Compatible C++ Versions

[LMcG]

Hi, we have a legacy piece of software that uses Qt version 5.12 compiled using VS 2019 with toolset v140. We would like to upgrade our version of Qt to 6.7 and I would like to know whether I can continue to use this VS toolset?

[Christian Ehrlicher]

Qt 6.7 supports VS2019: https://doc.qt.io/qt-6/supported-platforms.html
But not sure if it supports the old v140 toolset - why do you need especially this one? Why can't you update to the latest VS2019 or even VS2022? VS2019 might get dropped after 6.8

[LMcG]

@Christian-Ehrlicher we have a legacy piece of software that relies on other third party components which have dependencies on this toolset. We would have to get new versions of these components, some of which are no longer supported. We can do it - but its just a bit of a job. One which we'd prefer not to do at the moment

[DerReisende]

@LMcG When you switch to VS 2022 17.10+ and still using older components just be careful wrt to binary compatibility. I just spent several days solving the mystery why an app that ran fine for years suddenly started to crash on startup after the compiler update.