Hi. I use OVERLAY(PRINTF ! *) on my linker command line to prevent an L15. Now the L15 only exists in the following condition: #define A 1 #define B 1 If only 1 are active no problem. The proble comes in the scenario where: //#define A 1 //#define B 1 which is possible if I don't need features A and B. How can I only do the OVERLAY(PRINTF ! *) based on features selected in a header file. Is that possible? Thanks.