how do I find out the default -mcpu and -mattr values?


Before experimenting with these settings: how do I know what the defaults are?


They default to the current CPU on your system. I don't think that there is an easy way to get it to print out the perceived CPU, but if you put a breakpoint in GetCurrentX86CPU() or GetCurrentPowerPCCPU() and see what it returns, that will tell you for sure :slight_smile: