+2012-01-06 Jim Meyering <meyering@redhat.com>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ 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 <joeldenny@joeldenny.org>
+
+ Prepare for the possibility of a 2.5.1 release.
+ * NEWS (2.5.1): New heading.
+
+2011-05-14 Joel E. Denny <joeldenny@joeldenny.org>
+
+ Version 2.5.
+ * NEWS (2.5): Set date.
+
+2011-05-14 Joel E. Denny <joeldenny@joeldenny.org>
+
+ Don't use IF_LINT in Bison sources.
+ It creates unnecessary differences between the sources that Bison
+ maintainers build and test (given that maintainers normally
+ configure with --enable-gcc-warnings) and the sources that Bison
+ users build. Instead, use PACIFY_CC, which doesn't. This change
+ fixes compiler warnings reported by Tys Lefering at
+ <http://lists.gnu.org/archive/html/bison-patches/2011-05/msg00004.html>.
+ * configure.ac: Don't AC_DEFINE lint regardless of the configure
+ options. This change affects imported gnulib sources, where
+ IF_LINT still appears and depends on lint.
+ * src/scan-gram.l, src/scan-skel.l: Replace uses of IF_LINT with
+ PACIFY_CC.
+ * src/system.h (IF_LINT): Remove cpp macro.
+ (PACIFY_CC): New cpp macro.
+