fix wxFilesystem compilation if wxUSE_FFILE is 0 but wxUSE_FILE is 1; disable wxFileSystem if both wxUSE_(F)FILE are 0 (modified patch 1569960)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@41589 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/chkconf.h

@@ -1027,6 +1027,14 @@
 #           define wxUSE_STREAMS 1
 #       endif
 #   endif
+#   if !wxUSE_FILE && !wxUSE_FFILE
+#       ifdef wxABORT_ON_CONFIG_ERROR
+#           error "wxUSE_FILESYSTEM requires either wxUSE_FILE or wxUSE_FFILE"
+#       else
+#           undef wxUSE_FILESYSTEM
+#           define wxUSE_FILESYSTEM 0
+#       endif
+#   endif
 #endif /* wxUSE_FILESYSTEM */
 
 #if wxUSE_FS_INET

src/common/filesys.cpp

@@ -214,7 +214,13 @@ wxFSFile* wxLocalFSHandler::OpenFile(wxFileSystem& WXUNUSED(fs), const wxString&
 
     // we need to check whether we can really read from this file, otherwise
     // wxFSFile is not going to work
+#if wxUSE_FILE
+    wxFileInputStream *is = new wxFileInputStream(fullpath);
+#elif wxUSE_FFILE
     wxFFileInputStream *is = new wxFFileInputStream(fullpath);
+#else
+#error One of wxUSE_FILE or wxUSE_FFILE must be set to 1 for wxFSHandler to work
+#endif
     if ( !is->Ok() )
     {
         delete is;