+# Checks GTK+ 3.0
+PKG_CHECK_MODULES(GTK, gtk+-3.0)
+# ensure that only allowed headers are included
+GTK_CFLAGS+=" -DGTK_DISABLE_SINGLE_INCLUDES "
+# ensure that no gtk deprecated symbols are used
+GTK_CFLAGS+=" -DGDK_DISABLE_DEPRECATED "
+GTK_CFLAGS+=" -DGTK_DISABLE_DEPRECATED "
+# ensure use of accessors
+GTK_CFLAGS+=" -DGSEAL_ENABLE "