SDCC Z80 crt0.s & __GSINIT

U ntil now, I've been using SDCC without fully mastering its compilation and linking process. For simple applications on the Z80 processor, it usually worked fine, even if I sometimes encountered code that didn't behave exactly as I expected. By making simple workarounds in my C code, I could easily bypass the issue. But this time, the situation is different. Indeed, I need to test the…