Re: unlinkat

> Does glibc have an emulation for ENOSYS?
> How would you even do that?
> 
> Just adding those syscalls is trivial but since they are so new, I
> wonder what the benefit would be.  You could not rely on those syscalls
> being there, so you'd have to keep the extra state anyway.  Or am I
> missing something?

 If I'm not mistaken, glibc checks the current kernel version (yes,
the compiling machine's kernel version, but I believe you can work
around that...) and compiles in the right set of syscalls for a given
kernel.
 You could have a compile-time option saying whether or not to include
the new syscalls into the diet libc.

-- 
 Laurent