[Interest] Bluetooth library and old windows versions

[Oliver Wolff]

Hi,


On 23/08/2018 13:30, maitai wrote:
> Hello,
>
> I have a problem with users equipped with an old version of Windows 
> (8, or 7). The latest version of my app (Qt 5.11.1/MSVC 2017 based) 
> required QtBluetooth but when users load the app they get a message 
> saying:
>
> "This Windows version does not support the required Bluetooth API. 
> Consider updating to a more recent Windows (10.0.10586 or above)"
>
> Then they press OK and the app shuts down.
>
> I understand the message and have no problem removing BT 
> functionalities for these users with old Windows versions, but my 
> question is: can I avoid to build several binaries, i.e. is there a 
> way not to load QtBluetooth if windows version is not recent enough ? 
> Any other suggestion ?
The message is shown when the dll is loaded, so unfortunately I only see 
two other ways of working around the problem.
1) You could try to dlopen the library and lazy load all the 
functionality you need. That would mean, that you have to resolve every 
function though...
2) You could put your Bluetooth code into a plugin. If that fails to 
load, the application will not exit immediately, but only the plugin 
loading will fail then.
>
> Thanks
> Philippe.
>
>
BR,
Olli
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