I invite you to have a look to https://github.com/fepitre/qwt-crossbuild/ and you can check build instructions in README. Please note this is a version without GUI component. I’ve refactored a little bit things to have normal Qubes component build process :). I won’t probably go farther on this because I’ve decided to continue the work initiated from Marek to attempt to revive Qubes Windows components last year based on the work done in qwt-crossbuild. I’ll will focus on them in order to have us a build of QWT in R4.1 as in R4.0.
Tested on a Windows 10 PRO:
[user@windows-mgmt qwt-crossbuild]$ qvm-run -p work-qubesos-win "cmd.exe"
Microsoft Windows [Version 10.0.19042.631]
(c) 2020 Microsoft Corporation. All rights reserved.
C:\Windows\system32>cmd.exe& exit
Microsoft Windows [Version 10.0.19042.631]
(c) 2020 Microsoft Corporation. All rights reserved.
C:\Windows\system32>