version 2.5.1

* NEWS: Record release date.
NEWS: prepare for 2.5.1.
2026-08-10 03:05:14 +00:00 · 2012-06-05 10:03:25 +02:00 · 2012-06-05 10:02:17 +02:00 · 2012-06-05 09:24:43 +02:00 · 2012-06-05 09:17:43 +02:00 · 2012-05-23 14:41:37 +02:00
207 changed files with 5344 additions and 5293 deletions
@@ -1 +1 @@
-ChangeLog merge=merge-changelog
+
@@ -1,4 +1,3 @@
-
 /*.cache
 /*.flc
 /*.prj
@@ -7,6 +6,7 @@
 /.version
 /ABOUT-NLS
 /COPYING
+/ChangeLog
 /GNUmakefile
 /INSTALL
 /Makefile
@@ -31,4 +31,4 @@
 /patches
 /releases
 /stamp-h*
-
+/README-release
@@ -1 +1 @@
-2.3b
+2.5
@@ -5,4 +5,38 @@ Bison was written primarily by Robert Corbett.
 Richard Stallman made it Yacc-compatible.

 Wilfred Hansen of Carnegie Mellon University added multicharacter
-string literals and other features.
+string literals and other features (Bison 1.25, 1995).
+
+Akim Demaille rewrote the parser in Bison, and changed the back end to
+use M4 (1.50, 2002).
+
+Paul Hilfinger added GLR support (Bison 1.50, 2002).
+
+Joel E. Denny contributed canonical-LR support, and invented and added
+IELR and LAC (Lookahead Correction) support (Bison 2.5, 2011).
+
+Paolo Bonzini contributed Java support (Bison 2.4, 2008).
+
+Alex Rozenman added named reference support (Bison 2.5, 2011).
+
+Paul Eggert fixed a million portability issues, arbitrary limitations,
+and nasty bugs.
+
+-----
+
+Copyright (C) 1998-2012 Free Software Foundation, Inc.
+
+This file is part of Bison, the GNU Compiler Compiler.
+
+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/>.
@@ -140,7 +140,7 @@
 1996-05-12  Jim Meyering  <[email protected]>

 	* src/bison.simple (__yy_memcpy) [__cplusplus]: Reorder declarations
- 	of variables f and t.
+	of variables f and t.

 1996-05-11  Richard Stallman  <[email protected]>

@@ -1,3 +1,155 @@
+2012-01-15  Jim Meyering  <[email protected]>
+
+	maint: get fdl.texi from gnulib
+	* bootstrap.conf (gnulib_modules): Add fdl.
+	* doc/fdl.texi: Remove file.
+	* doc/.gitignore: Add it here.
+
+2012-01-15  Jim Meyering  <[email protected]>
+
+	maint: spell "file system" as two separate words
+	* doc/Doxyfile.in: Spell it "file system", to avoid a
+	"make syntax-check" failure.
+
+2012-01-15  Jim Meyering  <[email protected]>
+
+	maint: avoid "the the"
+	* djgpp/README.in: s/the the/the/
+	* src/parse-gram.c (lloc_default): Likewise.
+	* src/parse-gram.y (lloc_default): Likewise, and remove a
+	trailing space.
+
+2012-01-13  Jim Meyering  <[email protected]>
+
+	build: avoid warning from coverity about lbitset_elt_find
+	* lib/lbitset.c (lbitset_elt_find): Remove unnecessary test of "elt",
+	at a point where we know it is non-NULL, due to prior dereference.
+
+2012-01-13  Akim Demaille  <[email protected]>
+
+	maint: factor copyright year.
+	* configure.ac: Use $PACKAGE_COPYRIGHT_YEAR instead of repeating it.
+
+2012-01-13  Akim Demaille  <[email protected]>
+
+	maint: catch missing gnulib macros.
+	* configure.ac: Add m4_pattern_forbid.
+
+2012-01-11  Tim Landscheidt  <[email protected]>
+
+	java: remove used variable.
+	* data/lalr1.java (yyresult): remove, unused.
+
+2012-01-11  Akim Demaille  <[email protected]>
+
+	scanner: fix typo.
+	* src/scan-skel.l (@`): s/emtpy/empty/.
+	Reported by Tim Landscheidt.
+
+2012-01-06  Jim Meyering  <[email protected]>
+
+	build: avoid warnings about set-but-not-used variables
+	* lib/bitset_stats.c (bitset_stats_list): Remove declaration
+	and set of unused local, "type".
+	* lib/ebitset.c (ebitset_init): Likewise, for "size".
+	* lib/lbitset.c (lbitset_not): Likewise, for "elt".
+
+2011-08-21  Joel E. Denny  <[email protected]>
+
+	tests: add -pedantic for --enable-gcc-warnings.
+	This should help to avoid some portability problems.  For example,
+	it would have revealed the empty unions fixed by the last patch
+	* configure.ac (WARN_CFLAGS_TESTS, WARN_CXXFLAGS_TEST): Implement.
+	* tests/synclines.at (AT_TEST_SYNCLINE): Avoid -pedantic warning
+	about an empty translation unit.
+
+2011-08-21  Joel E. Denny  <[email protected]>
+
+	tests: fix empty unions.
+	Empty unions are not accepted by the ISO C99 grammar or by at
+	least some versions of Sun Studio.  Reported by Wolfgang S. Kechel
+	at
+	<http://lists.gnu.org/archive/html/bug-bison/2011-08/msg00003.html>.
+	* NEWS (2.5.1): Document fix.
+	* THANKS (Wolfgang S. Kechel): Add.
+	* tests/existing.at (GNU Cim Grammar)
+	(GNU pic (Groff 1.18.1) Grammar.): Remove empty %union.
+
+2011-07-10  Joel E. Denny  <[email protected]>
+
+	build: avoid YACC typo inherited from Autoconf.
+	The typo shows up in the `configure --help' output.  Reported by
+	W.C.A. Wijngaards and Paul Eggert at
+	<http://lists.gnu.org/archive/html/bug-bison/2011-07/msg00000.html>.
+	* README-hacking (Release Procedure): Remind about updating
+	maintainer tools before a release.
+	* THANKS (W.C.A. Wijngaards): Add.
+	* configure.ac (AC_PREREQ): Set to 2.68, which fixes the YACC
+	typo.
+
+2011-07-10  Joel E. Denny  <[email protected]>
+
+	build: create xz instead of bzip2 tarballs.
+	Suggested by Jim Meyering at
+	<http://lists.gnu.org/archive/html/bug-bison/2011-06/msg00012.html>.
+	* README-hacking (Release Procedure): Update example.
+	* configure.ac (AM_INIT_AUTOMAKE): Replace dist-bzip2 with
+	dist-xz.
+
+2011-05-29  Joel E. Denny  <[email protected]>
+
+	doc: clean up references to `Locations Overview'.
+	* doc/bison.texinfo (Locations Overview): Rename node to...
+	(Locations): ... this, which is its section name.  Update menus to
+	match that and not to use the title `Tracking Locations', which is
+	a different section.
+
+2011-05-29  Joel E. Denny  <[email protected]>
+
+	doc: clean up references to `Tracking Locations'.
+	* doc/bison.texinfo (Locations): Rename node to...
+	(Tracking Locations): ... this, which is its section name, and
+	update all cross references.  The trouble is that there is another
+	node about locations.  Its section name is `Locations', which was
+	easily confused with the node name of this node.  Moreover, its
+	node name is `Locations Overview', which was mistakenly used to
+	label some cross references to this node.
+
+2011-05-29  Joel E. Denny  <[email protected]>
+
+	doc: clean up `Named References' a little.
+	* doc/bison.texinfo (Named References): Rename section to match
+	the node name, and update all cross references.  Don't use the
+	acronyms RHS and LHS given that we don't expand them anywhere in
+	the manual.  Try to use @samp and @code properly.  Mention that
+	named references are experimental as we've already stated in NEWS.
+	(Destructor Decl): Expand the only remaining use of RHS or LHS.
+
+2011-05-29  Joel E. Denny  <[email protected]>
+
+	doc: motivate named references.
+	Suggested by Hans Aberg at
+	<http://lists.gnu.org/archive/html/bug-bison/2011-05/msg00008.html>.
+	* doc/bison.texinfo (Named References): Explain briefly how
+	they're better than the traditional positional references.
+
+2011-05-29  Joel E. Denny  <[email protected]>
+
+	doc: discuss named references after locations.
+	Reported by Hans Aberg at
+	<http://lists.gnu.org/archive/html/bug-bison/2011-05/msg00008.html>.
+	* NEWS (2.5.1): Document.
+	* doc/bison.texinfo (Named References): Because it discusses
+	locations in addition to semantic values, move this subsection out
+	of the section `Defining Language Semantics', where locations have
+	not yet been introduced, to be a new section after the following
+	section, `Tracking Locations'.
+
+2011-05-29  Joel E. Denny  <[email protected]>
+
+	Prepare for the possibility of a 2.5.1 release.
+	* NEWS (2.5.1): New heading.
+
 2011-05-14  Joel E. Denny  <[email protected]>

 	Version 2.5.
@@ -8044,7 +8196,7 @@
 	(PERCENT_LEX_PARAM, PERCENT_PARSE_PARAM): Remove the {...} part,
 	which is now, again, a separate token.
 	Adjust all dependencies.
-	Whereever actions with $ and @ are used, use translate_code.
+	Wherever actions with $ and @ are used, use translate_code.
 	(action): Remove this nonterminal which is now useless.
 	* src/reader.c: Include assert.h, scan-gram.h and scan-code.h.
 	(grammar_current_rule_action_append): Use translate_code.
@@ -9230,10 +9382,10 @@

 	* Makefile.am: DJGPP specific files added to EXTRA_DIST.
 	* djgpp/Makefile.maint: Fix PACKAGE variable computation.
-	* djgpp/config.bat: Replace every occurence of the file name
+	* djgpp/config.bat: Replace every occurrence of the file name
 	scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with
 	c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS.
-	* djgpp/config.sed: Replace every occurence of the file name
+	* djgpp/config.sed: Replace every occurrence of the file name
 	scan-gram-c.c with c-scan-gram.c. The same for scan-skel-c.c with
 	c-scan-skel.c to conform with the 8.3 file name restriction on MSDOS.
 	* djgpp/djunpack.bat: DJGPP specific file.
@@ -12506,7 +12658,7 @@
 	(YYERROR): Goto to yyerrorlab, not yyerrlab1.
 	(yyerrlab1): Remove, but where it used to be (now the bottom part of
 	yyerrlab), when hitting EOF, pop the whole stack here instead of
-	merely falling thru the default error handling mechanism.
+	merely falling through the default error handling mechanism.
 	(yyerrorlab): New label, with the old contents of YYERROR,
 	plus the following change: pop the stack of rhs corresponding
 	to the production that invoked YYERROR.  That is how Yacc
@@ -16228,7 +16380,7 @@

 2002-07-30  Akim Demaille  <[email protected]>

-	`stage' was accidently included in a previous patch.
+	`stage' was accidentally included in a previous patch.
 	Initiate its autoconfiscation.

 	* configure.in: Look for malloc.h and sys/times.h.
@@ -19231,7 +19383,7 @@
 	(insert_accepting_state, augment_automaton): Remove, since now
 	these states are automatically computed from the initial state.
 	(generate_states): Adjust.
-	* src/print.c: When reporting a rule number to the user, substract
+	* src/print.c: When reporting a rule number to the user, subtract
 	1, so that the axiom rule is rule 0, and the first user rule is 1.
 	* src/reduce.c: Likewise.
 	* src/print_graph.c (print_core): For the time being, just as for
@@ -24134,7 +24286,7 @@

 	-----

-	Copyright (C) 1987-1988, 1991-2011 Free Software Foundation,
+	Copyright (C) 1987-1988, 1991-2012 Free Software Foundation,
 	Inc.

 	Copying and distribution of this file, with or without
@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in -*-Makefile-*-

-## Copyright (C) 2001-2011 Free Software Foundation, Inc.
+## Copyright (C) 2001-2012 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
@@ -23,25 +23,21 @@ 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 \
-  OChangeLog PACKAGING \
+EXTRA_DIST = .prev-version .version \
+  cfg.mk ChangeLog-1998 ChangeLog-2012 PACKAGING \
  djgpp/Makefile.maint djgpp/README.in djgpp/config.bat \
  djgpp/config.sed djgpp/config.site djgpp/config_h.sed \
  djgpp/subpipe.c djgpp/subpipe.h djgpp/djunpack.bat \
  djgpp/fnchange.lst djgpp/testsuite.sed

-
-.PHONY: maintainer-check
-maintainer-check:
-	cd tests && $(MAKE) $(AM_MAKEFLAGS) $@
-
-.PHONY: maintainer-push-check
-maintainer-push-check:
-	cd tests && $(MAKE) $(AM_MAKEFLAGS) $@
-
-.PHONY: maintainer-xml-check
-maintainer-xml-check:
-	cd tests && $(MAKE) $(AM_MAKEFLAGS) $@
+MAINTAINER_CHECKS =				\
+  maintainer-check				\
+  maintainer-push-check				\
+  maintainer-xml-check				\
+  maintainer-release-check
+.PHONY: $(MAINTAINER_CHECKS)
+$(MAINTAINER_CHECKS):
+	$(AM_V_GEN)cd tests && $(MAKE) $(AM_MAKEFLAGS) $@

 # See comments in build-aux/git-version-gen.  However, we make .version depend
 # on configure so that .version and VERSION/PACKAGE_VERSION stay in sync in the
@@ -54,15 +50,29 @@ maintainer-xml-check:
 # pass incorrectly.
 BUILT_SOURCES = $(top_srcdir)/.version
 $(top_srcdir)/.version: configure
-	echo $(VERSION) > $@-t && mv $@-t $@
-dist-hook:
-	echo $(VERSION) > $(distdir)/.tarball-version
+	$(AM_V_GEN)echo $(VERSION) > $@-t && mv $@-t $@
+dist-hook: gen-ChangeLog
+	$(AM_V_GEN)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$$'    \
+	$(AM_V_GEN) find data -type f		\
+	  | grep -v -E '^data/bison.m4$$'	\
 	  | xargs $(build_aux)/$@
 	@echo 'warning: src/parse-gram.[hc] may need to be regenerated.'
 update-package-copyright-year:
-	$(build_aux)/$@ configure.ac
+	$(AM_V_GEN)$(build_aux)/$@ configure.ac
+
+gen_start_date = 2012-01-16
+.PHONY: gen-ChangeLog
+gen-ChangeLog:
+	$(AM_V_GEN)if test -d $(srcdir)/.git; then		\
+	  $(top_srcdir)/build-aux/gitlog-to-changelog		\
+	    --strip-tab						\
+	    --strip-cherry-picked				\
+	    --no-cluster					\
+	    --amend=$(srcdir)/build-aux/git-log-fix		\
+	    --since=$(gen_start_date) > $(distdir)/cl-t;	\
+	  rm -f $(distdir)/ChangeLog;				\
+	  mv $(distdir)/cl-t $(distdir)/ChangeLog;		\
+	fi
@@ -1,5 +1,101 @@
-Bison News
----------
+GNU Bison NEWS
+
+* Noteworthy changes in release 2.5.1 (2012-06-05) [stable]
+
+** Future changes:
+
+  The next major release will drop support for generating parsers in K&R C.
+
+** yacc.c: YYBACKUP works as expected.
+
+** glr.c improvements:
+
+*** Location support is eliminated when not requested:
+
+  GLR parsers used to include location-related code even when locations were
+  not requested, and therefore not even usable.
+
+*** __attribute__ is preserved:
+
+  __attribute__ is no longer disabled when __STRICT_ANSI__ is defined (i.e.,
+  when -std is passed to GCC).
+
+** lalr1.java: several fixes:
+
+  The Java parser no longer throws ArrayIndexOutOfBoundsException if the
+  first token leads to a syntax error.  Some minor clean ups.
+
+** Changes for C++:
+
+*** C++11 compatibility:
+
+  C and C++ parsers use "nullptr" instead of "0" when __cplusplus is 201103L
+  or higher.
+
+*** Header guards
+
+  The header files such as "parser.hh", "location.hh", etc. used a constant
+  name for preprocessor guards, for instance:
+
+  #ifndef BISON_LOCATION_HH
+  # define BISON_LOCATION_HH
+  ...
+  #endif // !BISON_LOCATION_HH
+
+  The inclusion guard is now computed from "PREFIX/FILE-NAME", where lower
+  case characters are converted to upper case, and series of
+  non-alphanumerical characters are converted to an underscore.
+
+  With "bison -o lang++/parser.cc", "location.hh" would now include:
+
+  #ifndef YY_LANG_LOCATION_HH
+  # define YY_LANG_LOCATION_HH
+  ...
+  #endif // !YY_LANG_LOCATION_HH
+
+*** C++ locations:
+
+  The position and location constructors (and their initialize methods)
+  accept new arguments for line and column.  Several issues in the
+  documentation were fixed.
+
+** liby is no longer asking for "rpl_fprintf" on some platforms.
+
+** Changes in the manual:
+
+*** %printer is documented
+
+  The "%printer" directive, supported since at least Bison 1.50, is finally
+  documented.  The "mfcalc" example is extended to demonstrate it.
+
+  For consistency with the C skeletons, the C++ parsers now also support
+  "yyoutput" (as an alias to "debug_stream ()").
+
+*** Several improvements have been made:
+
+  The layout for grammar excerpts was changed to a more compact scheme.
+  Named references are motivated.  The description of the automaton
+  description file (*.output) is updated to the current format.  Incorrect
+  index entries were fixed.  Some other errors were fixed.
+
+** Building bison:
+
+*** Conflicting prototypes with recent/modified Flex.
+
+  Fixed build problems with the current, unreleased, version of Flex, and
+  some modified versions of 2.5.35, which have modified function prototypes.
+
+*** Warnings during the build procedure have been eliminated.
+
+*** Several portability problems in the test suite have been fixed:
+
+  This includes warnings with some compilers, unexpected behavior of tools
+  such as diff, warning messages from the test suite itself, etc.
+
+*** The install-pdf target work properly:
+
+  Running "make install-pdf" (or -dvi, -html, -info, and -ps) no longer
+  halts in the middle of its course.

 * Changes in version 2.5 (2011-05-14):

@@ -58,8 +154,8 @@ Bison News
    %define lr.type canonical-lr

  The default-reduction optimization in the parser tables can also be
-  adjusted using `%define lr.default-reductions'.  For details on both
-  of these features, see the new section `Tuning LR' in the Bison
+  adjusted using "%define lr.default-reductions".  For details on both
+  of these features, see the new section "Tuning LR" in the Bison
  manual.

  These features are experimental.  More user feedback will help to
@@ -75,7 +171,7 @@ Bison News
  cause error recovery to begin in a different syntactic context than
  the one in which the invalid token was encountered.  Second, when
  verbose error messages are enabled (with %error-verbose or the
-  obsolete `#define YYERROR_VERBOSE'), the expected token list in the
+  obsolete "#define YYERROR_VERBOSE"), the expected token list in the
  syntax error message can both contain invalid tokens and omit valid
  tokens.

@@ -100,7 +196,7 @@ Bison News

    %define parse.lac full

-  See the new section `LAC' in the Bison manual for additional
+  See the new section "LAC" in the Bison manual for additional
  details including a few caveats.

  LAC is an experimental feature.  More user feedback will help to
@@ -125,7 +221,7 @@ Bison News
  except that the manner in which Bison processes multiple definitions
  for the same NAME differs.  Most importantly, -F and --force-define
  quietly override %define, but -D and --define do not.  For further
-  details, see the section `Bison Options' in the Bison manual.
+  details, see the section "Bison Options" in the Bison manual.

 *** Variables renamed:

@@ -183,8 +279,8 @@ Bison News

  Similarly to the C parsers, the C++ parsers now define the YYRHSLOC
  macro and use it in the default YYLLOC_DEFAULT.  You are encouraged
-  to use it.  If, for instance, your location structure has `first'
-  and `last' members, instead of
+  to use it.  If, for instance, your location structure has "first"
+  and "last" members, instead of

      # define YYLLOC_DEFAULT(Current, Rhs, N)                             \
        do                                                                 \
@@ -255,7 +351,7 @@ Bison News

 ** Verbose syntax error message fixes:

-  When %error-verbose or the obsolete `#define YYERROR_VERBOSE' is
+  When %error-verbose or the obsolete "#define YYERROR_VERBOSE" is
  specified, syntax error messages produced by the generated parser
  include the unexpected token as well as a list of expected tokens.
  The effect of %nonassoc on these verbose messages has been corrected
@@ -266,7 +362,7 @@ Bison News
    in order to detect a syntax error.  Because no unexpected token or
    expected tokens can then be reported, the verbose syntax error
    message described above is suppressed, and the parser instead
-    reports the simpler message, `syntax error'.  Previously, this
+    reports the simpler message, "syntax error".  Previously, this
    suppression was sometimes erroneously triggered by %nonassoc when a
    lookahead was actually required.  Now verbose messages are
    suppressed only when all previous lookaheads have already been
@@ -302,7 +398,7 @@ Bison News

 ** -W/--warnings fixes:

-*** Bison now properly recognizes the `no-' versions of categories:
+*** Bison now properly recognizes the "no-" versions of categories:

  For example, given the following command line, Bison now enables all
  warnings except warnings for incompatibilities with POSIX Yacc:
@@ -313,7 +409,7 @@ Bison News

  Previously, conflict reports were independent of Bison's normal
  warning system.  Now, Bison recognizes the warning categories
-  `conflicts-sr' and `conflicts-rr'.  This change has important
+  "conflicts-sr" and "conflicts-rr".  This change has important
  consequences for the -W and --warnings command-line options.  For
  example:

@@ -327,16 +423,16 @@ Bison News
  expected number of conflicts is not reported, so -W and --warning
  then have no effect on the conflict report.

-*** The `none' category no longer disables a preceding `error':
+*** The "none" category no longer disables a preceding "error":

  For example, for the following command line, Bison now reports
  errors instead of warnings for incompatibilities with POSIX Yacc:

    bison -Werror,none,yacc gram.y

-*** The `none' category now disables all Bison warnings:
+*** The "none" category now disables all Bison warnings:

-  Previously, the `none' category disabled only Bison warnings for
+  Previously, the "none" category disabled only Bison warnings for
  which there existed a specific -W/--warning category.  However,
  given the following command line, Bison is now guaranteed to
  suppress all warnings:
@@ -381,7 +477,7 @@ Bison News
   errors should no longer cause M4 to report a broken pipe on the
   affected platforms.

-** `%prec IDENTIFIER' requires IDENTIFIER to be defined separately.
+** "%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
@@ -436,7 +532,7 @@ Bison News
  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
+  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
@@ -447,7 +543,7 @@ Bison News
  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
+  %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
@@ -455,7 +551,7 @@ Bison News
  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
+  epilogue (that is, after the second "%%") in the Bison input file.  In
  this release (2.4.2), 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
@@ -483,7 +579,7 @@ Bison News

    exp: exp "+" exp { $$ = $1 + $3; };

-  Some grammars still depend on this `feature'.  Bison 2.4.1 restores
+  Some grammars still depend on this "feature".  Bison 2.4.1 restores
  the previous behavior in the case of C output (specifically, when
  neither %language or %skeleton or equivalent command-line options
  are used) to leave more time for grammars depending on the old
@@ -514,7 +610,7 @@ Bison News

    %define NAME "VALUE"

-** The directive `%pure-parser' is now deprecated in favor of:
+** The directive "%pure-parser" is now deprecated in favor of:

    %define api.pure

@@ -524,15 +620,15 @@ Bison News
 ** Push Parsing

  Bison can now generate an LALR(1) parser in C with a push interface.  That
-  is, instead of invoking `yyparse', which pulls tokens from `yylex', you can
-  push one token at a time to the parser using `yypush_parse', which will
+  is, instead of invoking "yyparse", which pulls tokens from "yylex", you can
+  push one token at a time to the parser using "yypush_parse", which will
  return to the caller after processing each token.  By default, the push
  interface is disabled.  Either of the following directives will enable it:

    %define api.push_pull "push" // Just push; does not require yylex.
    %define api.push_pull "both" // Push and pull; requires yylex.

-  See the new section `A Push Parser' in the Bison manual for details.
+  See the new section "A Push Parser" in the Bison manual for details.

  The current push parsing interface is experimental and may evolve.  More user
  feedback will help to stabilize it.
@@ -544,10 +640,10 @@ Bison News
 ** Java

  Bison can now generate an LALR(1) parser in Java.  The skeleton is
-  `data/lalr1.java'.  Consider using the new %language directive instead of
+  "data/lalr1.java".  Consider using the new %language directive instead of
  %skeleton to select it.

-  See the new section `Java Parsers' in the Bison manual for details.
+  See the new section "Java Parsers" in the Bison manual for details.

  The current Java interface is experimental and may evolve.  More user
  feedback will help to stabilize it.
@@ -562,7 +658,7 @@ Bison News
 ** XML Automaton Report

  Bison can now generate an XML report of the LALR(1) automaton using the new
-  `--xml' option.  The current XML schema is experimental and may evolve.  More
+  "--xml" option.  The current XML schema is experimental and may evolve.  More
  user feedback will help to stabilize it.

 ** The grammar file may now specify the name of the parser header file using
@@ -594,31 +690,31 @@ Bison News

    %define lr.keep_unreachable_states

-  See the %define entry in the `Bison Declaration Summary' in the Bison manual
+  See the %define entry in the "Bison Declaration Summary" in the Bison manual
  for further discussion.

-** Lookahead Set Correction in the `.output' Report
+** Lookahead Set Correction in the ".output" Report

-  When instructed to generate a `.output' file including lookahead sets
-  (using `--report=lookahead', for example), Bison now prints each reduction's
+  When instructed to generate a ".output" file including lookahead sets
+  (using "--report=lookahead", for example), Bison now prints each reduction's
  lookahead set only next to the associated state's one item that (1) is
  associated with the same rule as the reduction and (2) has its dot at the end
  of its RHS.  Previously, Bison also erroneously printed the lookahead set
  next to all of the state's other items associated with the same rule.  This
-  bug affected only the `.output' file and not the generated parser source
+  bug affected only the ".output" file and not the generated parser source
  code.

-** --report-file=FILE is a new option to override the default `.output' file
+** --report-file=FILE is a new option to override the default ".output" file
  name.

-** The `=' that used to be required in the following directives is now
+** The "=" that used to be required in the following directives is now
  deprecated:

    %file-prefix "parser"
    %name-prefix "c_"
    %output "parser.c"

-** An Alternative to `%{...%}' -- `%code QUALIFIER {CODE}'
+** An Alternative to "%{...%}" -- "%code QUALIFIER {CODE}"

  Bison 2.3a provided a new set of directives as a more flexible alternative to
  the traditional Yacc prologue blocks.  Those have now been consolidated into
@@ -626,14 +722,14 @@ Bison News
  the purpose of the code and thus the location(s) where Bison should generate
  it:

-    1. `%code          {CODE}' replaces `%after-header  {CODE}'
-    2. `%code requires {CODE}' replaces `%start-header  {CODE}'
-    3. `%code provides {CODE}' replaces `%end-header    {CODE}'
-    4. `%code top      {CODE}' replaces `%before-header {CODE}'
+    1. "%code          {CODE}" replaces "%after-header  {CODE}"
+    2. "%code requires {CODE}" replaces "%start-header  {CODE}"
+    3. "%code provides {CODE}" replaces "%end-header    {CODE}"
+    4. "%code top      {CODE}" replaces "%before-header {CODE}"

-  See the %code entries in section `Bison Declaration Summary' in the Bison
-  manual for a summary of the new functionality.  See the new section `Prologue
-  Alternatives' for a detailed discussion including the advantages of %code
+  See the %code entries in section "Bison Declaration Summary" in the Bison
+  manual for a summary of the new functionality.  See the new section "Prologue
+  Alternatives" for a detailed discussion including the advantages of %code
  over the traditional Yacc prologues.

  The prologue alternatives are experimental.  More user feedback will help to
@@ -656,24 +752,24 @@ Bison News
  sometimes prove to be false alarms in existing grammars employing the Yacc
  constructs $0 or $-N (where N is some positive integer).

-  To enable these warnings, specify the option `--warnings=midrule-values' or
-  `-W', which is a synonym for `--warnings=all'.
+  To enable these warnings, specify the option "--warnings=midrule-values" or
+  "-W", which is a synonym for "--warnings=all".

-** Default %destructor or %printer with `<*>' or `<>'
+** Default %destructor or %printer with "<*>" or "<>"

  Bison now recognizes two separate kinds of default %destructor's and
  %printer's:

-    1. Place `<*>' in a %destructor/%printer symbol list to define a default
+    1. Place "<*>" in a %destructor/%printer symbol list to define a default
       %destructor/%printer for all grammar symbols for which you have formally
       declared semantic type tags.

-    2. Place `<>' in a %destructor/%printer symbol list to define a default
+    2. Place "<>" in a %destructor/%printer symbol list to define a default
       %destructor/%printer for all grammar symbols without declared semantic
       type tags.

-  Bison no longer supports the `%symbol-default' notation from Bison 2.3a.
-  `<*>' and `<>' combined achieve the same effect with one exception: Bison no
+  Bison no longer supports the "%symbol-default" notation from Bison 2.3a.
+  "<*>" and "<>" combined achieve the same effect with one exception: Bison no
  longer applies any %destructor to a mid-rule value if that mid-rule value is
  not actually ever referenced using either $$ or $n in a semantic action.

@@ -681,11 +777,11 @@ Bison News
  feedback will help to determine whether they should become permanent
  features.

-  See the section `Freeing Discarded Symbols' in the Bison manual for further
+  See the section "Freeing Discarded Symbols" in the Bison manual for further
  details.

 ** %left, %right, and %nonassoc can now declare token numbers.  This is required
-  by POSIX.  However, see the end of section `Operator Precedence' in the Bison
+  by POSIX.  However, see the end of section "Operator Precedence" in the Bison
  manual for a caveat concerning the treatment of literal strings.

 ** The nonfunctional --no-parser, -n, and %no-parser options have been
@@ -719,17 +815,17 @@ Bison News
    %destructor { } <character>

  guarantees that, when the parser discards any user-defined symbol that has a
-  semantic type tag other than `<character>', it passes its semantic value to
-  `free'.  However, when the parser discards a `STRING1' or a `string1', it
-  also prints its line number to `stdout'.  It performs only the second
-  `%destructor' in this case, so it invokes `free' only once.
+  semantic type tag other than "<character>", it passes its semantic value to
+  "free".  However, when the parser discards a "STRING1" or a "string1", it
+  also prints its line number to "stdout".  It performs only the second
+  "%destructor" in this case, so it invokes "free" only once.

  [Although we failed to mention this here in the 2.3a release, the default
  %destructor's and %printer's were experimental, and they were rewritten in
  future versions.]

-** Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with `-y',
-  `--yacc', or `%yacc'), Bison no longer generates #define statements for
+** Except for LALR(1) parsers in C with POSIX Yacc emulation enabled (with "-y",
+  "--yacc", or "%yacc"), Bison no longer generates #define statements for
  associating token numbers with token names.  Removing the #define statements
  helps to sanitize the global namespace during preprocessing, but POSIX Yacc
  requires them.  Bison still generates an enum for token names in all cases.
@@ -738,7 +834,7 @@ Bison News
  potentially incompatible with previous releases of Bison.

  As before, you declare prologue blocks in your grammar file with the
-  `%{ ... %}' syntax.  To generate the pre-prologue, Bison concatenates all
+  "%{ ... %}" syntax.  To generate the pre-prologue, Bison concatenates all
  prologue blocks that you've declared before the first %union.  To generate
  the post-prologue, Bison concatenates all prologue blocks that you've
  declared after the first %union.
@@ -767,7 +863,7 @@ Bison News
       * the code file before the contents of the header file.  It does *not*
       * insert it into the header file.  This is a good place to put
       * #include's that you want at the top of your code file.  A common
-       * example is `#include "system.h"'.  */
+       * example is '#include "system.h"'.  */
    }
    %start-header {
      /* Bison inserts this block into both the header file and the code file.
@@ -801,13 +897,13 @@ Bison News
  [Although we failed to mention this here in the 2.3a release, the prologue
  alternatives were experimental, and they were rewritten in future versions.]

-** The option `--report=look-ahead' has been changed to `--report=lookahead'.
+** The option "--report=look-ahead" has been changed to "--report=lookahead".
  The old spelling still works, but is not documented and may be removed
  in a future release.

 * Changes in version 2.3, 2006-06-05:

-** GLR grammars should now use `YYRECOVERING ()' instead of `YYRECOVERING',
+** GLR grammars should now use "YYRECOVERING ()" instead of "YYRECOVERING",
  for compatibility with LALR(1) grammars.

 ** It is now documented that any definition of YYSTYPE or YYLTYPE should
@@ -873,7 +969,7 @@ Bison News
  The %parse-params are available in the destructors (and the
  experimental printers) as per the documentation.

-** Bison now warns if it finds a stray `$' or `@' in an action.
+** Bison now warns if it finds a stray "$" or "@" in an action.

 ** %require "VERSION"
  This specifies that the grammar file depends on features implemented
@@ -882,16 +978,16 @@ Bison News
 ** lalr1.cc: The token and value types are now class members.
  The tokens were defined as free form enums and cpp macros.  YYSTYPE
  was defined as a free form union.  They are now class members:
-  tokens are enumerations of the `yy::parser::token' struct, and the
-  semantic values have the `yy::parser::semantic_type' type.
+  tokens are enumerations of the "yy::parser::token" struct, and the
+  semantic values have the "yy::parser::semantic_type" type.

  If you do not want or can update to this scheme, the directive
-  `%define "global_tokens_and_yystype" "1"' triggers the global
+  '%define "global_tokens_and_yystype" "1"' triggers the global
  definition of tokens and YYSTYPE.  This change is suitable both
  for previous releases of Bison, and this one.

  If you wish to update, then make sure older version of Bison will
-  fail using `%require "2.2"'.
+  fail using '%require "2.2"'.

 ** DJGPP support added.

@@ -959,10 +1055,10 @@ Bison News
  - A new directive "%expect-rr N" specifies the expected number of
    reduce/reduce conflicts in GLR parsers.

-  - %token numbers can now be hexadecimal integers, e.g., `%token FOO 0x12d'.
+  - %token numbers can now be hexadecimal integers, e.g., "%token FOO 0x12d".
    This is a GNU extension.

-  - The option `--report=lookahead' was changed to `--report=look-ahead'.
+  - The option "--report=lookahead" was changed to "--report=look-ahead".
    [However, this was changed back after 2.3.]

  - Experimental %destructor support has been added to lalr1.cc.
@@ -1010,10 +1106,10 @@ Bison News
    This reverts to the behavior of Bison 1.33 and earlier, and improves
    compatibility with Yacc.

-  - `parse error' -> `syntax error'
-    Bison now uniformly uses the term `syntax error'; formerly, the code
-    and manual sometimes used the term `parse error' instead.  POSIX
-    requires `syntax error' in diagnostics, and it was thought better to
+  - "parse error" -> "syntax error"
+    Bison now uniformly uses the term "syntax error"; formerly, the code
+    and manual sometimes used the term "parse error" instead.  POSIX
+    requires "syntax error" in diagnostics, and it was thought better to
    be consistent.

  - The documentation now emphasizes that yylex and yyerror must be
@@ -1026,7 +1122,7 @@ Bison News
    output as "foo\\bar.y".

  - Yacc command and library now available
-    The Bison distribution now installs a `yacc' command, as POSIX requires.
+    The Bison distribution now installs a "yacc" command, as POSIX requires.
    Also, Bison now installs a small library liby.a containing
    implementations of Yacc-compatible yyerror and main functions.
    This library is normally not useful, but POSIX requires it.
@@ -1039,20 +1135,20 @@ Bison News

 ** Other compatibility issues

-  - %union directives can now have a tag before the `{', e.g., the
-    directive `%union foo {...}' now generates the C code
-    `typedef union foo { ... } YYSTYPE;'; this is for Yacc compatibility.
-    The default union tag is `YYSTYPE', for compatibility with Solaris 9 Yacc.
-    For consistency, YYLTYPE's struct tag is now `YYLTYPE' not `yyltype'.
+  - %union directives can now have a tag before the "{", e.g., the
+    directive "%union foo {...}" now generates the C code
+    "typedef union foo { ... } YYSTYPE;"; this is for Yacc compatibility.
+    The default union tag is "YYSTYPE", for compatibility with Solaris 9 Yacc.
+    For consistency, YYLTYPE's struct tag is now "YYLTYPE" not "yyltype".
    This is for compatibility with both Yacc and Bison 1.35.

-  - `;' is output before the terminating `}' of an action, for
+  - ";" is output before the terminating "}" of an action, for
    compatibility with Bison 1.35.

  - Bison now uses a Yacc-style format for conflict reports, e.g.,
-    `conflicts: 2 shift/reduce, 1 reduce/reduce'.
+    "conflicts: 2 shift/reduce, 1 reduce/reduce".

-  - `yystype' and `yyltype' are now obsolescent macros instead of being
+  - "yystype" and "yyltype" are now obsolescent macros instead of being
    typedefs or tags; they are no longer documented and are planned to be
    withdrawn in a future release.

@@ -1060,13 +1156,13 @@ Bison News

  - GLR and inline
    Users of Bison have to decide how they handle the portability of the
-    C keyword `inline'.
+    C keyword "inline".

-  - `parsing stack overflow...' -> `parser stack overflow'
-    GLR parsers now report `parser stack overflow' as per the Bison manual.
+  - "parsing stack overflow..." -> "parser stack overflow"
+    GLR parsers now report "parser stack overflow" as per the Bison manual.

 ** Bison now warns if it detects conflicting outputs to the same file,
-  e.g., it generates a warning for `bison -d -o foo.h foo.y' since
+  e.g., it generates a warning for "bison -d -o foo.h foo.y" since
  that command outputs both code and header to foo.h.

 ** #line in output files
@@ -1123,8 +1219,8 @@ Bison News

 ** Output Directory
  When not in Yacc compatibility mode, when the output file was not
-  specified, running `bison foo/bar.y' created `foo/bar.c'.  It
-  now creates `bar.c'.
+  specified, running "bison foo/bar.y" created "foo/bar.c".  It
+  now creates "bar.c".

 ** Undefined token
  The undefined token was systematically mapped to 2 which prevented
@@ -1141,11 +1237,11 @@ Bison News
  will be mapped onto another number.

 ** Verbose error messages
-  They no longer report `..., expecting error or...' for states where
+  They no longer report "..., expecting error or..." for states where
  error recovery is possible.

 ** End token
-  Defaults to `$end' instead of `$'.
+  Defaults to "$end" instead of "$".

 ** Error recovery now conforms to documentation and to POSIX
  When a Bison-generated parser encounters a syntax error, it now pops
@@ -1182,7 +1278,7 @@ Bison News
  Rules that can never be reduced because of conflicts are now
  reported.

-** Incorrect `Token not used'
+** Incorrect "Token not used"
  On a grammar such as

           %token useless useful
@@ -1190,7 +1286,7 @@ Bison News
           exp: '0' %prec useful;

  where a token was used to set the precedence of the last rule,
-  bison reported both `useful' and `useless' as useless tokens.
+  bison reported both "useful" and "useless" as useless tokens.

 ** Revert the C++ namespace changes introduced in 1.31
  as they caused too many portability hassles.
@@ -1204,7 +1300,7 @@ Bison News
 ** Token end-of-file
  The token end of file may be specified by the user, in which case,
  the user symbol is used in the reports, the graphs, and the verbose
-  error messages instead of `$end', which remains being the default.
+  error messages instead of "$end", which remains being the default.
  For instance
     %token MYEOF 0
  or
@@ -1218,7 +1314,10 @@ Bison News
  Croatian, thanks to Denis Lackovic.

 ** Incorrect token definitions
-  When given `%token 'a' "A"', Bison used to output `#define 'a' 65'.
+  When given
+    %token 'a' "A"
+  bison used to output
+    #define 'a' 65

 ** Token definitions as enums
  Tokens are output both as the traditional #define's, and, provided
@@ -1230,7 +1329,7 @@ Bison News
  produces additional information:
  - itemset
    complete the core item sets with their closure
-  - lookahead [changed to `look-ahead' in 1.875e through 2.3, but changed back]
+  - lookahead [changed to "look-ahead" in 1.875e through 2.3, but changed back]
    explicitly associate lookahead tokens to items
  - solved
    describe shift/reduce conflicts solving.
@@ -1268,9 +1367,9 @@ Bison News

 ** File name clashes are detected
  $ bison foo.y -d -o foo.x
-  fatal error: header and parser would both be named `foo.x'
+  fatal error: header and parser would both be named "foo.x"

-** A missing `;' at the end of a rule triggers a warning
+** A missing ";" at the end of a rule triggers a warning
  In accordance with POSIX, and in agreement with other
  Yacc implementations, Bison will mandate this semicolon in the near
  future.  This eases the implementation of a Bison parser of Bison
@@ -1309,7 +1408,7 @@ Bison News
  GNU Gettext asserts 10 s/r conflicts, but there are 7.  Now that
  Bison dies on incorrect %expectations, we fear there will be
  too many bug reports for Gettext, so _for the time being_, %expect
-  does not trigger an error when the input file is named `plural.y'.
+  does not trigger an error when the input file is named "plural.y".

 ** Use of alloca in parsers
  If YYSTACK_USE_ALLOCA is defined to 0, then the parsers will use
@@ -1386,15 +1485,15 @@ Bison News
  New.

 ** --output
-  New, aliasing `--output-file'.
+  New, aliasing "--output-file".

 * Changes in version 1.30, 2001-10-26:

-** `--defines' and `--graph' have now an optional argument which is the
-  output file name. `-d' and `-g' do not change; they do not take any
+** "--defines" and "--graph" have now an optional argument which is the
+  output file name. "-d" and "-g" do not change; they do not take any
  argument.

-** `%source_extension' and `%header_extension' are removed, failed
+** "%source_extension" and "%header_extension" are removed, failed
  experiment.

 ** Portability fixes.
@@ -1404,9 +1503,9 @@ Bison News
 ** The output file does not define const, as this caused problems when used
  with common autoconfiguration schemes.  If you still use ancient compilers
  that lack const, compile with the equivalent of the C compiler option
-  `-Dconst='.  autoconf's AC_C_CONST macro provides one way to do this.
+  "-Dconst=".  Autoconf's AC_C_CONST macro provides one way to do this.

-** Added `-g' and `--graph'.
+** Added "-g" and "--graph".

 ** The Bison manual is now distributed under the terms of the GNU FDL.

@@ -1418,18 +1517,18 @@ Bison News

 ** Added the old Bison reference card.

-** Added `--locations' and `%locations'.
+** Added "--locations" and "%locations".

-** Added `-S' and `--skeleton'.
+** Added "-S" and "--skeleton".

-** `%raw', `-r', `--raw' is disabled.
+** "%raw", "-r", "--raw" is disabled.

 ** Special characters are escaped when output.  This solves the problems
  of the #line lines with path names including backslashes.

 ** New directives.
-  `%yacc', `%fixed_output_files', `%defines', `%no_parser', `%verbose',
-  `%debug', `%source_extension' and `%header_extension'.
+  "%yacc", "%fixed_output_files", "%defines", "%no_parser", "%verbose",
+  "%debug", "%source_extension" and "%header_extension".

 ** @$
  Automatic location tracking.
@@ -1451,7 +1550,7 @@ Bison News

 * Changes in version 1.26:

-** Bison now uses automake.
+** Bison now uses Automake.

 ** New mailing lists: <[email protected]> and <[email protected]>.

@@ -1473,7 +1572,7 @@ the grammar file, and reports all the errors found in it.

 ** Tokens can now be specified as multiple-character strings: for
 example, you could use "<=" for a token which looks like <=, instead
-of chosing a name like LESSEQ.
+of choosing a name like LESSEQ.

 ** The %token_table declaration says to write a table of tokens (names
 and numbers) into the parser file.  The yylex function can use this
@@ -1508,13 +1607,9 @@ Line numbers in output file corrected.

 Output file does not redefine const for C++.

-Local Variables:
-mode: outline
-End:
-
 -----

-Copyright (C) 1995-2011 Free Software Foundation, Inc.
+Copyright (C) 1995-2012 Free Software Foundation, Inc.

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

@@ -1530,3 +1625,25 @@ 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/>.
+
+ LocalWords:  yacc YYBACKUP glr GCC lalr ArrayIndexOutOfBoundsException nullptr
+ LocalWords:  cplusplus liby rpl fprintf mfcalc Wyacc stmt cond expr mk sym lr
+ LocalWords:  IELR ielr Lookahead YYERROR nonassoc LALR's api lookaheads yychar
+ LocalWords:  destructor lookahead YYRHSLOC YYLLOC Rhs ifndef YYFAIL cpp sr rr
+ LocalWords:  preprocessor initializer Wno Wnone Werror FreeBSD prec livelocks
+ LocalWords:  Solaris AIX UX RHEL Tru LHS gcc's Wundef YYENABLE NLS YYLTYPE VCG
+ LocalWords:  yyerror cpp's Wunused yylval yylloc prepend yyparse yylex yypush
+ LocalWords:  Graphviz xml nonterminals midrule destructor's YYSTYPE typedef ly
+ LocalWords:  CHR chr printf stdout namespace preprocessing enum pre include's
+ LocalWords:  YYRECOVERING nonfree destructors YYABORT YYACCEPT params enums de
+ LocalWords:  struct yystype DJGPP lex param Haible NUM alloca YYSTACK NUL goto
+ LocalWords:  YYMAXDEPTH Unescaped UCNs YYLTYPE's yyltype typedefs inline Yaccs
+ LocalWords:  Heriyanto Reenable dprec Hilfinger Eggert MYEOF Folle Menezes EOF
+ LocalWords:  Lackovic define's itemset Groff Gettext malloc NEWS'ed YYDEBUG
+ LocalWords:  namespaces strerror const autoconfiguration Dconst Autoconf's FDL
+ LocalWords:  Automake TMPDIR LESSEQ
+
+Local Variables:
+mode: outline
+fill-column: 76
+End:
@@ -36,7 +36,7 @@ to the bison package.

 -----

-Copyright (C) 2002, 2005, 2009-2011 Free Software Foundation, Inc.
+Copyright (C) 2002, 2005, 2009-2012 Free Software Foundation, Inc.

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

@@ -44,7 +44,7 @@ End:

 -----

-Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2011 Free Software
+Copyright (C) 1992, 1998-1999, 2003-2005, 2008-2012 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, 2009-2011 Free Software Foundation, Inc.
+Copyright (C) 2002, 2004, 2009-2012 Free Software Foundation, Inc.

 This file is part of GNU Bison.

@@ -15,25 +15,16 @@ First, if it is a large change, you must make sure they have signed
 the appropriate paperwork.  Second, be sure to add their name and
 email address to THANKS.

-** If a change fixes a test, mention the test in the ChangeLog entry.
+** If a change fixes a test, mention the test in the commit message.

 ** Bug reports
-If somebody reports a new bug, mention his name in the ChangeLog entry
+If somebody reports a new bug, mention his name in the commit message
 and in the test case you write.  Put him into THANKS.

 The correct response to most actual bugs is to write a new test case
 which demonstrates the bug.  Then fix the bug, re-run the test suite,
 and check everything in.

-** You may find it useful to install the git-merge-changelog merge driver:
-
-  http://git.sv.gnu.org/gitweb/?p=gnulib.git;a=blob;f=lib/git-merge-changelog.c
-
-When following the generic installation instructions there, keep in mind that
-your clone of Bison's git repository already contains appropriate
-.gitattributes files, and running Bison's bootstrap script will make the
-necessary changes to .git/config.
-

 * Hacking

@@ -79,8 +70,9 @@ 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.
+Later, after synchronizing from the repository a plain 'make' should
+be sufficient.  Note, however, that when gnulib is updated, running
+'./bootstrap' again might be needed.

 ** First checkout

@@ -127,14 +119,14 @@ 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
+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'.
+run "git submodule update".

        $ git pull
        $ git submodule update
@@ -169,7 +161,7 @@ The autoconf files we use are currently:
        lib/m4sugar/m4sugar.m4
        lib/m4sugar/foreach.m4

-These files don't change very often in autoconf, so it should be
+These files don't change very often in Autoconf, so it should be
 relatively straight-forward to examine the differences in order to
 decide whether to update.

@@ -186,36 +178,48 @@ release:
  that 1. Bison compiles cleanly, 2. the parsers it produces compile
  cleanly too.

- Build with -DGNULIB_POSIXCHECK.  It suggests gnulib modules that can
-  fix portability issues.
+- Maybe build with -DGNULIB_POSIXCHECK, which suggests gnulib modules
+  that can fix portability issues.  See if you really want to pay
+  attention to its warnings; there's no need to obey blindly to it
+  (<http://lists.gnu.org/archive/html/bison-patches/2012-05/msg00057.html>).

- run `make maintainer-check' which:
-  - runs `valgrind -q bison' to run Bison under Valgrind.
+- Check with "make syntax-check" if there are issues diagnosed by
+  gnulib.
+
+- run "make maintainer-check" which:
+  - runs "valgrind -q bison" to run Bison under Valgrind.
  - runs the parsers under Valgrind.
  - runs the test suite with G++ as C compiler...

- run `make maintainer-push-check', which runs `make maintainer-check'
+- run "make maintainer-push-check", which runs "make maintainer-check"
  while activating the push implementation and its pull interface wrappers
  in many test cases that were originally written to exercise only the
  pull implementation.  This makes certain the push implementation can
  perform every task the pull implementation can.

- run `make maintainer-xml-check', which runs `make maintainer-check'
+- run "make maintainer-xml-check", which runs "make maintainer-check"
  while checking Bison's XML automaton report for every working grammar
  passed to Bison in the test suite.  The check just diffs the output of
  Bison's included XSLT style sheets with the output of --report=all and
  --graph.

+- running "make maintainer-release-check" takes care of running
+  maintainer-check, maintainer-push-check and maintainer-xml-check.
+
 - Change tests/atlocal/CFLAGS to add your preferred options.  For
-  instance, `-traditional' to check that the parsers are K&R.  Note
-  that it does not make sense for glr.c, which should be ANSI,
-  but currently is actually GNU C, nor for lalr1.cc.
+  instance, "-traditional" to check that the parsers are K&R.  Note
+  that it does not make sense for glr.c, which should be ANSI, but
+  currently is actually GNU C, nor for lalr1.cc.


 * Release Procedure
+This section needs to be updated to take into account features from
+gnulib.  In particular, be sure to read README-release.

 ** Update the submodules.  See above.

+** Update maintainer tools, such as Autoconf.  See above.
+
 ** 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
@@ -226,7 +230,7 @@ This helps: grep -l '\<_(' *
 See above.

 ** Update the foreign files
-Running `./bootstrap' in the top level should update them all for you.
+Running "./bootstrap" in the top level should update them all for you.
 This covers PO files too.  Sometimes a PO file contains problems that
 causes it to be rejected by recent Gettext releases; please report
 these to the Translation Project.
@@ -238,7 +242,7 @@ 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
+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
@@ -248,55 +252,58 @@ occurrences of PACKAGE_COPYRIGHT_YEAR in configure.ac.
 The version number, *and* the date of the release (including for
 betas).

-** Update ChangeLog
-Should have an entry similar to `Version 1.49b.'.
+** Mention the release name in a commit message
+Should have an entry similar to "Version 2.3b.".

 ** 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:
+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:

-  git tag -a v2.3b
-
-The log message can be simply:
-
-  Bison 2.3b
+  git tag -a v2.3b -m "Bison 2.3b."

 ** Push
-Once `make distcheck' passes, push your changes and the tag.
-`git push' without arguments will not push the tag.
+Once "make distcheck" passes, push your changes and the tag.
+"git push" without arguments will not push the tag.

-** make alpha
-FIXME: `make alpha' is not maintained and is broken.  These
-instructions need to be replaced or removed.
-
-Running `make alpha' is absolutely perfect for beta releases: it makes
-the tarballs, the xdeltas, and prepares (in /tmp/) a proto
-announcement.  It is so neat, that that's what I use anyway for
-genuine releases, but adjusting things by hand (e.g., the urls in the
-announcement file, the ChangeLog which is not needed etc.).
-
-If it fails, you're on your own...
-
-It requires GNU Make.
+** make alpha, beta, or release
+See README-release.

 ** Upload
-The generic GNU upload procedure is at:
+There are two ways to upload the tarballs to the GNU servers: using
+gnupload (from gnulib), or by hand.  Obviously prefer the former.  But
+in either case, be sure to read the following paragraph.

-  http://www.gnu.org/prep/maintain/maintain.html#Automated-FTP-Uploads
+*** Setup
+You need "gnupg".

-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
+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.

+*** Using gnupload
+You need "ncftp".
+
+At the end "make release" (or alpha/beta) will display the prodecure
+to run.  Just copy and paste it in your shell.
+
+*** By hand
+
+The generic GNU upload procedure is at:
+
+  http://www.gnu.org/prep/maintain/maintain.html#Automated-FTP-Uploads
+
+Follow 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:

 *** make distcheck
 *** gpg -b bison-2.3b.tar.gz
-*** In a file named `bison-2.3b.tar.gz.directive', type:
+*** In a file named "bison-2.3b.tar.gz.directive", type:

      version: 1.1
      directory: bison
@@ -308,7 +315,7 @@ Here's a brief reminder of how to roll the tarballs and upload them:
 *** put bison-2.3b.tar.gz # This can take a while.
 *** put bison-2.3b.tar.gz.sig
 *** put bison-2.3b.tar.gz.directive.asc
-*** Repeat all these steps for bison-2.3b.tar.bz2.
+*** Repeat all these steps for bison-2.3b.tar.xz.

 ** Update Bison manual on www.gnu.org.

@@ -362,10 +369,10 @@ replaced with your key ID.
 Complete/fix the announcement file.  The generated list of recipients
 ([email protected], [email protected], [email protected],
 [email protected], and [email protected]) is
-appropriate for a stable release or a ``serious beta''.  For any other
-release, drop at least [email protected].  For an example of how to fill
-out the rest of the template, search the mailing list archives for the
-most recent release announcement.
+appropriate for a stable release or a "serious beta".  For any other
+release, drop at least [email protected].  For an example of how to
+fill out the rest of the template, search the mailing list archives
+for the most recent release announcement.

 For a stable release, send the same announcement on the comp.compilers
 newsgroup by sending email to [email protected].  Do not make any Cc as
@@ -373,7 +380,7 @@ the moderator will throw away anything cross-posted or Cc'ed.  It really
 needs to be a separate message.

 ** Bump the version number
-In configure.ac.  Run `make'.  So that developers don't accidentally add new
+In configure.ac.  Run "make".  So that developers don't accidentally add new
 items to the old NEWS entry, create a new empty NEWS entry something like:

  Changes in version ?.? (????-??-??):
@@ -383,7 +390,7 @@ Push these changes.

 -----

-Copyright (C) 2002-2005, 2007-2011 Free Software Foundation, Inc.
+Copyright (C) 2002-2005, 2007-2012 Free Software Foundation, Inc.

 This file is part of GNU Bison.

@@ -29,6 +29,7 @@ Csaba Raduly              [email protected]
 Dagobert Michelsen        [email protected]
 Daniel Hagerty            [email protected]
 David J. MacKenzie        [email protected]
+David Kastrup             [email protected]
 Derek M. Jones            [email protected]
 Di-an Jan                 [email protected]
 Dick Streefland           [email protected]
@@ -58,6 +59,7 @@ Juan Manuel Guerrero      [email protected]
 Kees Zeelenberg           [email protected]
 Keith Browne              [email protected]
 Laurent Mascherpa         [email protected]
+Lie Yan                   [email protected]
 Magnus Fromreide          [email protected]
 Marc Autret               [email protected]
 Martin Jacobs             [email protected]
@@ -95,17 +97,23 @@ Sebastian Setzer          [email protected]
 Sebastien Fricker         [email protected]
 Sergei Steshenko          [email protected]
 Shura                     [email protected]
+Stefano Lattarini         [email protected]
 Steve Murphy              [email protected]
 Summum Bonum              [email protected]
+Thiru Ramakrishnan        [email protected]
 Tim Josling               [email protected]
+Tim Landscheidt           [email protected]
 Tim Van Holder            [email protected]
 Tom Lane                  [email protected]
 Tom Tromey                [email protected]
 Tommy Nordgren            [email protected]
 Troy A. Johnson           [email protected]
-Tys Lefering              twlevo@gmail.com
+Tys Lefering              gccbison@gmail.com
 Vin Shelton               [email protected]
+W.C.A. Wijngaards         [email protected]
 Wayne Green               [email protected]
+Wei Song                  [email protected]
+Wolfgang S. Kechel        [email protected]
 Wolfram Wagner            [email protected]
 Wwp                       [email protected]
 Zack Weinberg             [email protected]
@@ -116,3 +124,22 @@ thank them!  Please, help us keeping this list up to date.
 Local Variables:
 mode: text
 End:
+
+-----
+
+Copyright (C) 2000-2012 Free Software Foundation, Inc.
+
+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
+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/>.
@@ -1,8 +1,129 @@
-*- outline -*-
+* Short term
+** Variable names.
+What should we name `variant' and `lex_symbol'?

-* Header guards
+** Use b4_symbol in all the skeleton
+Move its definition in the more standard places and deploy it in other
+skeletons.  Then remove the older system, including the tables
+generated by output.c

-From Franc,ois: should we keep the directory part in the CPP guard?
+** Update the documentation on gnu.org
+
+** Get rid of fake #lines [Bison: ...]
+Possibly as simple as checking whether the column number is nonnegative.
+
+I have seen messages like the following from GCC.
+
+<built-in>:0: fatal error: opening dependency file .deps/libltdl/argz.Tpo: No such file or directory
+
+
+** Discuss about %printer/%destroy in the case of C++.
+It would be very nice to provide the symbol classes with an operator<<
+and a destructor.  Unfortunately the syntax we have chosen for
+%destroy and %printer make them hard to reuse.  For instance, the user
+is invited to write something like
+
+   %printer { debug_stream() << $$; } <my_type>;
+
+which is hard to reuse elsewhere since it wants to use
+"debug_stream()" to find the stream to use.  The same applies to
+%destroy: we told the user she could use the members of the Parser
+class in the printers/destructors, which is not good for an operator<<
+since it is no longer bound to a particular parser, it's just a
+(standalone symbol).
+
+** Rename LR0.cc
+as lr0.cc, why upper case?
+
+** bench several bisons.
+Enhance bench.pl with %b to run different bisons.
+
+* Various
+** Warnings
+Warnings about type tags that are used in printer and dtors, but not
+for symbols?
+
+** YYERRCODE
+Defined to 256, but not used, not documented.  Probably the token
+number for the error token, which POSIX wants to be 256, but which
+Bison might renumber if the user used number 256.  Keep fix and doc?
+Throw away?
+
+Also, why don't we output the token name of the error token in the
+output?  It is explicitly skipped:
+
+      /* Skip error token and tokens without identifier.  */
+      if (sym != errtoken && id)
+
+Of course there are issues with name spaces, but if we disable we have
+something which seems to be more simpler and more consistent instead
+of the special case YYERRCODE.
+
+   enum yytokentype {
+     error = 256,
+     // ...
+   };
+
+
+We could (should?) also treat the case of the undef_token, which is
+numbered 257 for yylex, and 2 internal.  Both appear for instance in
+toknum:
+
+  const unsigned short int
+  parser::yytoken_number_[] =
+  {
+       0,   256,   257,   258,   259,   260,   261,   262,   263,   264,
+
+while here
+
+   enum yytokentype {
+     TOK_EOF = 0,
+     TOK_EQ = 258,
+
+so both 256 and 257 are "mysterious".
+
+  const char*
+  const parser::yytname_[] =
+  {
+  "\"end of command\"", "error", "$undefined", "\"=\"", "\"break\"",
+
+
+** YYFAIL
+It is seems to be *really* obsolete now, shall we remove it?
+
+** yychar == yyempty_
+The code in yyerrlab reads:
+
+      if (yychar <= YYEOF)
+        {
+          /* Return failure if at end of input.  */
+          if (yychar == YYEOF)
+            YYABORT;
+        }
+
+There are only two yychar that can be <= YYEOF: YYEMPTY and YYEOF.
+But I can't produce the situation where yychar is YYEMPTY here, is it
+really possible?  The test suite does not exercise this case.
+
+This shows that it would be interesting to manage to install skeleton
+coverage analysis to the test suite.
+
+** Table definitions
+It should be very easy to factor the definition of the various tables,
+including the separation bw declaration and definition.  See for
+instance b4_table_define in lalr1.cc.  This way, we could even factor
+C vs. C++ definitions.
+
+* From lalr1.cc to yacc.c
+** Single stack
+Merging the three stacks in lalr1.cc simplified the code, prompted for
+other improvements and also made it faster (probably because memory
+management is performed once instead of three times).  I suggest that
+we do the same in yacc.c.
+
+** yysyntax_error
+The code bw glr.c and yacc.c is really alike, we can certainly factor
+some parts.


 * Yacc.c: CPP Macros
@@ -11,19 +132,15 @@ Do some people use YYPURE, YYLSP_NEEDED like we do in the test suite?
 They should not: it is not documented.  But if they need to, let's
 find something clean (not like YYLSP_NEEDED...).

-
-* Installation
-
-* Documentation
-Before releasing, make sure the documentation ("Understanding your
-parser") refers to the current `output' format.
-
-* lalr1.cc
-** vector
-Move to using vector, drop stack.hh.
-
 * Report

+** Figures
+Some statistics about the grammar and the parser would be useful,
+especially when asking the user to send some information about the
+grammars she is working on.  We should probably also include some
+information about the variables (I'm not sure for instance we even
+specify what LR variant was used).
+
 **  GLR
 How would Paul like to display the conflicted actions?  In particular,
 what when two reductions are possible on a given lookahead token, but one is
@@ -52,36 +169,11 @@ DeRemer and Penello: they already provide the algorithm.

 * Extensions

-** Labeling the symbols
-Have a look at the Lemon parser generator: instead of $1, $2 etc. they
-can name the values.  This is much more pleasant.  For instance:
-
-       exp (res): exp (a) '+' exp (b) { $res = $a + $b; };
-
-I love this.  I have been bitten too often by the removal of the
-symbol, and forgetting to shift all the $n to $n-1.  If you are
-unlucky, it compiles...
-
-But instead of using $a etc., we can use regular variables.  And
-instead of using (), I propose to use `:' (again).  Paul suggests
-supporting `->' in addition to `:' to separate LHS and RHS. In other
-words:
-
-       r:exp -> a:exp '+' b:exp { r = a + b; };
-
-That requires an significant improvement of the grammar parser.  Using
-GLR would be nice.  It also requires that Bison know the type of the
-symbols (which will be useful for %include anyway).  So we have some
-time before...
-
-Note that there remains the problem of locations: `@r'?
-
-
 ** $-1
 We should find a means to provide an access to values deep in the
 stack.  For instance, instead of

-	baz: qux { $$ = $<foo>-1 + $<bar>0 + $1; }
+        baz: qux { $$ = $<foo>-1 + $<bar>0 + $1; }

 we should be able to have:

@@ -96,9 +188,6 @@ must be in the scanner: we must not parse what is in a switched off
 part of %if.  Akim Demaille thinks it should be in the parser, so as
 to avoid falling into another CPP mistake.

-** -D, --define-muscle NAME=VALUE
-To define muscles via cli.  Or maybe support directly NAME=VALUE?
-
 ** XML Output
 There are couple of available extensions of Bison targeting some XML
 output.  Some day we should consider including them.  One issue is
@@ -117,13 +206,13 @@ XML output for GNU Bison
 * Unit rules
 Maybe we could expand unit rules, i.e., transform

-	exp: arith | bool;
-	arith: exp '+' exp;
-	bool: exp '&' exp;
+        exp: arith | bool;
+        arith: exp '+' exp;
+        bool: exp '&' exp;

 into

-	exp: exp '+' exp | exp '&' exp;
+        exp: exp '+' exp | exp '&' exp;

 when there are no actions.  This can significantly speed up some
 grammars.  I can't find the papers.  In particular the book `LR
@@ -139,27 +228,22 @@ this issue.  Does anybody have it?
 Some history of Bison and some bibliography would be most welcome.
 Are there any Texinfo standards for bibliography?

-
-
-* Java, Fortran, etc.
-
-
 * Coding system independence
 Paul notes:

-	Currently Bison assumes 8-bit bytes (i.e. that UCHAR_MAX is
-	255).  It also assumes that the 8-bit character encoding is
-	the same for the invocation of 'bison' as it is for the
-	invocation of 'cc', but this is not necessarily true when
-	people run bison on an ASCII host and then use cc on an EBCDIC
-	host.  I don't think these topics are worth our time
-	addressing (unless we find a gung-ho volunteer for EBCDIC or
-	PDP-10 ports :-) but they should probably be documented
-	somewhere.
+        Currently Bison assumes 8-bit bytes (i.e. that UCHAR_MAX is
+        255).  It also assumes that the 8-bit character encoding is
+        the same for the invocation of 'bison' as it is for the
+        invocation of 'cc', but this is not necessarily true when
+        people run bison on an ASCII host and then use cc on an EBCDIC
+        host.  I don't think these topics are worth our time
+        addressing (unless we find a gung-ho volunteer for EBCDIC or
+        PDP-10 ports :-) but they should probably be documented
+        somewhere.

-	More importantly, Bison does not currently allow NUL bytes in
-	tokens, either via escapes (e.g., "x\0y") or via a NUL byte in
-	the source code.  This should get fixed.
+        More importantly, Bison does not currently allow NUL bytes in
+        tokens, either via escapes (e.g., "x\0y") or via a NUL byte in
+        the source code.  This should get fixed.

 * --graph
 Show reductions.
@@ -169,33 +253,6 @@ Show reductions.
 ** Skeleton strategy
 Must we keep %token-table?

-* src/print_graph.c
-Find the best graph parameters.
-
-* BTYacc
-See if we can integrate backtracking in Bison.  Charles-Henri de
-Boysson <[email protected]> is working on this, and already has some
-results.  Vadim Maslow, the maintainer of BTYacc was contacted, and we
-stay in touch with him.  Adjusting the Bison grammar parser will be
-needed to support some extra BTYacc features.  This is less urgent.
-
-** Keeping the conflicted actions
-First, analyze the differences between byacc and btyacc (I'm referring
-to the executables).  Find where the conflicts are preserved.
-
-** Compare with the GLR tables
-See how isomorphic the way BTYacc and the way the GLR adjustments in
-Bison are compatible.  *As much as possible* one should try to use the
-same implementation in the Bison executables.  I insist: it should be
-very feasible to use the very same conflict tables.
-
-** Adjust the skeletons
-Import the skeletons for C and C++.
-
-** Improve the skeletons
-Have them support yysymprint, yydestruct and so forth.
-
-
 * Precedence

 ** Partial order
@@ -203,15 +260,6 @@ It is unfortunate that there is a total order for precedence.  It
 makes it impossible to have modular precedence information.  We should
 move to partial orders (sounds like series/parallel orders to me).

-** Correlation b/w precedence and associativity
-Also, I fail to understand why we have to assign the same
-associativity to operators with the same precedence.  For instance,
-why can't I decide that the precedence of * and / is the same, but the
-latter is nonassoc?
-
-If there is really no profound motivation, we should find a new syntax
-to allow specifying this.
-
 ** RR conflicts
 See if we can use precedence between rules to solve RR conflicts.  See
 what POSIX says.
@@ -240,20 +288,6 @@ $<type_name>$ = $<type_name>1. I therefore think that one should implement
 a Bison option where every typed default rule is explicitly written out
 (same typed ruled can of course be grouped together).

-Note: Robert Anisko handles this.  He knows how to do it.
-
-
-* Warnings
-It would be nice to have warning support.  See how Autoconf handles
-them, it is fairly well described there.  It would be very nice to
-implement this in such a way that other programs could use
-lib/warnings.[ch].
-
-Don't work on this without first announcing you do, as I already have
-thought about it, and know many of the components that can be used to
-implement it.
-
-
 * Pre and post actions.
 From: Florian Krohm <[email protected]>
 Subject: YYACT_EPILOGUE
@@ -285,9 +319,32 @@ to bison. If you're interested, I'll work on a patch.
 * Better graphics
 Equip the parser with a means to create the (visual) parse tree.

+* Complaint submessage indentation.
+We already have an implementation that works fairly well for named
+reference messages, but it would be nice to use it consistently for all
+submessages from Bison.  For example, the "previous definition"
+submessage or the list of correct values for a %define variable might
+look better with indentation.
+
+However, the current implementation makes the assumption that the
+location printed on the first line is not usually much shorter than the
+locations printed on the submessage lines that follow.  That assumption
+may not hold true as often for some kinds of submessages especially if
+we ever support multiple grammar files.
+
+Here's a proposal for how a new implementation might look:
+
+  http://lists.gnu.org/archive/html/bison-patches/2009-09/msg00086.html
+
+
+Local Variables:
+mode: outline
+coding: utf-8
+End:
+
 -----

-Copyright (C) 2001-2004, 2006, 2008-2011 Free Software Foundation, Inc.
+Copyright (C) 2001-2004, 2006, 2008-2012 Free Software Foundation, Inc.

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

@@ -1,10 +1,10 @@
 #! /bin/sh
 # Print a version string.
-scriptversion=2011-04-05.18; # UTC
+scriptversion=2012-05-15.06; # UTC

 # Bootstrap this package from checked-out sources.

-# Copyright (C) 2003-2011 Free Software Foundation, Inc.
+# Copyright (C) 2003-2012 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
@@ -36,12 +36,12 @@ nl='
 LC_ALL=C
 export LC_ALL

+# Ensure that CDPATH is not set.  Otherwise, the output from cd
+# would cause trouble in at least one use below.
+(unset CDPATH) >/dev/null 2>&1 && unset CDPATH
+
 local_gl_dir=gl

-# Temporary directory names.
-bt='._bootmp'
-bt_regex=`echo "$bt"| sed 's/\./[.]/g'`
-bt2=${bt}2
 me=$0

 usage() {
@@ -88,9 +88,12 @@ gnulib_modules=
 # Any gnulib files needed that are not in modules.
 gnulib_files=

-# A function to be called to edit gnulib.mk right after it's created.
+: ${AUTOPOINT=autopoint}
+: ${AUTORECONF=autoreconf}
+
+# A function to be called right after gnulib-tool is run.
 # Override it via your own definition in bootstrap.conf.
-gnulib_mk_hook() { :; }
+bootstrap_post_import_hook() { :; }

 # A function to be called after everything else in this script.
 # Override it via your own definition in bootstrap.conf.
@@ -105,6 +108,11 @@ po_download_command_format=\
 "rsync --delete --exclude '*.s1' -Lrtvz \
 'translationproject.org::tp/latest/%s/' '%s'"

+# Fallback for downloading .po files (if rsync fails).
+po_download_command_format2=\
+"wget --mirror -nd -q -np -A.po -P '%s' \
+ http://translationproject.org/latest/%s/"
+
 extract_package_name='
  /^AC_INIT(/{
     /.*,.*,.*, */{
@@ -122,7 +130,7 @@ extract_package_name='
     p
  }
 '
-package=`sed -n "$extract_package_name" configure.ac` || exit
+package=$(sed -n "$extract_package_name" configure.ac) || exit
 gnulib_name=lib$package

 build_aux=build-aux
@@ -248,7 +256,7 @@ do
    usage
    exit;;
  --gnulib-srcdir=*)
-    GNULIB_SRCDIR=`expr "X$option" : 'X--gnulib-srcdir=\(.*\)'`;;
+    GNULIB_SRCDIR=${option#--gnulib-srcdir=};;
  --skip-po)
    SKIP_PO=t;;
  --force)
@@ -290,7 +298,7 @@ sort_patterns() {
    P
    x
    s/^\n//
-  }'
+  }' | sed '/^$/d'
 }

 # If $STR is not already on a line by itself in $FILE, insert it,
@@ -299,7 +307,7 @@ insert_sorted_if_absent() {
  file=$1
  str=$2
  test -f $file || touch $file
-  echo "$str" | sort_patterns - $file | cmp - $file > /dev/null \
+  echo "$str" | sort_patterns - $file | cmp -s - $file > /dev/null \
    || { echo "$str" | sort_patterns - $file > $file.bak \
      && mv $file.bak $file; } \
    || exit 1
@@ -312,10 +320,10 @@ insert_vc_ignore() {
  pattern="$2"
  case $vc_ignore_file in
  *.gitignore)
-    # A .gitignore entry that does not start with `/' applies
-    # recursively to subdirectories, so prepend `/' to every
+    # A .gitignore entry that does not start with '/' applies
+    # recursively to subdirectories, so prepend '/' to every
    # .gitignore entry.
-    pattern=`echo "$pattern" | sed s,^,/,`;;
+    pattern=$(echo "$pattern" | sed s,^,/,);;
  esac
  insert_sorted_if_absent "$vc_ignore_file" "$pattern"
 }
@@ -419,20 +427,50 @@ check_versions() {
      $use_git || continue
    fi
    # Honor $APP variables ($TAR, $AUTOCONF, etc.)
-    appvar=`echo $app | tr '[a-z]-' '[A-Z]_'`
+    appvar=$(echo $app | LC_ALL=C tr '[a-z]-' '[A-Z]_')
    test "$appvar" = TAR && appvar=AMTAR
-    eval "app=\${$appvar-$app}"
-    inst_ver=$(get_version $app)
-    if [ ! "$inst_ver" ]; then
-      echo "$me: Error: '$app' not found" >&2
-      ret=1
-    elif [ ! "$req_ver" = "-" ]; then
-      latest_ver=$(sort_ver $req_ver $inst_ver | cut -d' ' -f2)
-      if [ ! "$latest_ver" = "$inst_ver" ]; then
-        echo "$me: Error: '$app' version == $inst_ver is too old" >&2
-        echo "       '$app' version >= $req_ver is required" >&2
+    case $appvar in
+        GZIP) ;; # Do not use $GZIP:  it contains gzip options.
+        *) eval "app=\${$appvar-$app}" ;;
+    esac
+
+    # Handle the still-experimental Automake-NG programs specially.
+    # They remain named as the mainstream Automake programs ("automake",
+    # and "aclocal") to avoid gratuitous incompatibilities with
+    # pre-existing usages (by, say, autoreconf, or custom autogen.sh
+    # scripts), but correctly identify themselves (as being part of
+    # "GNU automake-ng") when asked their version.
+    case $app in
+      automake-ng|aclocal-ng)
+        app=${app%-ng}
+        ($app --version | grep '(GNU automake-ng)') >/dev/null 2>&1 || {
+          echo "$me: Error: '$app' not found or not from Automake-NG" >&2
+          ret=1
+          continue
+        } ;;
+    esac
+    if [ "$req_ver" = "-" ]; then
+      # Merely require app to exist; not all prereq apps are well-behaved
+      # so we have to rely on $? rather than get_version.
+      $app --version >/dev/null 2>&1
+      if [ 126 -le $? ]; then
+        echo "$me: Error: '$app' not found" >&2
        ret=1
      fi
+    else
+      # Require app to produce a new enough version string.
+      inst_ver=$(get_version $app)
+      if [ ! "$inst_ver" ]; then
+        echo "$me: Error: '$app' not found" >&2
+        ret=1
+      else
+        latest_ver=$(sort_ver $req_ver $inst_ver | cut -d' ' -f2)
+        if [ ! "$latest_ver" = "$inst_ver" ]; then
+          echo "$me: Error: '$app' version == $inst_ver is too old" >&2
+          echo "       '$app' version >= $req_ver is required" >&2
+          ret=1
+        fi
+      fi
    fi
  done

@@ -459,6 +497,30 @@ if test $use_libtool = 1; then
  find_tool LIBTOOLIZE glibtoolize libtoolize
 fi

+# gnulib-tool requires at least automake and autoconf.
+# If either is not listed, add it (with minimum version) as a prerequisite.
+case $buildreq in
+  *automake*) ;;
+  *) buildreq="automake 1.9
+$buildreq" ;;
+esac
+case $buildreq in
+  *autoconf*) ;;
+  *) buildreq="autoconf 2.59
+$buildreq" ;;
+esac
+
+# When we can deduce that gnulib-tool will require patch,
+# and when patch is not already listed as a prerequisite, add it, too.
+if test -d "$local_gl_dir" \
+    && ! find "$local_gl_dir" -name '*.diff' -exec false {} +; then
+  case $buildreq in
+    *patch*) ;;
+    *) buildreq="patch -
+$buildreq" ;;
+  esac
+fi
+
 if ! printf "$buildreq" | check_versions; then
  echo >&2
  if test -f README-prereq; then
@@ -495,7 +557,7 @@ git_modules_config () {
  test -f .gitmodules && git config --file .gitmodules "$@"
 }

-gnulib_path=`git_modules_config submodule.gnulib.path`
+gnulib_path=$(git_modules_config submodule.gnulib.path)
 test -z "$gnulib_path" && gnulib_path=gnulib

 # Get gnulib files.
@@ -560,7 +622,7 @@ if $bootstrap_sync; then
 fi

 gnulib_tool=$GNULIB_SRCDIR/gnulib-tool
-<$gnulib_tool || exit
+<$gnulib_tool || exit $?

 # Get translations.

@@ -568,7 +630,10 @@ download_po_files() {
  subdir=$1
  domain=$2
  echo "$me: getting translations into $subdir for $domain..."
-  cmd=`printf "$po_download_command_format" "$domain" "$subdir"`
+  cmd=$(printf "$po_download_command_format" "$domain" "$subdir")
+  eval "$cmd" && return
+  # Fallback to HTTP.
+  cmd=$(printf "$po_download_command_format2" "$subdir" "$domain")
  eval "$cmd"
 }

@@ -591,7 +656,7 @@ update_po_files() {
    && ls "$ref_po_dir"/*.po 2>/dev/null |
      sed 's|.*/||; s|\.po$||' > "$po_dir/LINGUAS" || return

-  langs=`cd $ref_po_dir && echo *.po|sed 's/\.po//g'`
+  langs=$(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
@@ -628,18 +693,18 @@ symlink_to_dir()

    # If the destination directory doesn't exist, create it.
    # This is required at least for "lib/uniwidth/cjk.h".
-    dst_dir=`dirname "$dst"`
+    dst_dir=$(dirname "$dst")
    if ! test -d "$dst_dir"; then
      mkdir -p "$dst_dir"

      # If we've just created a directory like lib/uniwidth,
      # tell version control system(s) it's ignorable.
      # FIXME: for now, this does only one level
-      parent=`dirname "$dst_dir"`
+      parent=$(dirname "$dst_dir")
      for dot_ig in x $vc_ignore; do
        test $dot_ig = x && continue
        ig=$parent/$dot_ig
-        insert_vc_ignore $ig `echo "$dst_dir"|sed 's,.*/,,'`
+        insert_vc_ignore $ig "${dst_dir##*/}"
      done
    fi

@@ -656,10 +721,18 @@ symlink_to_dir()
        cp -fp "$src" "$dst"
      }
    else
+      # Leave any existing symlink alone, if it already points to the source,
+      # so that broken build tools that care about symlink times
+      # aren't confused into doing unnecessary builds.  Conversely, if the
+      # existing symlink's time stamp is older than the source, make it afresh,
+      # so that broken tools aren't confused into skipping needed builds.  See
+      # <http://lists.gnu.org/archive/html/bug-gnulib/2011-05/msg00326.html>.
      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" = "$dst_i" || {
+      src_ls=$(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" = "$dst_i" &&
+      both_ls=$(ls -dt "$src" "$dst") &&
+      test "X$both_ls" = "X$dst$nl$src" || {
        dot_dots=
        case $src in
        /*) ;;
@@ -681,164 +754,94 @@ symlink_to_dir()
  }
 }

-cp_mark_as_generated()
-{
-  cp_src=$1
-  cp_dst=$2
-
-  if cmp -s "$cp_src" "$GNULIB_SRCDIR/$cp_dst"; then
-    symlink_to_dir "$GNULIB_SRCDIR" "$cp_dst"
-  elif cmp -s "$cp_src" "$local_gl_dir/$cp_dst"; then
-    symlink_to_dir $local_gl_dir "$cp_dst"
-  else
-    case $cp_dst in
-      *.[ch])             c1='/* '; c2=' */';;
-      *.texi)             c1='@c '; c2=     ;;
-      *.m4|*/Make*|Make*) c1='# ' ; c2=     ;;
-      *)                  c1=     ; c2=     ;;
-    esac
-
-    # If the destination directory doesn't exist, create it.
-    # This is required at least for "lib/uniwidth/cjk.h".
-    dst_dir=`dirname "$cp_dst"`
-    test -d "$dst_dir" || mkdir -p "$dst_dir"
-
-    if test -z "$c1"; then
-      cmp -s "$cp_src" "$cp_dst" || {
-        # Copy the file first to get proper permissions if it
-        # doesn't already exist.  Then overwrite the copy.
-        echo "$me: 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" "$cp_dst"
-      }
-    else
-      # Copy the file first to get proper permissions if it
-      # doesn't already exist.  Then overwrite the copy.
-      cp "$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"
-      ) > $cp_dst-t &&
-      if cmp -s "$cp_dst-t" "$cp_dst"; then
-        rm -f "$cp_dst-t"
-      else
-        echo "$me: cp $cp_src $cp_dst # with edits" &&
-        mv -f "$cp_dst-t" "$cp_dst"
-      fi
-    fi
-  fi
-}
-
 version_controlled_file() {
-  dir=$1
+  parent=$1
  file=$2
-  found=no
-  if test -d CVS; then
-    grep -F "/$file/" $dir/CVS/Entries 2>/dev/null |
-             grep '^/[^/]*/[0-9]' > /dev/null && found=yes
-  elif test -d .git; then
-    git rm -n "$dir/$file" > /dev/null 2>&1 && found=yes
+  if test -d .git; then
+    git rm -n "$file" > /dev/null 2>&1
  elif test -d .svn; then
-    svn log -r HEAD "$dir/$file" > /dev/null 2>&1 && found=yes
+    svn log -r HEAD "$file" > /dev/null 2>&1
+  elif test -d CVS; then
+    grep -F "/${file##*/}/" "$parent/CVS/Entries" 2>/dev/null |
+             grep '^/[^/]*/[0-9]' > /dev/null
  else
-    echo "$me: no version control for $dir/$file?" >&2
+    echo "$me: no version control for $file?" >&2
+    false
  fi
-  test $found = yes
 }

-slurp() {
-  for dir in . `(cd $1 && find * -type d -print)`; do
-    copied=
-    sep=
-    for file in `ls -a $1/$dir`; do
-      case $file in
-      .|..) continue;;
-      # FIXME: should all file names starting with "." be ignored?
-      .*) continue;;
-      esac
-      test -d $1/$dir/$file && continue
-      for excluded_file in $excluded_files; do
-        test "$dir/$file" = "$excluded_file" && continue 2
+# NOTE: we have to be careful to run both autopoint and libtoolize
+# before gnulib-tool, since gnulib-tool is likely to provide newer
+# versions of files "installed" by these two programs.
+# Then, *after* gnulib-tool (see below), we have to be careful to
+# run autoreconf in such a way that it does not run either of these
+# two just-pre-run programs.
+
+# Import from gettext.
+with_gettext=yes
+grep '^[	 ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null || \
+    with_gettext=no
+
+if test $with_gettext = yes || test $use_libtool = 1; then
+
+  tempbase=.bootstrap$$
+  trap "rm -f $tempbase.0 $tempbase.1" 1 2 13 15
+
+  > $tempbase.0 > $tempbase.1 &&
+  find . ! -type d -print | sort > $tempbase.0 || exit
+
+  if test $with_gettext = yes; then
+    # Released autopoint has the tendency to install macros that have been
+    # obsoleted in current gnulib, so run this before gnulib-tool.
+    echo "$0: $AUTOPOINT --force"
+    $AUTOPOINT --force || exit
+  fi
+
+  # Autoreconf runs aclocal before libtoolize, which causes spurious
+  # warnings if the initial aclocal is confused by the libtoolized
+  # (or worse out-of-date) macro directory.
+  # libtoolize 1.9b added the --install option; but we support back
+  # to libtoolize 1.5.22, where the install action was default.
+  if test $use_libtool = 1; then
+    install=
+    case $($LIBTOOLIZE --help) in
+      *--install*) install=--install ;;
+    esac
+    echo "running: $LIBTOOLIZE $install --copy"
+    $LIBTOOLIZE $install --copy
+  fi
+
+  find . ! -type d -print | sort >$tempbase.1
+  old_IFS=$IFS
+  IFS=$nl
+  for file in $(comm -13 $tempbase.0 $tempbase.1); do
+    IFS=$old_IFS
+    parent=${file%/*}
+    version_controlled_file "$parent" "$file" || {
+      for dot_ig in x $vc_ignore; do
+        test $dot_ig = x && continue
+        ig=$parent/$dot_ig
+        insert_vc_ignore "$ig" "${file##*/}"
      done
-      if test $file = Makefile.am && test "X$gnulib_mk" != XMakefile.am; then
-        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 "$me: Copying $1/$dir/$file to $dir/$gnulib_mk ..." &&
-          rm -f $dir/$gnulib_mk &&
-          sed "$remove_intl" $1/$dir/$file >$dir/$gnulib_mk &&
-          gnulib_mk_hook $dir/$gnulib_mk
-        }
-      elif { test "${2+set}" = set && test -r $2/$dir/$file; } ||
-           version_controlled_file $dir $file; then
-        echo "$me: $dir/$file overrides $1/$dir/$file"
-      else
-        copied=$copied$sep$file; sep=$nl
-        if test $file = gettext.m4; then
-          echo "$me: 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
-
-    for dot_ig in x $vc_ignore; do
-      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 .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.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
-}
+  IFS=$old_IFS

-
-# Create boot temporary directories to import from gnulib and gettext.
-rm -fr $bt $bt2 &&
-mkdir $bt $bt2 || exit
+  rm -f $tempbase.0 $tempbase.1
+  trap - 1 2 13 15
+fi

 # Import from gnulib.

 gnulib_tool_options="\
 --import\
 --no-changelog\
- --aux-dir $bt/$build_aux\
- --doc-base $bt/$doc_base\
+ --aux-dir $build_aux\
+ --doc-base $doc_base\
 --lib $gnulib_name\
- --m4-base $bt/$m4_base/\
- --source-base $bt/$source_base/\
- --tests-base $bt/$tests_base\
+ --m4-base $m4_base/\
+ --source-base $source_base/\
+ --tests-base $tests_base\
 --local-dir $local_gl_dir\
 $gnulib_tool_option_extras\
 "
@@ -850,25 +853,13 @@ if test $use_libtool = 1; then
 fi
 echo "$0: $gnulib_tool $gnulib_tool_options --import ..."
 $gnulib_tool $gnulib_tool_options --import $gnulib_modules &&
-slurp $bt || exit

 for file in $gnulib_files; do
  symlink_to_dir "$GNULIB_SRCDIR" $file || exit
 done

-
-# Import from gettext.
-with_gettext=yes
-grep '^[	 ]*AM_GNU_GETTEXT_VERSION(' configure.ac >/dev/null || \
-    with_gettext=no
-
-if test $with_gettext = yes; then
-  echo "$0: (cd $bt2; ${AUTOPOINT-autopoint}) ..."
-  cp configure.ac $bt2 &&
-  (cd $bt2 && ${AUTOPOINT-autopoint} && rm configure.ac) &&
-  slurp $bt2 $bt || exit
-fi
-rm -fr $bt $bt2 || exit
+bootstrap_post_import_hook \
+  || { echo >&2 "$me: bootstrap_post_import_hook failed"; exit 1; }

 # Remove any dangling symlink matching "*.m4" or "*.[ch]" in some
 # gnulib-populated directories.  Such .m4 files would cause aclocal to fail.
@@ -882,34 +873,27 @@ 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 \
-  "${ACLOCAL-aclocal} --force -I '$m4_base' $ACLOCAL_FLAGS" \
-  "${AUTOCONF-autoconf} --force" \
-  "${AUTOHEADER-autoheader} --force" \
-  "${AUTOMAKE-automake} --add-missing --copy --force-missing"
-do
-  if test "$command" = libtool; then
-    test $use_libtool = 0 \
-      && continue
-    command="${LIBTOOLIZE-libtoolize} -c -f"
-  fi
-  echo "$0: $command ..."
-  eval "$command" || exit
-done
+# Some systems (RHEL 5) are using ancient autotools, for which the
+# --no-recursive option had not been invented.  Detect that lack and
+# omit the option when it's not supported.  FIXME in 2017: remove this
+# hack when RHEL 5 autotools are updated, or when they become irrelevant.
+no_recursive=
+case $($AUTORECONF --help) in
+  *--no-recursive*) no_recursive=--no-recursive;;
+esac

+# Tell autoreconf not to invoke autopoint or libtoolize; they were run above.
+echo "running: AUTOPOINT=true LIBTOOLIZE=true " \
+    "$AUTORECONF --verbose --install $no_recursive -I $m4_base $ACLOCAL_FLAGS"
+AUTOPOINT=true LIBTOOLIZE=true \
+    $AUTORECONF --verbose --install $no_recursive -I $m4_base $ACLOCAL_FLAGS \
+  || exit 1

 # Get some extra files from gnulib, overriding existing files.
 for file in $gnulib_extra_files; do
  case $file in
  */INSTALL) dst=INSTALL;;
-  build-aux/*) dst=$build_aux/`expr "$file" : 'build-aux/\(.*\)'`;;
+  build-aux/*) dst=$build_aux/${file#build-aux/};;
  *) dst=$file;;
  esac
  symlink_to_dir "$GNULIB_SRCDIR" $file $dst || exit
@@ -930,6 +914,16 @@ if test $with_gettext = yes; then
    }
  ' po/Makevars.template >po/Makevars || exit 1

+  # If the 'gettext' module is in use, grab the latest Makefile.in.in.
+  # If only the 'gettext-h' module is in use, assume autopoint already
+  # put the correct version of this file into place.
+  case $gnulib_modules in
+  *gettext-h*) ;;
+  *gettext*)
+    cp $GNULIB_SRCDIR/build-aux/po/Makefile.in.in po/Makefile.in.in || exit 1
+    ;;
+  esac
+
  if test -d runtime-po; then
    # Similarly for runtime-po/Makevars, but not quite the same.
    rm -f runtime-po/Makevars
@@ -1,6 +1,6 @@
 # Bootstrap configuration.

-# Copyright (C) 2006-2011 Free Software Foundation, Inc.
+# Copyright (C) 2006-2012 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
@@ -17,14 +17,22 @@

 # gnulib modules used by this package.
 gnulib_modules='
-  announce-gen argmatch assert calloc-posix close config-h c-strcase
-  configmake dirname error extensions fopen-safer gendocs getopt-gnu
-  gettext git-version-gen hash inttypes isnan javacomp-script
+  announce-gen argmatch assert calloc-posix close closeout config-h c-strcase
+  configmake
+  dirname
+  do-release-commit-and-tag
+  error extensions fdl fopen-safer gendocs getopt-gnu
+  gettext git-version-gen gitlog-to-changelog
+  gpl-3.0 hash inttypes isnan javacomp-script
  javaexec-script ldexpl maintainer-makefile malloc-gnu mbschr mbsrchr
-  mbswidth obstack perror pipe-posix quote quotearg realloc-posix
+  mbswidth obstack perror progname
+  quote quotearg
+  readme-release
+  realloc-posix
  spawn-pipe stdbool stpcpy strdup-posix strerror strtoul strverscmp
  unistd unistd-safer unlocked-io update-copyright unsetenv verify
-  warnings xalloc xalloc-die xstrndup
+  warnings
+  xalloc xalloc-die xmemdup0 xstrndup

  fprintf-posix printf-posix snprintf-posix sprintf-posix
  vsnprintf-posix vsprintf-posix
@@ -60,11 +68,21 @@ excluded_files='
    m4/visibility.m4
 '

+gnulib_tool_option_extras='--symlink --makefile-name=gnulib.mk'
+
+bootstrap_post_import_hook()
+{
+  # Ensure that ChangeLog exists, for automake.
+  test -f ChangeLog || touch ChangeLog
+}
+
 bootstrap_epilogue()
 {
  # Make sure we don't need src/bison, which usually doesn't exist at
  # the time of a bootstrap.
  touch src/parse-gram.[ch]
+
+  perl -pi -e "s/\@PACKAGE\@/$package/g" README-release
 }

 # Keep our bootstrap script in sync with gnulib's.  If we ever need to
@@ -1,4 +1,3 @@
-
 /Makefile
 /Makefile.in
 /announce-gen
@@ -11,6 +10,7 @@
 /depcomp
 /gendocs.sh
 /git-version-gen
+/gitlog-to-changelog
 /install-sh
 /javacomp.sh.in
 /javaexec.sh.in
@@ -23,4 +23,4 @@
 /vc-list-files
 /warn-on-use.h
 /ylwrap
-
+/do-release-commit-and-tag
@@ -0,0 +1,3 @@
+# This file is expected to be used via gitlog-to-changelog's --amend=FILE
+# option.  It specifies what changes to make to each given SHA1's commit
+# log and metadata, using Perl-eval'able expressions.
@@ -3,7 +3,7 @@
 # Update b4_copyright invocations or b4_copyright_years definitions to
 # include the current year.

-# Copyright (C) 2009-2011 Free Software Foundation, Inc.
+# Copyright (C) 2009-2012 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 @@

 # In configure.ac, update PACKAGE_COPYRIGHT_YEAR to the current year.

-# Copyright (C) 2010-2011 Free Software Foundation, Inc.
+# Copyright (C) 2010-2012 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 @@
 # Customize maint.mk                           -*- makefile -*-

-# Copyright (C) 2008-2011 Free Software Foundation, Inc.
+# Copyright (C) 2008-2012 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
@@ -36,7 +36,12 @@ url_dir_list = \
 # Exclude changelog-check here so that there's less churn in ChangeLog
 # files -- otherwise, you'd need to have the upcoming version number
 # at the top of the file for each `make distcheck' run.
-local-checks-to-skip = changelog-check
+local-checks-to-skip = \
+  changelog-check \
+  sc_immutable_NEWS			\
+  sc_prohibit_always_true_header_tests	\
+  sc_prohibit_atoi_atof			\
+  sc_prohibit_strcmp

 # The local directory containing the checked-out copy of gnulib used in
 # this release.  Used solely to get a date for the "announcement" target.
@@ -51,3 +56,18 @@ announcement_Cc_ = \
 update-copyright: update-b4-copyright update-package-copyright-year
 update-copyright-env = \
  UPDATE_COPYRIGHT_FORCE=1 UPDATE_COPYRIGHT_USE_INTERVALS=1
+
+exclude = $(foreach a,$(1),$(eval exclude_file_name_regexp--sc_$(a)))
+$(call exclude,								\
+  bindtextdomain=^lib/main.c$$						\
+  program_name=^lib/main.c$$						\
+  prohibit_always-defined_macros=^data/yacc.c|^djgpp/			\
+  prohibit_always-defined_macros+=?|^lib/timevar.c$$			\
+  prohibit_always-defined_macros+=?|^src/(parse-gram.c|system.h)$$	\
+  prohibit_always-defined_macros+=?|^tests/regression.at$$		\
+  prohibit_empty_lines_at_EOF=^src/parse-gram.[ch]$$			\
+  require_config_h_first=^(lib/yyerror|data/(glr|yacc))\.c$$		\
+  space_tab=^tests/(input|c\+\+)\.at$$					\
+  trailing_blank=^src/parse-gram.[ch]$$					\
+  unmarked_diagnostics=^djgpp/						\
+)
@@ -1,292 +0,0 @@
-/* config.hin.  Generated from configure.in by autoheader.  */
-
-/* Define to one of `_getb67', `GETB67', `getb67' for Cray-2 and Cray-YMP
-   systems. This function is required for `alloca.c' support on those systems.
-   */
-#undef CRAY_STACKSEG_END
-
-/* Define if using `alloca.c'. */
-#undef C_ALLOCA
-
-/* Define to 1 if translation of program messages to the user's native
-   language is requested. */
-#undef ENABLE_NLS
-
-/* Define if you have `alloca', as a function or macro. */
-#undef HAVE_ALLOCA
-
-/* Define if you have <alloca.h> and it should be used (not on Ultrix). */
-#undef HAVE_ALLOCA_H
-
-/* Define if you have the <argz.h> header file. */
-#undef HAVE_ARGZ_H
-
-/* Define if you have the <ctype.h> header file. */
-#undef HAVE_CTYPE_H
-
-/* Define if backslash-a works in C strings. */
-#undef HAVE_C_BACKSLASH_A
-
-/* Define if you have the `dcgettext' function. */
-#undef HAVE_DCGETTEXT
-
-/* Define to 1 if you have the declaration of `memchr', and to 0 if you don't.
-   */
-#undef HAVE_DECL_MEMCHR
-
-/* Define to 1 if you have the declaration of `stpcpy', and to 0 if you don't.
-   */
-#undef HAVE_DECL_STPCPY
-
-/* Define to 1 if you have the declaration of `strerror_r', and to 0 if you
-   don't. */
-#undef HAVE_DECL_STRERROR_R
-
-/* Define to 1 if you have the declaration of `strndup', and to 0 if you
-   don't. */
-#undef HAVE_DECL_STRNDUP
-
-/* Define to 1 if you have the declaration of `strnlen', and to 0 if you
-   don't. */
-#undef HAVE_DECL_STRNLEN
-
-/* Define if the malloc check has been performed. */
-#undef HAVE_DONE_WORKING_MALLOC_CHECK
-
-/* Define if the realloc check has been performed. */
-#undef HAVE_DONE_WORKING_REALLOC_CHECK
-
-/* Define if you have the `doprnt' function. */
-#undef HAVE_DOPRNT
-
-/* Define if you have the `feof_unlocked' function. */
-#undef HAVE_FEOF_UNLOCKED
-
-/* Define if you have the `fgets_unlocked' function. */
-#undef HAVE_FGETS_UNLOCKED
-
-/* Define if you have the `getcwd' function. */
-#undef HAVE_GETCWD
-
-/* Define if you have the `getegid' function. */
-#undef HAVE_GETEGID
-
-/* Define if you have the `geteuid' function. */
-#undef HAVE_GETEUID
-
-/* Define if you have the `getgid' function. */
-#undef HAVE_GETGID
-
-/* Define if you have the `getpagesize' function. */
-#undef HAVE_GETPAGESIZE
-
-/* Define if the GNU gettext() function is already present or preinstalled. */
-#undef HAVE_GETTEXT
-
-/* Define if you have the `getuid' function. */
-#undef HAVE_GETUID
-
-/* Define if you have the iconv() function. */
-#undef HAVE_ICONV
-
-/* Define if you have the <inttypes.h> header file. */
-#undef HAVE_INTTYPES_H
-
-/* Define if you have the `isascii' function. */
-#undef HAVE_ISASCII
-
-/* Define if you have the `iswprint' function. */
-#undef HAVE_ISWPRINT
-
-/* Define if you have <langinfo.h> and nl_langinfo(CODESET). */
-#undef HAVE_LANGINFO_CODESET
-
-/* Define if your <locale.h> file defines LC_MESSAGES. */
-#undef HAVE_LC_MESSAGES
-
-/* Define if you have the <limits.h> header file. */
-#undef HAVE_LIMITS_H
-
-/* Define if you have the <locale.h> header file. */
-#undef HAVE_LOCALE_H
-
-/* Define if you have the <malloc.h> header file. */
-#undef HAVE_MALLOC_H
-
-/* Define to 1 if mbrtowc and mbstate_t are properly declared. */
-#undef HAVE_MBRTOWC
-
-/* Define if you have the `mbsinit' function. */
-#undef HAVE_MBSINIT
-
-/* Define if you have the `memchr' function. */
-#undef HAVE_MEMCHR
-
-/* Define if you have the <memory.h> header file. */
-#undef HAVE_MEMORY_H
-
-/* Define if you have the `mempcpy' function. */
-#undef HAVE_MEMPCPY
-
-/* Define if you have the `mkstemp' function. */
-#undef HAVE_MKSTEMP
-
-/* Define if you have a working `mmap' system call. */
-#undef HAVE_MMAP
-
-/* Define if you have the `munmap' function. */
-#undef HAVE_MUNMAP
-
-/* Define if you have the <nl_types.h> header file. */
-#undef HAVE_NL_TYPES_H
-
-/* Define if you have the `putenv' function. */
-#undef HAVE_PUTENV
-
-/* Define if you have the `setenv' function. */
-#undef HAVE_SETENV
-
-/* Define if you have the `setlocale' function. */
-#undef HAVE_SETLOCALE
-
-/* Define if you have the <stddef.h> header file. */
-#undef HAVE_STDDEF_H
-
-/* Define if you have the <stdint.h> header file. */
-#undef HAVE_STDINT_H
-
-/* Define if you have the <stdlib.h> header file. */
-#undef HAVE_STDLIB_H
-
-/* Define if you have the `stpcpy' function. */
-#undef HAVE_STPCPY
-
-/* Define if you have the `strcasecmp' function. */
-#undef HAVE_STRCASECMP
-
-/* Define if you have the `strchr' function. */
-#undef HAVE_STRCHR
-
-/* Define if you have the `strdup' function. */
-#undef HAVE_STRDUP
-
-/* Define if you have the `strerror' function. */
-#undef HAVE_STRERROR
-
-/* Define if you have the `strerror_r' function. */
-#undef HAVE_STRERROR_R
-
-/* Define if you have the <strings.h> header file. */
-#undef HAVE_STRINGS_H
-
-/* Define if you have the <string.h> header file. */
-#undef HAVE_STRING_H
-
-/* Define if you have the `strndup' function. */
-#undef HAVE_STRNDUP
-
-/* Define if you have the `strnlen' function. */
-#undef HAVE_STRNLEN
-
-/* Define if you have the `strspn' function. */
-#undef HAVE_STRSPN
-
-/* Define if you have the `strtoul' function. */
-#undef HAVE_STRTOUL
-
-/* Define if you have the <sys/param.h> header file. */
-#undef HAVE_SYS_PARAM_H
-
-/* Define if you have the <sys/stat.h> header file. */
-#undef HAVE_SYS_STAT_H
-
-/* Define if you have the <sys/types.h> header file. */
-#undef HAVE_SYS_TYPES_H
-
-/* Define if you have the `tsearch' function. */
-#undef HAVE_TSEARCH
-
-/* Define if you have the <unistd.h> header file. */
-#undef HAVE_UNISTD_H
-
-/* Define if you have the `vprintf' function. */
-#undef HAVE_VPRINTF
-
-/* Define if you have the <wchar.h> header file. */
-#undef HAVE_WCHAR_H
-
-/* Define if you have the <wctype.h> header file. */
-#undef HAVE_WCTYPE_H
-
-/* Define to 1 if `strerror_r' returns a string. */
-#undef HAVE_WORKING_STRERROR_R
-
-/* Define if you have the `__argz_count' function. */
-#undef HAVE___ARGZ_COUNT
-
-/* Define if you have the `__argz_next' function. */
-#undef HAVE___ARGZ_NEXT
-
-/* Define if you have the `__argz_stringify' function. */
-#undef HAVE___ARGZ_STRINGIFY
-
-/* Define as const if the declaration of iconv() needs const. */
-#undef ICONV_CONST
-
-/* Name of package */
-#undef PACKAGE
-
-/* Define if compiler has function prototypes */
-#undef PROTOTYPES
-
-/* If using the C implementation of alloca, define if you know the
-   direction of stack growth for your system; otherwise it will be
-   automatically deduced at run-time.
-        STACK_DIRECTION > 0 => grows toward higher addresses
-        STACK_DIRECTION < 0 => grows toward lower addresses
-        STACK_DIRECTION = 0 => direction of growth unknown */
-#undef STACK_DIRECTION
-
-/* Define if you have the ANSI C header files. */
-#undef STDC_HEADERS
-
-/* Version number of package */
-#undef VERSION
-
-/* Define if using the dmalloc debugging malloc package */
-#undef WITH_DMALLOC
-
-/* Define to 1 for GNU C library extensions. */
-#undef _GNU_SOURCE
-
-/* Define if on MINIX. */
-#undef _MINIX
-
-/* Define if the system does not provide POSIX.1 features except with this
-   defined. */
-#undef _POSIX_1_SOURCE
-
-/* Define if you need to in order for `stat' and other things to work. */
-#undef _POSIX_SOURCE
-
-/* Define to empty if `const' does not conform to ANSI C. */
-#undef const
-
-/* Define as `__inline' if that's what the C compiler calls it, or to nothing
-   if it is not supported. */
-#undef inline
-
-/* Define to rpl_malloc if the replacement function should be used. */
-#undef malloc
-
-/* Define to a type if <wchar.h> does not define. */
-#undef mbstate_t
-
-/* Define to `long' if <sys/types.h> does not define. */
-#undef off_t
-
-/* Define to rpl_realloc if the replacement function should be used. */
-#undef realloc
-
-/* Define to `unsigned' if <sys/types.h> does not define. */
-#undef size_t
@@ -1,6 +1,6 @@
 # Configure template for GNU Bison.                   -*-Autoconf-*-
 #
-# Copyright (C) 2001-2011 Free Software Foundation, Inc.
+# Copyright (C) 2001-2012 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
@@ -17,15 +17,18 @@

 # In order for some versions of Sun Studio to compile our C++ test cases
 # correctly, we need Autoconf 2.64 or better to handle the restrict
-# keyword in at least string.h from gnulib.
-AC_PREREQ(2.64)
+# keyword in at least string.h from gnulib.  We need Autoconf 2.68 or
+# better to avoid a typo in the `configure --help' entry for the YACC
+# environment variable.
+AC_PREREQ([2.68])
+m4_pattern_forbid([^gl_[A-Z]])

 AC_INIT([GNU Bison],
        m4_esyscmd([build-aux/git-version-gen .tarball-version]),
        [[email protected]])
-AC_DEFINE([PACKAGE_COPYRIGHT_YEAR], [2011],
-          [The copyright year for this package])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2011])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2012])
+AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
+                   [The copyright year for this package])

 AC_CONFIG_AUX_DIR([build-aux])
 AC_CONFIG_MACRO_DIR([m4])
@@ -42,51 +45,59 @@ AC_CONFIG_MACRO_DIR([m4])
 # releases, we want to be able run make dist without being required to
 # add a bogus NEWS entry.  In that case, the version string
 # automatically contains a dash, which we also let disable gnits.
-AM_INIT_AUTOMAKE([1.11.1 dist-bzip2]
+AM_INIT_AUTOMAKE([1.11.1 dist-xz silent-rules]
                 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
                           [gnu], [gnits]))
-AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
+AM_SILENT_RULES([yes])
+AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h])

 # Checks for the compiler.
 AC_PROG_CC_STDC
+AC_PROG_CXX

 # Gnulib (early checks).
 gl_EARLY

-AC_ARG_ENABLE(gcc-warnings,
+AC_ARG_ENABLE([gcc-warnings],
 [  --enable-gcc-warnings   turn on lots of GCC warnings (not recommended)],
-[case "${enableval}" in
+[case $enable_gcc_warnings in
   yes|no) ;;
-   *)      AC_MSG_ERROR([bad value ${enableval} for gcc-warnings option]) ;;
+   *)  AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
 esac],
-	      [enableval=no])
-if test "${enableval}" = yes; then
+              [enable_gcc_warnings=no])
+if test "$enable_gcc_warnings" = yes; then
+  warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align
+    -Wcast-qual -Wformat -Wpointer-arith -Wwrite-strings'
+  warn_c='-Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes
+    -Wshadow -Wstrict-prototypes'
+  warn_cxx='-Wnoexcept'
+  AC_LANG_PUSH([C])
+  for i in $warn_common $warn_c;
+  do
+    gl_WARN_ADD([$i], [WARN_CFLAGS])
+  done
  gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
-  AC_SUBST([WERROR_CFLAGS])
-  gl_WARN_ADD([-Wall])
-  gl_WARN_ADD([-Wextra -Wno-sign-compare])
-  gl_WARN_ADD([-Wcast-align])
-  gl_WARN_ADD([-Wcast-qual])
-  gl_WARN_ADD([-Wformat])
-  gl_WARN_ADD([-Wpointer-arith])
-  gl_WARN_ADD([-Wwrite-strings])
-  AC_SUBST([WARN_CXXFLAGS], [$WARN_CFLAGS])
-  # The following warnings are not suitable for C++.
-  gl_WARN_ADD([-Wbad-function-cast])
-  gl_WARN_ADD([-Wmissing-declarations])
-  gl_WARN_ADD([-Wmissing-prototypes])
-  gl_WARN_ADD([-Wshadow])
-  gl_WARN_ADD([-Wstrict-prototypes])
-  AC_SUBST([WARN_CFLAGS])
  # Warnings for the test suite only.
  gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST])
-  WARN_CXXFLAGS_TEST="$WARN_CXXFLAGS $WARN_CFLAGS_TEST"
-  WARN_CFLAGS_TEST="$WARN_CFLAGS $WARN_CFLAGS_TEST"
-  AC_SUBST([WARN_CXXFLAGS_TEST])
-  AC_SUBST([WARN_CFLAGS_TEST])
+  gl_WARN_ADD([-pedantic], [WARN_CFLAGS_TEST])
+  AC_LANG_POP([C])
+
+  AC_LANG_PUSH([C++])
+  for i in $warn_common $warn_cxx;
+  do
+    gl_WARN_ADD([$i], [WARN_CXXFLAGS])
+  done
+  gl_WARN_ADD([ -Wzero-as-null-pointer-constant], [WARN_CXXFLAGS],
+              [AC_LANG_PROGRAM([], [nullptr])])
+  gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS])
+  # Warnings for the test suite only.
+  gl_WARN_ADD([-Wundef], [WARN_CXXFLAGS_TEST])
+  gl_WARN_ADD([-pedantic], [WARN_CXXFLAGS_TEST])
+  AC_LANG_POP([C++])
 fi

 BISON_TEST_FOR_WORKING_C_COMPILER
+BISON_TEST_FOR_WORKING_CXX_COMPILER

 AC_ARG_ENABLE([yacc],
  [AC_HELP_STRING([--disable-yacc],
@@ -105,6 +116,7 @@ AC_SUBST([YACC_LIBRARY])

 # Checks for programs.
 AC_PROG_LEX
+$LEX_IS_FLEX || AC_MSG_ERROR([Flex is required])
 AC_PROG_YACC
 AC_PROG_RANLIB
 AC_PROG_GNU_M4
@@ -128,7 +140,6 @@ gl_INIT
 # Checks for library functions.
 AC_CHECK_FUNCS_ONCE([setlocale])
 AM_WITH_DMALLOC
-BISON_PREREQ_SUBPIPE
 BISON_PREREQ_TIMEVAR

 # Gettext.
@@ -152,13 +163,9 @@ AC_CONFIG_TESTDIR(tests)
 AC_CONFIG_FILES([tests/Makefile tests/atlocal])
 AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
 AC_CHECK_PROGS([VALGRIND], [valgrind])
-AC_PROG_CXX
-BISON_TEST_FOR_WORKING_CXX_COMPILER
 AM_MISSING_PROG([AUTOM4TE], [autom4te])
 # Needed by tests/atlocal.in.
 AC_SUBST([GCC])
-AC_SUBST([O0CFLAGS],   [`echo $CFLAGS   | sed 's/-O[[0-9]] *//'`])
-AC_SUBST([O0CXXFLAGS], [`echo $CXXFLAGS | sed 's/-O[[0-9]] *//'`])

 gt_JAVACOMP([1.3])
 gt_JAVAEXEC
@@ -1,4 +1,4 @@
-## Copyright (C) 2002, 2005-2011 Free Software Foundation, Inc.
+## Copyright (C) 2002, 2005-2012 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
@@ -15,7 +15,7 @@

 dist_pkgdata_DATA = README bison.m4 \
   c-skel.m4 c.m4 yacc.c glr.c \
-   c++-skel.m4 c++.m4 location.cc lalr1.cc glr.cc \
+   c++-skel.m4 c++.m4 location.cc lalr1.cc glr.cc stack.hh \
   java-skel.m4 java.m4 lalr1.java

 m4sugardir = $(pkgdatadir)/m4sugar
@@ -52,7 +52,7 @@ into various formats.

 -----

-Copyright (C) 2002, 2008-2011 Free Software Foundation, Inc.
+Copyright (C) 2002, 2008-2012 Free Software Foundation, Inc.

 This file is part of GNU Bison.

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

 # Language-independent M4 Macros for Bison.

-# Copyright (C) 2002, 2004-2011 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004-2012 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
@@ -85,7 +85,7 @@ m4_if(m4_sysval, [0], [], [m4_fatal([$0: cannot write to stdout])])])
 #
 # For example:
 #
-#   b4_error([[warn]], [[invalid value for `%s': %s]], [[foo]], [[3]])
+#   b4_error([[warn]], [[invalid value for '%s': %s]], [[foo]], [[3]])
 m4_define([b4_error],
 [b4_cat([[@]$1[(]$2[]]dnl
 [m4_if([$#], [2], [],
@@ -114,7 +114,7 @@ m4_define([b4_error_at],
 #
 # For example:
 #
-#   b4_warn([[invalid value for `%s': %s]], [[foo]], [[3]])
+#   b4_warn([[invalid value for '%s': %s]], [[foo]], [[3]])
 #
 # As a simple test suite, this:
 #
@@ -354,7 +354,7 @@ m4_pushdef([b4_start], m4_car(m4_shift(b4_occurrence)))dnl
 m4_pushdef([b4_end], m4_shift(m4_shift(b4_occurrence)))dnl
 m4_ifndef($3[(]m4_quote(b4_user_name)[)],
          [b4_complain_at([b4_start], [b4_end],
-                          [[%s `%s' is not used]],
+                          [[%s '%s' is not used]],
                          [$1], [b4_user_name])])[]dnl
 m4_popdef([b4_occurrence])dnl
 m4_popdef([b4_user_name])dnl
@@ -412,7 +412,7 @@ m4_define([b4_percent_define_get_loc],
          [m4_pushdef([b4_loc], m4_indir([b4_percent_define_loc(]$1[)]))dnl
 b4_loc[]dnl
 m4_popdef([b4_loc])],
-          [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_loc]], [$1])])])
+          [b4_fatal([[b4_percent_define_get_loc: undefined %%define variable '%s']], [$1])])])

 # b4_percent_define_get_syncline(VARIABLE)
 # ----------------------------------------
@@ -429,7 +429,7 @@ m4_popdef([b4_loc])],
 m4_define([b4_percent_define_get_syncline],
 [m4_ifdef([b4_percent_define_syncline(]$1[)],
          [m4_indir([b4_percent_define_syncline(]$1[)])],
-          [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_get_syncline]], [$1])])])
+          [b4_fatal([[b4_percent_define_get_syncline: undefined %%define variable '%s']], [$1])])])

 # b4_percent_define_ifdef(VARIABLE, IF-TRUE, [IF-FALSE])
 # ------------------------------------------------------
@@ -464,10 +464,10 @@ m4_define([b4_percent_define_flag_if],
  [m4_case(b4_percent_define_get([$1]),
           [], [$2], [true], [$2], [false], [$3],
           [m4_expand_once([b4_complain_at(b4_percent_define_get_loc([$1]),
-                                           [[invalid value for %%define Boolean variable `%s']],
+                                           [[invalid value for %%define Boolean variable '%s']],
                                           [$1])],
                           [[b4_percent_define_flag_if($1)]])])],
-  [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_flag_if]], [$1])])])
+  [b4_fatal([[b4_percent_define_flag_if: undefined %%define variable '%s']], [$1])])])

 # b4_percent_define_default(VARIABLE, DEFAULT)
 # --------------------------------------------
@@ -516,15 +516,15 @@ m4_define([_b4_percent_define_check_values],
                            [m4_define([b4_good_value], [1])])])])dnl
   m4_if(b4_good_value, [0],
         [b4_complain_at(b4_percent_define_get_loc([$1]),
-                         [[invalid value for %%define variable `%s': `%s']],
+                         [[invalid value for %%define variable '%s': '%s']],
                         [$1],
                         m4_dquote(m4_indir([b4_percent_define(]$1[)])))
          m4_foreach([b4_value], m4_dquote(m4_shift($@)),
                     [b4_complain_at(b4_percent_define_get_loc([$1]),
-                                     [[accepted value: `%s']],
+                                     [[accepted value: '%s']],
                                     m4_dquote(b4_value))])])dnl
   m4_popdef([b4_good_value])],
-  [b4_fatal([[undefined %%define variable `%s' passed to b4_percent_define_check_values]], [$1])])])
+  [b4_fatal([[b4_percent_define_check_values: undefined %%define variable '%s']], [$1])])])

 # b4_percent_code_get([QUALIFIER])
 # --------------------------------
@@ -2,7 +2,7 @@

 # C++ skeleton dispatching for Bison.

-# Copyright (C) 2006-2007, 2009-2011 Free Software Foundation, Inc.
+# Copyright (C) 2006-2007, 2009-2012 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 @@

 # C++ skeleton for Bison

-# Copyright (C) 2002-2011 Free Software Foundation, Inc.
+# Copyright (C) 2002-2012 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
@@ -97,6 +97,8 @@ m4_map_sep([     b4_token_enum], [,
 ])


+
+
 ## ----------------- ##
 ## Semantic Values.  ##
 ## ----------------- ##
@@ -2,7 +2,7 @@

 # C skeleton dispatching for Bison.

-# Copyright (C) 2006-2007, 2009-2011 Free Software Foundation, Inc.
+# Copyright (C) 2006-2007, 2009-2012 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 @@

 # C M4 Macros for Bison.

-# Copyright (C) 2002, 2004-2011 Free Software Foundation, Inc.
+# Copyright (C) 2002, 2004-2012 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
@@ -17,6 +17,33 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.

+
+# b4_tocpp(STRING)
+# ----------------
+# Convert STRING into a valid C macro name.
+m4_define([b4_tocpp],
+[m4_toupper(m4_bpatsubst(m4_quote($1), [[^a-zA-Z0-9]+], [_]))])
+
+
+# b4_cpp_guard(FILE)
+# ------------------
+# A valid C macro name to use as a CPP header guard for FILE.
+m4_define([b4_cpp_guard],
+[b4_tocpp(m4_defn([b4_prefix])/[$1])])
+
+
+# b4_cpp_guard_open(FILE)
+# b4_cpp_guard_close(FILE)
+# ------------------------
+# Open/close CPP inclusion guards for FILE.
+m4_define([b4_cpp_guard_open],
+[#ifndef b4_cpp_guard([$1])
+# define b4_cpp_guard([$1])])
+
+m4_define([b4_cpp_guard_close],
+[#endif b4_comment([!b4_cpp_guard([$1])])])
+
+
 ## ---------------- ##
 ## Identification.  ##
 ## ---------------- ##
@@ -146,16 +173,31 @@ m4_define([b4_table_value_equals],
       [[YYID (0)]],
       [[((]$2[) == (]$3[))]])])

+
 ## ---------##
 ## Values.  ##
 ## ---------##

-# b4_null
---------
-# Return a null pointer constant.  NULL infringes on the user name
-# space in C, so use 0 rather than NULL.
-m4_define([b4_null], [0])

+# b4_null_define
+# --------------
+# Portability issues: define a YY_NULL appropriate for the current
+# language (C, C++98, or C++11).
+m4_define([b4_null_define],
+[# ifndef YY_NULL
+#  if defined __cplusplus && 201103L <= __cplusplus
+#   define YY_NULL nullptr
+#  else
+#   define YY_NULL 0
+#  endif
+# endif[]dnl
+])
+
+
+# b4_null
+# -------
+# Return a null pointer constant.
+m4_define([b4_null], [YY_NULL])



@@ -441,6 +483,8 @@ m4_define_default([b4_yy_symbol_print_generate],
 b4_locations_if([, [[YYLTYPE const * const yylocationp], [yylocationp]]])[]dnl
 m4_ifset([b4_parse_param], [, b4_parse_param]))[
 {
+  FILE *yyo = yyoutput;
+  YYUSE (yyo);
  if (!yyvaluep)
    return;
 ]b4_locations_if([  YYUSE (yylocationp);
@@ -2,7 +2,7 @@

 # C++ GLR skeleton for Bison

-# Copyright (C) 2002-2011 Free Software Foundation, Inc.
+# Copyright (C) 2002-2012 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
@@ -79,9 +79,9 @@ m4_define([b4_yy_symbol_print_generate],
    [[FILE *],               []],
    [[int yytype],           [yytype]],
    [[const b4_namespace_ref::b4_parser_class_name::semantic_type *yyvaluep],
-			     [yyvaluep]],
+                             [yyvaluep]],
    [[const b4_namespace_ref::b4_parser_class_name::location_type *yylocationp],
-			     [yylocationp]],
+                             [yylocationp]],
    b4_parse_param)[
 {
 ]b4_parse_param_use[]dnl
@@ -96,7 +96,8 @@ m4_append([b4_post_prologue],

 b4_c_ansi_function_decl([yyerror],
    [static void],
-    [[b4_namespace_ref::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
+    [[const b4_namespace_ref::b4_parser_class_name::location_type *yylocationp],
+                        [yylocationp]],
    b4_parse_param,
    [[const char* msg], [msg]])])

@@ -110,7 +111,8 @@ m4_append([b4_epilogue],

 ]b4_c_ansi_function_def([yyerror],
    [static void],
-    [[b4_namespace_ref::b4_parser_class_name::location_type *yylocationp], [yylocationp]],
+    [[const b4_namespace_ref::b4_parser_class_name::location_type *yylocationp],
+                        [yylocationp]],
    b4_parse_param,
    [[const char* msg], [msg]])[
 {
@@ -149,27 +151,31 @@ m4_pushdef([b4_parse_param], m4_defn([b4_parse_param_orig]))dnl

  inline void
  ]b4_parser_class_name[::yy_symbol_value_print_ (int yytype,
-			   const semantic_type* yyvaluep, const location_type* yylocationp)
+                           const semantic_type* yyvaluep,
+                           const location_type* yylocationp)
  {
-    /* Pacify ``unused variable'' warnings.  */
-    YYUSE (yyvaluep);
    YYUSE (yylocationp);
+    YYUSE (yyvaluep);
+    std::ostream& yyoutput = debug_stream ();
+    std::ostream& yyo = yyoutput;
+    YYUSE (yyo);
    switch (yytype)
      {
  ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
 [        default:
-	  break;
+          break;
      }
  }


  void
  ]b4_parser_class_name[::yy_symbol_print_ (int yytype,
-			   const semantic_type* yyvaluep, const location_type* yylocationp)
+                           const semantic_type* yyvaluep,
+                           const location_type* yylocationp)
  {
    *yycdebug_ << (yytype < YYNTOKENS ? "token" : "nterm")
-	       << ' ' << yytname[yytype] << " ("
-	       << *yylocationp << ": ";
+               << ' ' << yytname[yytype] << " ("
+               << *yylocationp << ": ";
    yy_symbol_value_print_ (yytype, yyvaluep, yylocationp);
    *yycdebug_ << ')';
  }
@@ -209,10 +215,10 @@ b4_namespace_close[
 # Let glr.c believe that the user arguments include the parser itself.
 m4_ifset([b4_parse_param],
 [m4_pushdef([b4_parse_param],
-	    m4_dquote([[[b4_namespace_ref::b4_parser_class_name& yyparser], [[yyparser]]],]
+            m4_dquote([[[b4_namespace_ref::b4_parser_class_name& yyparser], [[yyparser]]],]
 m4_defn([b4_parse_param])))],
 [m4_pushdef([b4_parse_param],
-	    [[[[b4_namespace_ref::b4_parser_class_name& yyparser], [[yyparser]]]]])
+            [[[[b4_namespace_ref::b4_parser_class_name& yyparser], [[yyparser]]]]])
 ])
 m4_include(b4_pkgdatadir/[glr.c])
 m4_popdef([b4_parse_param])
@@ -220,7 +226,7 @@ m4_popdef([b4_parse_param])
 m4_divert_push(0)
@output(b4_spec_defines_file@)@
 b4_copyright([Skeleton interface for Bison GLR parsers in C++],
-             [2002-2006, 2009-2011])[
+             [2002-2006, 2009-2012])[

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

@@ -247,17 +253,17 @@ b4_copyright([Skeleton interface for Bison GLR parsers in C++],
   the previous symbol: RHS[0] (always defined).  */

 #ifndef YYLLOC_DEFAULT
-# define YYLLOC_DEFAULT(Current, Rhs, N)				\
-    do									\
-      if (N)								\
-	{								\
-	  (Current).begin  = YYRHSLOC (Rhs, 1).begin;			\
-	  (Current).end    = YYRHSLOC (Rhs, N).end;			\
-	}								\
-      else								\
-	{								\
-	  (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;	\
-	}								\
+# define YYLLOC_DEFAULT(Current, Rhs, N)                                \
+    do                                                                  \
+      if (N)                                                            \
+        {                                                               \
+          (Current).begin  = YYRHSLOC (Rhs, 1).begin;                   \
+          (Current).end    = YYRHSLOC (Rhs, N).end;                     \
+        }                                                               \
+      else                                                              \
+        {                                                               \
+          (Current).begin = (Current).end = YYRHSLOC (Rhs, 0).end;      \
+        }                                                               \
    while (/*CONSTCOND*/ 0)
 #endif

@@ -326,32 +332,21 @@ b4_user_stype
    /// \param yyvaluep     Its semantic value.
    /// \param yylocationp  Its location.
    virtual void yy_symbol_value_print_ (int yytype,
-					 const semantic_type* yyvaluep,
-					 const location_type* yylocationp);
+                                         const semantic_type* yyvaluep,
+                                         const location_type* yylocationp);
    /// \brief Report a symbol on the debug stream.
    /// \param yytype       The token type.
    /// \param yyvaluep     Its semantic value.
    /// \param yylocationp  Its location.
    virtual void yy_symbol_print_ (int yytype,
-				   const semantic_type* yyvaluep,
-				   const location_type* yylocationp);
+                                   const semantic_type* yyvaluep,
+                                   const location_type* yylocationp);
  private:
    /* Debugging.  */
    int yydebug_;
    std::ostream* yycdebug_;
 #endif

-
-    /// \brief Reclaim the memory associated to a symbol.
-    /// \param yymsg        Why this token is reclaimed.
-    /// \param yytype       The symbol type.
-    /// \param yyvaluep     Its semantic value.
-    /// \param yylocationp  Its location.
-    inline void yydestruct_ (const char* yymsg,
-			     int yytype,
-			     semantic_type* yyvaluep,
-			     location_type* yylocationp);
-
 ]b4_parse_param_vars[
  };

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

 # Java skeleton dispatching for Bison.

-# Copyright (C) 2007, 2009-2011 Free Software Foundation, Inc.
+# Copyright (C) 2007, 2009-2012 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) 2007-2011 Free Software Foundation, Inc.
+# Copyright (C) 2007-2012 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 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2011 Free Software Foundation, Inc.
+# Copyright (C) 2002-2012 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
@@ -28,6 +28,7 @@ b4_percent_define_ifdef([[location_type]], [],
  [# Backward compatibility.
  m4_define([b4_location_constructors])
  m4_include(b4_pkgdatadir/[location.cc])])
+m4_include(b4_pkgdatadir/[stack.hh])

 # We do want M4 expansion after # for CPP macros.
 m4_changecom()
@@ -35,13 +36,16 @@ m4_divert_push(0)dnl
 b4_defines_if(
 [@output(b4_spec_defines_file@)@
 b4_copyright([Skeleton interface for Bison LALR(1) parsers in C++],
-             [2002-2011])
-dnl FIXME: This is wrong, we want computed header guards.
+             [2002-2012])
 [
+/**
+ ** \file ]b4_spec_defines_file[
+ ** Define the ]b4_namespace_ref[::parser class.
+ */
+
 /* C++ LALR(1) parser skeleton written by Akim Demaille.  */

-#ifndef PARSER_HEADER_H
-# define PARSER_HEADER_H
+]b4_cpp_guard_open([b4_spec_defines_file])[

 ]b4_percent_code_get([[requires]])[

@@ -51,6 +55,8 @@ dnl FIXME: This is wrong, we want computed header guards.
 ]b4_percent_define_ifdef([[location_type]], [],
                         [[#include "location.hh"]])[

+]b4_null_define[
+
 /* Enabling traces.  */
 #ifndef YYDEBUG
 # define YYDEBUG ]b4_debug_flag[
@@ -275,14 +281,13 @@ b4_user_stype
 /* Redirection for backward compatibility.  */
 # define YYSTYPE b4_namespace_ref::b4_parser_class_name::semantic_type
 #endif
-])
-b4_percent_code_get([[provides]])[]dnl
-
-[#endif /* ! defined PARSER_HEADER_H */]
+])[
+]b4_percent_code_get([[provides]])[
+]b4_cpp_guard_close([b4_spec_defines_file])
 ])dnl
@output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in C++],
-             [2002-2011])
+             [2002-2012])
 b4_percent_code_get([[top]])[]dnl
 m4_if(b4_prefix, [yy], [],
 [
@@ -444,6 +449,9 @@ do {					\
  {
    YYUSE (yylocationp);
    YYUSE (yyvaluep);
+    std::ostream& yyo = debug_stream ();
+    std::ostream& yyoutput = yyo;
+    YYUSE (yyoutput);
    switch (yytype)
      {
  ]m4_map([b4_symbol_actions], m4_defn([b4_symbol_printers]))dnl
@@ -931,7 +939,7 @@ b4_error_verbose_if([int yystate, int yytoken],
          }
      }

-    char const* yyformat = 0;
+    char const* yyformat = YY_NULL;
    switch (yycount)
      {
 #define YYCASE_(N, S)                         \
@@ -1134,106 +1142,5 @@ b4_error_verbose_if([int yystate, int yytoken],
  const ]b4_parser_class_name[::token_number_type ]b4_parser_class_name[::yyundef_token_ = ]b4_undef_token_number[;

 ]b4_namespace_close[
-
 ]b4_epilogue
-dnl
-@output(b4_dir_prefix[]stack.hh@)@
-b4_copyright([Stack handling for Bison parsers in C++],
-             [2002-2011])[
-
-#ifndef BISON_STACK_HH
-# define BISON_STACK_HH
-
-#include <deque>
-
-]b4_namespace_open[
-  template <class T, class S = std::deque<T> >
-  class stack
-  {
-  public:
-
-    // Hide our reversed order.
-    typedef typename S::reverse_iterator iterator;
-    typedef typename S::const_reverse_iterator const_iterator;
-
-    stack () : seq_ ()
-    {
-    }
-
-    stack (unsigned int n) : seq_ (n)
-    {
-    }
-
-    inline
-    T&
-    operator [] (unsigned int i)
-    {
-      return seq_[i];
-    }
-
-    inline
-    const T&
-    operator [] (unsigned int i) const
-    {
-      return seq_[i];
-    }
-
-    inline
-    void
-    push (const T& t)
-    {
-      seq_.push_front (t);
-    }
-
-    inline
-    void
-    pop (unsigned int n = 1)
-    {
-      for (; n; --n)
-	seq_.pop_front ();
-    }
-
-    inline
-    unsigned int
-    height () const
-    {
-      return seq_.size ();
-    }
-
-    inline const_iterator begin () const { return seq_.rbegin (); }
-    inline const_iterator end () const { return seq_.rend (); }
-
-  private:
-
-    S seq_;
-  };
-
-  /// Present a slice of the top of a stack.
-  template <class T, class S = stack<T> >
-  class slice
-  {
-  public:
-
-    slice (const S& stack,
-	   unsigned int range) : stack_ (stack),
-				 range_ (range)
-    {
-    }
-
-    inline
-    const T&
-    operator [] (unsigned int i) const
-    {
-      return stack_[range_ - i];
-    }
-
-  private:
-
-    const S& stack_;
-    unsigned int range_;
-  };
-]b4_namespace_close[
-
-#endif // not BISON_STACK_HH[]dnl
-]
 m4_divert_pop(0)
@@ -1,6 +1,6 @@
 # Java skeleton for Bison -*- autoconf -*-

-# Copyright (C) 2007-2011 Free Software Foundation, Inc.
+# Copyright (C) 2007-2012 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
@@ -25,7 +25,7 @@ m4_ifval(m4_defn([b4_symbol_destructors]),
 m4_divert_push(0)dnl
@output(b4_parser_file_name@)@
 b4_copyright([Skeleton implementation for Bison LALR(1) parsers in Java],
-             [2007-2011])
+             [2007-2012])

 b4_percent_define_ifdef([package], [package b4_percent_define_get([package]);
 ])[/* First part of user declarations.  */
@@ -454,8 +454,6 @@ b4_lexer_if([[
    /// Semantic value of the lookahead.
    b4_yystype[ yylval = null;

-    int yyresult;
-
    yycdebug ("Starting parse\n");
    yyerrstatus_ = 0;

@@ -644,7 +642,7 @@ m4_popdef([b4_at_dollar])])dnl
 	      }

 	    /* Pop the current state because it cannot handle the error token.  */
-	    if (yystack.height == 1)
+	    if (yystack.height == 0)
 	      return false;

 	    ]b4_locations_if([yyerrloc = yystack.locationAt (0);])[
@@ -1,6 +1,6 @@
 # C++ skeleton for Bison

-# Copyright (C) 2002-2007, 2009-2011 Free Software Foundation, Inc.
+# Copyright (C) 2002-2007, 2009-2012 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
@@ -20,59 +20,64 @@ m4_changecom()
 m4_divert_push(0)dnl
@output(b4_dir_prefix[]position.hh@)@
 b4_copyright([Positions for Bison parsers in C++],
-             [2002-2007, 2009-2011])[
+             [2002-2007, 2009-2012])[

 /**
- ** \file position.hh
+ ** \file ]b4_dir_prefix[position.hh
 ** Define the ]b4_namespace_ref[::position class.
 */

-#ifndef BISON_POSITION_HH
-# define BISON_POSITION_HH
+]b4_cpp_guard_open([b4_dir_prefix[]position.hh])[

 # include <iostream>
 # include <string>
 # include <algorithm>

+]b4_null_define[
+
 ]b4_namespace_open[
  /// Abstract a position.
  class position
  {
  public:
-]m4_ifdef([b4_location_constructors], [
+]m4_ifdef([b4_location_constructors], [[
    /// Construct a position.
-    position ()
-      : filename (0), line (]b4_location_initial_line[), column (]b4_location_initial_column[)
+    explicit position (]b4_percent_define_get([[filename_type]])[* f = YY_NULL,
+                       unsigned int l = ]b4_location_initial_line[u,
+                       unsigned int c = ]b4_location_initial_column[u)
+      : filename (f)
+      , line (l)
+      , column (c)
    {
    }

-])[
+]])[
    /// Initialization.
-    inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
+    void initialize (]b4_percent_define_get([[filename_type]])[* fn = YY_NULL,
+                     unsigned int l = ]b4_location_initial_line[u,
+                     unsigned int c = ]b4_location_initial_column[u)
    {
      filename = fn;
-      line = ]b4_location_initial_line[;
-      column = ]b4_location_initial_column[;
+      line = l;
+      column = c;
    }

    /** \name Line and Column related manipulators
     ** \{ */
-  public:
    /// (line related) Advance to the COUNT next lines.
-    inline void lines (int count = 1)
+    void lines (int count = 1)
    {
-      column = ]b4_location_initial_column[;
+      column = ]b4_location_initial_column[u;
      line += count;
    }

    /// (column related) Advance to the COUNT next columns.
-    inline void columns (int count = 1)
+    void columns (int count = 1)
    {
      column = std::max (]b4_location_initial_column[u, column + count);
    }
    /** \} */

-  public:
    /// File name to which this position refers.
    ]b4_percent_define_get([[filename_type]])[* filename;
    /// Current line number.
@@ -142,18 +147,17 @@ b4_copyright([Positions for Bison parsers in C++],
  }

 ]b4_namespace_close[
-#endif // not BISON_POSITION_HH]
+]b4_cpp_guard_close([b4_dir_prefix[]position.hh])
@output(b4_dir_prefix[]location.hh@)@
 b4_copyright([Locations for Bison parsers in C++],
-             [2002-2007, 2009-2011])[
+             [2002-2007, 2009-2012])[

 /**
- ** \file location.hh
+ ** \file ]b4_dir_prefix[location.hh
 ** Define the ]b4_namespace_ref[::location class.
 */

-#ifndef BISON_LOCATION_HH
-# define BISON_LOCATION_HH
+]b4_cpp_guard_open([b4_dir_prefix[]location.hh])[

 # include <iostream>
 # include <string>
@@ -166,17 +170,36 @@ b4_copyright([Locations for Bison parsers in C++],
  {
  public:
 ]m4_ifdef([b4_location_constructors], [
-    /// Construct a location.
-    location ()
-      : begin (), end ()
+    /// Construct a location from \a b to \a e.
+    location (const position& b, const position& e)
+      : begin (b)
+      , end (e)
+    {
+    }
+
+    /// Construct a 0-width location in \a p.
+    explicit location (const position& p = position ())
+      : begin (p)
+      , end (p)
+    {
+    }
+
+    /// Construct a 0-width location in \a f, \a l, \a c.
+    explicit location (]b4_percent_define_get([[filename_type]])[* f,
+                       unsigned int l = ]b4_location_initial_line[u,
+                       unsigned int c = ]b4_location_initial_column[u)
+      : begin (f, l, c)
+      , end (f, l, c)
    {
    }

 ])[
    /// Initialization.
-    inline void initialize (]b4_percent_define_get([[filename_type]])[* fn)
+    void initialize (]b4_percent_define_get([[filename_type]])[* f = YY_NULL,
+                     unsigned int l = ]b4_location_initial_line[u,
+                     unsigned int c = ]b4_location_initial_column[u)
    {
-      begin.initialize (fn);
+      begin.initialize (f, l, c);
      end = begin;
    }

@@ -184,19 +207,19 @@ b4_copyright([Locations for Bison parsers in C++],
     ** \{ */
  public:
    /// Reset initial location to final location.
-    inline void step ()
+    void step ()
    {
      begin = end;
    }

    /// Extend the current location to the COUNT next columns.
-    inline void columns (unsigned int count = 1)
+    void columns (unsigned int count = 1)
    {
      end += count;
    }

    /// Extend the current location to the COUNT next lines.
-    inline void lines (unsigned int count = 1)
+    void lines (unsigned int count = 1)
    {
      end.lines (count);
    }
@@ -270,6 +293,6 @@ b4_copyright([Locations for Bison parsers in C++],

 ]b4_namespace_close[

-#endif // not BISON_LOCATION_HH]
+]b4_cpp_guard_close([b4_dir_prefix[]location.hh])
 m4_divert_pop(0)
 m4_changecom([#])
@@ -0,0 +1,124 @@
+# C++ skeleton for Bison
+
+# Copyright (C) 2002-2012 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_pushdef([b4_copyright_years],
+           [2002-2012])
+
+# We do want M4 expansion after # for CPP macros.
+m4_changecom()
+m4_divert_push(0)dnl
+@output(b4_dir_prefix[]stack.hh@)@
+b4_copyright([Stack handling for Bison parsers in C++],
+             [2002-2012])[
+
+/**
+ ** \file ]b4_dir_prefix[stack.hh
+ ** Define the ]b4_namespace_ref[::stack class.
+ */
+
+]b4_cpp_guard_open([b4_dir_prefix[]stack.hh])[
+
+# include <deque>
+
+]b4_namespace_open[
+  template <class T, class S = std::deque<T> >
+  class stack
+  {
+  public:
+    // Hide our reversed order.
+    typedef typename S::reverse_iterator iterator;
+    typedef typename S::const_reverse_iterator const_iterator;
+
+    stack () : seq_ ()
+    {
+    }
+
+    stack (unsigned int n) : seq_ (n)
+    {
+    }
+
+    inline
+    T&
+    operator [] (unsigned int i)
+    {
+      return seq_[i];
+    }
+
+    inline
+    const T&
+    operator [] (unsigned int i) const
+    {
+      return seq_[i];
+    }
+
+    inline
+    void
+    push (const T& t)
+    {
+      seq_.push_front (t);
+    }
+
+    inline
+    void
+    pop (unsigned int n = 1)
+    {
+      for (; n; --n)
+        seq_.pop_front ();
+    }
+
+    inline
+    unsigned int
+    height () const
+    {
+      return seq_.size ();
+    }
+
+    inline const_iterator begin () const { return seq_.rbegin (); }
+    inline const_iterator end () const { return seq_.rend (); }
+
+  private:
+    S seq_;
+  };
+
+  /// Present a slice of the top of a stack.
+  template <class T, class S = stack<T> >
+  class slice
+  {
+  public:
+    slice (const S& stack, unsigned int range)
+      : stack_ (stack)
+      , range_ (range)
+    {
+    }
+
+    inline
+    const T&
+    operator [] (unsigned int i) const
+    {
+      return stack_[range_ - i];
+    }
+
+  private:
+    const S& stack_;
+    unsigned int range_;
+  };
+]b4_namespace_close[
+
+]b4_cpp_guard_close([b4_dir_prefix[]stack.hh])
+m4_divert_pop(0)
+m4_popdef([b4_copyright_years])dnl
+m4_changecom([#])
@@ -3,7 +3,7 @@
 <!--
    bison.xsl - common templates for Bison XSLT.

-    Copyright (C) 2007-2011 Free Software Foundation, Inc.
+    Copyright (C) 2007-2012 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) 2007-2011 Free Software Foundation, Inc.
+    Copyright (C) 2007-2012 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) 2007-2011 Free Software Foundation, Inc.
+    Copyright (C) 2007-2012 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) 2007-2011 Free Software Foundation, Inc.
+    Copyright (C) 2007-2012 Free Software Foundation, Inc.

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

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

 # Yacc compatible skeleton for Bison

-# Copyright (C) 1984, 1989-1990, 2000-2011 Free Software Foundation,
+# Copyright (C) 1984, 1989-1990, 2000-2012 Free Software Foundation,
 # Inc.

 # This program is free software: you can redistribute it and/or modify
@@ -197,7 +197,7 @@ m4_define([b4_declare_parser_state_variables], [b4_pure_if([[
       `yyvs': related to semantic values.]b4_locations_if([[
       `yyls': related to locations.]])[

-       Refer to the stacks thru separate pointers, to allow yyoverflow
+       Refer to the stacks through separate pointers, to allow yyoverflow
       to reallocate them elsewhere.  */

    /* The state stack.  */
@@ -234,7 +234,7 @@ m4_changecom()
 m4_divert_push(0)dnl
@output(b4_parser_file_name@)@
 b4_copyright([Bison implementation for Yacc-like parsers in C],
-             [1984, 1989-1990, 2000-2011])[
+             [1984, 1989-1990, 2000-2012])[

 /* C LALR(1) parser skeleton written by Richard Stallman, by
   simplifying the original so-called "semantic" parser.  */
@@ -267,6 +267,8 @@ m4_if(b4_prefix, [yy], [],
 /* Copy the first part of user declarations.  */
 ]b4_user_pre_prologue[

+]b4_null_define[
+
 /* Enabling traces.  */
 #ifndef YYDEBUG
 # define YYDEBUG ]b4_debug_flag[
@@ -437,6 +439,7 @@ b4_push_if([], [b4_lac_if([], [[
 #    define YYSTACK_ALLOC alloca
 #    if ! defined _ALLOCA_H && ! defined EXIT_SUCCESS && ]b4_c_modern[
 #     include <stdlib.h> /* INFRINGES ON USER NAME SPACE */
+      /* Use EXIT_SUCCESS as a witness for stdlib.h.  */
 #     ifndef EXIT_SUCCESS
 #      define EXIT_SUCCESS 0
 #     endif
@@ -533,20 +536,20 @@ union yyalloc
 #endif

 #if defined YYCOPY_NEEDED && YYCOPY_NEEDED
-/* Copy COUNT objects from FROM to TO.  The source and destination do
+/* Copy COUNT objects from SRC to DST.  The source and destination do
   not overlap.  */
 # ifndef YYCOPY
 #  if defined __GNUC__ && 1 < __GNUC__
-#   define YYCOPY(To, From, Count) \
-      __builtin_memcpy (To, From, (Count) * sizeof (*(From)))
+#   define YYCOPY(Dst, Src, Count) \
+      __builtin_memcpy (Dst, Src, (Count) * sizeof (*(Src)))
 #  else
-#   define YYCOPY(To, From, Count)		\
-      do					\
-	{					\
-	  YYSIZE_T yyi;				\
-	  for (yyi = 0; yyi < (Count); yyi++)	\
-	    (To)[yyi] = (From)[yyi];		\
-	}					\
+#   define YYCOPY(Dst, Src, Count)              \
+      do                                        \
+        {                                       \
+          YYSIZE_T yyi;                         \
+          for (yyi = 0; yyi < (Count); yyi++)   \
+            (Dst)[yyi] = (Src)[yyi];            \
+        }                                       \
      while (YYID (0))
 #  endif
 # endif
@@ -712,18 +715,19 @@ static const ]b4_int_type_for([b4_stos])[ yystos[] =

 #define YYRECOVERING()  (!!yyerrstatus)

-#define YYBACKUP(Token, Value)					\
-do								\
-  if (yychar == YYEMPTY && yylen == 1)				\
-    {								\
-      yychar = (Token);						\
-      yylval = (Value);						\
-      YYPOPSTACK (1);						\]b4_lac_if([[
-      YY_LAC_DISCARD ("YYBACKUP");				\]])[
-      goto yybackup;						\
-    }								\
-  else								\
-    {								\
+#define YYBACKUP(Token, Value)                                  \
+do                                                              \
+  if (yychar == YYEMPTY)                                        \
+    {                                                           \
+      yychar = (Token);                                         \
+      yylval = (Value);                                         \
+      YYPOPSTACK (yylen);                                       \
+      yystate = *yyssp;                                         \]b4_lac_if([[
+      YY_LAC_DISCARD ("YYBACKUP");                              \]])[
+      goto yybackup;                                            \
+    }                                                           \
+  else                                                          \
+    {                                                           \
      yyerror (]b4_yyerror_args[YY_("syntax error: cannot back up")); \
      YYERROR;							\
    }								\
@@ -1241,12 +1245,12 @@ yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
                ]b4_lac_if([[yytype_int16 *yyesa, yytype_int16 **yyes,
                YYSIZE_T *yyes_capacity, ]])[yytype_int16 *yyssp, int yytoken)
 {
-  YYSIZE_T yysize0 = yytnamerr (0, yytname[yytoken]);
+  YYSIZE_T yysize0 = yytnamerr (YY_NULL, yytname[yytoken]);
  YYSIZE_T yysize = yysize0;
  YYSIZE_T yysize1;
  enum { YYERROR_VERBOSE_ARGS_MAXIMUM = 5 };
  /* Internationalized format string. */
-  const char *yyformat = 0;
+  const char *yyformat = YY_NULL;
  /* Arguments of yyformat. */
  char const *yyarg[YYERROR_VERBOSE_ARGS_MAXIMUM];
  /* Number of reported tokens (one for the "unexpected", one per
@@ -1324,7 +1328,7 @@ yysyntax_error (YYSIZE_T *yymsg_alloc, char **yymsg,
                    break;
                  }
                yyarg[yycount++] = yytname[yyx];
-                yysize1 = yysize + yytnamerr (0, yytname[yyx]);
+                yysize1 = yysize + yytnamerr (YY_NULL, yytname[yyx]);
                if (! (yysize <= yysize1
                       && yysize1 <= YYSTACK_ALLOC_MAXIMUM))
                  return 2;
@@ -1413,7 +1417,7 @@ static char yypstate_allocated = 0;]])b4_pull_if([

 b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
 {
-  return yypull_parse (0]m4_ifset([b4_parse_param],
+  return yypull_parse (YY_NULL]m4_ifset([b4_parse_param],
                                  [[, ]b4_c_args(b4_parse_param)])[);
 }

@@ -1426,7 +1430,9 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
  int yychar;
  YYSTYPE yylval;]b4_locations_if([[
  YYLTYPE yylloc;]])])[
-  if (yyps == 0)
+  if (yyps)
+    yyps_local = yyps;
+  else
    {
      yyps_local = yypstate_new ();
      if (!yyps_local)
@@ -1437,14 +1443,12 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
          return 2;
        }
    }
-  else
-    yyps_local = yyps;
  do {
    yychar = YYLEX;
    yystatus =
      yypush_parse (yyps_local]b4_pure_if([[, yychar, &yylval]b4_locations_if([[, &yylloc]])])m4_ifset([b4_parse_param], [, b4_c_args(b4_parse_param)])[);
  } while (yystatus == YYPUSH_MORE);
-  if (yyps == 0)
+  if (!yyps)
    yypstate_delete (yyps_local);
  return yystatus;
 }]])[
@@ -1454,10 +1458,10 @@ b4_c_function_def([[yyparse]], [[int]], b4_parse_param)[
 {
  yypstate *yyps;]b4_pure_if([], [[
  if (yypstate_allocated)
-    return 0;]])[
+    return YY_NULL;]])[
  yyps = (yypstate *) malloc (sizeof *yyps);
  if (!yyps)
-    return 0;
+    return YY_NULL;
  yyps->yynew = 1;]b4_pure_if([], [[
  yypstate_allocated = 1;]])[
  return yyps;
@@ -2017,7 +2021,7 @@ yyabortlab:
  yyresult = 1;
  goto yyreturn;

-#if ]b4_lac_if([[1]], [[!defined(yyoverflow) || YYERROR_VERBOSE]])[
+#if ]b4_lac_if([[1]], [[!defined yyoverflow || YYERROR_VERBOSE]])[
 /*-------------------------------------------------.
 | yyexhaustedlab -- memory exhaustion comes here.  |
 `-------------------------------------------------*/
@@ -2068,7 +2072,7 @@ yypushreturn:]])[
 b4_defines_if(
 [@output(b4_spec_defines_file@)@
 b4_copyright([Bison interface for Yacc-like parsers in C],
-             [1984, 1989-1990, 2000-2011])
+             [1984, 1989-1990, 2000-2012])

 b4_percent_code_get([[requires]])[]dnl

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

-## Copyright (C) 2005-2011 Free Software Foundation, Inc.
+## Copyright (C) 2005-2012 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) 2005-2011 Free Software Foundation, Inc.
+Copyright (C) 2005-2012 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
@@ -84,7 +84,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.
 	some more work to unpack, if LFN support is not available.  If LFN is
 	available then you can extract the source files from the archive with
 	any unzip program and proceed to the paragraph 3.3, below.  Any file
-	name issue will be handled by the the DJGPP configuration files.
+	name issue will be handled by the DJGPP configuration files.
 	To unpack the source distribution on SFN systems, first, you MUST use
 	the `djunpack' batch file to unzip the package.  That is because some
 	file names in the official distributions need to be changed to avoid
@@ -179,7 +179,7 @@ along with this program.  If not, see <http://www.gnu.org/licenses/>.

 	This will install the products into your DJGPP installation tree given
 	by the default prefix "/dev/env/DJDIR".  If you prefer to install them
-	into some other directory you will have to set prefix to the appropiate
+	into some other directory you will have to set prefix to the appropriate
 	value:
 	  make install prefix=z:/some/other/place

@@ -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) 2005-2011 Free Software Foundation, Inc.
+Rem Copyright (C) 2005-2012 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
@@ -471,7 +471,7 @@ redir -e /dev/null rm %XSRC%/po/stamp-cat-id

 Rem Update the arguments file for the configure script.
 Rem We prefer without-included-gettext because libintl.a from gettext package
-Rem is the only one that is garanteed to have been ported to DJGPP.
+Rem is the only one that is guaranteed to have been ported to DJGPP.
 echo --enable-nls --without-included-gettext >> args
 goto ConfigurePackage

@@ -2,7 +2,7 @@
 # Sed script for additional DJGPP specific editing
 # of the configure script generated by autoconf 2.62.

-# Copyright (C) 2005-2011 Free Software Foundation, Inc.
+# Copyright (C) 2005-2012 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) 2005-2011 Free Software Foundation, Inc.
+# Copyright (C) 2005-2012 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) 2005-2011 Free Software Foundation, Inc.
+# Copyright (C) 2005-2012 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) 2005-2011 Free Software Foundation, Inc.
+Rem Copyright (C) 2005-2012 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) 2005-2011 Free Software Foundation, Inc.
+   Copyright (C) 2005-2012 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
@@ -60,7 +60,7 @@ static char tmp_file_name[2][L_tmpnam];
  do {                                                                \
    close ((fd));                                                     \
    if (unlink ((name)))                                              \
-      error (EXIT_FAILURE, 0, _("removing of `%s' failed"), (name));  \
+      error (EXIT_FAILURE, 0, _("removing of '%s' failed"), (name));  \
  } while (0)


@@ -231,17 +231,17 @@ end_of_output_subpipe(pid_t pid, int fd[2])
  {
    remove_tmp_file(STDIN_FILENO, tmp_file_name[0]);
    remove_tmp_file(STDOUT_FILENO, tmp_file_name[1]);
-    error(EXIT_FAILURE, 0, _("subsidiary program `%s' interrupted"), program);
+    error(EXIT_FAILURE, 0, _("subsidiary program '%s' interrupted"), program);
  }
  if (status)
  {
    remove_tmp_file(STDIN_FILENO, tmp_file_name[0]);
    remove_tmp_file(STDOUT_FILENO, tmp_file_name[1]);
    error(EXIT_FAILURE, 0, _(errno == ENOENT
-			     ? "subsidiary program `%s' not found"
+			     ? "subsidiary program '%s' not found"
 			     : status < 1
-			     ? "subsidiary program `%s' failed"
-			     : "subsidiary program `%s' failed (status=%i, errno=%i)"), program, status, errno);
+			     ? "subsidiary program '%s' failed"
+			     : "subsidiary program '%s' failed (status=%i, errno=%i)"), program, status, errno);
  }


@@ -283,9 +283,9 @@ reap_subpipe(pid_t pid, char const *program)
  free(arguments);

  if (unlink(tmp_file_name[0]))
-    error(EXIT_FAILURE, 0, _("removing of `%s' failed"), tmp_file_name[0]);
+    error(EXIT_FAILURE, 0, _("removing of '%s' failed"), tmp_file_name[0]);
  if (unlink(tmp_file_name[1]))
-    error(EXIT_FAILURE, 0, _("removing of `%s' failed"), tmp_file_name[1]);
+    error(EXIT_FAILURE, 0, _("removing of '%s' failed"), tmp_file_name[1]);

  if (dup2(old_stdin, STDIN_FILENO) < 0)
    error(EXIT_FAILURE, 0, "restore of bison's stdin failed");
@@ -1,6 +1,6 @@
 /* Subprocesses with pipes.

-   Copyright (C) 2005-2011 Free Software Foundation, Inc.
+   Copyright (C) 2005-2012 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 @@
 # Sed script for additional DJGPP specific editing
 # of the testsuite script generated by autoconf 2.61.

-# Copyright (C) 2007-2011 Free Software Foundation, Inc.
+# Copyright (C) 2007-2012 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 +1,3 @@
-
 /*.info*
 /*~
 /.dirstamp
@@ -20,11 +19,12 @@
 /bison.tp
 /bison.vr
 /cross-options.texi
+/fdl.texi
 /gendocs_template
+/gpl-3.0.texi
 /refcard.dvi
 /refcard.log
 /refcard.ps
 /stamp-vti
 /version.texi
 /yacc.1
-
@@ -391,7 +391,7 @@ EXCLUDE                = @top_srcdir@/src/scan-gram.c \
 	                 @top_builddir@/src/parse-*.[ch]

 # The EXCLUDE_SYMLINKS tag can be used select whether or not files or
-# directories that are symbolic links (a Unix filesystem feature) are
+# directories that are symbolic links (a Unix file system feature) are
 # excluded from the input.

 EXCLUDE_SYMLINKS       = YES
@@ -982,7 +982,7 @@ CLASS_GRAPH            = YES
 COLLABORATION_GRAPH    = YES

 # If the UML_LOOK tag is set to YES doxygen will generate inheritance and
-# collaboration diagrams in a style similiar to the OMG's Unified Modeling
+# collaboration diagrams in a style similar to the OMG's Unified Modeling
 # Language.

 UML_LOOK               = NO
@@ -1,6 +1,6 @@
 ## Process this file with automake to produce Makefile.in -*-Makefile-*-

-## Copyright (C) 2001-2003, 2005-2011 Free Software Foundation, Inc.
+## Copyright (C) 2001-2003, 2005-2012 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
@@ -26,13 +26,13 @@ clean-local:

 CROSS_OPTIONS_PL = $(top_srcdir)/build-aux/cross-options.pl
 $(srcdir)/cross-options.texi: $(top_srcdir)/src/getargs.c $(CROSS_OPTIONS_PL)
-	mv -f $@ $@~ || : >$@~
-	-rm -f $@.tmp
-	cd $(top_builddir)/src && $(MAKE) $(AM_MAKEFLAGS) bison
-	$(top_builddir)/src/bison --help \
+	$(AM_V_GEN)mv -f $@ $@~ || : >$@~
+	$(AM_V_at)rm -f $@.tmp
+	$(AM_V_at)cd $(top_builddir)/src && $(MAKE) $(AM_MAKEFLAGS) bison
+	$(AM_V_at)$(top_builddir)/src/bison --help \
 	  | perl $(CROSS_OPTIONS_PL) $(top_srcdir)/src/scan-gram.l >$@.tmp
-	diff -u $@~ $@.tmp || true
-	mv $@.tmp $@
+	$(AM_V_at)diff -u $@~ $@.tmp || true
+	$(AM_V_at)mv $@.tmp $@
 MAINTAINERCLEANFILES = $(srcdir)/cross-options.texi

 ## ---------- ##
@@ -43,7 +43,7 @@ EXTRA_DIST = refcard.tex
 CLEANFILES += refcard.dvi refcard.log refcard.ps

 refcard.dvi: refcard.tex
-	tex refcard.tex
+	$(AM_V_GEN)tex refcard.tex

 refcard.ps: refcard.dvi

@@ -72,7 +72,7 @@ SUFFIXES = .x .1

 PREPATH = $(top_builddir)/src
 .x.1:
-	@program=`expr "/$*" : '.*/\(.*\)'` &&				\
+	$(AM_V_GEN)program=`expr "/$*" : '.*/\(.*\)'` &&		\
 	save_IFS=$IFS;							\
 	IFS=$(PATH_SEPARATOR);						\
 	for dir in $(PREPATH); do					\
@@ -80,20 +80,19 @@ PREPATH = $(top_builddir)/src
 	  echo cd $$dir '&&' $(MAKE) $(AM_MAKEFLAGS) $$program &&	\
 	  (cd $$dir && $(MAKE) $(AM_MAKEFLAGS) $$program) || exit;	\
 	done
-	@echo "Updating man page $@"
-	PATH="$(PREPATH)$(PATH_SEPARATOR)$$PATH";			     \
+	$(AM_V_at)PATH="$(PREPATH)$(PATH_SEPARATOR)$$PATH";		     \
 	export PATH;							     \
 	$(HELP2MAN)							     \
 	    --include=$*.x						     \
 	    --include=$(srcdir)/common.x				     \
 	    --output=$@.t `echo '$*' | sed 's,.*/,,'`
-	if $(remove_time_stamp) $@ >$@a.t 2>/dev/null &&		     \
+	$(AM_V_at)if $(remove_time_stamp) $@ >$@a.t 2>/dev/null &&	     \
 	   $(remove_time_stamp) $@.t | cmp $@a.t - >/dev/null 2>&1; then     \
 		touch $@;						     \
 	else								     \
 		mv $@.t $@;						     \
 	fi
-	rm -f $@*.t
+	$(AM_V_at)rm -f $@*.t

 nodist_man_MANS = yacc.1

@@ -120,6 +119,6 @@ CLEANFILES += Doxyfile
 # Sed is used to generate Doxyfile from Doxyfile.in instead of
 # configure, because the former is way faster than the latter.
 Doxyfile: $(srcdir)/Doxyfile.in
-	$(edit) $(srcdir)/Doxyfile.in >Doxyfile
+	$(AM_V_GEN)$(edit) $(srcdir)/Doxyfile.in >Doxyfile

 CLEANDIRS += html latex
@@ -1,506 +0,0 @@
-@c The GNU Free Documentation License.
-@center Version 1.3, 3 November 2008
-
-@c This file is intended to be included within another document,
-@c hence no sectioning command or @node.
-
-@display
-Copyright @copyright{} 2000, 2001, 2002, 2007, 2008 Free Software Foundation, Inc.
-@uref{http://fsf.org/}
-
-Everyone is permitted to copy and distribute verbatim copies
-of this license document, but changing it is not allowed.
-@end display
-
-@enumerate 0
-@item
-PREAMBLE
-
-The purpose of this License is to make a manual, textbook, or other
-functional and useful document @dfn{free} in the sense of freedom: to
-assure everyone the effective freedom to copy and redistribute it,
-with or without modifying it, either commercially or noncommercially.
-Secondarily, this License preserves for the author and publisher a way
-to get credit for their work, while not being considered responsible
-for modifications made by others.
-
-This License is a kind of ``copyleft'', which means that derivative
-works of the document must themselves be free in the same sense.  It
-complements the GNU General Public License, which is a copyleft
-license designed for free software.
-
-We have designed this License in order to use it for manuals for free
-software, because free software needs free documentation: a free
-program should come with manuals providing the same freedoms that the
-software does.  But this License is not limited to software manuals;
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-whether it is published as a printed book.  We recommend this License
-principally for works whose purpose is instruction or reference.
-
-@item
-APPLICABILITY AND DEFINITIONS
-
-This License applies to any manual or other work, in any medium, that
-contains a notice placed by the copyright holder saying it can be
-distributed under the terms of this License.  Such a notice grants a
-world-wide, royalty-free license, unlimited in duration, to use that
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-A ``Modified Version'' of the Document means any work containing the
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-The ``Invariant Sections'' are certain Secondary Sections whose titles
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-A ``Transparent'' copy of the Document means a machine-readable copy,
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-no effect on the meaning of this License.
-
-@item
-VERBATIM COPYING
-
-You may copy and distribute the Document in any medium, either
-commercially or noncommercially, provided that this License, the
-copyright notices, and the license notice saying this License applies
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-You may also lend copies, under the same conditions stated above, and
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-@item
-COPYING IN QUANTITY
-
-If you publish printed copies (or copies in media that commonly have
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-Document's license notice requires Cover Texts, you must enclose the
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-as verbatim copying in other respects.
-
-If the required texts for either cover are too voluminous to fit
-legibly, you should put the first ones listed (as many as fit
-reasonably) on the actual cover, and continue the rest onto adjacent
-pages.
-
-If you publish or distribute Opaque copies of the Document numbering
-more than 100, you must either include a machine-readable Transparent
-copy along with each Opaque copy, or state in or with each Opaque copy
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-a complete Transparent copy of the Document, free of added material.
-If you use the latter option, you must take reasonably prudent steps,
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-It is requested, but not required, that you contact the authors of the
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-
-@item
-MODIFICATIONS
-
-You may copy and distribute a Modified Version of the Document under
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-Version filling the role of the Document, thus licensing distribution
-and modification of the Modified Version to whoever possesses a copy
-of it.  In addition, you must do these things in the Modified Version:
-
-@enumerate A
-@item
-Use in the Title Page (and on the covers, if any) a title distinct
-from that of the Document, and from those of previous versions
-(which should, if there were any, be listed in the History section
-of the Document).  You may use the same title as a previous version
-if the original publisher of that version gives permission.
-
-@item
-List on the Title Page, as authors, one or more persons or entities
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-unless they release you from this requirement.
-
-@item
-State on the Title page the name of the publisher of the
-Modified Version, as the publisher.
-
-@item
-Preserve all the copyright notices of the Document.
-
-@item
-Add an appropriate copyright notice for your modifications
-adjacent to the other copyright notices.
-
-@item
-Include, immediately after the copyright notices, a license notice
-giving the public permission to use the Modified Version under the
-terms of this License, in the form shown in the Addendum below.
-
-@item
-Preserve in that license notice the full lists of Invariant Sections
-and required Cover Texts given in the Document's license notice.
-
-@item
-Include an unaltered copy of this License.
-
-@item
-Preserve the section Entitled ``History'', Preserve its Title, and add
-to it an item stating at least the title, year, new authors, and
-publisher of the Modified Version as given on the Title Page.  If
-there is no section Entitled ``History'' in the Document, create one
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-
-@item
-Preserve the network location, if any, given in the Document for
-public access to a Transparent copy of the Document, and likewise
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-it was based on.  These may be placed in the ``History'' section.
-You may omit a network location for a work that was published at
-least four years before the Document itself, or if the original
-publisher of the version it refers to gives permission.
-
-@item
-For any section Entitled ``Acknowledgements'' or ``Dedications'', Preserve
-the Title of the section, and preserve in the section all the
-substance and tone of each of the contributor acknowledgements and/or
-dedications given therein.
-
-@item
-Preserve all the Invariant Sections of the Document,
-unaltered in their text and in their titles.  Section numbers
-or the equivalent are not considered part of the section titles.
-
-@item
-Delete any section Entitled ``Endorsements''.  Such a section
-may not be included in the Modified Version.
-
-@item
-Do not retitle any existing section to be Entitled ``Endorsements'' or
-to conflict in title with any Invariant Section.
-
-@item
-Preserve any Warranty Disclaimers.
-@end enumerate
-
-If the Modified Version includes new front-matter sections or
-appendices that qualify as Secondary Sections and contain no material
-copied from the Document, you may at your option designate some or all
-of these sections as invariant.  To do this, add their titles to the
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-These titles must be distinct from any other section titles.
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-You may add a section Entitled ``Endorsements'', provided it contains
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-You may add a passage of up to five words as a Front-Cover Text, and a
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-The author(s) and publisher(s) of the Document do not by this License
-give permission to use their names for publicity for or to assert or
-imply endorsement of any Modified Version.
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-@item
-COMBINING DOCUMENTS
-
-You may combine the Document with other documents released under this
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-@item
-COLLECTIONS OF DOCUMENTS
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-
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-AGGREGATION WITH INDEPENDENT WORKS
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-@item
-TERMINATION
-
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-
-@item
-FUTURE REVISIONS OF THIS LICENSE
-
-The Free Software Foundation may publish new, revised versions
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-Document.
-
-@item
-RELICENSING
-
-``Massive Multiauthor Collaboration Site'' (or ``MMC Site'') means any
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-provided the MMC is eligible for relicensing.
-
-@end enumerate
-
-@page
-@heading ADDENDUM: How to use this License for your documents
-
-To use this License in a document you have written, include a copy of
-the License in the document and put the following copyright and
-license notices just after the title page:
-
-@smallexample
-@group
-  Copyright (C)  @var{year}  @var{your name}.
-  Permission is granted to copy, distribute and/or modify this document
-  under the terms of the GNU Free Documentation License, Version 1.3
-  or any later version published by the Free Software Foundation;
-  with no Invariant Sections, no Front-Cover Texts, and no Back-Cover
-  Texts.  A copy of the license is included in the section entitled ``GNU
-  Free Documentation License''.
-@end group
-@end smallexample
-
-If you have Invariant Sections, Front-Cover Texts and Back-Cover Texts,
-replace the ``with@dots{}Texts.'' line with this:
-
-@smallexample
-@group
-    with the Invariant Sections being @var{list their titles}, with
-    the Front-Cover Texts being @var{list}, and with the Back-Cover Texts
-    being @var{list}.
-@end group
-@end smallexample
-
-If you have Invariant Sections without Cover Texts, or some other
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-
-If your document contains nontrivial examples of program code, we
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-to permit their use in free software.
-
-@c Local Variables:
-@c ispell-local-pdict: "ispell-dict"
-@c End:
-
@@ -1,717 +0,0 @@
-@c The GNU General Public License.
-@center Version 3, 29 June 2007
-
-@c This file is intended to be included within another document,
-@c hence no sectioning command or @node.  
-
-@display
-Copyright @copyright{} 2007 Free Software Foundation, Inc. @url{http://fsf.org/}
-
-Everyone is permitted to copy and distribute verbatim copies of this
-license document, but changing it is not allowed.
-@end display
-
-@heading Preamble
-
-The GNU General Public License is a free, copyleft license for
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-The licenses for most software and other practical works are designed
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-can apply it to your programs, too.
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-terms so they know their rights.
-
-Developers that use the GNU GPL protect your rights with two steps:
-(1) assert copyright on the software, and (2) offer you this License
-giving you legal permission to copy, distribute and/or modify it.
-
-For the developers' and authors' protection, the GPL clearly explains
-that there is no warranty for this free software.  For both users' and
-authors' sake, the GPL requires that modified versions be marked as
-changed, so that their problems will not be attributed erroneously to
-authors of previous versions.
-
-Some devices are designed to deny users access to install or run
-modified versions of the software inside them, although the
-manufacturer can do so.  This is fundamentally incompatible with the
-aim of protecting users' freedom to change the software.  The
-systematic pattern of such abuse occurs in the area of products for
-individuals to use, which is precisely where it is most unacceptable.
-Therefore, we have designed this version of the GPL to prohibit the
-practice for those products.  If such problems arise substantially in
-other domains, we stand ready to extend this provision to those
-domains in future versions of the GPL, as needed to protect the
-freedom of users.
-
-Finally, every program is threatened constantly by software patents.
-States should not allow patents to restrict development and use of
-software on general-purpose computers, but in those that do, we wish
-to avoid the special danger that patents applied to a free program
-could make it effectively proprietary.  To prevent this, the GPL
-assures that patents cannot be used to render the program non-free.
-
-The precise terms and conditions for copying, distribution and
-modification follow.
-
-@heading TERMS AND CONDITIONS
-
-@enumerate 0
-@item Definitions.
-
-``This License'' refers to version 3 of the GNU General Public License.
-
-``Copyright'' also means copyright-like laws that apply to other kinds
-of works, such as semiconductor masks.
-
-``The Program'' refers to any copyrightable work licensed under this
-License.  Each licensee is addressed as ``you''.  ``Licensees'' and
-``recipients'' may be individuals or organizations.
-
-To ``modify'' a work means to copy from or adapt all or part of the work
-in a fashion requiring copyright permission, other than the making of
-an exact copy.  The resulting work is called a ``modified version'' of
-the earlier work or a work ``based on'' the earlier work.
-
-A ``covered work'' means either the unmodified Program or a work based
-on the Program.
-
-To ``propagate'' a work means to do anything with it that, without
-permission, would make you directly or secondarily liable for
-infringement under applicable copyright law, except executing it on a
-computer or modifying a private copy.  Propagation includes copying,
-distribution (with or without modification), making available to the
-public, and in some countries other activities as well.
-
-To ``convey'' a work means any kind of propagation that enables other
-parties to make or receive copies.  Mere interaction with a user
-through a computer network, with no transfer of a copy, is not
-conveying.
-
-An interactive user interface displays ``Appropriate Legal Notices'' to
-the extent that it includes a convenient and prominently visible
-feature that (1) displays an appropriate copyright notice, and (2)
-tells the user that there is no warranty for the work (except to the
-extent that warranties are provided), that licensees may convey the
-work under this License, and how to view a copy of this License.  If
-the interface presents a list of user commands or options, such as a
-menu, a prominent item in the list meets this criterion.
-
-@item Source Code.
-
-The ``source code'' for a work means the preferred form of the work for
-making modifications to it.  ``Object code'' means any non-source form
-of a work.
-
-A ``Standard Interface'' means an interface that either is an official
-standard defined by a recognized standards body, or, in the case of
-interfaces specified for a particular programming language, one that
-is widely used among developers working in that language.
-
-The ``System Libraries'' of an executable work include anything, other
-than the work as a whole, that (a) is included in the normal form of
-packaging a Major Component, but which is not part of that Major
-Component, and (b) serves only to enable use of the work with that
-Major Component, or to implement a Standard Interface for which an
-implementation is available to the public in source code form.  A
-``Major Component'', in this context, means a major essential component
-(kernel, window system, and so on) of the specific operating system
-(if any) on which the executable work runs, or a compiler used to
-produce the work, or an object code interpreter used to run it.
-
-The ``Corresponding Source'' for a work in object code form means all
-the source code needed to generate, install, and (for an executable
-work) run the object code and to modify the work, including scripts to
-control those activities.  However, it does not include the work's
-System Libraries, or general-purpose tools or generally available free
-programs which are used unmodified in performing those activities but
-which are not part of the work.  For example, Corresponding Source
-includes interface definition files associated with source files for
-the work, and the source code for shared libraries and dynamically
-linked subprograms that the work is specifically designed to require,
-such as by intimate data communication or control flow between those
-subprograms and other parts of the work.
-
-The Corresponding Source need not include anything that users can
-regenerate automatically from other parts of the Corresponding Source.
-
-The Corresponding Source for a work in source code form is that same
-work.
-
-@item Basic Permissions.
-
-All rights granted under this License are granted for the term of
-copyright on the Program, and are irrevocable provided the stated
-conditions are met.  This License explicitly affirms your unlimited
-permission to run the unmodified Program.  The output from running a
-covered work is covered by this License only if the output, given its
-content, constitutes a covered work.  This License acknowledges your
-rights of fair use or other equivalent, as provided by copyright law.
-
-You may make, run and propagate covered works that you do not convey,
-without conditions so long as your license otherwise remains in force.
-You may convey covered works to others for the sole purpose of having
-them make modifications exclusively for you, or provide you with
-facilities for running those works, provided that you comply with the
-terms of this License in conveying all material for which you do not
-control copyright.  Those thus making or running the covered works for
-you must do so exclusively on your behalf, under your direction and
-control, on terms that prohibit them from making any copies of your
-copyrighted material outside their relationship with you.
-
-Conveying under any other circumstances is permitted solely under the
-conditions stated below.  Sublicensing is not allowed; section 10
-makes it unnecessary.
-
-@item Protecting Users' Legal Rights From Anti-Circumvention Law.
-
-No covered work shall be deemed part of an effective technological
-measure under any applicable law fulfilling obligations under article
-11 of the WIPO copyright treaty adopted on 20 December 1996, or
-similar laws prohibiting or restricting circumvention of such
-measures.
-
-When you convey a covered work, you waive any legal power to forbid
-circumvention of technological measures to the extent such
-circumvention is effected by exercising rights under this License with
-respect to the covered work, and you disclaim any intention to limit
-operation or modification of the work as a means of enforcing, against
-the work's users, your or third parties' legal rights to forbid
-circumvention of technological measures.
-
-@item Conveying Verbatim Copies.
-
-You may convey verbatim copies of the Program's source code as you
-receive it, in any medium, provided that you conspicuously and
-appropriately publish on each copy an appropriate copyright notice;
-keep intact all notices stating that this License and any
-non-permissive terms added in accord with section 7 apply to the code;
-keep intact all notices of the absence of any warranty; and give all
-recipients a copy of this License along with the Program.
-
-You may charge any price or no price for each copy that you convey,
-and you may offer support or warranty protection for a fee.
-
-@item Conveying Modified Source Versions.
-
-You may convey a work based on the Program, or the modifications to
-produce it from the Program, in the form of source code under the
-terms of section 4, provided that you also meet all of these
-conditions:
-
-@enumerate a
-@item 
-The work must carry prominent notices stating that you modified it,
-and giving a relevant date.
-
-@item
-The work must carry prominent notices stating that it is released
-under this License and any conditions added under section 7.  This
-requirement modifies the requirement in section 4 to ``keep intact all
-notices''.
-
-@item
-You must license the entire work, as a whole, under this License to
-anyone who comes into possession of a copy.  This License will
-therefore apply, along with any applicable section 7 additional terms,
-to the whole of the work, and all its parts, regardless of how they
-are packaged.  This License gives no permission to license the work in
-any other way, but it does not invalidate such permission if you have
-separately received it.
-
-@item
-If the work has interactive user interfaces, each must display
-Appropriate Legal Notices; however, if the Program has interactive
-interfaces that do not display Appropriate Legal Notices, your work
-need not make them do so.
-@end enumerate
-
-A compilation of a covered work with other separate and independent
-works, which are not by their nature extensions of the covered work,
-and which are not combined with it such as to form a larger program,
-in or on a volume of a storage or distribution medium, is called an
-``aggregate'' if the compilation and its resulting copyright are not
-used to limit the access or legal rights of the compilation's users
-beyond what the individual works permit.  Inclusion of a covered work
-in an aggregate does not cause this License to apply to the other
-parts of the aggregate.
-
-@item  Conveying Non-Source Forms.
-
-You may convey a covered work in object code form under the terms of
-sections 4 and 5, provided that you also convey the machine-readable
-Corresponding Source under the terms of this License, in one of these
-ways:
-
-@enumerate a
-@item
-Convey the object code in, or embodied in, a physical product
-(including a physical distribution medium), accompanied by the
-Corresponding Source fixed on a durable physical medium customarily
-used for software interchange.
-
-@item
-Convey the object code in, or embodied in, a physical product
-(including a physical distribution medium), accompanied by a written
-offer, valid for at least three years and valid for as long as you
-offer spare parts or customer support for that product model, to give
-anyone who possesses the object code either (1) a copy of the
-Corresponding Source for all the software in the product that is
-covered by this License, on a durable physical medium customarily used
-for software interchange, for a price no more than your reasonable
-cost of physically performing this conveying of source, or (2) access
-to copy the Corresponding Source from a network server at no charge.
-
-@item
-Convey individual copies of the object code with a copy of the written
-offer to provide the Corresponding Source.  This alternative is
-allowed only occasionally and noncommercially, and only if you
-received the object code with such an offer, in accord with subsection
-6b.
-
-@item
-Convey the object code by offering access from a designated place
-(gratis or for a charge), and offer equivalent access to the
-Corresponding Source in the same way through the same place at no
-further charge.  You need not require recipients to copy the
-Corresponding Source along with the object code.  If the place to copy
-the object code is a network server, the Corresponding Source may be
-on a different server (operated by you or a third party) that supports
-equivalent copying facilities, provided you maintain clear directions
-next to the object code saying where to find the Corresponding Source.
-Regardless of what server hosts the Corresponding Source, you remain
-obligated to ensure that it is available for as long as needed to
-satisfy these requirements.
-
-@item
-Convey the object code using peer-to-peer transmission, provided you
-inform other peers where the object code and Corresponding Source of
-the work are being offered to the general public at no charge under
-subsection 6d.
-
-@end enumerate
-
-A separable portion of the object code, whose source code is excluded
-from the Corresponding Source as a System Library, need not be
-included in conveying the object code work.
-
-A ``User Product'' is either (1) a ``consumer product'', which means any
-tangible personal property which is normally used for personal,
-family, or household purposes, or (2) anything designed or sold for
-incorporation into a dwelling.  In determining whether a product is a
-consumer product, doubtful cases shall be resolved in favor of
-coverage.  For a particular product received by a particular user,
-``normally used'' refers to a typical or common use of that class of
-product, regardless of the status of the particular user or of the way
-in which the particular user actually uses, or expects or is expected
-to use, the product.  A product is a consumer product regardless of
-whether the product has substantial commercial, industrial or
-non-consumer uses, unless such uses represent the only significant
-mode of use of the product.
-
-``Installation Information'' for a User Product means any methods,
-procedures, authorization keys, or other information required to
-install and execute modified versions of a covered work in that User
-Product from a modified version of its Corresponding Source.  The
-information must suffice to ensure that the continued functioning of
-the modified object code is in no case prevented or interfered with
-solely because modification has been made.
-
-If you convey an object code work under this section in, or with, or
-specifically for use in, a User Product, and the conveying occurs as
-part of a transaction in which the right of possession and use of the
-User Product is transferred to the recipient in perpetuity or for a
-fixed term (regardless of how the transaction is characterized), the
-Corresponding Source conveyed under this section must be accompanied
-by the Installation Information.  But this requirement does not apply
-if neither you nor any third party retains the ability to install
-modified object code on the User Product (for example, the work has
-been installed in ROM).
-
-The requirement to provide Installation Information does not include a
-requirement to continue to provide support service, warranty, or
-updates for a work that has been modified or installed by the
-recipient, or for the User Product in which it has been modified or
-installed.  Access to a network may be denied when the modification
-itself materially and adversely affects the operation of the network
-or violates the rules and protocols for communication across the
-network.
-
-Corresponding Source conveyed, and Installation Information provided,
-in accord with this section must be in a format that is publicly
-documented (and with an implementation available to the public in
-source code form), and must require no special password or key for
-unpacking, reading or copying.
-
-@item Additional Terms.
-
-``Additional permissions'' are terms that supplement the terms of this
-License by making exceptions from one or more of its conditions.
-Additional permissions that are applicable to the entire Program shall
-be treated as though they were included in this License, to the extent
-that they are valid under applicable law.  If additional permissions
-apply only to part of the Program, that part may be used separately
-under those permissions, but the entire Program remains governed by
-this License without regard to the additional permissions.
-
-When you convey a copy of a covered work, you may at your option
-remove any additional permissions from that copy, or from any part of
-it.  (Additional permissions may be written to require their own
-removal in certain cases when you modify the work.)  You may place
-additional permissions on material, added by you to a covered work,
-for which you have or can give appropriate copyright permission.
-
-Notwithstanding any other provision of this License, for material you
-add to a covered work, you may (if authorized by the copyright holders
-of that material) supplement the terms of this License with terms:
-
-@enumerate a
-@item
-Disclaiming warranty or limiting liability differently from the terms
-of sections 15 and 16 of this License; or
-
-@item
-Requiring preservation of specified reasonable legal notices or author
-attributions in that material or in the Appropriate Legal Notices
-displayed by works containing it; or
-
-@item
-Prohibiting misrepresentation of the origin of that material, or
-requiring that modified versions of such material be marked in
-reasonable ways as different from the original version; or
-
-@item
-Limiting the use for publicity purposes of names of licensors or
-authors of the material; or
-
-@item
-Declining to grant rights under trademark law for use of some trade
-names, trademarks, or service marks; or
-
-@item
-Requiring indemnification of licensors and authors of that material by
-anyone who conveys the material (or modified versions of it) with
-contractual assumptions of liability to the recipient, for any
-liability that these contractual assumptions directly impose on those
-licensors and authors.
-@end enumerate
-
-All other non-permissive additional terms are considered ``further
-restrictions'' within the meaning of section 10.  If the Program as you
-received it, or any part of it, contains a notice stating that it is
-governed by this License along with a term that is a further
-restriction, you may remove that term.  If a license document contains
-a further restriction but permits relicensing or conveying under this
-License, you may add to a covered work material governed by the terms
-of that license document, provided that the further restriction does
-not survive such relicensing or conveying.
-
-If you add terms to a covered work in accord with this section, you
-must place, in the relevant source files, a statement of the
-additional terms that apply to those files, or a notice indicating
-where to find the applicable terms.
-
-Additional terms, permissive or non-permissive, may be stated in the
-form of a separately written license, or stated as exceptions; the
-above requirements apply either way.
-
-@item Termination.
-
-You may not propagate or modify a covered work except as expressly
-provided under this License.  Any attempt otherwise to propagate or
-modify it is void, and will automatically terminate your rights under
-this License (including any patent licenses granted under the third
-paragraph of section 11).
-
-However, if you cease all violation of this License, then your license
-from a particular copyright holder is reinstated (a) provisionally,
-unless and until the copyright holder explicitly and finally
-terminates your license, and (b) permanently, if the copyright holder
-fails to notify you of the violation by some reasonable means prior to
-60 days after the cessation.
-
-Moreover, your license from a particular copyright holder is
-reinstated permanently if the copyright holder notifies you of the
-violation by some reasonable means, this is the first time you have
-received notice of violation of this License (for any work) from that
-copyright holder, and you cure the violation prior to 30 days after
-your receipt of the notice.
-
-Termination of your rights under this section does not terminate the
-licenses of parties who have received copies or rights from you under
-this License.  If your rights have been terminated and not permanently
-reinstated, you do not qualify to receive new licenses for the same
-material under section 10.
-
-@item Acceptance Not Required for Having Copies.
-
-You are not required to accept this License in order to receive or run
-a copy of the Program.  Ancillary propagation of a covered work
-occurring solely as a consequence of using peer-to-peer transmission
-to receive a copy likewise does not require acceptance.  However,
-nothing other than this License grants you permission to propagate or
-modify any covered work.  These actions infringe copyright if you do
-not accept this License.  Therefore, by modifying or propagating a
-covered work, you indicate your acceptance of this License to do so.
-
-@item Automatic Licensing of Downstream Recipients.
-
-Each time you convey a covered work, the recipient automatically
-receives a license from the original licensors, to run, modify and
-propagate that work, subject to this License.  You are not responsible
-for enforcing compliance by third parties with this License.
-
-An ``entity transaction'' is a transaction transferring control of an
-organization, or substantially all assets of one, or subdividing an
-organization, or merging organizations.  If propagation of a covered
-work results from an entity transaction, each party to that
-transaction who receives a copy of the work also receives whatever
-licenses to the work the party's predecessor in interest had or could
-give under the previous paragraph, plus a right to possession of the
-Corresponding Source of the work from the predecessor in interest, if
-the predecessor has it or can get it with reasonable efforts.
-
-You may not impose any further restrictions on the exercise of the
-rights granted or affirmed under this License.  For example, you may
-not impose a license fee, royalty, or other charge for exercise of
-rights granted under this License, and you may not initiate litigation
-(including a cross-claim or counterclaim in a lawsuit) alleging that
-any patent claim is infringed by making, using, selling, offering for
-sale, or importing the Program or any portion of it.
-
-@item Patents.
-
-A ``contributor'' is a copyright holder who authorizes use under this
-License of the Program or a work on which the Program is based.  The
-work thus licensed is called the contributor's ``contributor version''.
-
-A contributor's ``essential patent claims'' are all patent claims owned
-or controlled by the contributor, whether already acquired or
-hereafter acquired, that would be infringed by some manner, permitted
-by this License, of making, using, or selling its contributor version,
-but do not include claims that would be infringed only as a
-consequence of further modification of the contributor version.  For
-purposes of this definition, ``control'' includes the right to grant
-patent sublicenses in a manner consistent with the requirements of
-this License.
-
-Each contributor grants you a non-exclusive, worldwide, royalty-free
-patent license under the contributor's essential patent claims, to
-make, use, sell, offer for sale, import and otherwise run, modify and
-propagate the contents of its contributor version.
-
-In the following three paragraphs, a ``patent license'' is any express
-agreement or commitment, however denominated, not to enforce a patent
-(such as an express permission to practice a patent or covenant not to
-sue for patent infringement).  To ``grant'' such a patent license to a
-party means to make such an agreement or commitment not to enforce a
-patent against the party.
-
-If you convey a covered work, knowingly relying on a patent license,
-and the Corresponding Source of the work is not available for anyone
-to copy, free of charge and under the terms of this License, through a
-publicly available network server or other readily accessible means,
-then you must either (1) cause the Corresponding Source to be so
-available, or (2) arrange to deprive yourself of the benefit of the
-patent license for this particular work, or (3) arrange, in a manner
-consistent with the requirements of this License, to extend the patent
-license to downstream recipients.  ``Knowingly relying'' means you have
-actual knowledge that, but for the patent license, your conveying the
-covered work in a country, or your recipient's use of the covered work
-in a country, would infringe one or more identifiable patents in that
-country that you have reason to believe are valid.
-
-If, pursuant to or in connection with a single transaction or
-arrangement, you convey, or propagate by procuring conveyance of, a
-covered work, and grant a patent license to some of the parties
-receiving the covered work authorizing them to use, propagate, modify
-or convey a specific copy of the covered work, then the patent license
-you grant is automatically extended to all recipients of the covered
-work and works based on it.
-
-A patent license is ``discriminatory'' if it does not include within the
-scope of its coverage, prohibits the exercise of, or is conditioned on
-the non-exercise of one or more of the rights that are specifically
-granted under this License.  You may not convey a covered work if you
-are a party to an arrangement with a third party that is in the
-business of distributing software, under which you make payment to the
-third party based on the extent of your activity of conveying the
-work, and under which the third party grants, to any of the parties
-who would receive the covered work from you, a discriminatory patent
-license (a) in connection with copies of the covered work conveyed by
-you (or copies made from those copies), or (b) primarily for and in
-connection with specific products or compilations that contain the
-covered work, unless you entered into that arrangement, or that patent
-license was granted, prior to 28 March 2007.
-
-Nothing in this License shall be construed as excluding or limiting
-any implied license or other defenses to infringement that may
-otherwise be available to you under applicable patent law.
-
-@item No Surrender of Others' Freedom.
-
-If conditions are imposed on you (whether by court order, agreement or
-otherwise) that contradict the conditions of this License, they do not
-excuse you from the conditions of this License.  If you cannot convey
-a covered work so as to satisfy simultaneously your obligations under
-this License and any other pertinent obligations, then as a
-consequence you may not convey it at all.  For example, if you agree
-to terms that obligate you to collect a royalty for further conveying
-from those to whom you convey the Program, the only way you could
-satisfy both those terms and this License would be to refrain entirely
-from conveying the Program.
-
-@item Use with the GNU Affero General Public License.
-
-Notwithstanding any other provision of this License, you have
-permission to link or combine any covered work with a work licensed
-under version 3 of the GNU Affero General Public License into a single
-combined work, and to convey the resulting work.  The terms of this
-License will continue to apply to the part which is the covered work,
-but the special requirements of the GNU Affero General Public License,
-section 13, concerning interaction through a network will apply to the
-combination as such.
-
-@item Revised Versions of this License.
-
-The Free Software Foundation may publish revised and/or new versions
-of the GNU General Public License from time to time.  Such new
-versions will be similar in spirit to the present version, but may
-differ in detail to address new problems or concerns.
-
-Each version is given a distinguishing version number.  If the Program
-specifies that a certain numbered version of the GNU General Public
-License ``or any later version'' applies to it, you have the option of
-following the terms and conditions either of that numbered version or
-of any later version published by the Free Software Foundation.  If
-the Program does not specify a version number of the GNU General
-Public License, you may choose any version ever published by the Free
-Software Foundation.
-
-If the Program specifies that a proxy can decide which future versions
-of the GNU General Public License can be used, that proxy's public
-statement of acceptance of a version permanently authorizes you to
-choose that version for the Program.
-
-Later license versions may give you additional or different
-permissions.  However, no additional obligations are imposed on any
-author or copyright holder as a result of your choosing to follow a
-later version.
-
-@item Disclaimer of Warranty.
-
-THERE IS NO WARRANTY FOR THE PROGRAM, TO THE EXTENT PERMITTED BY
-APPLICABLE LAW.  EXCEPT WHEN OTHERWISE STATED IN WRITING THE COPYRIGHT
-HOLDERS AND/OR OTHER PARTIES PROVIDE THE PROGRAM ``AS IS'' WITHOUT
-WARRANTY OF ANY KIND, EITHER EXPRESSED OR IMPLIED, INCLUDING, BUT NOT
-LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
-A PARTICULAR PURPOSE.  THE ENTIRE RISK AS TO THE QUALITY AND
-PERFORMANCE OF THE PROGRAM IS WITH YOU.  SHOULD THE PROGRAM PROVE
-DEFECTIVE, YOU ASSUME THE COST OF ALL NECESSARY SERVICING, REPAIR OR
-CORRECTION.
-
-@item Limitation of Liability.
-
-IN NO EVENT UNLESS REQUIRED BY APPLICABLE LAW OR AGREED TO IN WRITING
-WILL ANY COPYRIGHT HOLDER, OR ANY OTHER PARTY WHO MODIFIES AND/OR
-CONVEYS THE PROGRAM AS PERMITTED ABOVE, BE LIABLE TO YOU FOR DAMAGES,
-INCLUDING ANY GENERAL, SPECIAL, INCIDENTAL OR CONSEQUENTIAL DAMAGES
-ARISING OUT OF THE USE OR INABILITY TO USE THE PROGRAM (INCLUDING BUT
-NOT LIMITED TO LOSS OF DATA OR DATA BEING RENDERED INACCURATE OR
-LOSSES SUSTAINED BY YOU OR THIRD PARTIES OR A FAILURE OF THE PROGRAM
-TO OPERATE WITH ANY OTHER PROGRAMS), EVEN IF SUCH HOLDER OR OTHER
-PARTY HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES.
-
-@item Interpretation of Sections 15 and 16.
-
-If the disclaimer of warranty and limitation of liability provided
-above cannot be given local legal effect according to their terms,
-reviewing courts shall apply local law that most closely approximates
-an absolute waiver of all civil liability in connection with the
-Program, unless a warranty or assumption of liability accompanies a
-copy of the Program in return for a fee.
-
-@end enumerate
-
-@heading END OF TERMS AND CONDITIONS
-
-@heading How to Apply These Terms to Your New Programs
-
-If you develop a new program, and you want it to be of the greatest
-possible use to the public, the best way to achieve this is to make it
-free software which everyone can redistribute and change under these
-terms.
-
-To do so, attach the following notices to the program.  It is safest
-to attach them to the start of each source file to most effectively
-state the exclusion of warranty; and each file should have at least
-the ``copyright'' line and a pointer to where the full notice is found.
-
-@smallexample
-@var{one line to give the program's name and a brief idea of what it does.}  
-Copyright (C) @var{year} @var{name of author}
-
-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 @url{http://www.gnu.org/licenses/}.
-@end smallexample
-
-Also add information on how to contact you by electronic and paper mail.
-
-If the program does terminal interaction, make it output a short
-notice like this when it starts in an interactive mode:
-
-@smallexample
-@var{program} Copyright (C) @var{year} @var{name of author} 
-This program comes with ABSOLUTELY NO WARRANTY; for details type @samp{show w}.
-This is free software, and you are welcome to redistribute it
-under certain conditions; type @samp{show c} for details.
-@end smallexample
-
-The hypothetical commands @samp{show w} and @samp{show c} should show
-the appropriate parts of the General Public License.  Of course, your
-program's commands might be different; for a GUI interface, you would
-use an ``about box''.
-
-You should also get your employer (if you work as a programmer) or school,
-if any, to sign a ``copyright disclaimer'' for the program, if necessary.
-For more information on this, and how to apply and follow the GNU GPL, see
-@url{http://www.gnu.org/licenses/}.
-
-The GNU General Public License does not permit incorporating your
-program into proprietary programs.  If your program is a subroutine
-library, you may consider it more useful to permit linking proprietary
-applications with the library.  If this is what you want to do, use
-the GNU Lesser General Public License instead of this License.  But
-first, please read @url{http://www.gnu.org/philosophy/why-not-lgpl.html}.
@@ -19,7 +19,7 @@
 \def\finalout{\overfullrule=0pt}
 %\finalout

-% Copyright (c) 1998, 2001, 2009-2011 Free Software Foundation, Inc.
+% Copyright (c) 1998, 2001, 2009-2012 Free Software Foundation, Inc.
 %
 % This file is part of Bison.
 %
@@ -1,4 +1,4 @@
-## Copyright (C) 2006, 2009-2011 Free Software Foundation, Inc.
+## Copyright (C) 2006, 2009-2012 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, 2009-2011 Free Software Foundation, Inc.
+Copyright (C) 2006, 2009-2012 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, 2008-2011 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2008-2012 Free Software Foundation, Inc.
 #
 # This file is part of Bison, the GNU Compiler Compiler.
 #
@@ -134,8 +134,8 @@ sub calc_grammar ($$$)
    or die;
  print $out <<EOF;
 %{
+#include <assert.h>
 #include <stdio.h>
-
 #include <stdlib.h>
 #include <string.h>
 #include <ctype.h>
@@ -291,9 +291,8 @@ yylex (void)
 static int
 power (int base, int exponent)
 {
+  assert (0 <= exponent);
  int res = 1;
-  if (exponent < 0)
-    exit (3);
  for (/* Niente */; exponent; --exponent)
    res *= base;
  return res;
@@ -1,16 +0,0 @@
-#! /bin/sh
-
-for dir in . po src doc; do
-  (
-    cd $dir && rcs2log -r -l \
-  -u 'akim	Akim Demaille	[email protected]' \
-  -u 'djm	David J. MacKenzie	[email protected]' \
-  -u 'eggert	Paul Eggert	[email protected]' \
-  -u 'friedman	Noah Friedman	[email protected]' \
-  -u 'hag	Daniel Hagerty	[email protected]' \
-  -u 'jthilo	Jesse Thilo	[email protected]' \
-  -u 'meyering	Jim Meyering	[email protected]' \
-  -u 'rms	Richard Stallman	[email protected]' \
-  | sed -e 's,/opt/cvs/bison/bison/,,g' > ChangeLog
-  )
-done
@@ -1,5 +1,5 @@
 ## Process this file with automake to produce Makefile.in -*-Makefile-*-
-## Copyright (C) 2005, 2009-2011 Free Software Foundation, Inc.
+## Copyright (C) 2005, 2009-2012 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, 2009-2011 Free Software Foundation, Inc.
+## Copyright (C) 2005-2006, 2009-2012 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
@@ -22,7 +22,7 @@ BISON = $(top_builddir)/tests/bison
 BISON_IN = $(top_srcdir)/tests/bison.in

 $(BISON): $(BISON_IN)
-	cd $(top_builddir)/tests && $(MAKE) $(AM_MAKEFLAGS) bison
+	$(AM_V_GEN)cd $(top_builddir)/tests && $(MAKE) $(AM_MAKEFLAGS) bison

 ## ------------ ##
 ## Extracting.  ##
@@ -32,13 +32,13 @@ doc = $(top_srcdir)/doc/bison.texinfo
 extexi = $(top_srcdir)/examples/extexi
 # Extract in src.
 $(srcdir)/calc.stamp: $(doc) $(extexi)
-	rm -f $@ $@.tmp
-	touch $@.tmp
-	cd $(srcdir) && \
+	$(AM_V_GEN)rm -f $@ $@.tmp
+	$(AM_V_at)touch $@.tmp
+	$(AM_V_at)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 $@
+	$(AM_V_at)mv $@.tmp $@

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

@@ -61,14 +61,14 @@ EXTRA_DIST =					\
 # 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)
-	@rm -f calc++-parser.tmp
-	@touch calc++-parser.tmp
-	$(BISON) -d -ra -S lalr1.cc -o $(srcdir)/calc++-parser.cc \
+	$(AM_V_GEN)rm -f calc++-parser.tmp
+	$(AM_V_at)touch calc++-parser.tmp
+	$(AM_V_at)$(BISON) -d -ra -S lalr1.cc -o $(srcdir)/calc++-parser.cc \
 	  $(srcdir)/calc++-parser.yy
-	@mv -f calc++-parser.tmp $@
+	$(AM_V_at)mv -f calc++-parser.tmp $@

 $(calc_sources_generated): $(srcdir)/calc++-parser.stamp
-	@if test -f $@; then :; else \
+	$(AM_V_GEN)if test -f $@; then :; else \
 	  rm -f $(srcdir)/calc++-parser.stamp && \
 	  $(MAKE) $(AM_MAKEFLAGS) $(srcdir)/calc++-parser.stamp; \
 	fi
@@ -81,11 +81,11 @@ $(calc_sources_generated): $(srcdir)/calc++-parser.stamp
 check_PROGRAMS = calc++

 calc_sources_extracted = $(srcdir)/calc++-scanner.ll $(srcdir)/calc++.cc \
-	$(srcdir)/calc++-driver.hh $(srcdir)/calc++-driver.cc
+  $(srcdir)/calc++-driver.hh $(srcdir)/calc++-driver.cc
 calc_extracted = $(calc_sources_extracted) $(srcdir)/calc++-parser.yy
 calc_sources_generated = \
-	$(srcdir)/stack.hh $(srcdir)/position.hh $(srcdir)/location.hh \
-	$(srcdir)/calc++-parser.hh $(srcdir)/calc++-parser.cc
+  $(srcdir)/stack.hh $(srcdir)/position.hh $(srcdir)/location.hh \
+  $(srcdir)/calc++-parser.hh $(srcdir)/calc++-parser.cc

 calc___SOURCES = $(calc_sources_extracted) $(calc_sources_generated)

@@ -1,5 +1,20 @@
 #! /bin/sh

+# Copyright (C) 2005-2012 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/>.
+
 test -z "$VERBOSE" && {
   exec > /dev/null 2>&1
   set -x
@@ -2,7 +2,7 @@

 # This file is part of GNU Bison

-# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2011 Free Software
+# Copyright (C) 1992, 2000-2001, 2005-2006, 2009-2012 Free Software
 # Foundation, Inc.
 #
 # This program is free software: you can redistribute it and/or modify
@@ -1,4 +1,3 @@
-
 /*.a
 /*.bak
 /*.o
@@ -23,6 +22,7 @@
 /c-ctype.h
 /c-strcase.h
 /c-strcasecmp.c
+/c-strcaseeq.h
 /c-strncasecmp.c
 /calloc.c
 /charset.alias
@@ -30,10 +30,14 @@
 /cloexec.h
 /close-hook.c
 /close-hook.h
+/close-stream.c
+/close-stream.h
 /close.c
+/closeout.c
+/closeout.h
 /config.charset
 /config.h
-/config.hin
+/config.in.h
 /configmake.h
 /dirname-lgpl.c
 /dirname.c
@@ -54,19 +58,25 @@
 /fcntl.c
 /fcntl.h
 /fcntl.in.h
+/fd-hook.c
+/fd-hook.h
 /fd-safer-flag.c
 /fd-safer.c
 /float+.h
+/float.c
 /float.h
 /float.in.h
 /fopen-safer.c
 /fopen.c
+/fpending.c
+/fpending.h
 /fprintf.c
 /fpucw.h
 /frexp.c
 /frexpl.c
 /fseterr.c
 /fseterr.h
+/fstat.c
 /getdtablesize.c
 /getopt.c
 /getopt.h
@@ -89,6 +99,7 @@
 /isnanl-nolibm.h
 /isnanl.c
 /iswblank.c
+/itold.c
 /ldexpl.c
 /localcharset.c
 /localcharset.h
@@ -106,14 +117,18 @@
 /mbuiter.h
 /memchr.c
 /memchr.valgrind
+/msvc-inval.c
+/msvc-inval.h
+/msvc-nothrow.c
+/msvc-nothrow.h
 /nonblocking.c
 /nonblocking.h
 /obstack.c
 /obstack.h
 /open.c
+/pathmax.h
 /perror.c
 /pipe-safer.c
-/pipe.c
 /pipe2-safer.c
 /pipe2.c
 /printf-args.c
@@ -125,10 +140,13 @@
 /printf-parse.c
 /printf-parse.h
 /printf.c
+/progname.c
+/progname.h
 /quote.c
 /quote.h
 /quotearg.c
 /quotearg.h
+/raise.c
 /rawmemchr.c
 /rawmemchr.valgrind
 /realloc.c
@@ -186,7 +204,10 @@
 /strchrnul.valgrind
 /strdup.c
 /streq.h
+/strerror-override.c
+/strerror-override.h
 /strerror.c
+/strerror_r.c
 /string.h
 /string.in.h
 /stripslash.c
@@ -206,6 +227,7 @@
 /sys_stat.in.h
 /sys_wait.h
 /sys_wait.in.h
+/sysexits.in.h
 /time.h
 /time.in.h
 /unistd--.h
@@ -237,9 +259,12 @@
 /wctype.in.h
 /wcwidth.c
 /xalloc-die.c
+/xalloc-oversized.h
 /xalloc.h
 /xmalloc.c
 /xsize.h
 /xstrndup.c
 /xstrndup.h
-
+/xmemdup0.c
+/xmemdup0.h
+/sys_types.in.h
@@ -1,6 +1,6 @@
 # Make bison/lib.

-# Copyright (C) 2001-2004, 2006, 2008-2011 Free Software Foundation,
+# Copyright (C) 2001-2004, 2006, 2008-2012 Free Software Foundation,
 # Inc.

 # This program is free software: you can redistribute it and/or modify
@@ -16,6 +16,16 @@
 # You should have received a copy of the GNU General Public License
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.

+AM_CFLAGS =
+AM_CPPFLAGS =
+BUILT_SOURCES =
+CLEANFILES =
+EXTRA_DIST =
+MOSTLYCLEANDIRS =
+MOSTLYCLEANFILES =
+SUFFIXES =
+noinst_LIBRARIES =
+
 include gnulib.mk

 AM_CFLAGS += $(WARN_CFLAGS)
@@ -1,6 +1,6 @@
 /* Array bitsets.

-   Copyright (C) 2002-2003, 2006, 2009-2011 Free Software Foundation,
+   Copyright (C) 2002-2003, 2006, 2009-2012 Free Software Foundation,
   Inc.

   Contributed by Michael Hayes ([email protected]).
@@ -1,6 +1,6 @@
 /* Functions to support abitsets.

-   Copyright (C) 2002, 2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Base bitset stuff.

-   Copyright (C) 2002-2004, 2006, 2009-2011 Free Software Foundation,
+   Copyright (C) 2002-2004, 2006, 2009-2012 Free Software Foundation,
   Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
@@ -1,6 +1,6 @@
 /* General bitsets.

-   Copyright (C) 2002-2006, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Generic bitsets.

-   Copyright (C) 2002-2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Bitset statistics.

-   Copyright (C) 2002-2006, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -253,15 +253,15 @@ bitset_stats_read (const char *file_name)
  if (file)
    {
      if (fread (&bitset_stats_info_data, sizeof (bitset_stats_info_data),
-		 1, file) != 1)
-	{
-	  if (ferror (file))
-	    perror (_("Could not read stats file."));
-	  else
-	    fprintf (stderr, _("Bad stats file size.\n"));
-	}
+                 1, file) != 1)
+        {
+          if (ferror (file))
+            perror (_("cannot read stats file"));
+          else
+            fprintf (stderr, _("bad stats file size\n"));
+        }
      if (fclose (file) != 0)
-	perror (_("Could not read stats file."));
+        perror (_("cannot read stats file"));
    }
  bitset_stats_info_data.runs++;
 }
@@ -283,13 +283,13 @@ bitset_stats_write (const char *file_name)
  if (file)
    {
      if (fwrite (&bitset_stats_info_data, sizeof (bitset_stats_info_data),
-		  1, file) != 1)
-	perror (_("Could not write stats file."));
+                  1, file) != 1)
+        perror (_("cannot write stats file"));
      if (fclose (file) != 0)
-	perror (_("Could not write stats file."));
+        perror (_("cannot write stats file"));
    }
  else
-    perror (_("Could not open stats file for writing."));
+    perror (_("cannot open stats file for writing"));
 }


@@ -576,11 +576,9 @@ bitset_stats_list (bitset bset, bitset_bindex *list,
  bitset_bindex tmp;
  bitset_bindex size;
  bitset_bindex i;
-  enum bitset_type type;

  count = BITSET_LIST_ (bset->s.bset, list, num, next);

-  type = BITSET_TYPE_ (bset->s.bset);
  BITSET_STATS_LISTS_INC (bset->s.bset);

  /* Log histogram of number of set bits.  */
@@ -1,6 +1,6 @@
 /* Functions to support bitset statistics.

-   Copyright (C) 2002-2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Bitset vectors.

-   Copyright (C) 2001-2002, 2004, 2006, 2009-2011 Free Software
+   Copyright (C) 2001-2002, 2004, 2006, 2009-2012 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 /* Bitset vectors.

-   Copyright (C) 2002, 2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2012 Free Software Foundation, Inc.

   Contributed by Akim Demaille (akim@freefriends.org).

@@ -1,6 +1,6 @@
 /* Bitset vectors.

-   Copyright (C) 2001-2002, 2004-2006, 2009-2011 Free Software
+   Copyright (C) 2001-2002, 2004-2006, 2009-2012 Free Software
   Foundation, Inc.

   This program is free software: you can redistribute it and/or modify
@@ -1,6 +1,6 @@
 /* Bitset vectors.

-   Copyright (C) 2002, 2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Functions to support expandable bitsets.

-   Copyright (C) 2002-2006, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1335,17 +1335,12 @@ ebitset_bytes (bitset_bindex n_bits ATTRIBUTE_UNUSED)
 bitset
 ebitset_init (bitset bset, bitset_bindex n_bits)
 {
-  bitset_windex size;
-
  bset->b.vtable = &ebitset_vtable;

  bset->b.csize = EBITSET_ELT_WORDS;

  EBITSET_ZERO_SET (bset);

-  size = n_bits ? (n_bits + EBITSET_ELT_BITS - 1) / EBITSET_ELT_BITS
-    : EBITSET_INITIAL_SIZE;
-
  EBITSET_ASIZE (bset) = 0;
  EBITSET_ELTS (bset) = 0;
  ebitset_resize (bset, n_bits);
@@ -1,6 +1,6 @@
 /* Functions to support ebitsets.

-   Copyright (C) 2002, 2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* get-errno.c - get and set errno.

-   Copyright (C) 2002, 2006, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2006, 2009-2012 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, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2012 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 @@
 /* Functions to support link list bitsets.

-   Copyright (C) 2002-2004, 2006, 2009-2011 Free Software Foundation,
+   Copyright (C) 2002-2004, 2006, 2009-2012 Free Software Foundation,
   Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).
@@ -352,7 +352,7 @@ lbitset_elt_find (bitset bset, bitset_windex windex,

      /* ELT is the nearest to the one we want.  If it's not the one
 	 we want, the one we want does not exist.  */
-      if (elt && (windex - elt->index) < LBITSET_ELT_WORDS)
+      if (windex - elt->index < LBITSET_ELT_WORDS)
 	{
 	  bset->b.cindex = elt->index;
 	  bset->b.csize = LBITSET_ELT_WORDS;
@@ -936,17 +936,12 @@ lbitset_ones (bitset dst)
 static void
 lbitset_not (bitset dst, bitset src)
 {
-  lbitset_elt *elt;
  lbitset_elt *selt;
  lbitset_elt *delt;
  bitset_windex i;
  unsigned int j;
  bitset_windex windex;

-  /* This is another unfriendly operation for a linked list
-     bitset!  */
-  elt = LBITSET_TAIL (dst);
-
  windex = (BITSET_SIZE_ (dst) + BITSET_WORD_BITS - 1) / BITSET_WORD_BITS;

  for (i = 0; i < windex; i += LBITSET_ELT_WORDS)
@@ -1,6 +1,6 @@
 /* Functions to support lbitsets.

-   Copyright (C) 2002, 2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Fake libiberty.h for Bison.

-   Copyright (C) 2002-2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002-2004, 2009-2012 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
@@ -24,7 +24,7 @@
 # define BISON_LIBIBERTY_H_ 1

 # ifndef __attribute__
-#  if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8) || __STRICT_ANSI__
+#  if __GNUC__ < 2 || (__GNUC__ == 2 && __GNUC_MINOR__ < 8)
 #   define __attribute__(x)
 #  endif
 # endif
@@ -1,6 +1,6 @@
 /* Yacc library main function.

-   Copyright (C) 2002, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2012 Free Software Foundation, Inc.

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

@@ -1,6 +1,6 @@
 /* Timing variables for measuring compiler performance.

-   Copyright (C) 2000, 2002, 2004, 2006, 2009-2011 Free Software
+   Copyright (C) 2000, 2002, 2004, 2006, 2009-2012 Free Software
   Foundation, Inc.

   Contributed by Alex Samuel <samuel@codesourcery.com>
@@ -1,7 +1,7 @@
 /* This file contains the definitions for timing variables used to -*- C -*-
   measure run-time performance of the compiler.

-   Copyright (C) 2002, 2007, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2007, 2009-2012 Free Software Foundation, Inc.

   Contributed by Akim Demaille <akim@freefriends.org>.

@@ -1,6 +1,6 @@
 /* Timing variables for measuring compiler performance.

-   Copyright (C) 2000, 2002, 2004, 2009-2011 Free Software Foundation,
+   Copyright (C) 2000, 2002, 2004, 2009-2012 Free Software Foundation,
   Inc.

   Contributed by Alex Samuel <samuel@codesourcery.com>
@@ -1,6 +1,6 @@
 /* Variable array bitsets.

-   Copyright (C) 2002-2006, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002-2006, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Functions to support vbitsets.

-   Copyright (C) 2002, 2004, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2004, 2009-2012 Free Software Foundation, Inc.

   Contributed by Michael Hayes (m.hayes@elec.canterbury.ac.nz).

@@ -1,6 +1,6 @@
 /* Yacc library error-printing function.

-   Copyright (C) 2002, 2009-2011 Free Software Foundation, Inc.
+   Copyright (C) 2002, 2009-2012 Free Software Foundation, Inc.

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

@@ -24,5 +24,7 @@ int yyerror (char const *);
 int
 yyerror (char const *message)
 {
-  return fprintf (stderr, "%s\n", message);
+  fputs (message, stderr);
+  fputc ('\n', stderr);
+  return 0;
 }
@@ -1,4 +1,3 @@
-
 /00gnulib.m4
 /alloca.m4
 /argmatch.m4
@@ -6,7 +5,9 @@
 /assert.m4
 /calloc.m4
 /cloexec.m4
+/close-stream.m4
 /close.m4
+/closeout.m4
 /codeset.m4
 /config-h.m4
 /configmake.m4
@@ -28,13 +29,16 @@
 /fcntl_h.m4
 /float_h.m4
 /fopen.m4
+/fpending.m4
 /fpieee.m4
 /fprintf-posix.m4
 /frexp.m4
 /frexpl.m4
+/fstat.m4
 /getdtablesize.m4
 /getopt.m4
 /gettext.m4
+/glibc2.m4
 /glibc21.m4
 /gnulib-cache.m4
 /gnulib-common.m4
@@ -44,7 +48,11 @@
 /iconv.m4
 /include_next.m4
 /inline.m4
+/intdiv0.m4
+/intl.m4
+/intldir.m4
 /intlmacosx.m4
+/intmax.m4
 /intmax_t.m4
 /inttypes-pri.m4
 /inttypes.m4
@@ -57,6 +65,9 @@
 /iswblank.m4
 /javacomp.m4
 /javaexec.m4
+/largefile.m4
+/lcmessage.m4
+/ldexp.m4
 /ldexpl.m4
 /lib-ld.m4
 /lib-link.m4
@@ -66,6 +77,7 @@
 /locale-fr.m4
 /locale-ja.m4
 /locale-zh.m4
+/lock.m4
 /longlong.m4
 /malloc.m4
 /math_h.m4
@@ -78,12 +90,14 @@
 /memchr.m4
 /mmap-anon.m4
 /mode_t.m4
+/msvc-inval.m4
+/msvc-nothrow.m4
 /multiarch.m4
 /nls.m4
 /nocrash.m4
 /open.m4
+/pathmax.m4
 /perror.m4
-/pipe.m4
 /pipe2.m4
 /po.m4
 /posix_spawn.m4
@@ -95,6 +109,7 @@
 /progtest.m4
 /quote.m4
 /quotearg.m4
+/raise.m4
 /rawmemchr.m4
 /realloc.m4
 /sched_h.m4
@@ -112,6 +127,7 @@
 /spawn-pipe.m4
 /spawn_h.m4
 /sprintf-posix.m4
+/ssize_t.m4
 /stat.m4
 /stdbool.m4
 /stddef_h.m4
@@ -124,6 +140,7 @@
 /strchrnul.m4
 /strdup.m4
 /strerror.m4
+/strerror_r.m4
 /string_h.m4
 /strndup.m4
 /strnlen.m4
@@ -134,13 +151,16 @@
 /sys_socket_h.m4
 /sys_stat_h.m4
 /sys_wait_h.m4
+/sysexits.m4
 /threadlib.m4
 /time_h.m4
+/uintmax_t.m4
 /unistd-safer.m4
 /unistd_h.m4
 /unlocked-io.m4
 /vasnprintf.m4
 /vfprintf-posix.m4
+/visibility.m4
 /vsnprintf-posix.m4
 /vsnprintf.m4
 /vsprintf-posix.m4
@@ -156,4 +176,5 @@
 /xalloc.m4
 /xsize.m4
 /xstrndup.m4
-
+/off_t.m4
+/sys_types_h.m4
@@ -1,6 +1,6 @@
 # bison-i18n.m4 serial 2

-dnl Copyright (C) 2005-2006, 2009-2011 Free Software Foundation, Inc.
+dnl Copyright (C) 2005-2006, 2009-2012 Free Software Foundation, Inc.

 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -1,6 +1,6 @@
 # Sanity test a C compiler.

-# Copyright (C) 2006, 2009-2011 Free Software Foundation, Inc.
+# Copyright (C) 2006, 2009-2012 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, 2009-2011 Free Software Foundation, Inc.
+# Copyright (C) 2004, 2006, 2009-2012 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
--- a/Show More
+++ b/Show More
@@ -1 +1 @@
 .3b
 .5