[Development] Qt for WebAssembly

[Lorn Potter]

On 03/14/2018 07:54 PM, Morten Sørvig wrote:
> 
>> On 9 Mar 2018, at 13:57, Morten Sørvig <Morten.Sorvig at qt.io> wrote:
>>
>> * (No) thread support
>>
>>  Wasm and Emscripten do have pthreads support. However this requires SharedArrayBuffer, 
>>  which has been disabled in all major browser after recent security incidents.
>>
>>  So we are looking to upstream a no-thread configure option, and modules that
>>  want to work on the web should support it. It’s still possible to develop with
>>  pthreads enabled by enabling SharedArrayBuffer for your browser.
> 
> 
> It was pointed out to me that we already have pending patches in this area:
> 
> https://codereview.qt-project.org/181112
not sure why anyone would want to stop/block execution of the one and
only thread.

> https://codereview.qt-project.org/180973
> https://codereview.qt-project.org/180971
> https://codereview.qt-project.org/180972
 ^ these we already have :)


> https://codereview.qt-project.org/177459
Certainly our thread feature needs to be fixed for non wasm builds.

> 
> I suggest we restore and merge those since we now have an additional use
> case in the form of a platform requirement.
> 
> (The alternative would be to wait it out - perhaps threading support will be
> enabled and stable in all browsers before we get to merge wip/webassembly).

I keep watching out for this in wasm/emscripten. It's been a 'soon'
feature for a while.