$NetBSD: patch-ac,v 1.2 2012/12/25 21:04:32 joerg Exp $

--- configure.ac.orig	2006-12-24 18:43:36.000000000 +0000
+++ configure.ac
@@ -52,7 +52,10 @@ if test -n "$XML_CONFIG" && test -n "$TR
   if test $LIBXML2_VERSION -eq 2616; then
     AC_DEFINE([XML_SAVE_FORMAT], [1], [The libxml2 version 2.6.16 has no such option defined in the library headers])
   fi
-  if test $LIBXML2_VERSION -ge 2616; then
+  good_libxml2=no
+  case "$LIBXML2_VERSION" in 27*|28*|29*) good_libxml2=yes;; esac
+  test $LIBXML2_VERSION -ge 2616 && good_libxml2=yes
+  if test $good_libxml2 = yes; then
     AC_DEFINE([HAVE_LIBXML2])
     LIBXML2_LIBS="`$XML_CONFIG --libs`"
     LIBXML2_CFLAGS="`$XML_CONFIG --cflags`"