+#endif /* wxUSE_FS_ARCHIVE */
+
+#if wxUSE_BACKINGFILE
+# if !wxUSE_STREAMS
+# ifdef wxABORT_ON_CONFIG_ERROR
+# error "wxBackingFile requires wxStream"
+# else
+# undef wxUSE_STREAMS
+# define wxUSE_STREAMS 1
+# endif
+# endif
+# if !wxUSE_FILE && !wxUSE_FFILE
+# ifdef wxABORT_ON_CONFIG_ERROR
+# error "wxBackingFile requires wxFile or wxFFile"
+# else
+# undef wxUSE_FFILE
+# define wxUSE_FFILE 1
+# endif
+# endif