@jacadcaps
Did you mean gcc 4 on morphos ? Because for example os4 version of gcc which i use, 4.4.3, for sure have that attribute (dunno why if gcc4 not intended for, maybe they add workarounds for)

Anyway, it seems that its better to never use that VARARGS68K stuff and rewrite it all the time to make all compilers happy, and code in end will looks better.