+2014-05-16 Paul Eggert <eggert@cs.ucla.edu>
+
+ Don't require pkg-config when building from repository.
+ * INSTALL: Prefer './configure FOO=BAR' to 'FOO=BAR ./configure'.
+ * INSTALL.REPO: pkg-config is no longer required to build from
+ the repository.
+ * autogen.sh: Don't check for pkg-config.
+ (progs): Remove pkg-config.
+ (pkg_config_min, AUTORECONF_ENV, env_space, ACLOCAL_PATH):
+ Remove. All uses removed.
+ * m4/pkg.m4: New file, built by admin/merge-pkg-config.
+ * configure.ac: Remove unnecessary m4_pattern_forbid of ^PKG_ and
+ an AC_ARG_VAR of PKG_CONFIG_PATH. pkg.m4 does that for us.
+ (EMACS_CHECK_MODULES): Remove workaround for old pkg-config bug,
+ as we use pkg.m4 from a newer pkg-config.
+
+2014-05-15 Jan Djärv <jan.h.d@swipnet.se>
+
+ * configure.ac (LIBPNG): Do not test for libpng if NS_IMPL_COCOA.
+
+2014-05-13 Dmitry Antipov <dmantipov@yandex.ru>
+
+ * configure.ac (HAVE_XFIXES): Define if available.
+ (XFIXES_CFLAGS, XFIXES_LIBS): New AC_SUBSTs.
+ (--enable-link-time-optimization): Add clang support.
+ * INSTALL: Mention it.
+
+2014-05-12 Katsumi Yamaoka <yamaoka@jpl.org>
+
+ * configure.ac (EMACS_CHECK_MODULES): Fix typo in previous change.
+
+2014-05-11 Paul Eggert <eggert@cs.ucla.edu>
+
+ Work around bug in pkg-config before 0.26 (Bug#17438).
+ * configure.ac (EMACS_CHECK_MODULES): Check for failed exit status
+ of pkg-config, on older pkg-config versions that don't do it
+ properly.
+
+2014-05-07 Glenn Morris <rgm@gnu.org>
+
+ * autogen.sh: Check for failing aclocal.
+
+2014-05-05 Glenn Morris <rgm@gnu.org>
+
+ * autogen.sh: Check any pre-existing ACLOCAL_PATH.
+
+2014-05-04 Paul Eggert <eggert@cs.ucla.edu>
+
+ Consult libpng-config more consistently (Bug#17339).
+ This is mainly for simplicity, but it should also avoid
+ some future problems like the ones we recently had with NetBSD.
+ * configure.ac (LIBPNG): Configure after LIBZ. Use libpng-config
+ for cflags, too. Append -lz if we're not already doing that with
+ LIBZ. Do not bother appending -lm, since we always append that.
+ Coalesce some duplicate code.
+
+ * autogen.sh: Use ‘"’ to quote a message that often contains ‘'’.