[libstdc++, testsuite] Add dg-require-thread-fence

[Christophe Lyon]

On 14 November 2016 at 18:54, Mike Stump <mikestump@comcast.net> wrote:
> On Oct 21, 2016, at 1:00 AM, Christophe Lyon <christophe.lyon@linaro.org> wrote:
>>
>> So if we say that the current behaviour has to keep being the default,
>> so that users think about what they are really doing,
>
> Having a toolchain not work by default to force users to think, isn't a winning strategy.
>
> Everything should always, just work.  Those things that don't, we should fix.
>
I tend to agree :-)

Maybe Ramana changed his mind and would now no longer want to force
users to think?