-diff -u -r ../ctags-ff448e2e2a08325c95f2e162ae50fb899392d99f/configure.ac ./configure.ac
---- ../ctags-ff448e2e2a08325c95f2e162ae50fb899392d99f/configure.ac 2016-11-28 06:04:11.000000000 -0500
-+++ ./configure.ac 2016-11-28 17:57:01.052817678 -0500
+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.
AM_INIT_AUTOMAKE([foreign subdir-objects])
AM_SILENT_RULES([yes])
AC_CONFIG_HEADERS([config.h])
-@@ -593,7 +600,7 @@
- [have_libxml=yes
- AC_DEFINE(HAVE_LIBXML)],
- [have_libxml=no])
+@@ -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 "no" = xyes)
++AM_CONDITIONAL(HAVE_LIBXML, [test true = false])
- AH_TEMPLATE([HAVE_JANSSON],
- [Define this value if jansson is available.])
+ AC_ARG_ENABLE([json],
+ [AS_HELP_STRING([--disable-json],