How can I implement the following functionality?

[King8611]

Hello, I would like to implement a macro definition feature similar to C++. Here is an example code. Could you please guide me on how to achieve this?

#define GIsShipping

#if GIsShipping then
    #define Log(...) Log(...)
#else
    #define Log(...) 
#endif

[King8611]

My goal is to avoid modifying the existing code in the project and prevent memory allocation and garbage collection for the strings passed to Log in the shipping version.