Preprocessor equality test, is this standard?

Question

I had envisaged one of these in the project preferences

• TESTING = HOST
• TESTING = TARGET

Answer 1

I had the same problem. It used to be the compiler would error if the #if parameter was not defined which is what I wanted. I learned the hard way this is no longer the case. The solution I came up with is as follows:

#define BUILDOPT 3

#if 3/BUILDOPT == 1
    
#endif

If BUILDOPT is not defined you get a compile error for divide by 0. If BUILDOPT != 3 && > 0 the #if fails.