calc++-driver.cc
+	mv $@.tmp $@

+$(calc_extracted): $(srcdir)/calc.stamp

 ## ------------------- ##
 ## Parser generation.  ##
@@ -50,7 +54,10 @@ MAINTAINERCLEANFILES = $(srcdir)/*.stamp $(BUILT_SOURCES)
 # Compile the parser and save cycles.
 # This code comes from "Handling Tools that Produce Many Outputs",
 # from the Automake documentation.
-EXTRA_DIST = $(srcdir)/calc++-parser.stamp $(srcdir)/calc++-parser.yy
+EXTRA_DIST =					\
+  $(srcdir)/calc++-parser.stamp			\
+  $(srcdir)/calc++-parser.yy			\
+  $(srcdir)/calc.stamp
 # Don't depend on $(BISON) otherwise we would rebuild these files
 # in srcdir, including during distcheck, which is forbidden.
 $(srcdir)/calc++-parser.stamp: $(srcdir)/calc++-parser.yy $(BISON_IN)
@@ -1,7 +1,8 @@
 # Extract all examples from the manual source.            -*- AWK -*-

 # This file is part of GNU Bison
-# Copyright 1992, 2000, 2001, 2005, 2006 Free Software Foundation, Inc.
+# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2010 Free Software
+# Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,35 +1,55 @@
 .deps
 Makefile
 Makefile.in
+alloca.h
+alloca.in.h
 argmatch.c
 argmatch.h
+basename-lgpl.c
 basename.c
+binary-io.h
+bitrotate.h
 c-ctype.c
 c-ctype.h
 c-strcase.h
 c-strcasecmp.c
 c-strncasecmp.c
 charset.alias
+cloexec.c
+cloexec.h
 config.charset
 config.h
 config.hin
 configmake.h
+dirname-lgpl.c
 dirname.c
 dirname.h
+dup-safer-flag.c
 dup-safer.c
+dup2.c
+errno.h
 errno.in.h
 error.c
 error.h
 exitfail.c
 exitfail.h
+fatal-signal.c
+fatal-signal.h
+fcntl.c
+fcntl.h
+fcntl.in.h
+fd-safer-flag.c
 fd-safer.c
 fopen-safer.c
+fopen.c
+getdtablesize.c
 getopt.c
 getopt.h
 getopt.in.h
 getopt1.c
 getopt_.h
 getopt_int.h
+getpagesize.c
 gettext.h
 gnulib.mk
 hash.c
@@ -41,32 +61,72 @@ inttypes_.h
 localcharset.c
 localcharset.h
 malloc.c
+mbrtowc.c
+mbsinit.c
 mbswidth.c
 mbswidth.h
+memchr.c
+memchr.valgrind
 obstack.c
 obstack.h
+open.c
 pipe-safer.c
+pipe.c
+pipe.h
+pipe2-safer.c
+pipe2.c
 quote.c
 quote.h
 quotearg.c
 quotearg.h
+rawmemchr.c
+rawmemchr.valgrind
 ref-add.sed
 ref-add.sin
 ref-del.sed
 ref-del.sin
+sched.h
+sched.in.h
+sig-handler.h
+sigaction.c
+signal.h
+signal.in.h
+sigprocmask.c
+spawn.h
+spawn.in.h
+spawn_faction_addclose.c
+spawn_faction_adddup2.c
+spawn_faction_addopen.c
+spawn_faction_destroy.c
+spawn_faction_init.c
+spawn_int.h
+spawnattr_destroy.c
+spawnattr_init.c
+spawnattr_setflags.c
+spawnattr_setsigmask.c
+spawni.c
+spawnp.c
 stamp-h1
+stat.c
 stdbool.h
 stdbool.in.h
 stdbool_.h
+stddef.h
+stddef.in.h
 stdint.h
 stdint.in.h
 stdint_.h
 stdio--.h
 stdio-safer.h
+stdio-write.c
+stdio.h
+stdio.in.h
 stdlib.h
 stdlib.in.h
 stdlib_.h
 stpcpy.c
+strchrnul.c
+strchrnul.valgrind
 streq.h
 strerror.c
 string.h
@@ -79,6 +139,13 @@ strtol.c
 strtoul.c
 strverscmp.c
 strverscmp.h
+sys
+sys_stat.h
+sys_stat.in.h
+sys_wait.h
+sys_wait.in.h
+time.h
+time.in.h
 unistd--.h
 unistd-safer.h
 unistd.h
@@ -90,6 +157,9 @@ uniwidth.h
 unlocked-io.h
 unsetenv.c
 verify.h
+w32spawn.h
+wait-process.c
+wait-process.h
 wchar.h
 wchar.in.h
 wchar_.h
@@ -4,35 +4,55 @@
 /.deps
 /Makefile
 /Makefile.in
+/alloca.h
+/alloca.in.h
 /argmatch.c
 /argmatch.h
+/basename-lgpl.c
 /basename.c
+/binary-io.h
+/bitrotate.h
 /c-ctype.c
 /c-ctype.h
 /c-strcase.h
 /c-strcasecmp.c
 /c-strncasecmp.c
 /charset.alias
+/cloexec.c
+/cloexec.h
 /config.charset
 /config.h
 /config.hin
 /configmake.h
+/dirname-lgpl.c
 /dirname.c
 /dirname.h
+/dup-safer-flag.c
 /dup-safer.c
+/dup2.c
+/errno.h
 /errno.in.h
 /error.c
 /error.h
 /exitfail.c
 /exitfail.h
+/fatal-signal.c
+/fatal-signal.h
+/fcntl.c
+/fcntl.h
+/fcntl.in.h
+/fd-safer-flag.c
 /fd-safer.c
 /fopen-safer.c
+/fopen.c
+/getdtablesize.c
 /getopt.c
 /getopt.h
 /getopt.in.h
 /getopt1.c
 /getopt_.h
 /getopt_int.h
+/getpagesize.c
 /gettext.h
 /gnulib.mk
 /hash.c
@@ -44,32 +64,72 @@
 /localcharset.c
 /localcharset.h
 /malloc.c
+/mbrtowc.c
+/mbsinit.c
 /mbswidth.c
 /mbswidth.h
+/memchr.c
+/memchr.valgrind
 /obstack.c
 /obstack.h
+/open.c
 /pipe-safer.c
+/pipe.c
+/pipe.h
+/pipe2-safer.c
+/pipe2.c
 /quote.c
 /quote.h
 /quotearg.c
 /quotearg.h
+/rawmemchr.c
+/rawmemchr.valgrind
 /ref-add.sed
 /ref-add.sin
 /ref-del.sed
 /ref-del.sin
+/sched.h
+/sched.in.h
+/sig-handler.h
+/sigaction.c
+/signal.h
+/signal.in.h
+/sigprocmask.c
+/spawn.h
+/spawn.in.h
+/spawn_faction_addclose.c
+/spawn_faction_adddup2.c
+/spawn_faction_addopen.c
+/spawn_faction_destroy.c
+/spawn_faction_init.c
+/spawn_int.h
+/spawnattr_destroy.c
+/spawnattr_init.c
+/spawnattr_setflags.c
+/spawnattr_setsigmask.c
+/spawni.c
+/spawnp.c
 /stamp-h1
+/stat.c
 /stdbool.h
 /stdbool.in.h
 /stdbool_.h
+/stddef.h
+/stddef.in.h
 /stdint.h
 /stdint.in.h
 /stdint_.h
 /stdio--.h
 /stdio-safer.h
+/stdio-write.c
+/stdio.h
+/stdio.in.h
 /stdlib.h
 /stdlib.in.h
 /stdlib_.h
 /stpcpy.c
+/strchrnul.c
+/strchrnul.valgrind
 /streq.h
 /strerror.c
 /string.h
@@ -82,6 +142,13 @@
 /strtoul.c
 /strverscmp.c
 /strverscmp.h
+/sys
+/sys_stat.h
+/sys_stat.in.h
+/sys_wait.h
+/sys_wait.in.h
+/time.h
+/time.in.h
 /unistd--.h
 /unistd-safer.h
 /unistd.h
@@ -93,6 +160,9 @@
 /unlocked-io.h
 /unsetenv.c
 /verify.h
+/w32spawn.h
+/wait-process.c
+/wait-process.h
 /wchar.h
 /wchar.in.h
 /wchar_.h
@@ -1,6 +1,6 @@
 # Make bison/lib.

-# Copyright (C) 2001, 2002, 2003, 2004, 2006, 2008 Free Software Foundation,
+# Copyright (C) 2001-2004, 2006, 2008-2010 Free Software Foundation,
 # Inc.

 # This program is free software: you can redistribute it and/or modify
@@ -18,7 +18,7 @@

 include gnulib.mk

-AM_CFLAGS = $(WARN_CFLAGS)
+AM_CFLAGS += $(WARN_CFLAGS)

 # Implementation of bitsets.
 bitsets_sources = \
@@ -37,7 +37,6 @@ timevars_sources = \
 # Non-gnulib sources in Bison's internal library.
 libbison_a_SOURCES += \
  get-errno.h get-errno.c \
-  subpipe.h subpipe.c \
  $(bitsets_sources) $(additional_bitsets_sources) $(timevars_sources)

 # The Yacc compatibility library.
@@ -1,5 +1,6 @@
 /* Array bitsets.
-   Copyright (C) 2002, 2003, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002-2003, 2006, 2009-2010 Free Software Foundation,
+   Inc.
   Contributed by Michael Hayes ([email protected]).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Functions to support abitsets.
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,6 @@
 /* Base bitset stuff.
-   Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2006, 2009-2010 Free Software Foundation,
+   Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* General bitsets.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Generic bitsets.
-   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Bitset statistics.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Functions to support bitset statistics.
-   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,6 @@
 /* Bitset vectors.
-   Copyright (C) 2001, 2002, 2004, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2001-2002, 2004, 2006, 2009-2010 Free Software
+   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,5 +1,5 @@
 /* Bitset vectors.
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2010 Free Software Foundation, Inc.
   Contributed by Akim Demaille (akim@freefriends.org).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,6 @@
 /* Bitset vectors.
-   Copyright (C) 2001, 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2001-2002, 2004-2006, 2009-2010 Free Software
+   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,5 +1,5 @@
 /* Bitset vectors.
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Functions to support expandable bitsets.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Functions to support ebitsets.
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 /* get-errno.c - get and set errno.

-   Copyright (C) 2002, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2006, 2009-2010 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /* get-errno.h - get and set errno.

-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2010 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,5 +1,6 @@
 /* Functions to support link list bitsets.
-   Copyright (C) 2002, 2003, 2004, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2006, 2009-2010 Free Software Foundation,
+   Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Functions to support lbitsets.
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Fake libiberty.h for Bison.
-   Copyright (C) 2002, 2003, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2010 Free Software Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
@@ -1,6 +1,6 @@
 /* Yacc library main function.

-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2010 Free Software Foundation, Inc.

   This file is part of Bison, the GNU Compiler Compiler.

@@ -1,176 +0,0 @@
-/* Subprocesses with pipes.
-
-   Copyright (C) 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation, either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-/* Written by Paul Eggert <[email protected]>
-   and Florian Krohm <florian@edamail.fishkill.ibm.com>.  */
-
-#include <config.h>
-
-#include "subpipe.h"
-
-#include <errno.h>
-
-#include <signal.h>
-#if ! defined SIGCHLD && defined SIGCLD
-# define SIGCHLD SIGCLD
-#endif
-
-#include <stdlib.h>
-
-#include <unistd.h>
-#ifndef STDIN_FILENO
-# define STDIN_FILENO 0
-#endif
-#ifndef STDOUT_FILENO
-# define STDOUT_FILENO 1
-#endif
-#if ! HAVE_DUP2 && ! defined dup2
-# include <fcntl.h>
-# define dup2(f, t) (close (t), fcntl (f, F_DUPFD, t))
-#endif
-
-#if HAVE_SYS_WAIT_H
-# include <sys/wait.h>
-#endif
-#ifndef WEXITSTATUS
-# define WEXITSTATUS(stat_val) ((unsigned int) (stat_val) >> 8)
-#endif
-#ifndef WIFEXITED
-# define WIFEXITED(stat_val) (((stat_val) & 255) == 0)
-#endif
-
-#if HAVE_VFORK_H
-# include <vfork.h>
-#endif
-#if ! HAVE_WORKING_VFORK
-# define vfork fork
-#endif
-
-#include "error.h"
-#include "unistd-safer.h"
-
-#include "gettext.h"
-#define _(Msgid)  gettext (Msgid)
-
-#ifndef __attribute__
-/* This feature is available in gcc versions 2.5 and later.  */
-# if ! defined __GNUC__ || __GNUC__ < 2 || \
-(__GNUC__ == 2 && __GNUC_MINOR__ < 5) || __STRICT_ANSI__
-#  define __attribute__(Spec) /* empty */
-# endif
-#endif
-
-#ifndef ATTRIBUTE_UNUSED
-# define ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#endif
-
-
-/* Initialize this module.  */
-
-void
-init_subpipe (void)
-{
-#ifdef SIGCHLD
-  /* System V fork+wait does not work if SIGCHLD is ignored.  */
-  signal (SIGCHLD, SIG_DFL);
-#endif
-}
-
-
-/* Create a subprocess that is run as a filter.  ARGV is the
-   NULL-terminated argument vector for the subprocess.  Store read and
-   write file descriptors for communication with the subprocess into
-   FD[0] and FD[1]: input meant for the process can be written into
-   FD[0], and output from the process can be read from FD[1].  Return
-   the subprocess id.
-
-   To avoid deadlock, the invoker must not let incoming data pile up
-   in FD[1] while writing data to FD[0].  */
-
-pid_t
-create_subpipe (char const * const *argv, int fd[2])
-{
-  int pipe_fd[2];
-  int child_fd[2];
-  pid_t pid;
-
-  if (pipe_safer (child_fd) != 0 || pipe_safer (pipe_fd) != 0)
-    error (EXIT_FAILURE, errno, "pipe");
-  fd[0] = child_fd[1];
-  fd[1] = pipe_fd[0];
-  child_fd[1] = pipe_fd[1];
-
-  pid = vfork ();
-  if (pid < 0)
-    error (EXIT_FAILURE, errno, "fork");
-
-  if (! pid)
-    {
-      /* Child.  */
-      close (fd[0]);
-      close (fd[1]);
-      dup2 (child_fd[0], STDIN_FILENO);
-      close (child_fd[0]);
-      dup2 (child_fd[1], STDOUT_FILENO);
-      close (child_fd[1]);
-
-      /* The cast to (char **) rather than (char * const *) is needed
-	 for portability to older hosts with a nonstandard prototype
-	 for execvp.  */
-      execvp (argv[0], (char **) argv);
-
-      _exit (errno == ENOENT ? 127 : 126);
-    }
-
-  /* Parent.  */
-  close (child_fd[0]);
-  close (child_fd[1]);
-  return pid;
-}
-
-
-/* Wait for the subprocess to exit.  */
-
-void
-reap_subpipe (pid_t pid, char const *program)
-{
-#if HAVE_WAITPID || defined waitpid
-  int wstatus;
-  if (waitpid (pid, &wstatus, 0) < 0)
-    error (EXIT_FAILURE, errno, "waitpid");
-  else
-    {
-      int status = WIFEXITED (wstatus) ? WEXITSTATUS (wstatus) : -1;
-      if (status)
-	error (EXIT_FAILURE, 0,
-	       _(status == 126
-		 ? "subsidiary program `%s' could not be invoked"
-		 : status == 127
-		 ? "subsidiary program `%s' not found"
-		 : status < 0
-		 ? "subsidiary program `%s' failed"
-		 : "subsidiary program `%s' failed (exit status %d)"),
-	       program, status);
-    }
-#endif
-}
-
-void
-end_of_output_subpipe (pid_t pid ATTRIBUTE_UNUSED,
-		       int fd[2] ATTRIBUTE_UNUSED)
-{
-}
@@ -1,27 +0,0 @@
-/* Subprocesses with pipes.
-   Copyright (C) 2002, 2004, 2005 Free Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify
-   it under the terms of the GNU General Public License as published by
-   the Free Software Foundation, either version 3 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU General Public License for more details.
-
-   You should have received a copy of the GNU General Public License
-   along with this program.  If not, see <http://www.gnu.org/licenses/>.  */
-
-/* Written by Paul Eggert <[email protected]>
-   and Florian Krohm <florian@edamail.fishkill.ibm.com>.  */
-
-#if HAVE_SYS_TYPES_H
-# include <sys/types.h>
-#endif
-
-void init_subpipe (void);
-pid_t create_subpipe (char const * const *, int[2]);
-void end_of_output_subpipe (pid_t, int[2]);
-void reap_subpipe (pid_t, char const *);
@@ -1,5 +1,6 @@
 /* Timing variables for measuring compiler performance.
-   Copyright (C) 2000, 2002, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2002, 2004-2006, 2009-2010 Free Software
+   Foundation, Inc.
   Contributed by Alex Samuel <samuel@codesourcery.com>

   This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 /* This file contains the definitions for timing variables used to -*- C -*-
   measure run-time performance of the compiler.
-   Copyright (C) 2002, 2007 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2007, 2009-2010 Free Software Foundation, Inc.
   Contributed by Akim Demaille <akim@freefriends.org>.

   This file is part of Bison, the GNU Compiler Compiler.
@@ -1,5 +1,6 @@
 /* Timing variables for measuring compiler performance.
-   Copyright (C) 2000, 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2000, 2002, 2004, 2009-2010 Free Software Foundation,
+   Inc.
   Contributed by Alex Samuel <samuel@codesourcery.com>

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Variable array bitsets.
-   Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,5 +1,5 @@
 /* Functions to support vbitsets.
-   Copyright (C) 2002, 2004 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2010 Free Software Foundation, Inc.
   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

   This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 /* Yacc library error-printing function.

-   Copyright (C) 2002 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2010 Free Software Foundation, Inc.

   This file is part of Bison, the GNU Compiler Compiler.

@@ -1,15 +1,27 @@
+00gnulib.m4
 absolute-header.m4
+alloca.m4
 argmatch.m4
+assert.m4
+cloexec.m4
 config-h.m4
 dirname.m4
 dos.m4
 double-slash-root.m4
+dup2.m4
 environ.m4
 errno_h.m4
 error.m4
 exitfail.m4
 extensions.m4
+fatal-signal.m4
+fcntl-o.m4
+fcntl.m4
+fcntl_h.m4
+fopen.m4
+getdtablesize.m4
 getopt.m4
+getpagesize.m4
 gettext.m4
 gnulib-cache.m4
 gnulib-common.m4
@@ -29,23 +41,46 @@ lib-ld.m4
 lib-link.m4
 lib-prefix.m4
 localcharset.m4
+locale-fr.m4
+locale-ja.m4
+locale-zh.m4
 longlong.m4
 malloc.m4
 mbrtowc.m4
+mbsinit.m4
 mbstate_t.m4
 mbswidth.m4
+memchr.m4
+mmap-anon.m4
+mode_t.m4
+multiarch.m4
 nls.m4
+open.m4
+pipe.m4
+pipe2.m4
 po.m4
+posix_spawn.m4
 progtest.m4
 quote.m4
 quotearg.m4
+rawmemchr.m4
+sched_h.m4
 setenv.m4
+sig_atomic_t.m4
+sigaction.m4
+signal_h.m4
+signalblocking.m4
+spawn_h.m4
+stat.m4
 stdbool.m4
+stddef_h.m4
 stdint.m4
 stdint_h.m4
 stdio-safer.m4
+stdio_h.m4
 stdlib_h.m4
 stpcpy.m4
+strchrnul.m4
 strerror.m4
 string_h.m4
 strndup.m4
@@ -53,10 +88,15 @@ strnlen.m4
 strtol.m4
 strtoul.m4
 strverscmp.m4
+sys_stat_h.m4
+sys_wait_h.m4
 threadlib.m4
+time_h.m4
 unistd-safer.m4
 unistd_h.m4
 unlocked-io.m4
+wait-process.m4
+warn-on-use.m4
 warning.m4
 warnings.m4
 wchar.m4
@@ -1,15 +1,27 @@
+/00gnulib.m4
 /absolute-header.m4
+/alloca.m4
 /argmatch.m4
+/assert.m4
+/cloexec.m4
 /config-h.m4
 /dirname.m4
 /dos.m4
 /double-slash-root.m4
+/dup2.m4
 /environ.m4
 /errno_h.m4
 /error.m4
 /exitfail.m4
 /extensions.m4
+/fatal-signal.m4
+/fcntl-o.m4
+/fcntl.m4
+/fcntl_h.m4
+/fopen.m4
+/getdtablesize.m4
 /getopt.m4
+/getpagesize.m4
 /gettext.m4
 /gnulib-cache.m4
 /gnulib-common.m4
@@ -29,23 +41,46 @@
 /lib-link.m4
 /lib-prefix.m4
 /localcharset.m4
+/locale-fr.m4
+/locale-ja.m4
+/locale-zh.m4
 /longlong.m4
 /malloc.m4
 /mbrtowc.m4
+/mbsinit.m4
 /mbstate_t.m4
 /mbswidth.m4
+/memchr.m4
+/mmap-anon.m4
+/mode_t.m4
+/multiarch.m4
 /nls.m4
+/open.m4
+/pipe.m4
+/pipe2.m4
 /po.m4
+/posix_spawn.m4
 /progtest.m4
 /quote.m4
 /quotearg.m4
+/rawmemchr.m4
+/sched_h.m4
 /setenv.m4
+/sig_atomic_t.m4
+/sigaction.m4
+/signal_h.m4
+/signalblocking.m4
+/spawn_h.m4
+/stat.m4
 /stdbool.m4
+/stddef_h.m4
 /stdint.m4
 /stdint_h.m4
 /stdio-safer.m4
+/stdio_h.m4
 /stdlib_h.m4
 /stpcpy.m4
+/strchrnul.m4
 /strerror.m4
 /string_h.m4
 /strndup.m4
@@ -53,10 +88,15 @@
 /strtol.m4
 /strtoul.m4
 /strverscmp.m4
+/sys_stat_h.m4
+/sys_wait_h.m4
 /threadlib.m4
+/time_h.m4
 /unistd-safer.m4
 /unistd_h.m4
 /unlocked-io.m4
+/wait-process.m4
+/warn-on-use.m4
 /warning.m4
 /warnings.m4
 /wchar.m4
@@ -1,5 +1,5 @@
 # bison-i18n.m4 serial 2
-dnl Copyright (C) 2005-2006 Free Software Foundation, Inc.
+dnl Copyright (C) 2005-2006, 2009-2010 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
 dnl with or without modifications, as long as this notice is preserved.
@@ -1,6 +1,6 @@
 # Sanity test a C compiler.

-# Copyright (C) 2006 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009-2010 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,7 +1,7 @@
 # -*- Autoconf -*-
 # Sanity-test a C++ compiler.
 #
-# Copyright (C) 2004, 2006 Free Software Foundation, Inc.
+# Copyright (C) 2004, 2006, 2009-2010 Free Software Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
 # it under the terms of the GNU General Public License as published by
@@ -1,27 +1,72 @@
-# Copyright 2000 Free Software Foundation, Inc.
-#
-# This program is free software: you can redistribute it and/or modify
-# it under the terms of the GNU General Public License as published by
-# the Free Software Foundation, either version 3 of the License, or
-# (at your option) any later version.
-#
-# This program is distributed in the hope that it will be useful,
-# but WITHOUT ANY WARRANTY; without even the implied warranty of
-# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-# GNU General Public License for more details.
-#
-# You should have received a copy of the GNU General Public License
-# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+# m4.m4 serial 10

-# BISON_PROG_GNU_M4
-# -----------------
-# Check for GNU m4, at least 1.3 (supports frozen files).
-AC_DEFUN([BISON_PROG_GNU_M4],
-[AC_PATH_PROGS(M4, gm4 gnum4 m4, m4)
-AC_CACHE_CHECK(whether m4 supports frozen files, ac_cv_prog_gnu_m4,
-[ac_cv_prog_gnu_m4=no
-if test x"$M4" != x; then
-  case `$M4 --help < /dev/null 2>&1` in
-    *reload-state*) ac_cv_prog_gnu_m4=yes ;;
-  esac
-fi])])
+# Copyright (C) 2000, 2006-2010 Free Software Foundation, Inc.
+
+# Copying and distribution of this file, with or without modification,
+# are permitted in any medium without royalty provided the copyright
+# notice and this notice are preserved.  This file is offered as-is,
+# without warranty of any kind.
+
+# AC_PROG_GNU_M4
+# --------------
+# Check for GNU M4, at least 1.4.6 (all earlier versions had bugs in
+# trace support and regexp support):
+# http://lists.gnu.org/archive/html/bug-gnu-utils/2006-11/msg00096.html
+# http://lists.gnu.org/archive/html/bug-autoconf/2009-07/msg00023.html
+# Also, check whether --error-output (through 1.4.x) or --debugfile (2.0)
+# is supported, and AC_SUBST M4_DEBUGFILE accordingly.
+AC_DEFUN([AC_PROG_GNU_M4],
+  [AC_ARG_VAR([M4], [Location of GNU M4 1.4.6 or later.  Defaults to the first
+    program of `m4', `gm4', or `gnum4' on PATH that meets Autoconf needs.])
+  AC_CACHE_CHECK([for GNU M4 that supports accurate traces], [ac_cv_path_M4],
+    [rm -f conftest.m4f
+ac_had_posixly_correct=${POSIXLY_CORRECT:+yes}
+AS_UNSET([POSIXLY_CORRECT])
+AC_PATH_PROGS_FEATURE_CHECK([M4], [m4 gm4 gnum4],
+      [dnl Creative quoting here to avoid raw dnl and ifdef in configure.
+      # Root out GNU M4 1.4.5, as well as non-GNU m4 that ignore -t, -F.
+      ac_snippet=change'quote(<,>)in''dir(<if''def>,mac,bug)'
+      ac_snippet=${ac_snippet}pat'subst(a,\(b\)\|\(a\),\1)d'nl
+      test -z "`$ac_path_M4 -F conftest.m4f </dev/null 2>&1`" \
+      && test -z "`AS_ECHO([$ac_snippet]) | $ac_path_M4 --trace=mac 2>&1`" \
+      && test -f conftest.m4f \
+      && ac_cv_path_M4=$ac_path_M4 ac_path_M4_found=:
+      rm -f conftest.m4f],
+      [AC_MSG_ERROR([no acceptable m4 could be found in \$PATH.
+GNU M4 1.4.6 or later is required; 1.4.13 is recommended])])])
+  M4=$ac_cv_path_M4
+  AC_CACHE_CHECK([whether $ac_cv_path_M4 accepts --gnu],
+    [ac_cv_prog_gnu_m4_gnu],
+    [case `$M4 --help < /dev/null 2>&1` in
+      *--gnu*) ac_cv_prog_gnu_m4_gnu=yes ;;
+      *) ac_cv_prog_gnu_m4_gnu=no ;;
+    esac])
+  if test "$ac_cv_prog_gnu_m4_gnu" = yes; then
+    M4_GNU=--gnu
+  else
+    M4_GNU=
+  fi
+  AC_SUBST([M4_GNU])
+  if test x$ac_had_posixly_correct = xyes; then
+    POSIXLY_CORRECT=:
+    if test $ac_cv_prog_gnu_m4_gnu = no; then
+      AC_MSG_WARN([The version of M4 that was found does not support -g.])
+      AC_MSG_WARN([Using it with POSIXLY_CORRECT set may cause problems.])
+    fi
+  fi
+  AC_CACHE_CHECK([how m4 supports trace files], [ac_cv_prog_gnu_m4_debugfile],
+    [case `$M4 --help < /dev/null 2>&1` in
+      *debugfile*) ac_cv_prog_gnu_m4_debugfile=--debugfile ;;
+      *) ac_cv_prog_gnu_m4_debugfile=--error-output ;;
+    esac])
+  AC_SUBST([M4_DEBUGFILE], [$ac_cv_prog_gnu_m4_debugfile])
+])
+
+# Compatibility for bootstrapping with Autoconf 2.61.
+dnl FIXME - replace this with AC_PREREQ([2.62]) after the release.
+# AC_PATH_PROGS_FEATURE_CHECK was added the same time the slightly broken,
+# undocumented _AC_PATH_PROG_FEATURE_CHECK was deleted.
+m4_ifndef([AC_PATH_PROGS_FEATURE_CHECK],
+  [m4_define([AC_PATH_PROGS_FEATURE_CHECK],
+    [_AC_PATH_PROG_FEATURE_CHECK([$1], [$2], [$3], [$5])
+])])
--- a/Show More
+++ b/Show More