http://gcc.gnu.org/bugzilla/show_bug.cgi?id=54124
--- Comment #2 from Kevin Scott <kscott at eznet dot net> 2012-07-30 02:40:29 UTC --- Now that you mention it, I looked again, and it in fact is there, in the gcc manual. The problem was that, on my prior readings, I instinctively ignored the entire '-dCHARS' section, as it didn't seem like the thing I was looking for. So it might be a little clearer to include the '-d' with each of the five suboptions.
