And yes, -ENOPATCH.

On 4 April 2016 at 21:42, Ville Voutilainen <ville.voutilainen@gmail.com> wrote:
> Tested on Linux-PPC64.
>
> 2016-04-04  Ville Voutilainen  <ville.voutilainen@gmail.com>
>
>      PR libstdc++/70437
>      * include/bits/stl_pair.h (_ConstructiblePair,
>     _ImplicitlyConvertiblePair, _MoveConstructiblePair,
>     _ImplicitlyMoveConvertiblePair): Add shortcut conditions
>     for same-type cases.
>     * testsuite/20_util/pair/70437.cc: New.