[patch] libstdc++/64658 define std::atomic_init()

[Jonathan Wakely]

On 19/01/15 16:02 +0000, Jonathan Wakely wrote:
>We declare atomic_init() but then never define it, I assume that's
>just an accident.
>
>Although the standard says this function is non-atomic, the simplest
>fix at this stage is just to do an atomic store (when we get to stage
>1 again I'd like to make the function a friend of std::__atomic_base<>
>so it can set the private member variable directly as a simple
>non-atomic assignment).
>
>Tested x86_64-linux, *not* committed to trunk.

Now committed to trunk.

>commit 061dd1a073ef4646727a3f29dfa3169a760757b3
>Author: Jonathan Wakely <jwakely@redhat.com>
>Date:   Sun Jan 18 17:40:17 2015 +0000
>
>    	PR libstdc++/64658
>    	* include/std/atomic (atomic_init): Define.
>    	* testsuite/29_atomics/atomic/64658.cc: New.