diff -u -r ../ctags-a39f842455fdcc47b812c35c6bf0f19735034de0/configure.ac ./configure.ac
--- ../ctags-a39f842455fdcc47b812c35c6bf0f19735034de0/configure.ac	2017-02-24 10:02:41.000000000 +0100
+++ ./configure.ac	2017-03-01 18:10:59.298643710 +0100
@@ -7,7 +7,14 @@
 #	Process this file with autoconf to produce a configure script.
 
 AC_PREREQ([2.59])
-AC_INIT([universal-ctags],[0.0.0])
+# Avoid identifying as
+#   Universal Ctags 0.0.0, Copyright (C) 2015 Universal Ctags Team
+#   Universal Ctags is derived from Exuberant Ctags.
+#   Exuberant Ctags 5.8, Copyright (C) 1996-2009 Darren Hiebert
+# since that causes at least vim-easytags to identify the ctags
+# version as 0.0.0, see
+# https://github.com/xolox/vim-easytags/blob/master/autoload/xolox/easytags.vim
+AC_INIT([universal-ctags],[5.8])
 AM_INIT_AUTOMAKE([foreign subdir-objects])
 AM_SILENT_RULES([yes])
 AC_CONFIG_HEADERS([config.h])
@@ -591,16 +598,7 @@
 
 AH_TEMPLATE([HAVE_LIBXML],
 	[Define this value if libxml is available.])
-dnl About the condition of version
-dnl see https://mail.gnome.org/archives/xml/2010-February/msg00008.html
-AS_IF([test "x$enable_xml" != "xno"], [
-	PKG_CHECK_MODULES(LIBXML, [libxml-2.0 >= 2.7.7],
-			       [have_libxml=yes
-			       AC_DEFINE(HAVE_LIBXML)],
-			       [AS_IF([test "x$enable_xml" = "xyes"], [
-			           AC_MSG_ERROR([libxml2 not found])])])
-])
-AM_CONDITIONAL(HAVE_LIBXML, test "x$have_libxml" = xyes)
+AM_CONDITIONAL(HAVE_LIBXML, [test true = false])
 
 AC_ARG_ENABLE([json],
 	[AS_HELP_STRING([--disable-json],