Any particular reason why mmap family functions aren't hidden in ld.so?

[H.J. Lu]

On Thu, Oct 15, 2015 at 12:49 PM, Roland McGrath <roland@hack.frob.com> wrote:
>> Why does Hurd need PLT?
>
> The functions in ld.so are special versions that can only be used at
> bootstrap time.  Once libc.so is loaded, open, mmap, etc. all come from
> there.  It's neither feasible nor desireable in the Hurd to have full
> duplicates of the libc functions in ld.so.
>

Does Hurd support symbol versioning?  If yes, how is mmap exported
from ld.so for Hurd?


H.J.