Can't implement conformant memset/memcpy without compiler -ffreestanding support

[rikki cattermole]

On 25/07/2018 8:59 PM, Zheng (Vic) Luo wrote:
> Minimal example in D: https://run.dlang.io/is/EYVTzb. Affects at least 
> dmd and ldc.
> 

https://run.dlang.io/is/8tPOVX

Note that switch void* to ubyte* won't matter once its extern(C)'d.

My version (_memcpy_impl2) is just the regular old memcpy without 
optimizations. Your example is syntax sugar for a function call.