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+2011-05-01  Joel E. Denny  <joeldenny@joeldenny.org>
+
+	doc: clean up quotation style in NEWS.
+	* NEWS (2.5): For multi-character tokens in example grammar rules,
+	use "token" not 'token'.  In English, use a consistent quotation
+	style; we might as well follow the precedent seen in info pages:
+	`quote' not "quote".
+
+2011-04-16  Joel E. Denny  <joeldenny@joeldenny.org>
+
+	tests: pacify gcc 4.6.0's -Wunused-but-set-variable.
+	Reported by Jim Meyering at
+	<http://lists.gnu.org/archive/html/bug-bison/2011-04/msg00002.html>.
+	* tests/actions.at
+	(Default %printer and %destructor for mid-rule values): Define
+	YYLLOC_DEFAULT so that it uses its Rhs argument.
+
+2011-04-16  Joel E. Denny  <joeldenny@joeldenny.org>
+
+	glr.c: omit yyresolveLocations when locations are disabled.
+	This prevents gcc 4.6.0's -Wunused-but-set-variable from warning
+	about yyresolveLocations's local yyrhsloc.  When locations are
+	enabled, there's no such warning because YYLLOC_DEFAULT then uses
+	yyrhsloc.  Reported by Jim Meyering at
+	<http://lists.gnu.org/archive/html/bug-bison/2011-04/msg00002.html>.
+	* data/glr.c (yyresolveLocations): Omit definition when locations
+	are disabled.
+	(yyresolveValue): Omit yyresolveLocations invocation when
+	locations are disabled.
+
+2011-04-16  Joel E. Denny  <joeldenny@joeldenny.org>
+
+	gnulib, autoconf: update.
+	* README-hacking (Updating a submodule): Give advice on how to
+	determine the versions of gnulib and autoconf to which we should
+	update.
+	(Release Procedure): Note that submodules should be updated.
+	* bootstrap.conf (gnulib_modules): Rename pipe to spawn-pipe as
+	suggested in updated gnulib NEWS.
+	* gnulib: Choose a stable snapshot according to advice in Bison's
+	README-hacking.
+	* po/POTFILES.in (lib/pipe.c): Rename to...
+	(lib/spawn-pipe.c): ... this.
+	* src/output.c: Update to include spawn-pipe.h.
+	* submodules/autoconf: Update to latest for improvement in m4.m4
+	that excludes M4 with buggy strstr.  The only other changes to
+	files that we use are copyright updates.
+
 2011-04-09  Joel E. Denny  <joeldenny@joeldenny.org>
 
 	Fix missing updates to GPLv3.