please keep the options in alphabetical order!
*/
+#ifndef wxUSE_BACKINGFILE
+# ifdef wxABORT_ON_CONFIG_ERROR
+# error "wxUSE_BACKINGFILE must be defined."
+# else
+# define wxUSE_BACKINGFILE 0
+# endif
+#endif /* !defined(wxUSE_BACKINGFILE) */
+
#ifndef wxUSE_CRASHREPORT
/* this one is special: as currently it is Windows-only, don't force it
to be defined on other platforms */
# endif
#endif /* wxUSE_ZIPSTREAM */
+#if wxUSE_BACKINGFILE
+# if !wxUSE_STREAMS || (!wxUSE_FILE && !wxUSE_FFILE)
+# ifdef wxABORT_ON_CONFIG_ERROR
+# error "wxBackingFile requires wxStream and wxFile or wxFFile"
+# else
+# undef wxUSE_BACKINGFILE
+# define wxUSE_BACKINGFILE 0
+# endif
+# endif
+#endif /* wxUSE_BACKINGFILE */
+
/* the rest of the tests is for the GUI settings only */
#if wxUSE_GUI