Yesterday you posted different #define's and you stated that you had ensured that the blackslash was immediately follwed by a newline.

What about today's #define's? Are you sure that these backslashes are immediately followed by a newline?

If so, this would look like a gcc bug. But yesterday's post showed that you have at least 4 #define's in total with a blackslash but you have only 3 pairs of error messages. I suspect an error on your part involving those 3 #define's. I would expect a compiler bug to be more consistent.

The "bible" states "each occurrence of a backslash character followed by a newline is deleted, thus splicing lines." I'd be surprised if gcc got this wrong.

If nothing else, join the lines yourself in an editor.