[Simh] clang (was Re: XCode and LTO)

[Sergey Oboguev]

> From: Peter Svensson <psvsimh at psv.nu>
> What is the rom code comparing against and why do we not do the delay compared 
>to that? 
>
> If it is against the real time clock, would not nanosleep() or just polling the 
>time be more portable?

Time flow quantum exposed to applications in a portable way is not  in the 
nanosecond range, but is in the range of several milliseconds.
Delay has to be performed to a small fraction of this quantum.