if test x"$with_gui" != x"no" ; then
PKG_CHECK_MODULES(GTK, gtk+-2.0 >= $required_gtk_version,,
[PSPP_REQUIRED_PREREQ([gtk+ 2.0 v$required_gtk_version or later (or use --without-gui)])])
+ AC_PATH_PROG([XMLLINT], [xmllint], [echo], [$PATH])
+ AC_SUBST(XMLLINT)
fi
AM_CONDITIONAL(WITHGUI, test x"$with_gui" != x"no")