IDA 9.2 / Qt 6 support

[cross-of-north]

Starting from version 9.2 IDA uses Qt 6.

IDA developers provide the compatibility layer for Python scripts using Qt 5, but no compatibility layer included for C++ plugins compiled for Qt 5, so the latest official Labeless release refuses to load with IDA 9.2 and 9.3 (at least on Windows - it fails to locate Qt 5 DLLs).

This PR implements code changes required to build Labeless IDA plugin along with Qt 6 and the latest IDA SDK.
The resulting plugin DLL works with IDA 9.2, 9.3.

Known limitations:

• Only Windows plugin is currently implemented/tested.
• The only major feature that was tested is export of labels from IDA to x64dbg (including GUI "Labeless configuration" dialog).
• Changes introduced should not affect older IDA plugins build process or behavior, but I haven't tested whether it is truly so.

[a1ext]

Hi @cross-of-north, thanks for submitting the PR, I will check it soon :)

[a1ext]

Sorry for the delay, actually shit happens I have no ability to build plugin on windows. I definitely will take a look at the PR when I have good env.
Thanks :)

[a1ext]

Thank you, I will merge it to a separate branch and polish it a bit myself, instead of bothering you with that 👍

[a1ext]

Hi @cross-of-north I see in IDA 9.3 downloads there is a "patched Qt 6.8" archive, jus with binaries, did your build worked well on IDA 9.3? Have you seen the patch they did somewhere, so I can apply it?

[cross-of-north]

Hi @a1ext,
If I understand the question correctly, to build I have not applied any separate patches. I just followed IDA authors' current instructions; the process which I've summarized here:
https://github.com/cross-of-north/labeless/tree/ida9_2?tab=readme-ov-file#development ("Visual Studio 2022 + IDA SDK to build IDA's 9.2+ plugin...")

And I've mostly built it and tested with 9.3 version; references to 9.2 are because that's the version where new Qt was first integrated and compatibility was broken.