[LLVMdev] RFC: LLVM should require a working C++11 <thread>, <mutex>, and <atomic>

[Anton Korobeynikov]

Also, can't we simply provide some dummy <mutex> / <thread> on mingw
systems and warn loudly about single-threaded stuff?

This was a precedent actually - when LLVM started to use atomics,
everyone w/o them ended with non-reentrant LLVM and everything was ok.

On Wed, Sep 24, 2014 at 7:00 PM, David Chisnall
<David.Chisnall at cl.cam.ac.uk> wrote:
> On 24 Sep 2014, at 05:59, Mueller-Roemer, Johannes Sebastian <Johannes.Sebastian.Mueller-Roemer at igd.fraunhofer.de> wrote:
>
>> <atomic> should work both in win32 and pthread versions of MinGW. <mutex> and <thread> are only supported in the pthread version though.
>
> <atomic> is trivial, as most of the support is provided by the compiler.  As of Vista, Windows comes with some quite sane primitives for implementing <mutex> and <thread>, so it would only be 1-2 days of work for someone to write the implementation for libc++.
>
> I'd suggest that the total effort that has gone into this thread so far is close to the amount of effort required to add the missing support...
>
> David
>
>
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-- 
With best regards, Anton Korobeynikov
Faculty of Mathematics and Mechanics, Saint Petersburg State University