Is it possible to Build a Qt app targeting Windows XP using Qt 5.12 running on Windows 10?

Question

We decided to develop a POS app which is compatible with Windows XP also, since 40% of small scale shop owners in India are using windows XP system with 512 MB RAM

We decided to try Qt creater since it's C++ based development because C++ based GUI consumes less RAM due to native code complied whereas.Net framework based apps took more memory since it runs above CLR

Now our issue is,

We came to know that Qt creater stopped support for XP

Now the confusion is, whether the IDE stopped supporting or whole framework stopped support

For instance, Visual studio 2019 don't support XP

But we able to develop XP compatible apps using VS 2019 in windows 10 by Targeting.Net framework 4.0. Now I need to know whether the same procedure also applies for Qt 5.12

That is, Am I able to build a Qt app using Qt 5.12 running in windows 10 by Targeting windows XP by choosing a older versions of Qt framework in the same way I chose.Net 4.0 for XP in VS 2019? . OR I have to download Qt 5.5 only to build for XP?

Answer 1

No, you can't use Qt 5.12 to target Windows Xp, you will need to get an older version of Qt, according to this wiki page Qt 5.6 is the newest that still have Xp support.

Also Visual Studio 2019 doesn't support Xp, you will need to install older tool-set (v141) to be able to target Xp, read more on msdn here and here