[Bug target/64368] [5 Regression] Several libstdc++ test failures on non-linux platforms after r218964.

[dominiq at lps dot ens.fr]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=64368

--- Comment #21 from Dominique d'Humieres <dominiq at lps dot ens.fr> ---
> On x86_64-apple-darwin14, the failures are now reduced to...

> FAIL: 22_locale/conversions/string/2.cc execution test
> FAIL: 23_containers/unordered_map/requirements/explicit_instantiation/2.cc
> (test for excess errors)
> FAIL: 23_containers/unordered_map/requirements/explicit_instantiation/4.cc
> (test for excess errors)
> FAIL: 30_threads/shared_lock/cons/1.cc (test for excess errors)
> ...

Confirmed, thanks for the fix. The first failure is covered by pr64797, the
23_containers/* failures are covered by pr64813, and I'll open a new PR for the
remaining ones ASAP. I am waiting for feedback from the other platforms before
closing the PR as FIXED.