[Qt-creator] RFC: Dropping support for Python 2.x for GDB/LLDB #2

[Alexandru Croitor]

> On 27. Feb 2020, at 12:22, Eike Ziller <Eike.Ziller at qt.io> wrote:
> 
> 
> 
>> On 27. Feb 2020, at 11:55, Alexandru Croitor <alexandru.croitor at qt.io> wrote:
>> 
>> 
>> 
>>> On 27. Feb 2020, at 11:52, Eike Ziller <Eike.Ziller at qt.io> wrote:
>>> 
>>> 
>>> 
>>>> On 27. Feb 2020, at 11:27, Alexandru Croitor <alexandru.croitor at qt.io> wrote:
>>>> 
>>>> 
>>>>> On 26. Feb 2020, at 23:09, André Pönitz <apoenitz at t-online.de> wrote:
>>>>> 
>>>>> Times have changed.  Mac/LLDB is now on 3.x.
>>>> 
>>>> Hi,
>>>> 
>>>> I'll be annoying, and once again point out that this will exclude macOS <= 10.14 developers : )
>>>> 
>>>> What's our current minimum supported macOS version for Qt Creator?
>>> 
>>> Our binaries are built with Qt 5.14.1, and therefore support macOS 10.13.
>>> You still _can_ build Qt Creator yourself with Qt 5.11.
>>> 
>>>> Would it perhaps make sense to drop Py2 support when the minimum is 10.15?
>>> 
>>> Enough when the minimum is 10.14, right?
>> 
>> Why 10.14? Did 10.14 already uses Python 3 for lldb?
> 
> All versions of Xcode 11 so far are supported on macOS 10.14, if Wikipedia is correct.
> 
> I would have assumed that this is bound to the Xcode version, not the macOS version.

It looks like you're right about Xcode 11 lldb, it loads a bundle Python framework

/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/Python3
/Applications/Xcode.app/Contents/Developer/Library/Frameworks/Python3.framework/Versions/3.7/lib/python3.7/lib-dynload/_heapq.cpython-37m-darwin.so

whereas for Xcode 10 on 10.14, lldb loads system Python libraries from 

/System/Library/Frameworks/Python.framework/Versions/2.7/lib/python2.7/lib-dynload/_ctypes.so, etc


So 10.14 + Xcode 11 + latest Creator (no Py2) = debugging works
So 10.14 + Xcode 10 + latest Creator (no Py2) = debugging broken

I guess because we always ask for latest Xcode on a certain macOS version when using Qt, 
10.14 would be a fair point to drop Py2 support from the macOS perspective.

Of course there's still other feedback.


> 
>> 
>>> So I suppose that would be end of this year after macOS 10.16 is out,
>>> == Qt Creator 4.14.
>>> 
>>> So, how about dropping LLDB/python2 support with Qt Creator 4.14?
>>> 
>>> Br, Eike
>>> 
>>>> 
>>>> Otherwise we'd get an interesting state of being able to build applications with Qt Creator on an older macOS that Qt Creator supports, but not debug them.
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>>> 
>>> -- 
>>> Eike Ziller
>>> Principal Software Engineer
>>> 
>>> The Qt Company GmbH
>>> Erich-Thilo-Straße 10
>>> D-12489 Berlin
>>> eike.ziller at qt.io
>>> http://qt.io
>>> Geschäftsführer: Mika Pälsi,
>>> Juha Varelius, Mika Harjuaho
>>> Sitz der Gesellschaft: Berlin, Registergericht: Amtsgericht Charlottenburg, HRB 144331 B
>> 
> 
> -- 
> Eike Ziller
> Principal Software Engineer
> 
> The Qt Company GmbH
> Erich-Thilo-Straße 10
> D-12489 Berlin
> eike.ziller at qt.io
> http://qt.io
> Geschäftsführer: Mika Pälsi,
> Juha Varelius, Mika Harjuaho
> Sitz der Gesellschaft: Berlin, Registergericht: Amtsgericht Charlottenburg, HRB 144331 B