ANY way to hack your own ifdef directives?

BlitzMax Forums/BlitzMax Beginners Area/ANY way to hack your own ifdef directives?

What is actually the problem with setting a const in a file that is included in ALL sources?

Which either sets or not sets a const?

Where is the actual difference to ifdef there?
Can't see it, perhaps you just think of all that stuff the wrong way round or too much in C++ terms instead of BM terms (bm is not C++ and has some major behavior differences)