[PATCH] Add __sync_fetch_and_nand (again)

[Joerg Sonnenberger]

On Sun, Sep 21, 2014 at 05:00:02PM +0000, hfinkel at anl.gov wrote:
> It is true, however, that we still set __GNUC_MINOR__ to 2
> (corresponding to GCC 4.2). To compensate for this, and to address the
> original concern regarding code relying on the old semantics, I've
> added a warning in this patch that specifically details the fact that
> the semantics have changed and that we provide the newer semantics.

How to disable the warning from code? How to detect the fixed semantic?
IMO without addressing it, we shouldn't readd it.

Joerg