@c0de517e Yes you're quite right. Interestingly, breakpoints can be set e.g. in main.cpp on any line that produces runtime code, such as a declaration that launches a constructor. But how to stop at the first code.. Looking up my callstack (and this will be compiler- and runtime-dependent) I see a fn called _initterm() which loops through initializer functions calling them in turn. This seems to be where the globals are created. You can break in _initterm, I don't know if that's the first.