Where to put debug flag in Xcode4?

I am curious about where to put the debug flag in开发者_运维问答 Xcode4. Currently I have [LLVM compiler 2.0 Preprocessing] > [Preprocessing Macros] > [debug] set to DEBUG=1. Is this the right place (it seems to work), or can this now be added to the new scheme system?

That's where I've been putting it and so far it's worked fine for me.