diff -u -r ../ctags-15504fe2d0c84b6dbcb0b8a5c594424dd383185e/configure.ac ./configure.ac
--- ../ctags-15504fe2d0c84b6dbcb0b8a5c594424dd383185e/configure.ac	2017-01-23 15:00:41.000000000 +0100
+++ ./configure.ac	2017-01-24 20:17:41.484033433 +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])
@@ -587,13 +594,7 @@
 
 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
-PKG_CHECK_MODULES(LIBXML, [libxml-2.0 >= 2.7.7],
-		       [have_libxml=yes
-		       AC_DEFINE(HAVE_LIBXML)],
-		       [have_libxml=no])
-AM_CONDITIONAL(HAVE_LIBXML, test "x$have_libxml" = xyes)
+AM_CONDITIONAL(HAVE_LIBXML, [test true = false])
 
 AH_TEMPLATE([HAVE_JANSSON],
 	[Define this value if jansson is available.])