How can one suppress just the "defining argument" messages?

Since Csound doesn’t have macro concatenation predefined like in C (##), I had to defined as

#define C(X'Y) #$X$Y#

But since I use that $C a lot in the subsequent to emulate structures in Csound 6 (by prefixing fields with some ‘object’ name), I’m getting spammed with “defining argument” message on startup. How can one cut down just those “defining argument” messages from being printed?