[v3] add missing dg-require to tests

[Jonathan Wakely]

On 7 November 2011 21:05, Jonathan Wakely wrote:
> On 7 November 2011 20:58, Eric Botcazou wrote:
>>> Tested x86_64-linux and committed to trunk.
>>>
>>>         * testsuite/30_threads/async/49668.cc: Add missing dg-require.
>>>         * testsuite/30_threads/packaged_task/49668.cc: Likewise.
>>
>> We have a related failure on SPARC/Solaris for some time:
>>
>> FAIL: 30_threads/call_once/49668.cc (test for excess errors)
>> WARNING: 30_threads/call_once/49668.cc compilation failed to produce executable
>>
>> [...]
>> /nile.build/botcazou/gcc-head/sparc-sun-solaris2.8/sparc-sun-solaris2.8/libstdc\
>> ++-v3/include/tuple:105:12: error: use of deleted
>> function 'moveable::moveable(const moveable&)'
>> /nile.build/botcazou/gcc-head/src/libstdc++-v3/testsuite/30_threads/call_once/49668.cc
>>
>> It can be reproduced with a cross-compiler targetting sparc-sun-solaris2.9 and
>> the .ii file.  I can open a PR if you want.
>
> I'll look into it - thanks
>

Aha, this is a problem with all platforms where _GLIBCXX_HAVE_TLS is
not defined, std::call_once uses std:function which assumes a copyable
target object.

I'm working on it ..