AC_ARG_ENABLE(libxml2, [ --enable-libxml2 Use libxml2 instead of Expat])
+PKG_PROG_PKG_CONFIG
+
if test "$enable_libxml2" = "yes" -o "$expat" = "no"; then
PKG_CHECK_MODULES([LIBXML2], [libxml-2.0 >= 2.6])
AC_DEFINE_UNQUOTED(ENABLE_LIBXML2,1,[Use libxml2 instead of Expat])