/* XXX: this is a hack; we really want the ImageMagick call but GraphicsMagick doesn't have it;
this may cause random test failures on platforms that use GraphicsMagick.
*/
-#ifdef DCPOMATIC_IMAGE_MAGICK
+#ifdef DCPOMATIC_ADVANCED_MAGICK_COMPARE
double const dist = ref_image.compare(check_image, Magick::RootMeanSquaredErrorMetric);
BOOST_CHECK_MESSAGE (dist < 0.001, ref << " differs from " << check << " " << dist);
#else