Re: __sync_lock_test_and_set on ARM

[David Daney <ddaney at avtrex dot com>]

Phil Endecott wrote:
> Andrew Haley wrote:
> > David Daney writes:
> >  > There is nothing that says that __sync_compar_and_swap() cannot 
> > expand  > to a libcall.
> >
> > Err, if a port doen't have an implementation, that's what gcc does
> > anyway.  :-)
>
> That's what the docs say, but actually if you try to use __sync_* on ARM 
> you'll get a linker error.  A library implementation would need to be 
> OS-specific.
Someone has to write the library function.  Evidently that has not been 
done yet.

David Daney