When doing "diff -bBupwr" of two directories, dir and dir.orig to capture the differences, the util doesn't include files that exist only in dir, it only reports that e.g. dir/app.c exists only in dir/, but I would like it to be added in a resulting diff file, so that it could be applied as a patch.
I checked 'man diff' but no clues was found. I'd appreciate helpful advises for this. Thanks.