Preprocessor / #define macros

Differences compared with EC/CreativE:

• Null-arg macros are supported Example: #define BLA() ..stuff..
• Variable arguments are supported Example: #define Bla(x,y,…) [1,2,x,y,…,NIL] Note: If “…” in body is immediately preceded by “,” (as in above example), The “,” will get removed automatically if the “…” argument is empty.
• Defines may be exported explicitly: EXPORT #define ...